具体程序如下。使用高级时钟1.将PA8和PB13使能为互补PWM输出引脚、结果PA8输出一直为低。请各位帮我看一下。谢谢！
#include "gd32f20x.h"
#include <stdio.h>
#include "systick.h"
int compare ;
void TIM8_init()
{
TIMER_BaseInitPara tim1_int;// ʱÖÓ1³õʼ»¯
TIMER_BKDTInitPara tim1_DT; //ʱÖÓ1ËÀÇøʱ¼ä
TIMER_OCInitPara tim1_OC; // ʱÖÓ1ͨµÀÉèÖÃ
tim1_int.TIMER_Period = 1200;// 120Mʱ¿ª¹ØƵÂÊ100k
tim1_int.TIMER_Prescaler = 0;//¶¨Ê±Æ÷ʱÖÓΪ120M
tim1_int.TIMER_ClockDivision = TIMER_CDIV_DIV1;//¶¨Ê±Æ÷ʱÖÓΪ120M
tim1_int.TIMER_CounterMode = TIMER_COUNTER_UP;//ÏòÉϼÆÊý
TIMER_BaseInit(TIMER1,&tim1_int);
//ÅäÖÃËÀÇøʱ¼ä ËÀÇøΪ0.1us
tim1_DT.TIMER_ROSState = TIMER_ROS_STATE_ENABLE;
tim1_DT.TIMER_IOSState = TIMER_IOS_STATE_ENABLE;
tim1_DT.TIMER_LOCKLevel = TIMER_LOCK_LEVEL_OFF;
tim1_DT.TIMER_DeadTime = 12;
tim1_DT.TIMER_Break = TIMER_BREAK_DISABLE;
tim1_DT.TIMER_BreakPolarity = TIMER_BREAK_POLARITY_LOW;
tim1_DT.TIMER_OutAuto = TIMER_OUTAUTO_DISABLE ;
TIMER_BKDTConfig(TIMER1,&tim1_DT);
//ÉèÖÃͨµÀ1£¬Í¨µÀ1N
tim1_OC.TIMER_OCMode = TIMER_OC_MODE_PWM1;//¼ÆÊýֵСÓÚÉ趨ֵΪÓÐЧµçƽ
tim1_OC.TIMER_OutputState = TIMER_OUTPUT_STATE_ENABLE;//Êä³ö±È½ÏʹÄÜ
tim1_OC.TIMER_OutputNState = TIMER_OUTPUTN_STATE_ENABLE;//Êä³ö±È½Ï·´ÏòʹÄÜ
tim1_OC.TIMER_Pulse = compare;//±È½ÏÖµ
tim1_OC.TIMER_OCPolarity = TIMER_OC_POLARITY_HIGH;//ÓÐЧµçƽΪ¸ßµçƽ
tim1_OC.TIMER_OCNPolarity = TIMER_OCN_POLARITY_HIGH;//ÓÐЧµçƽΪ¸ßµçƽ
tim1_OC.TIMER_OCIdleState = TIMER_OC_IDLE_STATE_SET;//¿ÕÏÐʱÒý½Å״̬
tim1_OC.TIMER_OCNIdleState = TIMER_OCN_IDLE_STATE_RESET;//¿ÕÏÐʱÒý½Å×´
TIMER_OC1_Init(TIMER1,&tim1_OC);
TIMER_OC1_Preload(TIMER1,TIMER_OC_PRELOAD_ENABLE);//×Ô¶¯×°ÔØʹÄÜ
TIMER_Enable(TIMER1,ENABLE);
TIMER_CtrlPWMOutputs(TIMER1,ENABLE);//¿ªÆôON£¬OCÊä³ö£¨BDTR£©
// TIMER_CC_PreloadControl(TIMER1,ENABLE);
}
void PWM_GPIO_init()
{
GPIO_InitPara GPIO_InitPara;
RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_TIMER1,ENABLE);
RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_GPIOA | RCC_APB2PERIPH_GPIOB, ENABLE);
GPIO_InitPara.GPIO_Pin = GPIO_PIN_8;
GPIO_InitPara.GPIO_Mode = GPIO_MODE_AF_PP;
GPIO_InitPara.GPIO_Speed = GPIO_SPEED_50MHZ;
GPIO_Init(GPIOA,&GPIO_InitPara);//ÅäÖÃPA7Ϊ¸´ÓÃÍÆÍì TM8-CH1N
GPIO_InitPara.GPIO_Pin = GPIO_PIN_13;
GPIO_InitPara.GPIO_Mode = GPIO_MODE_AF_PP;
GPIO_InitPara.GPIO_Speed = GPIO_SPEED_50MHZ;
GPIO_Init(GPIOB,&GPIO_InitPara);//ÅäÖÃPC6Ϊ¸´ÓÃÍÆÍì TM8-CH1
}
int main(void)
{
compare = 800;
TIM8_init();
PWM_GPIO_init();
while(1)
{
compare = 800;
TIMER_Compare1Config(TIMER1,compare);
}
}
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