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調(diào)試了多半天TIM1的中斷和PWM，終于算是調(diào)通了。遇到了不少問題，也深入了解了TIM1的配置過程。代碼如下：
#include "stm32f10x.h"
static __IO uint32_t TimingDelay; //__IO為volatile的宏定義
int8_t LED_Flag = 1; //LED燈翻轉(zhuǎn)標志位
void GPIO_Config(void);
void TIM_Config(void);
void NVIC_Config(void);
void Delay(__IO uint32_t nTime);
main ()
{
GPIO_Config();
TIM_Config();
NVIC_Config();
if (SysTick_Config(SystemCoreClock / 1000))
{
while (1);
}
while (1)
{
if (LED_Flag != 1)
{
GPIO_SetBits(GPIOG, GPIO_Pin_6); //setbits使能IO，當前下指輸出（此時為滅）
}
else
{
GPIO_ResetBits(GPIOG, GPIO_Pin_6); //Resetbits屏蔽IO，當前下指不輸出（此時為亮）
}
}
}
void GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG | RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB, ENABLE);
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //指定第六引腳
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; //模式為輸出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //頻率為快速
GPIO_Init(GPIOG, &GPIO_InitStructure); //調(diào)用IO初始化函數(shù)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_10 | GPIO_Pin_11; //指定復用引腳
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //模式必須為復用！
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //頻率為快速
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉與否對PWM產(chǎn)生無影響
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; //GPIOB_Pin13作為TIM1_CH1N輸出
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_TIM1); //復用GPIOA_Pin7為TIM1_Ch1N，效果不理想高電平不到0.5V
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_TIM1); //復用GPIOA_Pin8為TIM1_Ch1,
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_TIM1);//復用GPIOA_Pin10為TIM1_Ch3,
GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_TIM1);//復用GPIOA_Pin11為TIM1_Ch4,注意沒有CH4N
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_TIM1);//復用GPIOB_Pin13為TIM1_Ch1N,效果很好，可以和GPIOA_Pin7同時復用
}
void TIM_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
TIM_DeInit(TIM1);//初始化TIM1寄存器
TIM_TimeBaseStructure.TIM_Period = 10000-1; //查數(shù)據(jù)手冊可知，TIM1與TIM8為16位自動裝載
TIM_TimeBaseStructure.TIM_Prescaler = 16800-1; //分頻為10K
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上計數(shù)
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCStructInit(&TIM_OCInitStructure); //填入缺省值，其中后幾項只對TIM1和TIM8有效
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //PWM1為正常占空比模式，PWM2為反極性模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //輸出允許
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //互補輸出允許
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //High為占空比高極性，此時占空比為20%；Low則為反極性，占空比為80%
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;//互補輸出，與以上相反
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_Pulse = 2000; //輸入通道1 CCR1（占空比數(shù)值）
TIM_OC1Init(TIM1, &TIM_OCInitStructure); //Ch1初始化
TIM_OCInitStructure.TIM_Pulse = 4000;
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse = 7000;
TIM_OC4Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);//CCR自動裝載默認也是打開的
TIM_ARRPreloadConfig(TIM1, ENABLE); //ARR自動裝載默認是打開的，可以不設置
TIM_ClearFlag(TIM1, TIM_FLAG_Update);
TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM1, ENABLE); //使能TIM1定時器
TIM_CtrlPWMOutputs(TIM1, ENABLE);//使能TIM1的PWM輸出，TIM1與TIM8有效
}
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); //中斷優(yōu)先級分組為1
NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_TIM10_IRQn; //嵌套中斷通道為TIM1
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //搶占優(yōu)先級為1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //響應優(yōu)先級為0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能中斷
NVIC_Init(&NVIC_InitStructure);
}
void Delay(__IO uint32_t nTime)
{
TimingDelay = nTime;
while (TimingDelay != 0);
}
void TimingDelay_Decrement(void)
{
if (TimingDelay != 0x00)
{
TimingDelay--;
}
}
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