#include "bsp_spwm_output.h"
uint16_t CCR1_Val ;
uint16_t CCR2_Val = 1500 ;
uint16_t CCR3_Val = 900;
static void TIM1_Mode_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/* GPIOA clocks enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* TIM1 clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA,&GPIO_InitStructure);
/* Connect TIM pins to AF6 */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_6);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_6);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_6);
/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Period =2999;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //ÉèÖÃÔ¤·ÖƵ£º²»Ô¤·ÖƵ£¬¼´Îª72MHz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //ÉèÖÃʱÖÓ·ÖƵϵÊý£º²»·ÖƵ(ÕâÀïÓò»µ½)
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1; //ÏòÉϼÆÊýģʽ
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
/*PWM1 Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //ÅäÖÃΪPWMģʽ1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR2_Val; //ÉèÖÃÌø±äÖµ£¬µ±¼ÆÊýÆ÷¼ÆÊýµ½Õâ¸öֵʱ£¬µçƽ·¢ÉúÌø±ä
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //µ±¶¨Ê±Æ÷¼ÆÊýֵСÓÚCCR1_ValʱΪ¸ßµçƽ
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set;
TIM_OC2Init(TIM1, &TIM_OCInitStructure); //ʹÄÜͨµÀ1
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig( TIM1,ENABLE);
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR3_Val;
TIM_OC3Init(TIM1, &TIM_OCInitStructure); //ʹÄÜͨµÀ4
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig( TIM1,ENABLE);
TIM_ARRPreloadConfig( TIM1,ENABLE);
TIM_UpdateRequestConfig( TIM1, TIM_UpdateSource_Regular);
TIM_ITConfig(TIM1,TIM_IT_Update | TIM_IT_Trigger,ENABLE);/* TIM3 enable counter */
TIM_Cmd(TIM1, ENABLE); //ʹÄܶ¨Ê±Æ÷3
TIM_ClearFlag(TIM1, TIM_FLAG_Update);
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn; //TIM1ÖжÏ
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 6;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM1_SPWM_Init(void)
{
TIM1_Mode_Config();
NVIC_Configuration();
} // /*****/ |
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