mirror of
https://github.com/eddyem/STM8_samples.git
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141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*
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* blinky.c
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*
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* Copyright 2014 Edward V. Emelianoff <eddy@sao.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include "ports_definition.h"
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#include "interrupts.h"
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#include "uart.h"
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volatile unsigned long Global_time = 0L; // global time in ms
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/*
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LED channels:
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0 - D3
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1 - D2
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2 - D1
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3 - C7
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4 - C6
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5 - C5
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6 - C4
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7 - C3
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*/
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/* don't work!
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static U8* LEDODRS[8] = {(U8*)0x500F, &PD_ODR, &PD_ODR, &PC_ODR, &PC_ODR, &PC_ODR, &PC_ODR, &PC_ODR};
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static const U8 LEDPINS[8] = {1<<3, 1<<2, 1<<1, 1<<7, 1<<6, 1<<5, 1<<4, 1<<3};
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*/
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int main() {
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unsigned long T = 0L;
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U8 rb;
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CFG_GCR |= 1; // disable SWIM
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// Configure clocking
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CLK_CKDIVR = 0; // F_HSI = 16MHz, f_CPU = 16MHz
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// TIM1 - system timer (1ms)
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TIM1_PSCRH = 0;
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TIM1_PSCRL = 15; // LSB should be written last as it updates prescaler
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// auto-reload each 1ms: TIM_ARR = 1000 = 0x03E8
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TIM1_ARRH = 0x03;
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TIM1_ARRL = 0xE8;
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// interrupts: update
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TIM1_IER = TIM_IER_UIE;
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// auto-reload + interrupt on overflow + enable
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TIM1_CR1 = TIM_CR1_APRE | TIM_CR1_URS | TIM_CR1_CEN;
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// leds - pushpull
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PD_DDR = 0x0e;
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PC_DDR = 0xf8;
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PD_CR1 = 0x0e;
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PC_CR1 = 0xf8;
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PORT(LED_PORT, DDR) |= LED_PIN;
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PORT(LED_PORT, CR1) |= LED_PIN;
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uart_init();
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// enable all interrupts
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enableInterrupts();
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// Loop
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do{
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if(Global_time - T > 499){
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T = Global_time;
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PORT(LED_PORT, ODR) ^= LED_PIN; // blink on-board LED
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}
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if(uart_read_cmd(&rb)){ // buffer isn't empty
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switch(rb){
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case '1':
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PD_ODR |= (1<<3);
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break;
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case '2':
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PD_ODR |= (1<<2);
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break;
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case '3':
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PD_ODR |= (1<<1);
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break;
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case '4':
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PC_ODR |= (1<<7);
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break;
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case '5':
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PC_ODR |= (1<<6);
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break;
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case '6':
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PC_ODR |= (1<<5);
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break;
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case '7':
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PC_ODR |= (1<<4);
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break;
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case '8':
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PC_ODR |= (1<<3);
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break;
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case 'A':
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PD_ODR &= ~(1<<3);
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break;
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case 'B':
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PD_ODR &= ~(1<<2);
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break;
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case 'C':
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PD_ODR &= ~(1<<1);
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break;
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case 'D':
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PC_ODR &= ~(1<<7);
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break;
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case 'E':
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PC_ODR &= ~(1<<6);
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break;
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case 'F':
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PC_ODR &= ~(1<<5);
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break;
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case 'G':
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PC_ODR &= ~(1<<4);
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break;
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case 'H':
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PC_ODR &= ~(1<<3);
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break;
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case '9':
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PD_ODR |= 0x0e;
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PC_ODR |= 0xf8;
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break;
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case 'I':
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PD_ODR &= ~0x0e;
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PC_ODR &= ~0xf8;
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break;
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}
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}
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}while(1);
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}
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