RS41_APRS/RS41HUP/delay.c
2022-10-08 12:32:56 +02:00

59 lines
1.4 KiB
C

#include <stm32f10x.h>
#include <core_cm3.h>
#include <stm32f10x_rcc.h>
#include <misc.h>
#include <stm32f10x_tim.h>
#include "delay.h"
volatile uint8_t done;
void delay_init() {
TIM_TimeBaseInitTypeDef ts;
// TIM3 @ APB1 -> 6MHz WTF?!
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM3, DISABLE);
ts.TIM_Prescaler = 6 - 1;
ts.TIM_CounterMode = TIM_CounterMode_Up;
ts.TIM_Period = 0;
ts.TIM_ClockDivision = TIM_CKD_DIV1;
ts.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM3,&ts);
TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
TIM_ITConfig(TIM3,TIM_IT_Update, ENABLE);
NVIC_InitTypeDef NVIC_InitStructure; //create NVIC structure
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_Cmd(TIM3, DISABLE);
}
void _delay_us(uint16_t us, uint8_t precise) {
TIM_Cmd(TIM3, DISABLE);
TIM_SetAutoreload(TIM3, us);
TIM_SetCounter(TIM3, 0);
TIM_Cmd(TIM3, ENABLE);
done = 0;
while(!done){
}
TIM_Cmd(TIM3, DISABLE);
}
inline void _delay_ms(uint32_t ms) {
while(ms-- > 0){
_delay_us(1000, 0);
}
}
void TIM3_IRQHandler(void) {
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) {
TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
done = 1;
}
}