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100 lines
1.7 KiB
100 lines
1.7 KiB
//
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// Created by MightyPork on 2017/02/10.
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//
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#include <stm8s.h>
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#include "bootstrap.h"
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/** Global time base */
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volatile uint16_t time_ms;
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/**
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* Putchar for printf
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* @param c - char to print
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*/
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void putchar(char c)
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{
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while ((UART1->SR & UART1_SR_TXE) == 0);
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UART1->DR = (u8)c;
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}
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/**
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* Init for the chinese STM8 board
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* - enable LED
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* - enable UART @ 115200
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* - set up UART rx irq
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*/
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void SimpleInit(void)
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{
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// Disable default div/8 HSI prescaller
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CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);
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// LED
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GPIO_Init(GPIOB, GPIO_PIN_5, GPIO_MODE_OUT_PP_HIGH_FAST);
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// UART init & enable IRQ
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UART_SimpleInit(UART_BAUD_115200);
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UART1_ITConfig(UART1_IT_RXNE_OR, ENABLE);
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// Timebase generation counter
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TIM4_UpdateRequestConfig(TIM4_UPDATESOURCE_REGULAR);
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TIM4_PrescalerConfig(TIM4_PRESCALER_128, TIM4_PSCRELOADMODE_IMMEDIATE);
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TIM4_SetAutoreload(0xFF);
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TIM4_ARRPreloadConfig(ENABLE);
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TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);
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TIM4_Cmd(ENABLE);
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enableInterrupts();
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}
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/**
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* @brief Timer4 Update/Overflow Interrupt routine.
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* @param None
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* @retval None
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*/
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INTERRUPT_HANDLER(TIM4_UPD_OVF_IRQHandler, 23)
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{
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time_ms++;
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TIM4_ClearITPendingBit(TIM4_IT_UPDATE);
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}
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/** Delay ms */
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void Delay(uint16_t ms)
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{
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uint16_t start = time_ms;
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uint16_t t2;
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while (1) {
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t2 = time_ms;
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if ((t2 - start) >= ms) {
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break;
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}
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}
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}
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/** Delay N seconds */
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void Delay_s(uint16_t s)
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{
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while (s != 0) {
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Delay(1000);
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s--;
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}
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}
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/**
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* UART1 RX Interrupt routine.
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*/
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INTERRUPT_HANDLER(UART1_RX_IRQHandler, 18)
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{
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if (UART1->SR & UART1_SR_RXNE) {
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UART_HandleRx(UART1->DR);
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}
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}
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// Comment out if custom rx handler is added
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#if 1
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void UART_HandleRx(char c)
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{
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// echo
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putchar(c);
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}
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#endif
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