59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
#include <stm32f10x.h>
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#include <core_cm3.h>
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#include <stm32f10x_rcc.h>
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#include <misc.h>
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#include <stm32f10x_tim.h>
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#include "delay.h"
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volatile uint8_t done;
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void delay_init() {
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TIM_TimeBaseInitTypeDef ts;
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// TIM3 @ APB1 -> 6MHz WTF?!
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM3, DISABLE);
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ts.TIM_Prescaler = 6 - 1;
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ts.TIM_CounterMode = TIM_CounterMode_Up;
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ts.TIM_Period = 0;
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ts.TIM_ClockDivision = TIM_CKD_DIV1;
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ts.TIM_RepetitionCounter = 0;
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TIM_TimeBaseInit(TIM3,&ts);
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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_InitStructure; //create NVIC structure
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NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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TIM_Cmd(TIM3, DISABLE);
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}
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void _delay_us(uint16_t us, uint8_t precise) {
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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 = 0;
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while(!done){
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}
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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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while(ms-- > 0){
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_delay_us(1000, 0);
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}
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}
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void TIM3_IRQHandler(void) {
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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 = 1;
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}
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}
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