查了很多资料,但是在逻辑分析仪里怎么也没有波形,都快疯了,大家帮忙看看 谢谢。这是程序
#include "
STM32f10x.h"
#include "rcc_init.h"
vu16 CCR1_Val = 40000;
vu16 CCR2_Val = 20000;
vu16 CCR3_Val = 10000;
vu16 CCR4_Val = 5000;
void RCC_Configura
tion(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void TIM_Configuration(void);
int main(void)
{
RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
TIM_Configuration();
while (1);
}
void RCC_Configuration(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseStructure.TIM_Period = 65535;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2 , &TIM_TimeBaseStructure);
TIM_PrescalerConfig(TIM2 , 3199 , TIM_PSCReloadMode_Immediate);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse = CCR3_Val;
TIM_OC3Init(TIM2, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
TIM_OC4Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2 , TIM_OCPreload_Disable);
TIM_OC2PreloadConfig(TIM2 , TIM_OCPreload_Disable);
TIM_OC3PreloadConfig(TIM2 , TIM_OCPreload_Disable);
TIM_OC4PreloadConfig(TIM2 , TIM_OCPreload_Disable);
TIM_ITConfig(TIM2 , TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4 , ENABLE);
TIM_Cmd(TIM2 , ENABLE);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
这是中断程序
void TIM2_IRQHandler(void)
{
u16 capture = 0;
if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_CC1 );
capture = TIM_GetCapture1(TIM2);
TIM_SetCompare1(TIM2, capture + CCR1_Val );
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);
capture = TIM_GetCapture2(TIM2);
TIM_SetCompare2(TIM2, capture + CCR2_Val);
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_CC3);
capture = TIM_GetCapture3(TIM2);
TIM_SetCompare3(TIM2, capture + CCR3_Val);
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC4) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);
capture = TIM_GetCapture4(TIM2);
TIM_SetCompare4(TIM2, capture + CCR4_Val);
}
}
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