diff --git a/STM8/Makefile b/STM8/Makefile
new file mode 100644
index 0000000..afd91ed
--- /dev/null
+++ b/STM8/Makefile
@@ -0,0 +1,30 @@
+NAME=sco_platform
+SDCC=sdcc
+
+CCFLAGS=-DSTM8S105 -I../ -I/usr/share/sdcc/include -mstm8 --out-fmt-ihx
+LDFLAGS= -mstm8 --out-fmt-ihx -lstm8
+FLASHFLAGS=-cstlinkv2 -pstm8s105?4
+
+SRC=$(wildcard *.c)
+DEFS = -DEBUG
+
+OBJ=$(SRC:%.c=%.rel)
+TRASH=$(OBJ) $(SRC:%.c=%.rst) $(SRC:%.c=%.asm) $(SRC:%.c=%.lst)
+TRASH+=$(SRC:%.c=%.sym) $(NAME).lk $(NAME).map $(NAME).cdb
+INDEPENDENT_HEADERS=stm8l.h ports_definition.h Makefile
+
+all: $(NAME).ihx
+
+clean:
+	rm -f $(TRASH)
+
+load: $(NAME).ihx
+	stm8flash $(FLASHFLAGS) -w $(NAME).ihx
+
+%.rel: %.c
+	$(SDCC) $(CCFLAGS) $(DEFS) -c $<
+
+$(NAME).ihx: $(OBJ)
+	$(SDCC) $(LDFLAGS) $(OBJ) -o $(NAME).ihx
+
+.PHONY: all
diff --git a/STM8/Readme.md b/STM8/Readme.md
new file mode 100644
index 0000000..5f6fcae
--- /dev/null
+++ b/STM8/Readme.md
@@ -0,0 +1,15 @@
+SCORPIO platform controller
+============================
+
+### Based on STM8
+
+PINS description
+
+* D6 - USART Rx
+* D5 - USART Tx
+* D0..D2 - select motors pair
+* D3, D4 - select motor from pair
+* C1..C3 - LED1..LED3
+* B0..B3 - stepper motors' outputs
+* B4, B5, F4 - relays (shutter, neon, flat)
+* A1, A2 - end-switches ("-" and "+")
diff --git a/STM8/interrupts.c b/STM8/interrupts.c
new file mode 100644
index 0000000..a911a49
--- /dev/null
+++ b/STM8/interrupts.c
@@ -0,0 +1,217 @@
+/*
+ * interrupts.c
+ *
+ * Copyright 2014 Edward V. Emelianoff <eddy@sao.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include "ports_definition.h"
+#include "stepper.h"
+#include "uart.h"
+
+// Top Level Interrupt
+INTERRUPT_HANDLER(TLI_IRQHandler, 0){}
+
+// Auto Wake Up Interrupt
+INTERRUPT_HANDLER(AWU_IRQHandler, 1){}
+
+// Clock Controller Interrupt
+INTERRUPT_HANDLER(CLK_IRQHandler, 2){}
+
+// External Interrupt PORTA
+INTERRUPT_HANDLER(EXTI_PORTA_IRQHandler, 3){}
+
+// External Interrupt PORTB
+INTERRUPT_HANDLER(EXTI_PORTB_IRQHandler, 4){}
+
+// External Interrupt PORTC
+INTERRUPT_HANDLER(EXTI_PORTC_IRQHandler, 5){}
+
+// External Interrupt PORTD
+INTERRUPT_HANDLER(EXTI_PORTD_IRQHandler, 6){
+}
+
+// External Interrupt PORTE
+INTERRUPT_HANDLER(EXTI_PORTE_IRQHandler, 7){}
+
+#ifdef STM8S903
+// External Interrupt PORTF
+INTERRUPT_HANDLER(EXTI_PORTF_IRQHandler, 8){}
+#endif // STM8S903
+
+#if defined (STM8S208) || defined (STM8AF52Ax)
+// CAN RX Interrupt routine.
+INTERRUPT_HANDLER(CAN_RX_IRQHandler, 8){}
+
+// CAN TX Interrupt routine.
+INTERRUPT_HANDLER(CAN_TX_IRQHandler, 9){}
+#endif // STM8S208 || STM8AF52Ax
+
+// SPI Interrupt routine.
+INTERRUPT_HANDLER(SPI_IRQHandler, 10){}
+
+// Timer1 Update/Overflow/Trigger/Break Interrupt
+INTERRUPT_HANDLER(TIM1_UPD_OVF_TRG_BRK_IRQHandler, 11){
+    if(TIM1_SR1 & TIM_SR1_UIF){ // update interrupt
+//        Global_time++; // increase timer
+    }
+    TIM1_SR1 = 0; // clear all interrupt flags
+}
+
+// Timer1 Capture/Compare Interrupt routine.
+INTERRUPT_HANDLER(TIM1_CAP_COM_IRQHandler, 12){}
+
+#ifdef STM8S903
+// Timer5 Update/Overflow/Break/Trigger Interrupt
+INTERRUPT_HANDLER(TIM5_UPD_OVF_BRK_TRG_IRQHandler, 13){}
+
+// Timer5 Capture/Compare Interrupt
+INTERRUPT_HANDLER(TIM5_CAP_COM_IRQHandler, 14){}
+
+#else // STM8S208, STM8S207, STM8S105 or STM8S103 or STM8AF62Ax or STM8AF52Ax or STM8AF626x
+
+volatile char Ustep = 0;
+// Timer2 Update/Overflow/Break Interrupt
+INTERRUPT_HANDLER(TIM2_UPD_OVF_BRK_IRQHandler, 13){ // generate pulses for stepper CLK
+    char tmp;
+    U8 sw;
+    if(TIM2_SR1 & TIM_SR1_UIF){
+        TIM2_SR1 &= ~TIM_SR1_UIF; // take off flag
+        if(Steps_left == 0){
+            stop_motor();
+            return;
+        }
+        tmp = PORT(STP_PORT, ODR) & ~STP_PINS;
+        PORT(STP_PORT, ODR) = tmp | usteps[Ustep];
+
+        sw = check_endsw();
+        if(Dir){
+            if(--Ustep < 0){
+                Ustep = 7;
+                --Steps_left;
+                if(sw == 1){
+                    stop_motor();
+                    return;
+                }
+            }
+        }else{
+            if(++Ustep > 7){
+                Ustep = 0;
+                --Steps_left;
+                if(sw == 2){
+                    stop_motor();
+                    return;
+                }
+            }
+        }
+    }
+}
+
+
+// Timer2 Capture/Compare Interrupt
+INTERRUPT_HANDLER(TIM2_CAP_COM_IRQHandler, 14){
+}
+#endif // STM8S903
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S105) || \
+    defined(STM8S005) ||  defined (STM8AF62Ax) || defined (STM8AF52Ax) || defined (STM8AF626x)
+// Timer3 Update/Overflow/Break Interrupt
+INTERRUPT_HANDLER(TIM3_UPD_OVF_BRK_IRQHandler, 15){}
+
+// Timer3 Capture/Compare Interrupt
+INTERRUPT_HANDLER(TIM3_CAP_COM_IRQHandler, 16){}
+#endif // STM8S208, STM8S207 or STM8S105 or STM8AF62Ax or STM8AF52Ax or STM8AF626x
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
+    defined(STM8S003) ||  defined (STM8AF62Ax) || defined (STM8AF52Ax) || defined (STM8S903)
+// UART1 TX Interrupt
+INTERRUPT_HANDLER(UART1_TX_IRQHandler, 17){}
+
+// UART1 RX Interrupt
+INTERRUPT_HANDLER(UART1_RX_IRQHandler, 18){}
+#endif // STM8S208 or STM8S207 or STM8S103 or STM8S903 or STM8AF62Ax or STM8AF52Ax
+
+// I2C Interrupt
+INTERRUPT_HANDLER(I2C_IRQHandler, 19){}
+
+#if defined(STM8S105) || defined(STM8S005) ||  defined (STM8AF626x)
+// UART2 TX interrupt
+INTERRUPT_HANDLER(UART2_TX_IRQHandler, 20){
+    if(UART2_SR & UART_SR_TXE){
+        if(tx_len == 0){
+            UART2_CR2 &= ~UART_CR2_TIEN; // disable TXE interrupt
+            tx_idx = 0;
+            return;
+        }
+        if(tx_idx < tx_len){
+            UART2_DR = UART_tx[tx_idx++];
+        }else{
+            UART2_CR2 &= ~UART_CR2_TIEN;
+            tx_idx = 0;
+            tx_len = 0;
+            return;
+        }
+    }
+}
+
+// UART2 RX interrupt
+INTERRUPT_HANDLER(UART2_RX_IRQHandler, 21){
+    U8 rb;
+    if(UART2_SR & UART_SR_RXNE){ // data received
+        rb = UART2_DR; // read received byte & clear RXNE flag
+        //while(!(UART2_SR & UART_SR_TXE));
+        UART_rx[rx_idx++] = rb; // put received byte into cycled buffer
+        //UART2_DR = rb;
+        if(rx_idx == UART_BUF_LEN && rb != '\n'){ // Oops: buffer overflow! Just forget old data
+            rx_idx = 0;
+            return;
+        }
+        if(rb == '\n'){
+            uart_rdy = 1;
+            UART_rx[rx_idx] = 0;
+        }
+    }
+}
+#endif // STM8S105 or STM8AF626x
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+// UART3 TX interrupt
+INTERRUPT_HANDLER(UART3_TX_IRQHandler, 20){}
+
+// UART3 RX interrupt
+INTERRUPT_HANDLER(UART3_RX_IRQHandler, 21){}
+#endif // STM8S208 or STM8S207 or STM8AF52Ax or STM8AF62Ax
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+// ADC2 interrupt
+INTERRUPT_HANDLER(ADC2_IRQHandler, 22){}
+#else
+// ADC1 interrupt
+INTERRUPT_HANDLER(ADC1_IRQHandler, 22){
+}
+#endif // STM8S208 or STM8S207 or STM8AF52Ax or STM8AF62Ax
+
+#ifdef STM8S903
+// Timer6 Update/Overflow/Trigger Interrupt
+INTERRUPT_HANDLER(TIM6_UPD_OVF_TRG_IRQHandler, 23){}
+#else // STM8S208, STM8S207, STM8S105 or STM8S103 or STM8AF52Ax or STM8AF62Ax or STM8AF626x
+// Timer4 Update/Overflow Interrupt
+INTERRUPT_HANDLER(TIM4_UPD_OVF_IRQHandler, 23){}
+#endif // STM8S903
+
+// Eeprom EEC Interrupt
+INTERRUPT_HANDLER(EEPROM_EEC_IRQHandler, 24){}
diff --git a/STM8/interrupts.h b/STM8/interrupts.h
new file mode 100644
index 0000000..6edf384
--- /dev/null
+++ b/STM8/interrupts.h
@@ -0,0 +1,144 @@
+/*
+ * interrupts.h
+ *
+ * Copyright 2014 Edward V. Emelianoff <eddy@sao.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+#pragma once
+#ifndef __INTERRUPTS_H__
+#define __INTERRUPTS_H__
+
+#include "stm8l.h"
+
+// Top Level Interrupt
+INTERRUPT_DEFINITION(TLI_IRQHandler, 0);
+
+// Auto Wake Up Interrupt
+INTERRUPT_DEFINITION(AWU_IRQHandler, 1);
+
+// Clock Controller Interrupt
+INTERRUPT_DEFINITION(CLK_IRQHandler, 2);
+
+// External Interrupt PORTA
+INTERRUPT_DEFINITION(EXTI_PORTA_IRQHandler, 3);
+
+// External Interrupt PORTB
+INTERRUPT_DEFINITION(EXTI_PORTB_IRQHandler, 4);
+
+// External Interrupt PORTC
+INTERRUPT_DEFINITION(EXTI_PORTC_IRQHandler, 5);
+
+// External Interrupt PORTD
+INTERRUPT_DEFINITION(EXTI_PORTD_IRQHandler, 6);
+
+// External Interrupt PORTE
+INTERRUPT_DEFINITION(EXTI_PORTE_IRQHandler, 7);
+
+#ifdef STM8S903
+// External Interrupt PORTF
+INTERRUPT_DEFINITION(EXTI_PORTF_IRQHandler, 8);
+#endif // STM8S903
+
+#if defined (STM8S208) || defined (STM8AF52Ax)
+// CAN RX Interrupt routine.
+INTERRUPT_DEFINITION(CAN_RX_IRQHandler, 8);
+
+// CAN TX Interrupt routine.
+INTERRUPT_DEFINITION(CAN_TX_IRQHandler, 9);
+#endif // STM8S208 || STM8AF52Ax
+
+// SPI Interrupt routine.
+INTERRUPT_DEFINITION(SPI_IRQHandler, 10);
+
+// Timer1 Update/Overflow/Trigger/Break Interrupt
+INTERRUPT_DEFINITION(TIM1_UPD_OVF_TRG_BRK_IRQHandler, 11);
+
+// Timer1 Capture/Compare Interrupt routine.
+INTERRUPT_DEFINITION(TIM1_CAP_COM_IRQHandler, 12);
+
+#ifdef STM8S903
+// Timer5 Update/Overflow/Break/Trigger Interrupt
+INTERRUPT_DEFINITION(TIM5_UPD_OVF_BRK_TRG_IRQHandler, 13);
+
+// Timer5 Capture/Compare Interrupt
+INTERRUPT_DEFINITION(TIM5_CAP_COM_IRQHandler, 14);
+
+#else // STM8S208, STM8S207, STM8S105 or STM8S103 or STM8AF62Ax or STM8AF52Ax or STM8AF626x
+// Timer2 Update/Overflow/Break Interrupt
+INTERRUPT_DEFINITION(TIM2_UPD_OVF_BRK_IRQHandler, 13);
+
+// Timer2 Capture/Compare Interrupt
+INTERRUPT_DEFINITION(TIM2_CAP_COM_IRQHandler, 14);
+#endif // STM8S903
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S105) || \
+    defined(STM8S005) ||  defined (STM8AF62Ax) || defined (STM8AF52Ax) || defined (STM8AF626x)
+// Timer3 Update/Overflow/Break Interrupt
+INTERRUPT_DEFINITION(TIM3_UPD_OVF_BRK_IRQHandler, 15);
+
+// Timer3 Capture/Compare Interrupt
+INTERRUPT_DEFINITION(TIM3_CAP_COM_IRQHandler, 16);
+#endif // STM8S208, STM8S207 or STM8S105 or STM8AF62Ax or STM8AF52Ax or STM8AF626x
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
+    defined(STM8S003) ||  defined (STM8AF62Ax) || defined (STM8AF52Ax) || defined (STM8S903)
+// UART1 TX Interrupt
+INTERRUPT_DEFINITION(UART1_TX_IRQHandler, 17);
+
+// UART1 RX Interrupt
+INTERRUPT_DEFINITION(UART1_RX_IRQHandler, 18);
+#endif // STM8S208 or STM8S207 or STM8S103 or STM8S903 or STM8AF62Ax or STM8AF52Ax
+
+// I2C Interrupt
+INTERRUPT_DEFINITION(I2C_IRQHandler, 19);
+
+#if defined(STM8S105) || defined(STM8S005) ||  defined (STM8AF626x)
+// UART2 TX interrupt
+INTERRUPT_DEFINITION(UART2_TX_IRQHandler, 20);
+
+// UART2 RX interrupt
+INTERRUPT_DEFINITION(UART2_RX_IRQHandler, 21);
+#endif // STM8S105 or STM8AF626x
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+// UART3 TX interrupt
+INTERRUPT_DEFINITION(UART3_TX_IRQHandler, 20);
+
+// UART3 RX interrupt
+INTERRUPT_DEFINITION(UART3_RX_IRQHandler, 21);
+#endif // STM8S208 or STM8S207 or STM8AF52Ax or STM8AF62Ax
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+// ADC2 interrupt
+INTERRUPT_DEFINITION(ADC2_IRQHandler, 22);
+#else // STM8S105, STM8S103 or STM8S903 or STM8AF626x
+// ADC1 interrupt
+INTERRUPT_DEFINITION(ADC1_IRQHandler, 22);
+#endif // STM8S208 or STM8S207 or STM8AF52Ax or STM8AF62Ax
+
+#ifdef STM8S903
+// Timer6 Update/Overflow/Trigger Interrupt
+INTERRUPT_DEFINITION(TIM6_UPD_OVF_TRG_IRQHandler, 23);
+#else // STM8S208, STM8S207, STM8S105 or STM8S103 or STM8AF52Ax or STM8AF62Ax or STM8AF626x
+// Timer4 Update/Overflow Interrupt
+INTERRUPT_DEFINITION(TIM4_UPD_OVF_IRQHandler, 23);
+#endif // STM8S903
+
+// Eeprom EEC Interrupt
+INTERRUPT_DEFINITION(EEPROM_EEC_IRQHandler, 24);
+
+#endif // __INTERRUPTS_H__
diff --git a/STM8/main.c b/STM8/main.c
new file mode 100644
index 0000000..9db3185
--- /dev/null
+++ b/STM8/main.c
@@ -0,0 +1,142 @@
+/*
+ * blinky.c
+ *
+ * Copyright 2014 Edward V. Emelianoff <eddy@sao.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include "ports_definition.h"
+#include "interrupts.h"
+#include "stepper.h"
+#include "uart.h"
+#include "proto.h"
+
+//U32 Global_time = 0L; // global time in ms
+
+/*
+ * 0 0000
+ * 1 0001
+ * 2 0010
+ * 3 0011
+ * 4 0100
+ * 5 0101
+ * 6 0110
+ * 7 0111
+ * 8 1000
+ * 9 1001
+ *10 1010
+ *11 1011
+ *12 1100
+ *13 1101
+ *14 1110
+ *15 1111
+ */
+// microsteps: DCBA = 1000, 1100, 0100, 0110, 0010, 0011, 0001, 1001 -- for ULN
+// what a shit is this > DCBA = 0001, 0010, 0110, 1010, 1001, 1000, 0100, 0000  - bipolar
+// 1000, 1010, 0010, 0110, 0100, 0101, 0001, 1001 - half-step
+// 1010, 0110, 0101, 1001 - full step
+//const U8 ustepsUNI[8] = {8, 12, 4, 6, 2, 3, 1, 9}; // ULN - unipolar
+//const U8 ustepsBIP[8] = {8, 10, 2, 6, 4, 5, 1, 9}; // bipolar
+// current usteps
+//U8 const *usteps = ustepsUNI;
+
+int main() {
+    //unsigned long T = 0L;
+    // int Ival;
+    // U8 rb;
+    CLK_ICKR |= 8; // enable LSI for watchdog
+    CFG_GCR |= 1; // disable SWIM
+    // Configure clocking
+    CLK_CKDIVR = 0; // F_HSI = 16MHz, f_CPU = 16MHz
+
+
+    PORT(LEDS_PORT, DDR) |= LEDS_PINS;
+    PORT(LEDS_PORT, CR1) |= LEDS_PINS;
+    PORT(LEDS_PORT, CR2) |= LEDS_PINS;
+
+    // Configure timer 1 - LEDs
+    // prescaler = f_{in}/f_{tim1} - 1
+    // set Timer1 to 1MHz: 1/1 - 1 = 15
+    TIM1_PSCRH = 0;
+    TIM1_PSCRL = 15; // LSB should be written last as it updates prescaler
+    // auto-reload each 256ticks:
+    TIM1_ARRH = 0x0;
+    TIM1_ARRL = 0xFF;
+    TIM1_CCR1H = 0;
+    TIM1_CCR1L = 20;
+    TIM1_CCR2H = 0;
+    TIM1_CCR2L = 20;
+    TIM1_CCR3H = 0;
+    TIM1_CCR3L = 20;
+
+    // interrupts: none
+    // PWM mode 1 - OC1M = 110
+    TIM1_CCMR1 = 0x60; TIM1_CCMR2 = 0x60; TIM1_CCMR3 = 0x60;
+    TIM1_CCER1 = 0x11; // CC1E, CC2E
+    TIM1_CCER2 = 0x01; // CC3E
+    // auto-reload + enable
+    TIM1_CR1 = TIM_CR1_APRE | TIM_CR1_CEN;
+    TIM1_BKR |= 1<<7; // MOE - enable main output
+
+    // Configure pins
+    // PD5 - UART2_TX
+    PORT(UART_PORT, DDR) |= UART_TX_PIN;
+    PORT(UART_PORT, CR1) |= UART_TX_PIN;
+    PORT(UART_PORT, CR2) |= UART_TX_PIN;
+
+    // Configure UART
+    // 8 bit, no parity, 1 stop (UART_CR1/3 = 0 - reset value)
+    // 9600 on 16MHz: BRR1=0x41, BRR2=0x02
+    UART2_BRR2 = 0x03; UART2_BRR1 = 0x68;
+    UART2_CR2 = UART_CR2_TEN | UART_CR2_REN | UART_CR2_RIEN; // Allow RX/TX, generate ints on rx//tx
+
+    Stepper_speed = 1000;
+    // Configure timer 2 to generate signals for CLK
+    TIM2_PSCR = 4; // 1MHz
+    TIM2_ARRH = 1000 >> 8; // set speed
+    TIM2_ARRL = 1000 & 0xff;
+    TIM2_IER = TIM_IER_UIE; // update interrupt enable
+    TIM2_CR1 |= TIM_CR1_APRE | TIM_CR1_URS; // auto reload + interrupt on overflow
+
+    setup_stepper_pins();
+    RELAY_SETUP();
+
+    // enable all interrupts
+    enableInterrupts();
+
+/*
+    // Setup watchdog
+    IWDG_KR = KEY_ACCESS; // enable access to protected registers
+    IWDG_PR = 6; // /256
+    IWDG_RLR = 0xff; // max time for watchdog (1.02s)
+    IWDG_KR = KEY_ENABLE; // start watchdog
+*/
+    // Loop
+    do{
+        //if(RST_SR) RST_SR = 0x1f; // clear reset flags writing 1
+        //IWDG_KR = KEY_REFRESH; // refresh watchdog
+        if(uart_rdy){
+            process_string();
+        }
+        if(chk_esw){
+            chk_esw = 0;
+            stepper_get_esw(cur_motor);
+        }
+    }while(1);
+}
+
+
diff --git a/STM8/ports_definition.h b/STM8/ports_definition.h
new file mode 100644
index 0000000..9e6a81b
--- /dev/null
+++ b/STM8/ports_definition.h
@@ -0,0 +1,78 @@
+/*
+ * ports_definition.h - definition of ports pins & so on
+ *
+ * Copyright 2014 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#pragma once
+#ifndef __PORTS_DEFINITION_H__
+#define __PORTS_DEFINITION_H__
+
+#include "stm8l.h"
+
+#ifdef EBUG
+    #define DBG(x) uart_write(x)
+#else
+    #define DBG(x)
+#endif
+
+// macro for using in port constructions like PORT(LED_PORT, ODR) = xx
+#define CONCAT(a, b)    a ## _ ## b
+#define PORT(a, b)      CONCAT(a , b)
+
+
+// UART2_TX
+#define UART_PORT       PD
+#define UART_TX_PIN     GPIO_PIN5
+
+/****** Relays: B4, B5, F4 ******/
+#define RELAY_SETUP() do{PB_DDR |= 0x30; PB_CR1 |= 0x30; PF_DDR |= 0x10; PF_CR1 |= 0x10;}while(0)
+#define RELAYS_OFF()  do{PB_ODR &= ~0x30; PF_ODR |= ~0x10;}while(0)
+#define RELAY1_ON()   do{PB_ODR |= 0x10;}while(0)
+#define RELAY1_OFF()  do{PB_ODR &= ~0x10;}while(0)
+#define RELAY2_ON()   do{PB_ODR |= 0x20;}while(0)
+#define RELAY2_OFF()  do{PB_ODR &= ~0x20;}while(0)
+#define RELAY3_ON()   do{PF_ODR |= 0x10;}while(0)
+#define RELAY3_OFF()  do{PF_ODR &= ~0x10;}while(0)
+#define RELAY_1()     (PB_ODR & 0x10)
+#define RELAY_2()     (PB_ODR & 0x20)
+#define RELAY_3()     (PF_ODR & 0x10)
+
+
+/***** LEDs (C1..C3) *****/
+#define LEDS_PORT       PC
+#define LEDS_PINS       0x0E
+
+/***** Stepper motor *****/
+// Clocking
+// PB0..3 -- pins A..D of stepper
+#define STP_PORT        PB
+#define STP_PINS        0x0f
+
+// PD0..PD4 - select pair 0..2 & stepper
+#define STP_SEL_PORT  PD
+#define STP_SEL_PINS  0x1f
+
+#define STPRS_OFF()  do{PORT(STP_PORT, ODR) &= ~STP_PINS; PORT(STP_SEL_PORT, ODR) &= ~0x07; PORT(STP_SEL_PORT, ODR) |= 0x18; }while(0)
+
+#define ESW_PORT    PA
+// PA1 - "-", PA2 - "+"
+#define ESW_PLUS    0x02
+#define ESW_MINUS   0x04
+
+#endif // __PORTS_DEFINITION_H__
diff --git a/STM8/proto.c b/STM8/proto.c
new file mode 100644
index 0000000..b118fe9
--- /dev/null
+++ b/STM8/proto.c
@@ -0,0 +1,217 @@
+/*
+ *                                                                                                  geany_encoding=koi8-r
+ * proto.c - base protocol definitions
+ *
+ * Copyright 2017 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+
+#include "ports_definition.h"
+#include "uart.h"
+#include "stepper.h"
+
+/**
+ * Move motor for given amount of steps, cmd should be 'N nnnn any other symbols',
+ * N - motor number,
+ * nnnn - steps (-32768...32768)
+ * @return 1 if all OK
+ */
+U8 move_motor(char *cmd){
+    U8 N = (U8)*cmd - '0';
+    int steps;
+    if(N < 1 || N > 6) return 0;
+    cmd = omit_whitespace(cmd+1);
+    if(!readInt(cmd, &steps)) return 0;
+    #ifdef EBUG
+    uart_write("Move motor ");
+    printUint((U8*)&N, 1);
+    uart_write(" for ");
+    print_long((long)steps);
+    uart_write("steps\n");
+    #endif
+
+    if(steps) return stepper_move(N, steps);
+    else{ // steps == 0 - just check endswitches
+        stepper_get_esw(N);
+        return 0;
+    }
+}
+
+/**
+ * Switch relay on/off depending on cmd value
+ * 1 - on, 0 - off
+ * @param N - second symbol of command ([2 N ...])
+ */
+U8 relay(char *cmd, char N){
+    U8 on = 0;
+    if(*cmd == '-'){ // just check
+        char ans[] = "[2 N St=1]\n";
+        ans[3] = N;
+        switch (N){
+            case '7':
+                on = RELAY_1();
+            break;
+            case '8':
+                on = RELAY_2();
+            break;
+            case '9':
+                on = RELAY_3();
+            break;
+            default:
+            return 0;
+        }
+        if(!on) ans[8] = '0'; // off
+        uart_write(ans);
+        return 1;
+    }
+    if(*cmd == '0'){ // turn OFF
+        switch (N){
+            case '7':
+                RELAY1_OFF();
+            break;
+            case '8':
+                RELAY2_OFF();
+            break;
+            case '9':
+                RELAY3_OFF();
+            break;
+            default:
+            return 0;
+        }
+        return 1;
+    }
+    if(*cmd == '1'){ // turn ON
+        switch (N){
+            case '7':
+                RELAY1_ON();
+            break;
+            case '8':
+                RELAY2_ON();
+            break;
+            case '9':
+                RELAY3_ON();
+            break;
+            default:
+            return 0;
+        }
+        return 1;
+    }
+    return 0;
+}
+
+//extern void print_time();
+
+void LEDshine(char *cmd, U8 N){
+    int s;
+    if(!readInt(cmd, &s)) return;
+    if(s < 0 || s > 255) return;
+    switch (N){
+        case 0:
+            TIM1_CCR1L = s;
+        break;
+        case 1:
+            TIM1_CCR2L = s;
+        break;
+        case 2:
+            TIM1_CCR3L = s;
+        break;
+        default:
+        return;
+    }
+}
+
+/**
+ * process commands from user buffer
+ * @return 1 if all OK
+ */
+U8 process_commands(char *cmd){
+    char s;
+    cmd = omit_whitespace(cmd + 1);
+    if(*cmd > '0' && *cmd < '7')
+        return move_motor(cmd);
+    s = *cmd;
+    cmd = omit_whitespace(cmd + 1);
+    switch(s){
+        case '?':
+            uart_write("Steps_left=");
+            print_long((long) Steps_left);
+            uart_write("\n");
+        break;
+        case '0': // stop motors
+            DBG("restart");
+            stop_motor();
+            RELAYS_OFF();
+        break;
+        case '7':
+            DBG("Shutter");
+            relay(cmd, '7');
+        break;
+        case '8':
+            DBG("Neon");
+            relay(cmd, '8');
+        break;
+        case '9':
+            DBG("Flat");
+            relay(cmd, '9');
+        break;
+        case 'a':
+            return stepper_ch_speed(cmd);
+        break;
+        case 'b':
+            DBG("LED1");
+            LEDshine(cmd, 0);
+        break;
+        case 'c':
+            DBG("LED2");
+            LEDshine(cmd, 1);
+        break;
+        case 'd':
+            DBG("LED3");
+            LEDshine(cmd, 2);
+        break;
+        default:
+            return 0;
+    }
+    DBG("\n");
+    return 1;
+}
+
+void process_string(){
+    U8 rbs, noerr=1;
+    char *cmd;
+    if(uart_rdy == 0) return;
+    uart_rdy = 0;
+    if(rx_idx < 3 || UART_rx[0] != '[' || UART_rx[rx_idx - 2] != ']'){
+        if(!chk_stpr_cmd(UART_rx[0])){
+            DBG("Enter \"[cmd]\"\n");
+        }
+        //if(rx_buffer[0] == 't'){ print_time(); return; }
+        rx_idx = 0;
+        noerr = 0;
+    }
+    if(noerr){ // echo back given string
+        UART_rx[rx_idx] = 0;
+        cmd = omit_whitespace(&UART_rx[1]);
+        if(*cmd != '2') return;
+        rbs = rx_idx;
+        rx_idx = 0;
+        uart_write(UART_rx);
+        UART_rx[rbs - 2] = 0;
+        process_commands(cmd);
+    }
+}
diff --git a/proto.h b/STM8/proto.h
similarity index 100%
rename from proto.h
rename to STM8/proto.h
diff --git a/STM8/sco_platform.ihx b/STM8/sco_platform.ihx
new file mode 100644
index 0000000..3986c27
--- /dev/null
+++ b/STM8/sco_platform.ihx
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diff --git a/STM8/stepper.c b/STM8/stepper.c
new file mode 100644
index 0000000..b44b26c
--- /dev/null
+++ b/STM8/stepper.c
@@ -0,0 +1,171 @@
+/*
+ * stepper.c
+ *
+ * Copyright 2014 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include "ports_definition.h"
+#include "uart.h"
+#include "stepper.h"
+
+volatile U8 chk_esw = 0; // need 2 check end-switches
+
+static const U8 usteps_matrix[8][8] = {
+    {0b1000, 0b1100, 0b0100, 0b0110, 0b0010, 0b0011, 0b0001, 0b1001}, // [1234]
+    {0b0010, 0b0110, 0b0100, 0b1100, 0b1000, 0b1001, 0b0001, 0b0011}, // [3214]
+    {0b1000, 0b1001, 0b0001, 0b0011, 0b0010, 0b0110, 0b0100, 0b1100}, // [1432]
+    {0b1000, 0b1010, 0b0010, 0b0110, 0b0100, 0b0101, 0b0001, 0b1001}, // [1324]
+    // inversion: cat | sed -e 's/0b/x/g' -e 's/0/y/g' -e 's/1/0/g' -e 's/y/1/g' -e s'/x/0b/g'
+    {0b0111, 0b0011, 0b1011, 0b1001, 0b1101, 0b1100, 0b1110, 0b0110}, // [1234]
+    {0b1101, 0b1001, 0b1011, 0b0011, 0b0111, 0b0110, 0b1110, 0b1100}, // [3214]
+    {0b0111, 0b0110, 0b1110, 0b1100, 0b1101, 0b1001, 0b1011, 0b0011}, // [1432]
+    {0b0111, 0b0101, 0b1101, 0b1001, 0b1011, 0b1010, 0b1110, 0b0110}, // [1324]
+};
+
+volatile int Steps_left = 0;  // Number of steps
+volatile char Dir = 0;     // direction of moving: 0/1
+U16 Stepper_speed = 0;     // length of one MICROstep in us
+U8 *usteps = &usteps_matrix[0][0];
+U8 cur_motor = 7;
+/**
+ * Setup pins of stepper motor (all - PP out)
+ */
+void setup_stepper_pins(){
+    // Push-pull for outputs
+    // PB0..3
+    PORT(STP_PORT, DDR) |= STP_PINS;
+    PORT(STP_PORT, CR1) |= STP_PINS;
+    PORT(STP_PORT, CR2) |= STP_PINS;
+    // PD0..4
+    PORT(STP_SEL_PORT, DDR) |= STP_SEL_PINS;
+    PORT(STP_SEL_PORT, CR1) |= STP_SEL_PINS;
+    PORT(STP_SEL_PORT, CR2) |= STP_SEL_PINS;
+
+    STPRS_OFF();
+}
+
+U8 stepper_ch_speed(char *spd){
+    int newval;
+    if(readInt(spd, &newval)){
+        if(newval > -9 && newval < 0x7fff){
+            U16 O = 0xffff / (newval + 10);
+            if(O < MIN_STEP_LENGTH) return 0;
+            Stepper_speed = O;
+            // Configure timer 2 to generate signals for CLK
+            TIM2_PSCR = 4; // 1MHz
+            TIM2_ARRH = O >> 8; // set speed
+            TIM2_ARRL = O & 0xff;
+            TIM2_IER = TIM_IER_UIE; // update interrupt enable
+            TIM2_CR1 |= TIM_CR1_APRE | TIM_CR1_URS; // auto reload + interrupt on overflow & RUN
+            #ifdef EBUG
+            uart_write("Speed changed to ");
+            printUint((U8*)&O, 2);
+            uart_write("\n");
+            #endif
+            return 1;
+        }else DBG("Bad speed value\n");
+    }
+    return 0;
+}
+
+/**
+ * Check endswitches
+ * @return 0 if none pressed, 1 if "-", 2 if "+"
+ */
+U8 check_endsw(){
+    // A1 - "-", A2 - "+"
+    U8 pc = PORT(ESW_PORT, IDR);
+    if(0 == (pc & ESW_MINUS)) return 1;
+    if(0 == (pc & ESW_PLUS)) return 2;
+    return 0;
+}
+
+/**
+ * move stepper number Nmotor by Nsteps steps
+ * @return  1 if all OK, 0 if error occured
+ */
+U8 stepper_move(U8 Nmotor, int Nsteps){
+    U8 c;
+    if(!Nmotor || Nmotor > 6 || !Nsteps || Steps_left) return 0;
+
+    if(Nsteps < 0){
+        Dir = 1;
+        Nsteps *= -1;
+    }else
+        Dir = 0;
+    Steps_left = Nsteps;
+    STPRS_OFF();
+
+    // turn all OFF
+    // turn on the motor we need
+    PORT(STP_SEL_PORT, ODR) |= (1 << (Nmotor/2));
+    if(Nmotor & 1) PORT(STP_SEL_PORT, ODR) &= ~GPIO_PIN3;
+    else PORT(STP_SEL_PORT, ODR) &= ~GPIO_PIN4;
+    c = check_endsw();
+    cur_motor = Nmotor;
+    if(c){
+        if(c == 1){if(!Dir) c = 0;}
+        else if(Dir) c = 0;
+    }
+    if(c){
+        stop_motor();
+        return 0; // already at end-switch in given direction
+    }
+    DBG("stepper_move\n");
+    TIM2_CR1 |= TIM_CR1_CEN; // turn on timer
+    return 1;
+}
+
+void stop_motor(){
+    TIM2_CR1 &= ~TIM_CR1_CEN; // Turn off timer
+    Steps_left = 0;
+    chk_esw = 1;
+    DBG("stop\n");
+}
+
+/**
+ * User can change current stepper phases table
+ * N - position in table from 'a' (0) to 'h' (7)
+ * return 1 if all OK
+ */
+U8 chk_stpr_cmd(char N){
+    if(N < 'a' || N > 'h') return 0;
+    usteps = &usteps_matrix[N-'a'][0];
+    return 1;
+}
+
+/**
+ * get end-switches state for all motors or only Nth
+ * @param Nmotor - number of given motor
+ */
+void stepper_get_esw(U8 Nmotor){
+    U8 sw;
+    char str[] = "[2 0 St=0]\n"; // 3 - motor number, 5 - endswitch (3 if none)
+    if(Nmotor == 0 || Nmotor > 7) return; // no running motor
+    STPRS_OFF();
+    PORT(STP_SEL_PORT, ODR) |= (1 << (Nmotor/2));
+    if(Nmotor & 1) PORT(STP_SEL_PORT, ODR) |= 1<<4;
+    else PORT(STP_SEL_PORT, ODR) |= 1<<5;
+    str[3] = Nmotor + '0';
+    sw = check_endsw();
+    if(sw == 0) sw = 3;
+    str[8] = sw + '0';
+    uart_write(str);
+    STPRS_OFF();
+    cur_motor = 7;
+}
diff --git a/STM8/stepper.h b/STM8/stepper.h
new file mode 100644
index 0000000..dbd8e61
--- /dev/null
+++ b/STM8/stepper.h
@@ -0,0 +1,48 @@
+/*
+ * stepper.h
+ *
+ * Copyright 2014 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#pragma once
+#ifndef __STEPPER_H__
+#define __STEPPER_H__
+
+#include "ports_definition.h"
+
+#define MIN_STEP_LENGTH 125     // max speed == 1/(125us*16) = 500 steps per second
+
+extern volatile U8 chk_esw;
+extern U8 cur_motor;
+
+extern volatile int Steps_left;
+extern U16 Stepper_speed;
+extern volatile char Dir;
+extern U8 *usteps;
+
+void setup_stepper_pins();
+U8 stepper_ch_speed(char *spd);
+U8 stepper_move(U8 Nmotor, int Nsteps);
+
+void stop_motor();
+U8 check_endsw();
+void stepper_get_esw(U8 Nmotor);
+
+U8 chk_stpr_cmd(char N);
+
+#endif // __STEPPER_H__
diff --git a/STM8/stm8l.h b/STM8/stm8l.h
new file mode 100644
index 0000000..82057bb
--- /dev/null
+++ b/STM8/stm8l.h
@@ -0,0 +1,567 @@
+/*
+ * stm8l.h
+ *
+ * Copyright 2014 Edward V. Emelianoff <eddy@sao.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+
+#pragma once
+#ifndef __STM8L_H__
+#define __STM8L_H__
+
+typedef unsigned char U8;
+typedef unsigned int U16;
+typedef unsigned long U32;
+#define NULL (void*)0
+
+/* functions */
+#define enableInterrupts()    {__asm__("rim\n");}    // enable interrupts
+#define disableInterrupts()   {__asm__("sim\n");}    // disable interrupts
+#define iret()                {__asm__("iret\n");}   // Interrupt routine return
+#define pop_ccr()             {__asm__("pop cc\n");} // Pop CCR from the stack
+#define push_ccr()            {__asm__("push cc\n");}// Push CCR on the stack
+#define rim()                 {__asm__("rim\n");}    // enable interrupts
+#define sim()                 {__asm__("sim\n");}    // disable interrupts
+#define nop()                 {__asm__("nop\n");}    // No Operation
+#define trap()                {__asm__("trap\n");}   // Trap (soft IT)
+#define wfi()                 {__asm__("wfi\n");}    // Wait For Interrupt
+#define halt()                {__asm__("halt\n");}   // Halt
+
+/*
+ * Registers map is shown in short datasheet, page 26
+ */
+/* GPIO */
+#define PA_ODR *(unsigned char*)0x5000
+#define PA_IDR *(unsigned char*)0x5001
+#define PA_DDR *(unsigned char*)0x5002
+#define PA_CR1 *(unsigned char*)0x5003
+#define PA_CR2 *(unsigned char*)0x5004
+
+#define PB_ODR *(unsigned char*)0x5005
+#define PB_IDR *(unsigned char*)0x5006
+#define PB_DDR *(unsigned char*)0x5007
+#define PB_CR1 *(unsigned char*)0x5008
+#define PB_CR2 *(unsigned char*)0x5009
+
+#define PC_ODR *(unsigned char*)0x500A
+#define PC_IDR *(unsigned char*)0x500B
+#define PC_DDR *(unsigned char*)0x500C
+#define PC_CR1 *(unsigned char*)0x500D
+#define PC_CR2 *(unsigned char*)0x500E
+
+#define PD_ODR *(unsigned char*)0x500F
+#define PD_IDR *(unsigned char*)0x5010
+#define PD_DDR *(unsigned char*)0x5011
+#define PD_CR1 *(unsigned char*)0x5012
+#define PD_CR2 *(unsigned char*)0x5013
+
+#define PE_ODR *(unsigned char*)0x5014
+#define PE_IDR *(unsigned char*)0x5015
+#define PE_DDR *(unsigned char*)0x5016
+#define PE_CR1 *(unsigned char*)0x5017
+#define PE_CR2 *(unsigned char*)0x5018
+
+#define PF_ODR *(unsigned char*)0x5019
+#define PF_IDR *(unsigned char*)0x501A
+#define PF_DDR *(unsigned char*)0x501B
+#define PF_CR1 *(unsigned char*)0x501C
+#define PF_CR2 *(unsigned char*)0x501D
+
+#ifdef STM8S105
+#define PG_ODR *(unsigned char*)0x501E
+#define PG_IDR *(unsigned char*)0x501F
+#define PG_DDR *(unsigned char*)0x5020
+#define PG_CR1 *(unsigned char*)0x5021
+#define PG_CR2 *(unsigned char*)0x5022
+
+#define PH_ODR *(unsigned char*)0x5023
+#define PH_IDR *(unsigned char*)0x5024
+#define PH_DDR *(unsigned char*)0x5025
+#define PH_CR1 *(unsigned char*)0x5026
+#define PH_CR2 *(unsigned char*)0x5027
+
+#define PI_ODR *(unsigned char*)0x5028
+#define PI_IDR *(unsigned char*)0x5029
+#define PI_DDR *(unsigned char*)0x502A
+#define PI_CR1 *(unsigned char*)0x502B
+#define PI_CR2 *(unsigned char*)0x502C
+#endif // STM8S105
+
+/* GPIO bits */
+#define GPIO_PIN0       (1 << 0)
+#define GPIO_PIN1       (1 << 1)
+#define GPIO_PIN2       (1 << 2)
+#define GPIO_PIN3       (1 << 3)
+#define GPIO_PIN4       (1 << 4)
+#define GPIO_PIN5       (1 << 5)
+#define GPIO_PIN6       (1 << 6)
+#define GPIO_PIN7       (1 << 7)
+
+/* -------------------- FLASH/EEPROM -------------------- */
+#define FLASH_CR1   *(unsigned char*)0x505A
+#define FLASH_CR2   *(unsigned char*)0x505B
+#define FLASH_NCR2  *(unsigned char*)0x505C
+#define FLASH_FPR   *(unsigned char*)0x505D
+#define FLASH_NFPR  *(unsigned char*)0x505E
+#define FLASH_IAPSR *(unsigned char*)0x505F
+#define FLASH_PUKR  *(unsigned char*)0x5062 // progmem unprotection
+#define FLASH_DUKR  *(unsigned char*)0x5064 // EEPROM unprotection
+
+#define EEPROM_KEY1     0xAE  // keys to manage EEPROM's write access
+#define EEPROM_KEY2     0x56
+#define EEPROM_START_ADDR  (unsigned char*)0x4000
+
+/* ------------------- interrupts ------------------- */
+#define EXTI_CR1    *(unsigned char*)0x50A0
+#define EXTI_CR2    *(unsigned char*)0x50A1
+#define INTERRUPT_HANDLER(fn, num)      void fn() __interrupt(num)
+#define INTERRUPT_DEFINITION(fn, num)   extern void fn() __interrupt(num)
+
+// Reset status register
+#define RST_SR      *(unsigned char*)0x50B3
+
+/* ------------------- CLOCK ------------------- */
+#define CLK_ICKR        *(unsigned char*)0x50C0
+#define CLK_ECKR        *(unsigned char*)0x50C1
+#define CLK_CMSR        *(unsigned char*)0x50C3
+#define CLK_SWR         *(unsigned char*)0x50C4
+#define CLK_SWCR        *(unsigned char*)0x50C5
+#define CLK_CKDIVR      *(unsigned char*)0x50C6
+#define CLK_SPCKENR1    *(unsigned char*)0x50C7
+#define CLK_CSSR        *(unsigned char*)0x50C8
+#define CLK_CCOR        *(unsigned char*)0x50C9
+#define CLK_PCKENR2     *(unsigned char*)0x50CA
+#define CLK_HSITRIMR    *(unsigned char*)0x50CC
+#define CLK_SWIMCCR     *(unsigned char*)0x50CD
+
+/* ------------------- Watchdog ------------------ */
+#define WWDG_CR         *(unsigned char*)0x50D1
+#define WWDG_WR         *(unsigned char*)0x50D2
+#define IWDG_KR         *(unsigned char*)0x50E0
+#define IWDG_PR         *(unsigned char*)0x50E1
+#define IWDG_RLR        *(unsigned char*)0x50E2
+// enable Watchdog
+#define KEY_ENABLE      (0xCC)
+// refresh Watchdog from IWDG_RLR
+#define KEY_REFRESH     (0xAA)
+// modify IWDG_PR and IWDG_RLR
+#define KEY_ACCESS      (0x55)
+
+/* ------------------- AWU, BEEP ------------------- */
+#define AWU_CSR1        *(unsigned char*)0x50F0
+#define AWU_APR         *(unsigned char*)0x50F1
+#define AWU_TBR         *(unsigned char*)0x50F2
+#define BEEP_CSR        *(unsigned char*)0x50F3
+
+/* ------------------- SPI ------------------- */
+#define SPI_CR1         *(unsigned char*)0x5200
+#define SPI_CR2         *(unsigned char*)0x5201
+#define SPI_ICR         *(unsigned char*)0x5202
+#define SPI_SR          *(unsigned char*)0x5203
+#define SPI_DR          *(unsigned char*)0x5204
+#define SPI_CRCPR       *(unsigned char*)0x5205
+#define SPI_RXCRCR      *(unsigned char*)0x5206
+#define SPI_TXCRCR      *(unsigned char*)0x5207
+// SPI_CR1 (page 271): | LSBFIRST | SPE | BR[2:0] | MSTR | CPOL | CPHA |
+#define SPI_CR1_LSBFIRST (1<<7)
+#define SPI_CR1_SPE      (1<<6)
+#define SPI_CR1_BRMASK   (0x38)
+#define SPI_CR1_MSTR     (1<<2)
+#define SPI_CR1_CPOL     (1<<1)
+#define SPI_CR1_CPHA     (1)
+// SPI_CR2 (page 272): | BDM | BDOE | CRCEN | CRCNEXT | - | RXONLY | SSM | SSI |
+#define SPI_CR2_BDM      (1<<7)
+#define SPI_CR2_BDOE     (1<<6)
+#define SPI_CR2_CRCEN    (1<<5)
+#define SPI_CR2_CRCNEXT  (1<<4)
+#define SPI_CR2_RXONLY   (1<<2)
+#define SPI_CR2_SSM      (1<<1)
+#define SPI_CR2_SSI      (1)
+// SPI_ICR (page 273): | TXIE | RXIE | ERRIE | WKIE | - | - | - | - |
+#define SPI_ICR_TXIE     (1<<7)
+#define SPI_ICR_RXIE     (1<<6)
+#define SPI_ICR_ERRIE    (1<<5)
+#define SPI_ICR_WKIE     (1<<4)
+// SPI_SR (page 274):  | BSY | OVR | MODF | CRCERR | WKUP | - | TXE | RXNE |
+#define SPI_SR_BSY       (1<<7)
+#define SPI_SR_OVR       (1<<6)
+#define SPI_SR_MODF      (1<<5)
+#define SPI_SR_CRCERR    (1<<4)
+#define SPI_SR_WKUP      (1<<3)
+#define SPI_SR_TXE       (1<<1)
+#define SPI_SR_RXNE      (1)
+
+/* ------------------- I2C ------------------- */
+#define I2C_CR1         *(unsigned char*)0x5210
+#define I2C_CR2         *(unsigned char*)0x5211
+#define I2C_FREQR       *(unsigned char*)0x5212
+#define I2C_OARL        *(unsigned char*)0x5213
+#define I2C_OARH        *(unsigned char*)0x5214
+#define I2C_DR          *(unsigned char*)0x5216
+#define I2C_SR1         *(unsigned char*)0x5217
+#define I2C_SR2         *(unsigned char*)0x5218
+#define I2C_SR3         *(unsigned char*)0x5219
+#define I2C_ITR         *(unsigned char*)0x521A
+#define I2C_CCRL        *(unsigned char*)0x521B
+#define I2C_CCRH        *(unsigned char*)0x521C
+#define I2C_TRISER      *(unsigned char*)0x521D
+#define I2C_PECR        *(unsigned char*)0x521E
+
+/* ------------------- UART ------------------- */
+#ifdef STM8S003
+#define UART1_SR    *(unsigned char*)0x5230
+#define UART1_DR    *(unsigned char*)0x5231
+#define UART1_BRR1  *(unsigned char*)0x5232
+#define UART1_BRR2  *(unsigned char*)0x5233
+#define UART1_CR1   *(unsigned char*)0x5234
+#define UART1_CR2   *(unsigned char*)0x5235
+#define UART1_CR3   *(unsigned char*)0x5236
+#define UART1_CR4   *(unsigned char*)0x5237
+#define UART1_CR5   *(unsigned char*)0x5238
+#define UART1_GTR   *(unsigned char*)0x5239
+#define UART1_PSCR  *(unsigned char*)0x523A
+#endif // STM8S003
+#ifdef STM8S105
+#define UART2_SR    *(unsigned char*)0x5240
+#define UART2_DR    *(unsigned char*)0x5241
+#define UART2_BRR1  *(unsigned char*)0x5242
+#define UART2_BRR2  *(unsigned char*)0x5243
+#define UART2_CR1   *(unsigned char*)0x5244
+#define UART2_CR2   *(unsigned char*)0x5245
+#define UART2_CR3   *(unsigned char*)0x5246
+#define UART2_CR4   *(unsigned char*)0x5247
+#define UART2_CR5   *(unsigned char*)0x5248
+#define UART2_CR6   *(unsigned char*)0x5249
+#define UART2_GTR   *(unsigned char*)0x524A
+#define UART2_PSCR  *(unsigned char*)0x524B
+#endif // STM8S105
+
+/* UART_CR1 bits */
+#define UART_CR1_R8 (1 << 7)
+#define UART_CR1_T8 (1 << 6)
+#define UART_CR1_UARTD (1 << 5)
+#define UART_CR1_M (1 << 4)
+#define UART_CR1_WAKE (1 << 3)
+#define UART_CR1_PCEN (1 << 2)
+#define UART_CR1_PS (1 << 1)
+#define UART_CR1_PIEN (1 << 0)
+
+/* UART_CR2 bits */
+#define UART_CR2_TIEN (1 << 7)
+#define UART_CR2_TCIEN (1 << 6)
+#define UART_CR2_RIEN (1 << 5)
+#define UART_CR2_ILIEN (1 << 4)
+#define UART_CR2_TEN (1 << 3)
+#define UART_CR2_REN (1 << 2)
+#define UART_CR2_RWU (1 << 1)
+#define UART_CR2_SBK (1 << 0)
+
+/* USART_CR3 bits */
+#define UART_CR3_LINEN (1 << 6)
+#define UART_CR3_STOP2 (1 << 5)
+#define UART_CR3_STOP1 (1 << 4)
+#define UART_CR3_CLKEN (1 << 3)
+#define UART_CR3_CPOL (1 << 2)
+#define UART_CR3_CPHA (1 << 1)
+#define UART_CR3_LBCL (1 << 0)
+
+/* UART_SR bits */
+#define UART_SR_TXE (1 << 7)
+#define UART_SR_TC (1 << 6)
+#define UART_SR_RXNE (1 << 5)
+#define UART_SR_IDLE (1 << 4)
+#define UART_SR_OR (1 << 3)
+#define UART_SR_NF (1 << 2)
+#define UART_SR_FE (1 << 1)
+#define UART_SR_PE (1 << 0)
+
+
+/* ------------------- TIMERS ------------------- */
+/* TIM1 */
+#define TIM1_CR1    *(unsigned char*)0x5250
+#define TIM1_CR2    *(unsigned char*)0x5251
+#define TIM1_SMCR   *(unsigned char*)0x5252
+#define TIM1_ETR    *(unsigned char*)0x5253
+#define TIM1_IER    *(unsigned char*)0x5254
+#define TIM1_SR1    *(unsigned char*)0x5255
+#define TIM1_SR2    *(unsigned char*)0x5256
+#define TIM1_EGR    *(unsigned char*)0x5257
+#define TIM1_CCMR1  *(unsigned char*)0x5258
+#define TIM1_CCMR2  *(unsigned char*)0x5259
+#define TIM1_CCMR3  *(unsigned char*)0x525A
+#define TIM1_CCMR4  *(unsigned char*)0x525B
+#define TIM1_CCER1  *(unsigned char*)0x525C
+#define TIM1_CCER2  *(unsigned char*)0x525D
+#define TIM1_CNTRH  *(unsigned char*)0x525E
+#define TIM1_CNTRL  *(unsigned char*)0x525F
+#define TIM1_PSCRH  *(unsigned char*)0x5260
+#define TIM1_PSCRL  *(unsigned char*)0x5261
+#define TIM1_ARRH   *(unsigned char*)0x5262
+#define TIM1_ARRL   *(unsigned char*)0x5263
+#define TIM1_RCR    *(unsigned char*)0x5264
+#define TIM1_CCR1H  *(unsigned char*)0x5265
+#define TIM1_CCR1L  *(unsigned char*)0x5266
+#define TIM1_CCR2H  *(unsigned char*)0x5267
+#define TIM1_CCR2L  *(unsigned char*)0x5268
+#define TIM1_CCR3H  *(unsigned char*)0x5269
+#define TIM1_CCR3L  *(unsigned char*)0x526A
+#define TIM1_CCR4H  *(unsigned char*)0x526B
+#define TIM1_CCR4L  *(unsigned char*)0x526C
+#define TIM1_BKR    *(unsigned char*)0x526D
+#define TIM1_DTR    *(unsigned char*)0x526E
+#define TIM1_OISR   *(unsigned char*)0x526F
+
+
+/* TIM_IER bits */
+#define TIM_IER_BIE (1 << 7)
+#define TIM_IER_TIE (1 << 6)
+#define TIM_IER_COMIE (1 << 5)
+#define TIM_IER_CC4IE (1 << 4)
+#define TIM_IER_CC3IE (1 << 3)
+#define TIM_IER_CC2IE (1 << 2)
+#define TIM_IER_CC1IE (1 << 1)
+#define TIM_IER_UIE (1 << 0)
+
+/* TIM_CR1 bits */
+#define TIM_CR1_APRE (1 << 7)
+#define TIM_CR1_CMSH (1 << 6)
+#define TIM_CR1_CMSL (1 << 5)
+#define TIM_CR1_DIR (1 << 4)
+#define TIM_CR1_OPM (1 << 3)
+#define TIM_CR1_URS (1 << 2)
+#define TIM_CR1_UDIS (1 << 1)
+#define TIM_CR1_CEN (1 << 0)
+
+/* TIM_SR1 bits */
+#define TIM_SR1_BIF (1 << 7)
+#define TIM_SR1_TIF (1 << 6)
+#define TIM_SR1_COMIF (1 << 5)
+#define TIM_SR1_CC4IF (1 << 4)
+#define TIM_SR1_CC3IF (1 << 3)
+#define TIM_SR1_CC2IF (1 << 2)
+#define TIM_SR1_CC1IF (1 << 1)
+#define TIM_SR1_UIF (1 << 0)
+
+/* TIM_EGR bits */
+#define TIM_EGR_BG (1 << 7)
+#define TIM_EGR_TG (1 << 6)
+#define TIM_EGR_COMG (1 << 5)
+#define TIM_EGR_CC4G (1 << 4)
+#define TIM_EGR_CC3G (1 << 3)
+#define TIM_EGR_CC2G (1 << 2)
+#define TIM_EGR_CC1G (1 << 1)
+#define TIM_EGR_UG (1 << 0)
+
+
+/* TIM2 */
+#define TIM2_CR1    *(unsigned char*)0x5300
+#if defined STM8S105 || defined STM8S103
+#define TIM2_IER    *(unsigned char*)0x5301
+#define TIM2_SR1    *(unsigned char*)0x5302
+#define TIM2_SR2    *(unsigned char*)0x5303
+#define TIM2_EGR    *(unsigned char*)0x5304
+#define TIM2_CCMR1  *(unsigned char*)0x5305
+#define TIM2_CCMR2  *(unsigned char*)0x5306
+#define TIM2_CCMR3  *(unsigned char*)0x5307
+#define TIM2_CCER1  *(unsigned char*)0x5308
+#define TIM2_CCER2  *(unsigned char*)0x5309
+#define TIM2_CNTRH  *(unsigned char*)0x530A
+#define TIM2_CNTRL  *(unsigned char*)0x530B
+#define TIM2_PSCR   *(unsigned char*)0x530C
+#define TIM2_ARRH   *(unsigned char*)0x530D
+#define TIM2_ARRL   *(unsigned char*)0x530E
+#define TIM2_CCR1H  *(unsigned char*)0x530F
+#define TIM2_CCR1L  *(unsigned char*)0x5310
+#define TIM2_CCR2H  *(unsigned char*)0x5311
+#define TIM2_CCR2L  *(unsigned char*)0x5312
+#define TIM2_CCR3H  *(unsigned char*)0x5313
+#define TIM2_CCR3L  *(unsigned char*)0x5314
+#elif defined STM8S003
+#define TIM2_IER    *(unsigned char*)0x5303
+#define TIM2_SR1    *(unsigned char*)0x5304
+#define TIM2_SR2    *(unsigned char*)0x5305
+#define TIM2_EGR    *(unsigned char*)0x5306
+#define TIM2_CCMR1  *(unsigned char*)0x5307
+#define TIM2_CCMR2  *(unsigned char*)0x5308
+#define TIM2_CCMR3  *(unsigned char*)0x5309
+#define TIM2_CCER1  *(unsigned char*)0x530A
+#define TIM2_CCER2  *(unsigned char*)0x530B
+#define TIM2_CNTRH  *(unsigned char*)0x530C
+#define TIM2_CNTRL  *(unsigned char*)0x530D
+#define TIM2_PSCR   *(unsigned char*)0x530E
+#define TIM2_ARRH   *(unsigned char*)0x530F
+#define TIM2_ARRL   *(unsigned char*)0x5310
+#define TIM2_CCR1H  *(unsigned char*)0x5311
+#define TIM2_CCR1L  *(unsigned char*)0x5312
+#define TIM2_CCR2H  *(unsigned char*)0x5313
+#define TIM2_CCR2L  *(unsigned char*)0x5314
+#define TIM2_CCR3H  *(unsigned char*)0x5315
+#define TIM2_CCR3L  *(unsigned char*)0x5316
+#endif
+
+
+/* TIM3 */
+#if defined STM8S105 || defined STM8S103
+#define TIM3_CR1    *(unsigned char*)0x5320
+#define TIM3_IER    *(unsigned char*)0x5321
+#define TIM3_SR1    *(unsigned char*)0x5322
+#define TIM3_SR2    *(unsigned char*)0x5323
+#define TIM3_EGR    *(unsigned char*)0x5324
+#define TIM3_CCMR1  *(unsigned char*)0x5325
+#define TIM3_CCMR2  *(unsigned char*)0x5326
+#define TIM3_CCER1  *(unsigned char*)0x5327
+#define TIM3_CNTRH  *(unsigned char*)0x5328
+#define TIM3_CNTRL  *(unsigned char*)0x5329
+#define TIM3_PSCR   *(unsigned char*)0x532A
+#define TIM3_ARRH   *(unsigned char*)0x532B
+#define TIM3_ARRL   *(unsigned char*)0x532C
+#define TIM3_CCR1H  *(unsigned char*)0x532D
+#define TIM3_CCR1L  *(unsigned char*)0x532E
+#define TIM3_CCR2H  *(unsigned char*)0x532F
+#define TIM3_CCR2L  *(unsigned char*)0x5330
+#endif
+
+/* TIM4 */
+#define TIM4_CR1    *(unsigned char*)0x5340
+#if defined STM8S105 || defined STM8S103
+#define TIM4_IER    *(unsigned char*)0x5341
+#define TIM4_SR     *(unsigned char*)0x5342
+#define TIM4_EGR    *(unsigned char*)0x5343
+#define TIM4_CNTR   *(unsigned char*)0x5344
+#define TIM4_PSCR   *(unsigned char*)0x5345
+#define TIM4_ARR    *(unsigned char*)0x5346
+#elif defined STM8S003
+#define TIM4_IER    *(unsigned char*)0x5343
+#define TIM4_SR     *(unsigned char*)0x5344
+#define TIM4_EGR    *(unsigned char*)0x5345
+#define TIM4_CNTR   *(unsigned char*)0x5346
+#define TIM4_PSCR   *(unsigned char*)0x5347
+#define TIM4_ARR    *(unsigned char*)0x5348
+#endif
+
+/* ------------------- ADC ------------------- */
+#define ADC_DB0RH   *(unsigned char*)0x53E0
+#define ADC_DB0RL   *(unsigned char*)0x53E1
+#define ADC_DB1RH   *(unsigned char*)0x53E2
+#define ADC_DB1RL   *(unsigned char*)0x53E3
+#define ADC_DB2RH   *(unsigned char*)0x53E4
+#define ADC_DB2RL   *(unsigned char*)0x53E5
+#define ADC_DB3RH   *(unsigned char*)0x53E6
+#define ADC_DB3RL   *(unsigned char*)0x53E7
+#define ADC_DB4RH   *(unsigned char*)0x53E8
+#define ADC_DB4RL   *(unsigned char*)0x53E9
+#define ADC_DB5RH   *(unsigned char*)0x53EA
+#define ADC_DB5RL   *(unsigned char*)0x53EB
+#define ADC_DB6RH   *(unsigned char*)0x53EC
+#define ADC_DB6RL   *(unsigned char*)0x53ED
+#define ADC_DB7RH   *(unsigned char*)0x53EE
+#define ADC_DB7RL   *(unsigned char*)0x53EF
+#define ADC_DB8RH   *(unsigned char*)0x53F0
+#define ADC_DB8RL   *(unsigned char*)0x53F1
+#define ADC_DB9RH   *(unsigned char*)0x53F2
+#define ADC_DB9RL   *(unsigned char*)0x53F3
+#define ADC_CSR     *(unsigned char*)0x5400
+#define ADC_CR1     *(unsigned char*)0x5401
+#define ADC_CR2     *(unsigned char*)0x5402
+#define ADC_CR3     *(unsigned char*)0x5403
+#define ADC_DRH     *(unsigned char*)0x5404
+#define ADC_DRL     *(unsigned char*)0x5405
+#define ADC_TDRH    *(unsigned char*)0x5406
+#define ADC_TDRL    *(unsigned char*)0x5407
+#define ADC_HTRH    *(unsigned char*)0x5408
+#define ADC_HTRL    *(unsigned char*)0x5409
+#define ADC_LTRH    *(unsigned char*)0x540A
+#define ADC_LTRL    *(unsigned char*)0x540B
+#define ADC_AWSRH   *(unsigned char*)0x540C
+#define ADC_AWSRL   *(unsigned char*)0x540D
+#define ADC_AWCRH   *(unsigned char*)0x540E
+#define ADC_AWCRL   *(unsigned char*)0x540F
+
+/* ------------------- swim control ------------------- */
+#define CFG_GCR         *(unsigned char*)0x7F60
+#define SWIM_CSR        *(unsigned char*)0x7F80
+
+/* ------------------- ITC ------------------- */
+#define ITC_SPR1        *(unsigned char*)0x7F70
+#define ITC_SPR2        *(unsigned char*)0x7F71
+#define ITC_SPR3        *(unsigned char*)0x7F72
+#define ITC_SPR4        *(unsigned char*)0x7F73
+#define ITC_SPR5        *(unsigned char*)0x7F74
+#define ITC_SPR6        *(unsigned char*)0x7F75
+#define ITC_SPR7        *(unsigned char*)0x7F76
+#define ITC_SPR8        *(unsigned char*)0x7F77
+
+
+/* -------------------- UNIQUE ID -------------------- */
+#if defined STM8S105 || defined STM8S103 // maybe some other MCU have this too???
+#define U_ID00      (unsigned char*)0x48CD
+#define U_ID01      (unsigned char*)0x48CE
+#define U_ID02      (unsigned char*)0x48CF
+#define U_ID03      (unsigned char*)0x48D0
+#define U_ID04      (unsigned char*)0x48D1
+#define U_ID05      (unsigned char*)0x48D2
+#define U_ID06      (unsigned char*)0x48D3
+#define U_ID07      (unsigned char*)0x48D4
+#define U_ID08      (unsigned char*)0x48D5
+#define U_ID09      (unsigned char*)0x48D6
+#define U_ID10      (unsigned char*)0x48D7
+#define U_ID11      (unsigned char*)0x48D8
+#endif // defined STM8S105 || defined STM8S103
+
+// CCR REGISTER: bits 3&5 should be 1 if you wanna change EXTI_CRx
+#define CCR         *(unsigned char*)0x7F0A
+
+/* -------------------- OPTION BYTES -------------------- */
+#if defined STM8S105
+// readout protection
+#define OPT0        *(unsigned char*)0x4800
+// user boot code
+#define OPT1        *(unsigned char*)0x4801
+#define NOPT1       *(unsigned char*)0x4802
+// alternate functions remapping
+// | AFR7 | ... | AFR0 |
+// AFR7 - PD4 = BEEP; AFR6 - PB4/PB5 = I2C; AFR5 - PB0..3 - TIM1
+// AFR4 - PD7 = TIM1_CH4; AFR3 - PD0 = TIM1_BKIN
+// AFR2 - PD0 = CLK_CCO; AFR1 - PA3 = TIM3_CH1, PD2 = TIM2_CH3
+// AFR0 - PD3 = ADC_ETR
+#define OPT2        *(unsigned char*)0x4803
+#define NOPT2       *(unsigned char*)0x4804
+// trim, watchdog
+#define OPT3        *(unsigned char*)0x4805
+#define NOPT3       *(unsigned char*)0x4806
+// extclc, awu
+#define OPT4        *(unsigned char*)0x4807
+#define NOPT4       *(unsigned char*)0x4808
+// HSE stab time
+#define OPT5        *(unsigned char*)0x4809
+#define NOPT5       *(unsigned char*)0x480a
+// none
+#define OPT6        *(unsigned char*)0x480b
+#define NOPT6       *(unsigned char*)0x480c
+// none
+#define OPT7        *(unsigned char*)0x480d
+#define NOPT7       *(unsigned char*)0x480e
+// bootloader opt byte
+#define OPTBL       *(unsigned char*)0x487e
+#define NOPTBL      *(unsigned char*)0x487f
+
+#endif
+
+#endif // __STM8L_H__
+
+// #define      *(unsigned char*)0x
diff --git a/STM8/uart.c b/STM8/uart.c
new file mode 100644
index 0000000..153b714
--- /dev/null
+++ b/STM8/uart.c
@@ -0,0 +1,141 @@
+/*
+ *                                                                                                  geany_encoding=koi8-r
+ * uart.c
+ *
+ * Copyright 2017 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+
+#include "uart.h"
+#include "ports_definition.h"
+
+U8 uart_rdy = 0;
+U8 rx_idx = 0, tx_idx = 0, tx_len = 0;
+
+U8 UART_rx[UART_BUF_LEN+1]; // cycle buffer for received data
+U8 UART_tx[UART_BUF_LEN+1];
+
+/**
+ * Send one byte through UART
+ * @param byte - data to send
+ *
+void UART_send_byte(U8 byte){
+    while(!(UART2_SR & UART_SR_TXE)); // wait until previous byte transmitted
+    UART2_DR = byte;
+}*/
+
+void uart_write(char *str){
+    while(tx_len);
+    UART2_CR2 &= ~UART_CR2_TIEN;
+    tx_idx = 0;
+    do{
+        UART_tx[tx_len++] = *str++;
+    }while(*str && tx_len < UART_BUF_LEN);
+    UART2_CR2 |= UART_CR2_TIEN; // enable TXE interrupt
+}
+
+char *omit_whitespace(char *str){
+    char c;
+    for(c = *str; c == ' ' || c == '\t' || c == '\r' || c == '\n'; c = *(++str));
+    return str;
+}
+
+void printUint(U8 *val, U8 len){
+    unsigned long Number = 0;
+    U8 i = len;
+    char ch;
+    U8 decimal_buff[12]; // max len of U32 == 10 + \n + \0
+    if(len > 4 || len == 3 || len == 0) return;
+    for(i = 0; i < 12; i++)
+        decimal_buff[i] = 0;
+    decimal_buff[10] = '\n';
+    ch = 9;
+    switch(len){
+        case 1:
+            Number = *((U8*)val);
+            break;
+        case 2:
+            Number = *((U16*)val);
+        break;
+        case 4:
+            Number = *((unsigned long*)val);
+        break;
+    }
+    do{
+        i = Number % 10L;
+        decimal_buff[ch--] = i + '0';
+        Number /= 10L;
+    }while(Number && ch > -1);
+    uart_write((char*)&decimal_buff[ch+1]);
+}
+
+/**
+ * print signed long onto terminal
+ * max len = 10 symbols + 1 for "-" + 1 for '\n' + 1 for 0 = 13
+ */
+void print_long(long Number){
+    U8 i, L = 0;
+    U8 ch;
+    char decimal_buff[12];
+    decimal_buff[11] = 0;
+    ch = 11;
+    if(Number < 0){
+        Number = -Number;
+        L = 1;
+    }
+    do{
+        i = Number % 10L;
+        decimal_buff[--ch] = i + '0';
+        Number /= 10L;
+    }while(Number && ch > 0);
+    if(ch > 0 && L) decimal_buff[--ch] = '-';
+    uart_write(&decimal_buff[ch]);
+}
+
+
+/**
+ * read 16 bit integer value from buffer until first non-number
+ * @param buff (i) - input buffer
+ * @param (o) - output value
+ * @return 1 if all OK or 0 if there's none numbers in buffer
+ */
+U8 readInt(char *buff, int *val){
+    U8 sign = 0, rb, bad = 1;
+    long R = 0;
+    //usart_send("readInt, buff=");
+    //usart_send(buff);
+    if(*buff == '-'){
+        sign = 1;
+        ++buff;
+    }
+    do{
+        rb = *buff++;
+        if(rb < '0' || rb > '9') break;
+        bad = 0;
+        R = R * 10L + rb - '0';
+        if(R > 0x7fff){ // bad value
+            bad = 1;
+            break;
+        }
+    }while(1);
+    //print_long(R);
+    if(bad) return 0;
+    if(sign) R = -R;
+    if(val) *val = (int)R;
+    return 1;
+}
diff --git a/STM8/uart.h b/STM8/uart.h
new file mode 100644
index 0000000..9963318
--- /dev/null
+++ b/STM8/uart.h
@@ -0,0 +1,47 @@
+/*
+ *                                                                                                  geany_encoding=koi8-r
+ * uart.h
+ *
+ * Copyright 2017 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+#pragma once
+#ifndef __UART_H__
+#define __UART_H__
+
+#include "ports_definition.h"
+
+#define UART_BUF_LEN 32
+
+extern U8 UART_rx[];
+extern U8 UART_tx[];
+extern U8 uart_rdy, rx_idx, tx_idx, tx_len;
+
+//extern U32 Global_time; // global time in ms
+
+void uart_write(char *str);
+
+char *omit_whitespace(char *str);
+
+void print_long(long Number);
+void printUint(U8 *val, U8 len);
+U8 readInt(char *buff, int *val);
+
+#endif // __UART_H__
+
+
diff --git a/Makefile b/avr/Makefile
similarity index 100%
rename from Makefile
rename to avr/Makefile
diff --git a/Readme b/avr/Readme
similarity index 100%
rename from Readme
rename to avr/Readme
diff --git a/includes.h b/avr/includes.h
similarity index 100%
rename from includes.h
rename to avr/includes.h
diff --git a/main.c b/avr/main.c
similarity index 100%
rename from main.c
rename to avr/main.c
diff --git a/proto.c b/avr/proto.c
similarity index 100%
rename from proto.c
rename to avr/proto.c
diff --git a/avr/proto.h b/avr/proto.h
new file mode 100644
index 0000000..c398a55
--- /dev/null
+++ b/avr/proto.h
@@ -0,0 +1,30 @@
+/*
+ *                                                                                                  geany_encoding=koi8-r
+ * proto.h
+ *
+ * Copyright 2017 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+
+#pragma once
+#ifndef __PROTO_H__
+#define __PROTO_H__
+
+void process_string();
+
+#endif // __PROTO_H__
diff --git a/scorpio.c.tags b/avr/scorpio.c.tags
similarity index 100%
rename from scorpio.c.tags
rename to avr/scorpio.c.tags
diff --git a/scorpio.hex b/avr/scorpio.hex
similarity index 100%
rename from scorpio.hex
rename to avr/scorpio.hex
diff --git a/stepper.c b/avr/stepper.c
similarity index 100%
rename from stepper.c
rename to avr/stepper.c
diff --git a/stepper.h b/avr/stepper.h
similarity index 100%
rename from stepper.h
rename to avr/stepper.h
diff --git a/uart.c b/avr/uart.c
similarity index 100%
rename from uart.c
rename to avr/uart.c
diff --git a/uart.h b/avr/uart.h
similarity index 100%
rename from uart.h
rename to avr/uart.h