谁知道GD32的输入如捕获功能如何初始化

bigbat

谁知道GD32的输入如捕获功能如何初始化 [复制链接]

下面的代码是我依照网上的资料编写的GD32F303CBT6的输入捕获功能，使用的是PA0，和TIME4_CH0,PA0引脚已经输入1KHZ的50%的信号。

#include "gd32f30x.h"
#include "gd32f303c_start.h"
#include "systick.h"


void timer_config4(void);
/*!
    \brief      main function
    \param[in]  none
    \param[out] none
    \retval     none
*/

int main(void)
{
    /* configure systick */
    systick_config();
    
    /* enable the LEDs GPIO clock */
    rcu_periph_clock_enable(RCU_GPIOB);
    /* configure LED1 LED2 GPIO port */
    gpio_init(GPIOB, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_1);
    /*Configure PA0(TIMER4_CH0) as alternate function*/
	  gpio_init(GPIOA, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_0);
		timer_config4();
    /* reset LED1 LED2 GPIO pin */
    gpio_bit_reset(GPIOB, GPIO_PIN_1);

    while(1){

        gpio_bit_set(GPIOB, GPIO_PIN_1);
        delay_1ms(1000);
        gpio_bit_reset(GPIOB, GPIO_PIN_1);
        delay_1ms(1000);
    }
}

/**
    \brief      configure the TIMER peripheral
    \param[in]  none
    \param[out] none
    \retval     none
  */
void timer_config4(void)
{
    
	  
	  /* TIMER1 configuration: generate PWM signals with different duty cycles:
       TIMER1CLK = SystemCoreClock / 120 = 1MHz */
    timer_ic_parameter_struct timer_icinitpara;
    timer_parameter_struct timer_initpara;

		/* connect IRC40K clock to the TIMER4_CH3 input for calibration */
		//rcu_periph_clock_enable(RCU_AF);
		//gpio_pin_remap_config(GPIO_TIMER4CH3_IREMAP, ENABLE);
		rcu_periph_clock_enable(RCU_TIMER4);
		timer_deinit(TIMER4);
	
	  nvic_priority_group_set(NVIC_PRIGROUP_PRE1_SUB3);
    nvic_irq_enable(TIMER4_IRQn, 1, 1);     
		/* initialize TIMER init parameter struct */
		timer_struct_para_init(&timer_initpara);
		/* TIMER4 configuration */
		timer_initpara.prescaler = 71;
		timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
		timer_initpara.counterdirection = TIMER_COUNTER_UP;
		timer_initpara.period = 0xFFFF;
		timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
		timer_init(TIMER4, &timer_initpara);

		/* TIMER4 configuration */
		/* initialize TIMER channel input parameter struct */
		timer_channel_input_struct_para_init(&timer_icinitpara);
		/* TIMER4 CH3 input capture configuration */
		timer_icinitpara.icpolarity = TIMER_IC_POLARITY_FALLING;
		timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI;
		timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1;
		timer_icinitpara.icfilter = 0x0;
		timer_input_capture_config(TIMER4, TIMER_CH_0, &timer_icinitpara);
		
		
		/* auto-reload preload enable */
		timer_auto_reload_shadow_enable(TIMER4);
		/* clear channel 3 interrupt bit */
		//timer_interrupt_flag_clear(TIMER4, TIMER_INT_FLAG_CH0);
		timer_interrupt_flag_clear(TIMER4, TIMER_INT_CH0);
		/* channel 3 interrupt enable */
		timer_interrupt_enable(TIMER4, TIMER_INT_CH0);
		/* TIMER4 counter enable */
		timer_enable(TIMER4);

}

中断代码

void TIMER4_IRQHandler(void)
{
		 if(SET == timer_interrupt_flag_get(TIMER4, TIMER_INT_CH0)){
			 /* clear channel 3 interrupt bit */
			 timer_interrupt_flag_clear(TIMER4, TIMER_INT_CH0);
			 timer_capture_num++;
		 if(1 == timer_capture_num){
					/* get the input capture value */
					timer_capture1 = timer_channel_capture_value_register_read(TIMER4,TIMER_CH_0);
		 }else if(2 == timer_capture_num){
					/* get the input capture value */
					timer_capture2 = timer_channel_capture_value_register_read(TIMER4,TIMER_CH_0);
					/* end capture, disable TIMER4 and CH3 interrupt */
					timer_interrupt_disable(TIMER4, TIMER_INT_CH0);
					timer_disable(TIMER4);
				}
		 }
}

该程序运行后就是无法进入中断，请做过的高手指点一下。

 

恩佐法拉利

从代码上看是没有开启中断

bigbat

恩佐法拉利 发表于 2022-11-3 17:36 从代码上看是没有开启中断

你好，请问是什么中断，整个系统的中断已经开启了。

 nvic_priority_group_set(NVIC_PRIGROUP_PRE1_SUB3);
 nvic_irq_enable(TIMER4_IRQn, 1, 1); 

TIME4的中断也已经开了

 

lugl4313820

官方已经有例程的吧。

秦天qintian0303

rcu_periph_clock_enable(RCU_AF);AF功能使能了吗？