我这边按照您的库 改了一个代码 你测试一下;
/* Includes ------------------------------------------------------------------*/
#include <gd32f20x.h>
#include "systick.h"
#include <stdio.h>
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void TIM_Configuration(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Configure system clocks.
* @param None
* @retval None
*/
void RCC_Configuration(void)
{
/* GPIOA, GPIOB, GPIOC and AF clocks enable */
RCC_APB2PeriphClock_Enable( RCC_APB2PERIPH_GPIOA | RCC_APB2PERIPH_GPIOB |
RCC_APB2PERIPH_GPIOC | RCC_APB2PERIPH_AF, ENABLE);
}
/**
* @brief Configure the GPIO ports.
* @param None
* @retval None
*/
void GPIO_Configuration(void)
{
GPIO_InitPara GPIO_InitStructure;
/* Configure PC7 as PP output */
GPIO_InitStructure.GPIO_Pin = GPIO_PIN_7;
GPIO_InitStructure.GPIO_Mode = GPIO_MODE_OUT_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_50MHZ;
GPIO_Init(GPIOC,&GPIO_InitStructure);
/* Configure PA8 PA9 PA10(TIMER1 CH1 CH2 CH3) as alternate function */
GPIO_InitStructure.GPIO_Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10;
GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_50MHZ;
GPIO_Init(GPIOA,&GPIO_InitStructure);
/* Configure PB13 PB14 PB15(TIMER1 CH1N CH2N CH3N) as alternate function */
GPIO_InitStructure.GPIO_Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
GPIO_InitStructure.GPIO_Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_SPEED_50MHZ;
GPIO_Init(GPIOB,&GPIO_InitStructure);
}
/**
* @brief Configure the TIMER peripheral.
* @param None
* @retval None
*/
void TIM_Configuration(void)
{
/* -----------------------------------------------------------------------
TIMER1 Configuration to:
Generate 3 complementary PWM signals with 3 different duty cycles:
TIMER1CLK is fixed to SystemCoreClock, the TIMER1 Prescaler is equal
to 6000 so the TIMER1 counter clock used is 20KHz.
The Three Duty cycles are computed as the following description:
The channel 1 duty cycle is set to 25% so channel 1N is set to 75%.
The channel 2 duty cycle is set to 50% so channel 2N is set to 50%.
The channel 3 duty cycle is set to 75% so channel 3N is set to 25%.
----------------------------------------------------------------------- */
TIMER_BaseInitPara TIM_TimeBaseStructure;
TIMER_OCInitPara TIM_OCInitStructure;
/* TIMER1 clock enable */
RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_TIMER1, ENABLE);
/* TIMER1 configuration */
TIMER_DeInit(TIMER1);
TIM_TimeBaseStructure.TIMER_Prescaler = 5999;
TIM_TimeBaseStructure.TIMER_CounterMode = TIMER_COUNTER_UP;
TIM_TimeBaseStructure.TIMER_Period = 15999;
TIM_TimeBaseStructure.TIMER_ClockDivision = TIMER_CDIV_DIV1;
TIMER_BaseInit(TIMER1,&TIM_TimeBaseStructure);
/* CH1,CH2 and CH3 Configuration in PWM mode */
TIM_OCInitStructure.TIMER_OCMode = TIMER_OC_MODE_PWM1;
TIM_OCInitStructure.TIMER_OCPolarity = TIMER_OC_POLARITY_HIGH;
TIM_OCInitStructure.TIMER_OCNPolarity = TIMER_OCN_POLARITY_HIGH;
TIM_OCInitStructure.TIMER_OutputState = TIMER_OUTPUT_STATE_ENABLE;
TIM_OCInitStructure.TIMER_OutputNState = TIMER_OUTPUTN_STATE_ENABLE;
TIM_OCInitStructure.TIMER_OCIdleState = TIMER_OC_IDLE_STATE_RESET;
TIM_OCInitStructure.TIMER_Pulse = 3999;
TIMER_OC1_Init(TIMER1, &TIM_OCInitStructure);
TIMER_OC1_Preload(TIMER1,TIMER_OC_PRELOAD_DISABLE);
TIM_OCInitStructure.TIMER_Pulse = 7999;
TIMER_OC2_Init(TIMER1, &TIM_OCInitStructure);
TIMER_OC2_Preload(TIMER1,TIMER_OC_PRELOAD_DISABLE);
TIM_OCInitStructure.TIMER_Pulse = 11999;
TIMER_OC3_Init(TIMER1, &TIM_OCInitStructure);
TIMER_OC3_Preload(TIMER1,TIMER_OC_PRELOAD_DISABLE);
/* TIMER1 output enable */
TIMER_CtrlPWMOutputs(TIMER1,ENABLE);
/* Auto-reload preload enable */
TIMER_CARLPreloadConfig(TIMER1,ENABLE);
/* TIMER enable counter*/
TIMER_Enable( TIMER1, ENABLE );
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main()
{
RCC_Configuration();
GPIO_Configuration();
SysTick_Configuration();
TIM_Configuration();
while(1)
{
GPIO_SetBits(GPIOC,GPIO_PIN_7);
Delay_1ms(1000);
GPIO_ResetBits(GPIOC, GPIO_PIN_7);
Delay_1ms(1000);
}
}
这是测试PA8 -PB13引脚的波形图
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