diff --git a/F0-nolib/CANbus_stepper/src/canstepper.bin b/F0-nolib/CANbus_stepper/src/canstepper.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/Chiller/chiller.bin b/F0-nolib/Chiller/chiller.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/F0_testbrd/pl2303.bin b/F0-nolib/F0_testbrd/pl2303.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/QuadEncoder/encoder.bin b/F0-nolib/QuadEncoder/encoder.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/Servo/servo.bin b/F0-nolib/Servo/servo.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/Socket_fans/sockfans.bin b/F0-nolib/Socket_fans/sockfans.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/TM1637/tm1637.bin b/F0-nolib/TM1637/tm1637.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/USBHID/usbhid.bin b/F0-nolib/USBHID/usbhid.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/USB_pl2303_snippet/usb.bin b/F0-nolib/USB_pl2303_snippet/usb.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/blink/blink.bin b/F0-nolib/blink/blink.bin
old mode 100644
new mode 100755
diff --git a/F0-nolib/canbus/src/canbus.bin b/F0-nolib/canbus/src/canbus.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/htu21d_nucleo/usart.bin b/F0-nolib/htu21d_nucleo/usart.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/inc/F0 b/F0-nolib/inc/F0
index ba957c0..0be4819 120000
--- a/F0-nolib/inc/F0
+++ b/F0-nolib/inc/F0
@@ -1 +1 @@
-/home/eddy/Yandex.Disk/Projects/stm32samples/F0-nolib/inc/Fx
\ No newline at end of file
+Fx
\ No newline at end of file
diff --git a/F0-nolib/inc/cm/core_cmFunc.h b/F0-nolib/inc/cm/core_cmFunc.h
index a1bd88c..bdc54e6 100644
--- a/F0-nolib/inc/cm/core_cmFunc.h
+++ b/F0-nolib/inc/cm/core_cmFunc.h
@@ -453,7 +453,7 @@ __attribute__( ( always_inline ) ) __STATIC_INLINE uint32_t __get_MSP(void)
  */
 __attribute__( ( always_inline ) ) __STATIC_INLINE void __set_MSP(uint32_t topOfMainStack)
 {
-  __ASM volatile ("MSR msp, %0\n" : : "r" (topOfMainStack) : "sp");
+  __ASM volatile ("MSR msp, %0\n" : : "r" (topOfMainStack));
 }
 
 
diff --git a/F0-nolib/morze/morze.bin b/F0-nolib/morze/morze.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/pl2303/pl2303.bin b/F0-nolib/pl2303/pl2303.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/tsys01_nucleo/tsys01.bin b/F0-nolib/tsys01_nucleo/tsys01.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/uart_blink/uartblink.bin b/F0-nolib/uart_blink/uartblink.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/uart_blink_dma/uartblink.bin b/F0-nolib/uart_blink_dma/uartblink.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/uart_nucleo/usart.bin b/F0-nolib/uart_nucleo/usart.bin
old mode 100755
new mode 100644
diff --git a/F0-nolib/usbcan/can.c b/F0-nolib/usbcan/can.c
index 3e1868d..173f917 100644
--- a/F0-nolib/usbcan/can.c
+++ b/F0-nolib/usbcan/can.c
@@ -48,14 +48,25 @@ CAN_status CAN_get_status(){
 #ifdef EBUG
     if(st == CAN_FIFO_OVERRUN) MSG("fifo 0 overrun\n");
 #endif
-    if(st == CAN_FIFO_OVERRUN) can_status = CAN_READY;
+    if(st == CAN_FIFO_OVERRUN){
+        SEND("FIFO overrun\n");
+        can_status = CAN_READY;
+    }
     return st;
 }
 
 // push next message into buffer; return 1 if buffer overfull
 static int CAN_messagebuf_push(CAN_message *msg){
     //MSG("Try to push\n");
-    if(first_free_idx == first_nonfree_idx) return 1; // no free space
+#ifdef EBUG
+        SEND("push\n");
+#endif
+    if(first_free_idx == first_nonfree_idx){
+#ifdef EBUG
+        SEND("INBUF OVERFULL\n");
+#endif
+        return 1; // no free space
+    }
     if(first_nonfree_idx < 0) first_nonfree_idx = 0;  // first message in empty buffer
     memcpy(&messages[first_free_idx++], msg, sizeof(CAN_message));
     // need to roll?
@@ -155,7 +166,7 @@ void CAN_setup(uint16_t speed){
     CAN->sFilterRegister[0].FR1 = (1<<21)|(1<<5); // all odd IDs
     CAN->FFA1R = 2; // filter 1 for FIFO1, filter 0 - for FIFO0
     CAN->sFilterRegister[1].FR1 = (1<<21); // all even IDs
-    CAN->FMR &=~ CAN_FMR_FINIT; /* (12) */
+    CAN->FMR &= ~CAN_FMR_FINIT; /* (12) */
     CAN->IER |= CAN_IER_ERRIE | CAN_IER_FOVIE0 | CAN_IER_FOVIE1; /* (13) */
 
     /* Configure IT */
@@ -202,8 +213,8 @@ void can_proc(){
             case 7: errmsg = "(set by software)"; break;
         }
         SEND(errmsg); SEND(" error\n");
-        if(CAN->ESR & CAN_ESR_BOFF) SEND("Bus off");
-        if(CAN->ESR & CAN_ESR_EPVF) SEND("Passive error limit");
+        if(CAN->ESR & CAN_ESR_BOFF) SEND("Bus off ");
+        if(CAN->ESR & CAN_ESR_EPVF) SEND("Passive error limit ");
         if(CAN->ESR & CAN_ESR_EWGF) SEND("Error counter limit");
         NL();
         // request abort for all mailboxes
@@ -287,6 +298,9 @@ static void can_process_fifo(uint8_t fifo_num){
     LED_on(LED1); // Turn on LED1 - message received
     CAN_FIFOMailBox_TypeDef *box = &CAN->sFIFOMailBox[fifo_num];
     volatile uint32_t *RFxR = (fifo_num) ? &CAN->RF1R : &CAN->RF0R;
+#ifdef EBUG
+        printu(*RFxR & CAN_RF0R_FMP0); SEND(" messages in FIFO\n");
+#endif
     // read all
     while(*RFxR & CAN_RF0R_FMP0){ // amount of messages pending
         // CAN_RDTxR: (16-31) - timestamp, (8-15) - filter match index, (0-3) - data length
@@ -334,6 +348,13 @@ static void can_process_fifo(uint8_t fifo_num){
 }
 
 void cec_can_isr(){
+    /*
+    if(CAN->RF0R & CAN_RF0R_FOVR0){
+       can_process_fifo(0);
+    }
+    if(CAN->RF1R & CAN_RF1R_FOVR1){
+       can_process_fifo(1);
+    }*/
     if(CAN->RF0R & CAN_RF0R_FOVR0){ // FIFO overrun
         CAN->RF0R &= ~CAN_RF0R_FOVR0;
         can_status = CAN_FIFO_OVERRUN;
diff --git a/F0-nolib/usbcan/main.c b/F0-nolib/usbcan/main.c
index 8a6decc..e1bea7e 100644
--- a/F0-nolib/usbcan/main.c
+++ b/F0-nolib/usbcan/main.c
@@ -76,7 +76,9 @@ int main(void){
     USB_setup();
     CAN_setup(100);
     RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
+#ifndef EBUG
     iwdg_setup();
+#endif
 
     while (1){
         IWDG->KR = IWDG_REFRESH; // refresh watchdog
@@ -90,22 +92,23 @@ int main(void){
             SEND("CAN bus fifo overrun occured!\n");
             sendbuf();
         }
-        can_mesg = CAN_messagebuf_pop();
-        if(can_mesg && isgood(can_mesg->ID)){
-            LED_on(LED0);
-            lastT = Tms;
-            if(!lastT) lastT = 1;
-            if(ShowMsgs){ // new data in buff
-                IWDG->KR = IWDG_REFRESH;
-                len = can_mesg->length;
-                printu(Tms);
-                SEND(" #");
-                printuhex(can_mesg->ID);
-                for(ctr = 0; ctr < len; ++ctr){
-                    SEND(" ");
-                    printuhex(can_mesg->data[ctr]);
+        while((can_mesg = CAN_messagebuf_pop())){
+            if(can_mesg && isgood(can_mesg->ID)){
+                LED_on(LED0);
+                lastT = Tms;
+                if(!lastT) lastT = 1;
+                if(ShowMsgs){ // new data in buff
+                    IWDG->KR = IWDG_REFRESH;
+                    len = can_mesg->length;
+                    printu(Tms);
+                    SEND(" #");
+                    printuhex(can_mesg->ID);
+                    for(ctr = 0; ctr < len; ++ctr){
+                        SEND(" ");
+                        printuhex(can_mesg->data[ctr]);
+                    }
+                    newline(); sendbuf();
                 }
-                newline(); sendbuf();
             }
         }
         if((txt = get_USB())){
diff --git a/F0-nolib/usbcan/usbcan.bin b/F0-nolib/usbcan/usbcan.bin
index cb484e6..707e7c5 100755
Binary files a/F0-nolib/usbcan/usbcan.bin and b/F0-nolib/usbcan/usbcan.bin differ
diff --git a/F0-nolib/usbcan_relay/Readme.md b/F0-nolib/usbcan_relay/Readme.md
index 5cfc4f6..e2302c4 100644
--- a/F0-nolib/usbcan_relay/Readme.md
+++ b/F0-nolib/usbcan_relay/Readme.md
@@ -19,3 +19,13 @@ Pinout:
 - PB12..15 - LED0..3 outputs (direct outputs without any protection!!!)
  
 The pins LEDr0 and LEDr1 are indicated relay works (12V through 2.2kOhm resistor)
+
+
+### Buttons standalone
+
+BTN1 - switch relay1
+
+BTN2 - switch relay 2
+
+BTN3 - change PWM0: hold to turn ON or turn OFF; press shortly BTN1/BTN2 to increase/decrease PWM0 to 1, 
+hold BTN1/BTN2 to inc/dec PWM0 to 25 (do as many presses as need).
\ No newline at end of file
diff --git a/F0-nolib/usbcan_relay/buttons.c b/F0-nolib/usbcan_relay/buttons.c
index 24a032f..c61ff57 100644
--- a/F0-nolib/usbcan_relay/buttons.c
+++ b/F0-nolib/usbcan_relay/buttons.c
@@ -27,6 +27,8 @@ typedef struct{
 
 static keybase allkeys[BTNSNO] = {0}; // array for buttons' states
 
+uint32_t lastUnsleep = 0; // last keys activity time
+
 void process_keys(){
     static uint32_t lastT = 0;
     if(Tms == lastT) return;
@@ -61,6 +63,7 @@ void process_keys(){
         }
         if(e != k->event){
             k->lastTms = Tms;
+            lastUnsleep = Tms;
         }
     }
 }
@@ -79,3 +82,9 @@ keyevent keystate(uint8_t k, uint32_t *T){
     if(T) *T = allkeys[k].lastTms;
     return evt;
 }
+
+// getter of keyevent for allkeys[]
+keyevent keyevt(uint8_t k){
+    if(k >= BTNSNO) return EVT_NONE;
+    return allkeys[k].event;
+}
diff --git a/F0-nolib/usbcan_relay/buttons.h b/F0-nolib/usbcan_relay/buttons.h
index 7906e72..79c5c47 100644
--- a/F0-nolib/usbcan_relay/buttons.h
+++ b/F0-nolib/usbcan_relay/buttons.h
@@ -37,6 +37,7 @@ extern uint32_t lastUnsleep; // last keys activity time
 
 void process_keys();
 keyevent keystate(uint8_t k, uint32_t *T);
+keyevent keyevt(uint8_t k);
 
 #define BUTTONS_H__
 #endif // BUTTONS_H__
diff --git a/F0-nolib/usbcan_relay/can.c b/F0-nolib/usbcan_relay/can.c
index a51641c..24bc8d5 100644
--- a/F0-nolib/usbcan_relay/can.c
+++ b/F0-nolib/usbcan_relay/can.c
@@ -27,7 +27,7 @@
 static CAN_message messages[CAN_INMESSAGE_SIZE];
 static uint8_t first_free_idx = 0;    // index of first empty cell
 static int8_t first_nonfree_idx = -1; // index of first data cell
-static uint16_t oldspeed = 100; // speed of last init
+static uint16_t oldspeed = DEFAULT_CAN_SPEED; // speed of last init
 
 #ifdef EBUG
 static uint32_t last_err_code = 0;
@@ -42,10 +42,6 @@ static CAN_message *flood_msg = NULL; // == loc_flood_msg - to flood
 
 CAN_status CAN_get_status(){
     CAN_status st = can_status;
-    // give overrun message only once
-#ifdef EBUG
-    if(st == CAN_FIFO_OVERRUN) MSG("fifo 0 overrun\n");
-#endif
     if(st == CAN_FIFO_OVERRUN) can_status = CAN_READY;
     return st;
 }
@@ -214,9 +210,7 @@ CAN_status can_send(uint8_t *msg, uint8_t len, uint16_t target_id){
     if(CAN->TSR & (CAN_TSR_TME)){
         mailbox = (CAN->TSR & CAN_TSR_CODE) >> 24;
     }else{ // no free mailboxes
-#ifdef EBUG
-        MSG("No free mailboxes"); NL();
-#endif
+        //SEND("No free mailboxes"); NL();
         return CAN_BUSY;
     }
 #ifdef EBUG
@@ -313,7 +307,7 @@ static void can_process_fifo(uint8_t fifo_num){
             }
         }
         if(msg.ID == CANID) parseCANcommand(&msg);
-        else if(CAN_messagebuf_push(&msg)) return; // error: buffer is full, try later
+        if(CAN_messagebuf_push(&msg)) return; // error: buffer is full, try later
         *RFxR |= CAN_RF0R_RFOM0; // release fifo for access to next message
     }
     //if(*RFxR & CAN_RF0R_FULL0) *RFxR &= ~CAN_RF0R_FULL0;
diff --git a/F0-nolib/usbcan_relay/canproto.c b/F0-nolib/usbcan_relay/canproto.c
index cc0d1c5..46ab9c2 100644
--- a/F0-nolib/usbcan_relay/canproto.c
+++ b/F0-nolib/usbcan_relay/canproto.c
@@ -36,7 +36,7 @@
  * CAN_CMD_LED: data[1] = LEDs state (bits 0..3 for LEDs number 0..3)
  * CAN_CMD_MCU: data[2,3] = int16_t MCUT*10, data[4,5] = uint16_t Vdd*100 (LITTLE endian!)
  * CAN_CMD_PWM: data[1..3] = pwm value for each channel (0..2)
- * CAN_CMD_RELAY: data[0] = (bits 0 & 1) - state of relay N]
+ * CAN_CMD_RELAY: data[1] = (bits 0 & 1) - state of relay N]
  * CAN_CMD_TMS: data[4..7] = Tms (LITTLE endian!)
  */
 
@@ -56,13 +56,19 @@ TRUE_INLINE uint8_t ADCget(uint8_t values[8]){
 
 TRUE_INLINE void BTNSget(uint8_t values[8]){
     uint32_t T;
-    for(uint8_t i = 0; i < BTNSNO; ++i){
+    uint8_t start = 0, stop = BTNSNO;
+    if(values[1] < BTNSNO){ // check only one button
+        start = values[1]; stop = start + 1;
+    }
+    for(uint8_t i = start; i < stop; ++i){
         values[1] = i;
         values[2] = keystate(i, &T);
         values[3] = 0;
         *((uint32_t*)&values[4]) = T;
-        int N = 1000;
-        while(CAN_BUSY == can_send(values, 8, OUTPID)) if(--N == 0) break;
+        T = Tms;
+        while(CAN_BUSY == can_send(values, 8, OUTPID)){
+            if(Tms - T > 5) break;
+        }
     }
 }
 
@@ -141,22 +147,24 @@ void parseCANcommand(CAN_message *msg){
             len = ADCget(outpdata);
         break;
         case CAN_CMD_BTNS:
+            if(msg->length == 2) outpdata[1] = msg->data[1]; // check only one button
+            else outpdata[1] = BTNSNO;
             BTNSget(outpdata);
             return;
         break;
         case CAN_CMD_LED:
-            if(setter) LEDSset(msg->data);
+            if(setter && msg->length > 1) LEDSset(msg->data);
             len = LEDSget(outpdata);
         break;
         case CAN_CMD_MCU:
             len = MCUget(outpdata);
         break;
         case CAN_CMD_PWM:
-            if(setter) PWMset(msg->data);
+            if(setter && msg->length > 3) PWMset(msg->data);
             len = PWMget(outpdata);
         break;
         case CAN_CMD_RELAY:
-            if(setter) Rset(msg->data);
+            if(setter && msg->length > 1) Rset(msg->data);
             len = Rget(outpdata);
         break;
         case CAN_CMD_TMS:
diff --git a/F0-nolib/usbcan_relay/canproto.h b/F0-nolib/usbcan_relay/canproto.h
index 2de8898..433f100 100644
--- a/F0-nolib/usbcan_relay/canproto.h
+++ b/F0-nolib/usbcan_relay/canproto.h
@@ -40,7 +40,7 @@ typedef enum{
 } CAN_commands;
 
 // output messages identifier
-#define OUTPID  (CANID + 0x100)
+#define OUTPID  (CANID)
 
 void parseCANcommand(CAN_message *msg);
 
diff --git a/F0-nolib/usbcan_relay/custom_buttons.c b/F0-nolib/usbcan_relay/custom_buttons.c
new file mode 100644
index 0000000..8a4b241
--- /dev/null
+++ b/F0-nolib/usbcan_relay/custom_buttons.c
@@ -0,0 +1,67 @@
+/*
+ * This file is part of the canrelay project.
+ * Copyright 2021 Edward V. Emelianov <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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+// custom standalone buttons reaction
+
+#include <stm32f0.h>
+#include "buttons.h"
+#include "custom_buttons.h"
+#include "hardware.h"
+
+
+/*
+ * check buttons, on long press of button:
+ * 1 - switch relay1
+ * 2 - switch relay2
+ * 3 - work with PWM out 0 (when btn3 pressed, btn1 increased & btn2 decreased PWM width)
+ *        press once btn2/3 to change PWM @1, hold to change @25 (repeat as many times as need)
+ */
+void custom_buttons_process(){
+    static uint32_t lastT = 0;
+    static uint8_t pwmval = 127;
+    static uint8_t trig = 0; // == 1 if given btn3 was off
+    if(lastUnsleep == lastT) return; // no buttons activity
+    lastT = lastUnsleep;
+    if(keyevt(3) == EVT_HOLD){ // PWM
+        if(keyevt(2) == EVT_HOLD){ // decrease PWM by 25
+            if(pwmval > 25) pwmval -= 25;
+            else pwmval = 0;
+        }else if(keyevt(2) == EVT_PRESS){ // decrease PWM by 1
+            if(pwmval > 0) --pwmval;
+        }else if(keyevt(1) == EVT_HOLD){ // increase PWM by 25
+            if(pwmval < 230) pwmval += 25;
+            else pwmval = 255;
+        }else if(keyevt(1) == EVT_PRESS){
+            if(pwmval < 254) ++pwmval;
+        }
+        if(trig == 0){ // first hold after release
+            if(TIM1->CCR1) TIM1->CCR1 = 0; // turn off if was ON
+            else{
+                TIM1->CCR1 = pwmval;
+                trig = 1;
+            }
+        }else TIM1->CCR1 = pwmval;
+        return;
+    }else trig = 0;
+    if(keyevt(1) == EVT_HOLD){ // relay1
+        Relay_TGL(0);
+    }
+    if(keyevt(2) == EVT_HOLD){ // relay2
+        Relay_TGL(1);
+    }
+}
diff --git a/F0-nolib/usbcan_relay/custom_buttons.h b/F0-nolib/usbcan_relay/custom_buttons.h
new file mode 100644
index 0000000..426f10f
--- /dev/null
+++ b/F0-nolib/usbcan_relay/custom_buttons.h
@@ -0,0 +1,25 @@
+/*
+ * This file is part of the canrelay project.
+ * Copyright 2021 Edward V. Emelianov <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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#ifndef CUSTOM_BUTTONS_H__
+#define CUSTOM_BUTTONS_H__
+
+void custom_buttons_process();
+
+#endif // CUSTOM_BUTTONS_H__
diff --git a/F0-nolib/usbcan_relay/hardware.h b/F0-nolib/usbcan_relay/hardware.h
index 00f5dd3..0fce465 100644
--- a/F0-nolib/usbcan_relay/hardware.h
+++ b/F0-nolib/usbcan_relay/hardware.h
@@ -22,6 +22,9 @@
 
 #include <stm32f0.h>
 
+// default CAN bus speed in kbaud
+#define DEFAULT_CAN_SPEED       (250)
+
 #define SYSMEM03x 0x1FFFEC00
 #define SYSMEM04x 0x1FFFC400
 #define SYSMEM05x 0x1FFFEC00
@@ -55,6 +58,7 @@ extern GPIO_TypeDef *R_ports[RelaysNO];
 extern const uint32_t R_pins[RelaysNO];
 #define Relay_ON(x)     do{pin_set(R_ports[x], R_pins[x]);}while(0)
 #define Relay_OFF(x)    do{pin_clear(R_ports[x], R_pins[x]);}while(0)
+#define Relay_TGL(x)    do{pin_toggle(R_ports[x], R_pins[x]);}while(0)
 #define Relay_chk(x)    (pin_read(R_ports[x], R_pins[x]))
 
 // Buttons amount
diff --git a/F0-nolib/usbcan_relay/main.c b/F0-nolib/usbcan_relay/main.c
index 4d6343e..4fbb590 100644
--- a/F0-nolib/usbcan_relay/main.c
+++ b/F0-nolib/usbcan_relay/main.c
@@ -19,6 +19,7 @@
 #include "adc.h"
 #include "buttons.h"
 #include "can.h"
+#include "custom_buttons.h"
 #include "hardware.h"
 #include "proto.h"
 #include "usb.h"
@@ -74,32 +75,34 @@ int main(void){
     adc_setup();
     tim1_setup();
     USB_setup();
-    CAN_setup(100);
+    CAN_setup(DEFAULT_CAN_SPEED);
     RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
     iwdg_setup();
 
     while (1){
         IWDG->KR = IWDG_REFRESH; // refresh watchdog
         process_keys();
+        custom_buttons_process();
         can_proc();
         usb_proc();
         if(CAN_get_status() == CAN_FIFO_OVERRUN){
             SEND("CAN bus fifo overrun occured!\n");
             sendbuf();
         }
-        can_mesg = CAN_messagebuf_pop();
-        if(can_mesg && isgood(can_mesg->ID)){
-            if(ShowMsgs){ // new data in buff
-                IWDG->KR = IWDG_REFRESH;
-                len = can_mesg->length;
-                printu(Tms);
-                SEND(" #");
-                printuhex(can_mesg->ID);
-                for(ctr = 0; ctr < len; ++ctr){
-                    SEND(" ");
-                    printuhex(can_mesg->data[ctr]);
+        while((can_mesg = CAN_messagebuf_pop())){
+            if(can_mesg && isgood(can_mesg->ID)){
+                if(ShowMsgs){ // new data in buff
+                    IWDG->KR = IWDG_REFRESH;
+                    len = can_mesg->length;
+                    printu(Tms);
+                    SEND(" #");
+                    printuhex(can_mesg->ID);
+                    for(ctr = 0; ctr < len; ++ctr){
+                        SEND(" ");
+                        printuhex(can_mesg->data[ctr]);
+                    }
+                    newline(); sendbuf();
                 }
-                newline(); sendbuf();
             }
         }
         if((txt = get_USB())){
diff --git a/F0-nolib/usbcan_relay/usbcan.bin b/F0-nolib/usbcan_relay/usbcan.bin
index 84068e3..299e9c7 100755
Binary files a/F0-nolib/usbcan_relay/usbcan.bin and b/F0-nolib/usbcan_relay/usbcan.bin differ
diff --git a/F0/blink/blink.bin b/F0/blink/blink.bin
old mode 100755
new mode 100644
diff --git a/F0/uart/uart.bin b/F0/uart/uart.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/BMP180/BMP180.bin b/F1-nolib/BMP180/BMP180.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/BMP280/BMP280.bin b/F1-nolib/BMP280/BMP280.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/CDC_ACM/cdcacm.bin b/F1-nolib/CDC_ACM/cdcacm.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/DHT22_DHT11/DHT22.bin b/F1-nolib/DHT22_DHT11/DHT22.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/DS18/DS18.bin b/F1-nolib/DS18/DS18.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/F1_testbrd/pl2303.bin b/F1-nolib/F1_testbrd/pl2303.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/I2Cscan/I2Cscan.bin b/F1-nolib/I2Cscan/I2Cscan.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/LED_Screen/LEDscreen.bin b/F1-nolib/LED_Screen/LEDscreen.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/LED_Screen/genlist b/F1-nolib/LED_Screen/genlist
old mode 100755
new mode 100644
diff --git a/F1-nolib/LED_Screen/scrtest/scrtest b/F1-nolib/LED_Screen/scrtest/scrtest
old mode 100755
new mode 100644
diff --git a/F1-nolib/MAX7219_screen/MAX7219.bin b/F1-nolib/MAX7219_screen/MAX7219.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/PL2303/pl2303.bin b/F1-nolib/PL2303/pl2303.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/RGB_LED_Screen/RGBLEDscreen.bin b/F1-nolib/RGB_LED_Screen/RGBLEDscreen.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/RGB_LED_Screen/getrand b/F1-nolib/RGB_LED_Screen/getrand
old mode 100755
new mode 100644
diff --git a/F1-nolib/RGB_LED_Screen/proto.c b/F1-nolib/RGB_LED_Screen/proto.c
deleted file mode 100644
index 63ffb0f..0000000
--- a/F1-nolib/RGB_LED_Screen/proto.c
+++ /dev/null
@@ -1,301 +0,0 @@
-/*
- * This file is part of the RGBLEDscreen project.
- * Copyright 2020 Edward V. Emelianov <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 3 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, see <http://www.gnu.org/licenses/>.
- */
-
-#include "adcrandom.h"
-#include "balls.h"
-#include "fonts.h"
-#include "proto.h"
-#include "screen.h"
-#include "usb.h"
-
-extern uint8_t countms, rainbow, balls;
-extern uint32_t Tms;
-
-char *omit_spaces(const char *buf){
-    while(*buf){
-        if(*buf > ' ') break;
-        ++buf;
-    }
-    return (char*)buf;
-}
-
-// In case of overflow return `buf` and N==0xffffffff
-// read decimal number & return pointer to next non-number symbol
-static char *getdec(const char *buf, uint32_t *N){
-    char *start = (char*)buf;
-    uint32_t num = 0;
-    while(*buf){
-        char c = *buf;
-        if(c < '0' || c > '9'){
-            break;
-        }
-        if(num > 429496729 || (num == 429496729 && c > '5')){ // overflow
-            *N = 0xffffff;
-            return start;
-        }
-        num *= 10;
-        num += c - '0';
-        ++buf;
-    }
-    *N = num;
-    return (char*)buf;
-}
-// read hexadecimal number (without 0x prefix!)
-static char *gethex(const char *buf, uint32_t *N){
-    char *start = (char*)buf;
-    uint32_t num = 0;
-    while(*buf){
-        char c = *buf;
-        uint8_t M = 0;
-        if(c >= '0' && c <= '9'){
-            M = '0';
-        }else if(c >= 'A' && c <= 'F'){
-            M = 'A' - 10;
-        }else if(c >= 'a' && c <= 'f'){
-            M = 'a' - 10;
-        }
-        if(M){
-            if(num & 0xf0000000){ // overflow
-                *N = 0xffffff;
-                return start;
-            }
-            num <<= 4;
-            num += c - M;
-        }else{
-            break;
-        }
-        ++buf;
-    }
-    *N = num;
-    return (char*)buf;
-}
-// read octal number (without 0 prefix!)
-static char *getoct(const char *buf, uint32_t *N){
-    char *start = (char*)buf;
-    uint32_t num = 0;
-    while(*buf){
-        char c = *buf;
-        if(c < '0' || c > '7'){
-            break;
-        }
-        if(num & 0xe0000000){ // overflow
-            *N = 0xffffff;
-            return start;
-        }
-        num <<= 3;
-        num += c - '0';
-        ++buf;
-    }
-    *N = num;
-    return (char*)buf;
-}
-// read binary number (without b prefix!)
-static char *getbin(const char *buf, uint32_t *N){
-    char *start = (char*)buf;
-    uint32_t num = 0;
-    while(*buf){
-        char c = *buf;
-        if(c < '0' || c > '1'){
-            break;
-        }
-        if(num & 0x80000000){ // overflow
-            *N = 0xffffff;
-            return start;
-        }
-        num <<= 1;
-        if(c == '1') num |= 1;
-        ++buf;
-    }
-    *N = num;
-    return (char*)buf;
-}
-
-/**
- * @brief getnum - read uint32_t from string (dec, hex or bin: 127, 0x7f, 0b1111111)
- * @param buf - buffer with number and so on
- * @param N   - the number read
- * @return pointer to first non-number symbol in buf
- *      (if it is == buf, there's no number or if *N==0xffffffff there was overflow)
- */
-char *getnum(const char *txt, uint32_t *N){
-    char *nxt = NULL;
-    char *s = omit_spaces(txt);
-    if(*s == '0'){ // hex, oct or 0
-        if(s[1] == 'x' || s[1] == 'X'){ // hex
-            nxt = gethex(s+2, N);
-            if(nxt == s+2) nxt = (char*)txt;
-        }else if(s[1] > '0'-1 && s[1] < '8'){ // oct
-            nxt = getoct(s+1, N);
-            if(nxt == s+1) nxt = (char*)txt;
-        }else{ // 0
-            nxt = s+1;
-            *N = 0;
-        }
-    }else if(*s == 'b' || *s == 'B'){
-        nxt = getbin(s+1, N);
-        if(nxt == s+1) nxt = (char*)txt;
-    }else{
-        nxt = getdec(s, N);
-        if(nxt == s) nxt = (char*)txt;
-    }
-    return nxt;
-}
-
-const char* helpmsg =
-    "'0/1' - screen off/on\n"
-    "'2,3' - select font\n"
-    "'A' - get ADC values\n"
-    "'B' - start/stop rainBow\n"
-    "'b' - start/stop Balls\n"
-    "'C' - clear screen with given color\n"
-    "'F' - set foreground color\n"
-    "'G' - get 100 random numbers\n"
-    "'f' - get FPS\n"
-    "'R' - software reset\n"
-    "'W' - test watchdog\n"
-    "'Zz' -start/stop counting ms\n"
-    "Any text - put text @ screen\n"
-;
-
-const char *parse_cmd(const char *buf){
-    uint32_t N;
-    if(buf[1] == '\n'){ // one symbol commands
-        switch(*buf){
-            case '0':
-                ScreenOFF();
-                return "OFF\n";
-            break;
-            case '1':
-                ScreenON();
-                return "ON\n";
-            break;
-            case '2':
-                if(choose_font(FONT14)) return "Font14\n";
-                return "err\n";
-            break;
-            case '3':
-                if(choose_font(FONT16)) return "Font16\n";
-                return "err\n";
-            break;
-            case 'A':
-                USB_send("Tsens="); USB_send(u2str(getADCval(0)));
-                USB_send("\nVref="); USB_send(u2str(getADCval(1)));
-                USB_send("\nRand="); USB_send(u2str(getRand()));
-                USB_send("\n");
-                return NULL;
-            break;
-            case 'B':
-                if(rainbow){
-                    rainbow = 0;
-                    return "Stop rainbow\n";
-                }else{
-                    rainbow = 1;
-                    return "Start rainbow\n";
-                }
-            break;
-            case 'b':
-                if(balls){
-                    balls = 0;
-                    return "Stop balls\n";
-                }else{
-                    balls_init();
-                    balls = 1;
-                    return "Start balls\n";
-                }
-            case 'f':
-                if(SCREEN_RELAX == getScreenState()) return "Screen is inactive\n";
-                USB_send("FPS=");
-                USB_send(u2str(getFPS()));
-                USB_send("\n");
-                return NULL;
-            break;
-            case 'G':
-                /*USB_send(u2str(Tms)); USB_send("\n");
-                for(int i=0; i < 1000; ++i) getRand();
-                USB_send(u2str(Tms)); USB_send("\n");*/
-                for(int i = 0; i < 100; ++i){
-                    USB_send(u2str(getRand()));
-                    USB_send("\n");
-                }
-                return NULL;
-            break;
-            case 'R':
-                USB_send("Soft reset\n");
-                NVIC_SystemReset();
-            break;
-            case 'W':
-                USB_send("Wait for reboot\n");
-                while(1){nop();};
-            break;
-            case 'Z':
-                countms = 1;
-                return "Start\n";
-            break;
-            case 'z':
-                countms = 0;
-                return "Stop\n";
-            break;
-            default:
-                return helpmsg;
-        }
-        return NULL;
-    }else{
-        switch(*buf){
-            case 'C':
-                if(getnum(buf+1, &N)){
-                    ScreenOFF();
-                    setBGcolor(N);
-                    ClearScreen();
-                    ScreenON();
-                    return "Background color\n";
-                }
-                return "Wrong color\n";
-            break;
-            case 'F':
-                if(getnum(buf+1, &N)){
-                    setFGcolor(N);
-                    return "Foreground color\n";
-                }
-                return "Wrong color\n";
-            break;
-            default:
-                ScreenOFF();
-                ClearScreen();
-                PutStringAt(1, curfont->height + 3, buf);
-                ScreenON();
-        }
-        return buf;
-    }
-    return NULL;
-}
-
-// return string with number `val`
-char *u2str(uint32_t val){
-    static char strbuf[11];
-    char *bufptr = &strbuf[10];
-    *bufptr = 0;
-    if(!val){
-        *(--bufptr) = '0';
-    }else{
-        while(val){
-            *(--bufptr) = val % 10 + '0';
-            val /= 10;
-        }
-    }
-    return bufptr;
-}
diff --git a/F1-nolib/RGB_LED_Screen/proto.c b/F1-nolib/RGB_LED_Screen/proto.c
new file mode 120000
index 0000000..ef1f2e9
--- /dev/null
+++ b/F1-nolib/RGB_LED_Screen/proto.c
@@ -0,0 +1 @@
+/home/eddy/Yandex.Disk/Projects/mytakepic/.hg/wcache/checklink-target
\ No newline at end of file
diff --git a/F1-nolib/SI7005_HTU21D/si7005.bin b/F1-nolib/SI7005_HTU21D/si7005.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/SPI/SPI.bin b/F1-nolib/SPI/SPI.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/SevenCDCs/cdcacmcore.bin b/F1-nolib/SevenCDCs/cdcacmcore.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/Tetris/TETRIS.bin b/F1-nolib/Tetris/TETRIS.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/Tetris/getrand b/F1-nolib/Tetris/getrand
old mode 100755
new mode 100644
diff --git a/F1-nolib/Tetris/main.c b/F1-nolib/Tetris/main.c
deleted file mode 100644
index 0513d46..0000000
--- a/F1-nolib/Tetris/main.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- * This file is part of the TETRIS project.
- * Copyright 2021 Edward V. Emelianov <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 3 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, see <http://www.gnu.org/licenses/>.
- */
-
-#include "adcrandom.h"
-#include "arkanoid.h"
-#include "balls.h"
-#include "buttons.h"
-#include "fonts.h"
-#include "hardware.h"
-#include "menu.h"
-#include "proto.h"
-#include "screen.h"
-#include "snake.h"
-#include "tetris.h"
-#include "usb.h"
-#include "usb_lib.h"
-
-// timeout for autosleep (30s)
-#define AUTOSLEEP_TMOUT     (30000)
-
-volatile uint32_t Tms = 0;
-uint8_t balls = 0;
-
-enum{
-    STATE_MENU,
-    STATE_SNAKE,
-    STATE_TETRIS,
-    STATE_ARKANOID,
-    STATE_SLEEP,
-    STATE_GAMEOVER
-} curstate = STATE_SLEEP;
-
-/* Called when systick fires */
-void sys_tick_handler(void){
-    ++Tms;
-}
-
-#define USBBUFSZ    (127)
-// usb getline
-static char *get_USB(){
-    static char tmpbuf[USBBUFSZ+1], *curptr = tmpbuf;
-    static int rest = USBBUFSZ;
-    int x = USB_receive(curptr);
-    curptr[x] = 0;
-    if(!x) return NULL;
-    if(curptr[x-1] == '\n'){
-        curptr = tmpbuf;
-        rest = USBBUFSZ;
-        return tmpbuf;
-    }
-    curptr += x; rest -= x;
-    if(rest <= 0){ // buffer overflow
-        curptr = tmpbuf;
-        rest = USBBUFSZ;
-        USB_send("USB buffer overflow\n");
-    }
-    return NULL;
-}
-
-static void process_menu(){
-    switch(menu_activated()){
-        case MENU_SLEEP:
-            USB_send("Select 'Sleep'\n");
-            ScreenOFF();
-            curstate = STATE_SLEEP;
-        break;
-        case MENU_BALLS:
-            USB_send("Select 'Balls'\n");
-            if(balls){
-                balls = 0;
-            }else{
-                curstate = STATE_SLEEP;
-                balls_init();
-                balls = 1;
-            }
-        break;
-        case MENU_SNAKE:
-            USB_send("Select 'Snake'\n");
-            snake_init();
-            curstate = STATE_SNAKE;
-        break;
-        case MENU_TETRIS:
-            USB_send("Select 'Tetris'\n");
-            tetris_init();
-            curstate = STATE_TETRIS;
-        break;
-        case MENU_ARKANOID:
-            USB_send("Select 'Arkanoid'\n");
-            arkanoid_init();
-            curstate = STATE_ARKANOID;
-        default:
-        break;
-    }
-}
-
-static void gotomenu(){
-    curstate = STATE_MENU;
-    clear_events();
-    show_menu();
-}
-
-int main(void){
-    uint32_t lastT = 0;
-    sysreset();
-    StartHSE();
-    SysTick_Config(72000);
-    RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
-
-    hw_setup();
-    USBPU_OFF();
-    adc_setup();
-    USB_setup();
-    //iwdg_setup();
-    USBPU_ON();
-
-    keyevent evt;
-    while(1){
-        if(Tms - lastT > 499){
-            LED_blink(LED0);
-            lastT = Tms;
-        }
-        IWDG->KR = IWDG_REFRESH;
-        if(balls) process_balls();
-        process_keys();
-        switch(curstate){
-            case STATE_SLEEP:
-                if(keystate(KEY_M, &evt) && evt == EVT_RELEASE){
-                    USB_send("Activate menu\n");
-                    gotomenu();
-                }
-            break;
-            case STATE_MENU:
-                process_menu();
-                if(Tms - lastUnsleep > AUTOSLEEP_TMOUT){
-                    USB_send("Autosleep\n");
-                    ScreenOFF();
-                    curstate = STATE_SLEEP;
-                }
-            break;
-            case STATE_SNAKE:
-                if(!snake_proces()){
-                    show_gameover();
-                    curstate = STATE_GAMEOVER;
-                }
-            break;
-            case STATE_TETRIS:
-                if(!tetris_process()){
-                    show_gameover();
-                    curstate = STATE_GAMEOVER;
-                }
-            break;
-            case STATE_ARKANOID:
-                if(!arkanoid_process()){
-                    show_gameover();
-                    curstate = STATE_GAMEOVER;
-                }
-            break;
-            case STATE_GAMEOVER: // show gameover screen
-                if(keystate(KEY_M, &evt) && evt == EVT_RELEASE){
-                    gotomenu();
-                }else if(Tms - lastUnsleep > AUTOSLEEP_TMOUT){
-                    USB_send("Autosleep\n");
-                    ScreenOFF();
-                    curstate = STATE_SLEEP;
-                }
-            break;
-        }
-
-        usb_proc();
-        char *txt; const char *ans;
-        if((txt = get_USB())){
-            ans = parse_cmd(txt);
-            if(ans) USB_send(ans);
-        }
-    }
-    return 0;
-}
-
diff --git a/F1-nolib/Tetris/main.c b/F1-nolib/Tetris/main.c
new file mode 120000
index 0000000..ef1f2e9
--- /dev/null
+++ b/F1-nolib/Tetris/main.c
@@ -0,0 +1 @@
+/home/eddy/Yandex.Disk/Projects/mytakepic/.hg/wcache/checklink-target
\ No newline at end of file
diff --git a/F1-nolib/USB_HID/usbhid103.bin b/F1-nolib/USB_HID/usbhid103.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/chronometer/chrono.bin b/F1-nolib/chronometer/chrono.bin
old mode 100644
new mode 100755
diff --git a/F1-nolib/chronometer_v2/chrono.bin b/F1-nolib/chronometer_v2/chrono.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/chronometer_v3/chrono.bin b/F1-nolib/chronometer_v3/chrono.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/inc/cm/core_cmFunc.h b/F1-nolib/inc/cm/core_cmFunc.h
index a1bd88c..bdc54e6 100644
--- a/F1-nolib/inc/cm/core_cmFunc.h
+++ b/F1-nolib/inc/cm/core_cmFunc.h
@@ -453,7 +453,7 @@ __attribute__( ( always_inline ) ) __STATIC_INLINE uint32_t __get_MSP(void)
  */
 __attribute__( ( always_inline ) ) __STATIC_INLINE void __set_MSP(uint32_t topOfMainStack)
 {
-  __ASM volatile ("MSR msp, %0\n" : : "r" (topOfMainStack) : "sp");
+  __ASM volatile ("MSR msp, %0\n" : : "r" (topOfMainStack));
 }
 
 
diff --git a/F1-nolib/led_blink/blink.bin b/F1-nolib/led_blink/blink.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/pl2303_snippet/pl2303.bin b/F1-nolib/pl2303_snippet/pl2303.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/pl2303_snippet_naked/pl2303.bin b/F1-nolib/pl2303_snippet_naked/pl2303.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/pwmdmatest/pwmtest.bin b/F1-nolib/pwmdmatest/pwmtest.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/pwmtest/pwmtest.bin b/F1-nolib/pwmtest/pwmtest.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/uart/uart.bin b/F1-nolib/uart/uart.bin
old mode 100755
new mode 100644
diff --git a/F1-nolib/ws2815/ws2815.bin b/F1-nolib/ws2815/ws2815.bin
old mode 100755
new mode 100644
diff --git a/F1/1_wire/onewire.bin b/F1/1_wire/onewire.bin
old mode 100755
new mode 100644
diff --git a/F1/2.8TFT/dma_gpio.bin b/F1/2.8TFT/dma_gpio.bin
old mode 100755
new mode 100644
diff --git a/F1/DMA_GPIO/dma_gpio.bin b/F1/DMA_GPIO/dma_gpio.bin
old mode 100755
new mode 100644
diff --git a/F1/GPIO_TIM/tim_gpio.bin b/F1/GPIO_TIM/tim_gpio.bin
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