2019年03月07日 | STM32之高级定时器互补输出

#include "stm32f10x.h"

/* RCC时钟配置 */

void RCC_config(void)

{ 

ErrorStatus HSEStartUpStatus;

/* RCC寄存器设置为默认配置 */

RCC_DeInit();

/* 打开外部高速时钟 */

RCC_HSEConfig(RCC_HSE_ON);

/* 等待外部高速时钟稳定 */

HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS) 

{ 

/* 设置HCLK = SYSCLK */

RCC_HCLKConfig(RCC_SYSCLK_Div1);

/* 设置PCLK2 = HCLK */

RCC_PCLK2Config(RCC_HCLK_Div1);

/* 设置PCLK1 = HCLK / 2 */

RCC_PCLK1Config(RCC_HCLK_Div2);

// /* 设置FLASH代码延时 */

// FLASH_SetLatency(FLASH_Latency_2);

// /* 使能预取址缓存 */

// FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

/* 设置PLL时钟源为HSE倍频9 72MHz */

RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

/* 使能PLL */

RCC_PLLCmd(ENABLE);

/* 等待PLL稳定 */

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);

/* 设置PLL为系统时钟源 */

RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

/* 等待系统时钟源切换到PLL */

while(RCC_GetSYSCLKSource() != 0x08);

}

}

/* GPIO配置 */

void GPIO_config(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

/* 使能GPIOA时钟 */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);

GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1, ENABLE);

/* 将GPIOA时钟设置为默认参数 */

GPIO_DeInit(GPIOA);

/* 复用推挽输出 */

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

/* 第7、8引脚 */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8;

/* 输出频率50MHz */

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

/* 初始化GPIOA 7、8 */

GPIO_Init(GPIOA, &GPIO_InitStructure);

}

/* 定时器配置 */

void TIMER_config(void)

{

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;

TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

/* 允许TIM1的时钟 */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

/* 将定时器1寄存器设为初始值 */

TIM_DeInit(TIM1);

/* 设置定时器1由内部时钟 */

TIM_InternalClockConfig(TIM1);

/* 预分频值 */

TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;

/* 时钟分割 */

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

/* 向上计数 */

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

/* 自动重载值 */

TIM_TimeBaseStructure.TIM_Period = 1000 - 1;

/* 循环次数 */

TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

/* 初始化定时器1 */

TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

/* PWM设置 */

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;

TIM_OCInitStructure.TIM_Pulse = 500;

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;

TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;

TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

TIM_OC1Init(TIM1, &TIM_OCInitStructure);

/* 设置死区 */

TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;

TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;

TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;

TIM_BDTRInitStructure.TIM_DeadTime = 0xFF;

TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;

TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;

TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;

TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

/* 开启定时器1 */

TIM_Cmd(TIM1, ENABLE);

/* PWM输出 */

TIM_CtrlPWMOutputs(TIM1, ENABLE);

}

/* 毫秒延时 */

void delay_ms(uint16_t time)

{    

uint16_t i = 0;

while(time--)

{

i = 12000;

while(i--);

}

}

int main(void)

{

/* 时钟配置 */

RCC_config();

/* GPIO配置 */

GPIO_config();

/* 定时器2配置 */

TIMER_config();

while(1)

{

delay_ms(1000);

}

}