求助，STM32如何用两个定时器产生两路不同频率的PWM，我同时开启了两个定时器，但是主函数调用若写在while(1)中只显示一路，另一路不正常，while（1）去掉就正常

yinzongbo123 · 发表于 2015-7-26 22:48:37

求助，STM32如何用两个定时器产生两路不同频率的PWM，我同时开启了两个定时器，但是主函数调用若写在while(1)中只显示一路，另一路不正常，while（1）去掉就正常。可是要求必须要在while（1）里

[mw_shl_code=c,true]#include "PWM_out.h" //TIM3????PWM?????????????÷??????????????4?·PWM void TIM3_GPIO_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3|RCC_APB1Periph_TIM2,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); //RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); GPIO_InitStructure.GPIO_Pin= GPIO_Pin_6|GPIO_Pin_1;//PA6??TIM3??ch1,PA1??TIM2??ch2 GPIO_InitStructure.GPIO_Mode= GPIO_Mode_AF_PP; //???ì???? GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz; GPIO_Init(GPIOA,&GPIO_InitStructure); } void TIM3_Mode_Config(u16 CCR1_Val) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_TimeBaseStructure.TIM_Period=36000; TIM_TimeBaseStructure.TIM_Prescaler=0; TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure); //?????·PWM?è?? TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse=CCR1_Val; TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High; TIM_OC1Init(TIM3,&TIM_OCInitStructure); //?????¨??1 TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Enable); TIM_ARRPreloadConfig(TIM3,ENABLE); TIM_Cmd(TIM3,ENABLE); } void TIM2_Mode_Config(u16 CCR2_Val) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_TimeBaseStructure.TIM_Period=1199; TIM_TimeBaseStructure.TIM_Prescaler=1199; TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure); //?????·PWM?è?? TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse=CCR2_Val; TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High; TIM_OC2Init(TIM2,&TIM_OCInitStructure); //?????¨??2 TIM_OC2PreloadConfig(TIM2,TIM_OCPreload_Enable); TIM_ARRPreloadConfig(TIM2,ENABLE); TIM_Cmd(TIM2,ENABLE); } [/mw_shl_code]

主函数是

[mw_shl_code=c,true]#include "stm32f10x.h" #include "PWM_out.h" int main() { TIM3_GPIO_Config(); TIM3_Mode_Config(18000);//PA6???ú?è?? TIM2_Mode_Config(600);//PA1???ú?è?? }[/mw_shl_code]

求助，跪求