#include "pwm.h"
#include "led.h"
//void TIM3_Int_Init(u16 arr,u16 psc)
//{
//TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
//NVIC_InitTypeDef NVIC_InitStructure;
//RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //①时钟 TIM3 使能
////定时器 TIM3 初始化
//TIM_TimeBaseStructure.TIM_Period = arr; //设置自动重装载寄存器周期的值
//TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置时钟频率除数的预分频值
//TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割
//TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM 向上计数
// TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //②初始化 TIM3
//TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //③允许更新中断
////中断优先级 NVIC 设置
//NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3 上升中断
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级 0 级
//NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级 3 级
//NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ 通道被使能
//NVIC_Init(&NVIC_InitStructure); //④初始化 NVIC 寄存器
//TIM_Cmd(TIM3, ENABLE); //⑤使能 TIM3
//}
//定时器 3 中断服务程序⑥
//void TIM3_IRQHandler(void) //TIM3 中断
//{
//if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查 TIM3 更新中断发生与否
//{
//TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除 TIM3 更新中断标志
//LED1=!LED1;
//}
//}
void TIM3_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitSture;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //①使能 TIM3时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO,ENABLE);//①使能 GPIO 和 AFIO 复用功能时钟
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9;//端口配置 led0=PC8 led1=PC9
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;//复用推挽
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;//
GPIO_Init(GPIOC,&GPIO_InitStructure);//初始化GPIO
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_6|GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOC,&GPIO_InitStructure);
//映射
GPIO_PinRemapConfig( GPIO_FullRemap_TIM3 ,ENABLE);//映射
//定时器TIM3初始化
TIM_TimeBaseStructure.TIM_Period = arr; //设置自动重装载寄存器周期的值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1; //设置时钟分割
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM 向上计数
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);//初始化 TIN3
//初始化TIM3 PWM模式
TIM_OCInitSture.TIM_OCMode=TIM_OCMode_PWM1;//选择 PWM 模式 1
TIM_OCInitSture.TIM_OutputState=TIM_OutputState_Enable;//比较输出使能
TIM_OCInitSture.TIM_OCPolarity=TIM_OCPolarity_High;//输出极性高
TIM_OC3Init(TIM3,&TIM_OCInitSture);//④初始化外设 TIM3 OC3
TIM_OCInitSture.TIM_OCMode=TIM_OCMode_PWM1;
TIM_OCInitSture.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitSture.TIM_OCPolarity= TIM_OCPolarity_High;
TIM_OC4Init(TIM3,&TIM_OCInitSture);//④初始化外设 TIM3 OC4
TIM_OC3PreloadConfig( TIM3,TIM_OCPreload_Enable);//使能预装载寄存器
TIM_OC4PreloadConfig( TIM3,TIM_OCPreload_Enable);
TIM_Cmd(TIM3, ENABLE); //⑤使能 TIM3
}
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