kopia lustrzana https://github.com/mikaelnousiainen/RS41ng
68 wiersze
1.5 KiB
C
68 wiersze
1.5 KiB
C
#include <stdbool.h>
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#include <stm32f10x.h>
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#include <stm32f10x_rcc.h>
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#include <stm32f10x_tim.h>
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#include <misc.h>
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#include "delay.h"
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volatile bool done;
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void delay_init()
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{
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TIM_DeInit(TIM3);
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TIM_TimeBaseInitTypeDef tim_init;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM3, DISABLE);
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// The delay timer assumes a 24 MHz clock source
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tim_init.TIM_Prescaler = 24 - 1;
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tim_init.TIM_CounterMode = TIM_CounterMode_Up;
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tim_init.TIM_Period = 0;
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tim_init.TIM_ClockDivision = TIM_CKD_DIV1;
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tim_init.TIM_RepetitionCounter = 0;
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TIM_TimeBaseInit(TIM3, &tim_init);
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TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
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TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
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NVIC_InitTypeDef nvic_init;
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nvic_init.NVIC_IRQChannel = TIM3_IRQn;
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nvic_init.NVIC_IRQChannelPreemptionPriority = 1;
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nvic_init.NVIC_IRQChannelSubPriority = 1;
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nvic_init.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&nvic_init);
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TIM_Cmd(TIM3, DISABLE);
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}
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void delay_us(uint16_t us)
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{
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TIM_Cmd(TIM3, DISABLE);
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TIM_SetAutoreload(TIM3, us);
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TIM_SetCounter(TIM3, 0);
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TIM_Cmd(TIM3, ENABLE);
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done = false;
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while (!done) {}
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TIM_Cmd(TIM3, DISABLE);
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}
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inline void delay_ms(uint32_t ms)
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{
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while (ms-- > 0) {
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delay_us(1000);
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}
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}
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void TIM3_IRQHandler(void)
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{
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if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) {
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TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
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done = true;
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}
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}
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