#include "pwm.h"


void PWM_Init_TIM1(u16 Psc,u16 Per)
{
	GPIO_InitTypeDef GPIO_InitStruct;
	TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
	TIM_OCInitTypeDef TIM_OCInitStruct;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1 | RCC_APB2Periph_AFIO,ENABLE);//¿ªÆôʱÖÓ
	
	GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF_PP;//³õʼ»¯GPIO--PA8¡¢PA11Ϊ¸´ÓÃÍÆÍìÊä³ö
	GPIO_InitStruct.GPIO_Pin=GPIO_Pin_8 |GPIO_Pin_11;
	GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOA,&GPIO_InitStruct);
	
	TIM_TimeBaseStructInit(&TIM_TimeBaseInitStruct);//³õʼ»¯¶¨Ê±Æ÷¡£
	TIM_TimeBaseInitStruct.TIM_ClockDivision=TIM_CKD_DIV1;
	TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up;
	TIM_TimeBaseInitStruct.TIM_Period=Per;
	TIM_TimeBaseInitStruct.TIM_Prescaler=Psc;
	TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStruct);/TIM2
	
	TIM_OCInitStruct.TIM_OCMode=TIM_OCMode_PWM1;//³õʼ»¯Êä³ö±È½Ï
	TIM_OCInitStruct.TIM_OCPolarity=TIM_OCPolarity_High;
	TIM_OCInitStruct.TIM_OutputState=TIM_OutputState_Enable;
	TIM_OCInitStruct.TIM_Pulse=0;
	TIM_OC1Init(TIM1,&TIM_OCInitStruct);
	TIM_OC4Init(TIM1,&TIM_OCInitStruct);
	
	TIM_CtrlPWMOutputs(TIM1,ENABLE);
	
	TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
	TIM_OC4PreloadConfig(TIM1,TIM_OCPreload_Enable);
	TIM_ARRPreloadConfig(TIM1,ENABLE);
	TIM_Cmd(TIM1,ENABLE);
}