潘多拉BSP采用rtt4.04，encoder功能和lcd（spi3）有冲突

发布于 2021-06-01 17:51:58 浏览：972 订阅该版

main里面的代码如下：
```c
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>

/* defined the LED0 pin: PE7 */
#define LED0_PIN    GET_PIN(E, 7)
#define PULSE_CH1   GET_PIN(C, 7)
#define PULSE_CH2   GET_PIN(C, 6)

/*
 * 程序清单：这是一个脉冲编码器设备使用例程
 * 例程导出了 pulse_encoder_sample 命令到控制终端
 * 命令调用格式：pulse_encoder_sample
 * 程序功能：每隔 500 ms 读取一次脉冲编码器外设的计数值，然后清空计数值，将读取到的计数值打印出来。
 *原文链接：https://blog.csdn.net/qq_41285788/article/details/102729020
*/

#define PULSE_ENCODER_DEV_NAME    "pulse8"    /* 脉冲编码器名称，这里用的是 time8 ，PC6,PC7 */
rt_err_t ret = RT_EOK;
rt_device_t pulse_encoder_dev = RT_NULL;   /* 脉冲编码器设备句柄 */
rt_int32_t count;
rt_int32_t openok=0;

//static int pulse_encoder_sample(int argc, char *argv[])
  static int pulse_encoder_sample(void)
{
    /* 查找脉冲编码器设备 */
    pulse_encoder_dev = rt_device_find(PULSE_ENCODER_DEV_NAME);
    if (pulse_encoder_dev == RT_NULL)
    {
        rt_kprintf("pulse encoder sample run failed! can't find %s device!\n", PULSE_ENCODER_DEV_NAME);
        return RT_ERROR;
			  openok=0;
    }

/* 以只读方式打开设备 */
    ret = rt_device_open(pulse_encoder_dev, RT_DEVICE_OFLAG_RDONLY);
    if (ret != RT_EOK)
    {
        rt_kprintf("open %s device failed!\n", PULSE_ENCODER_DEV_NAME);
			  openok=0;
        return ret;
    }else
		{
				rt_kprintf("open %s device success!\n", PULSE_ENCODER_DEV_NAME);
			  openok=1;
		}

//  for(rt_uint32_t i = 0; i <= 50; i++)
//		while(1)
  //  {
  //      rt_thread_mdelay(10);
  //      /* 读取脉冲编码器计数值 */
    //    rt_device_read(pulse_encoder_dev, 0, &count, 1);
      //  /* 清空脉冲编码器计数值 */
        //rt_device_control(pulse_encoder_dev, PULSE_ENCODER_CMD_CLEAR_COUNT, RT_NULL);
       // rt_kprintf("get count %d\n",count);
   // }

//  rt_device_close(pulse_encoder_dev);
    return ret;
}
/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(pulse_encoder_sample, pulse encoder sample);

void irq_callback(void *args)
{
	 if(openok==1)
	 {
	      rt_device_read(pulse_encoder_dev, 0, &count, 1);
        /* 清空脉冲编码器计数值 */
        //rt_device_control(pulse_encoder_dev, PULSE_ENCODER_CMD_CLEAR_COUNT, RT_NULL);
        rt_kprintf("get count %d , %d \n", count,count/4);
	 }
	 else
	 {
		 rt_kprintf("please first run cmd of 'pulse_encoder_sample' to open port in MSH\n");
	 }
}

int main(void)
{
    /* set LED0 pin mode to output */
    rt_pin_mode(LED0_PIN, PIN_MODE_OUTPUT);
	
	
	  rt_pin_mode(PULSE_CH1,PIN_MODE_INPUT);
	  rt_pin_mode(PULSE_CH2,PIN_MODE_INPUT);

rt_pin_attach_irq(PULSE_CH1, PIN_IRQ_MODE_RISING, irq_callback, (void *)PULSE_CH1);
	  rt_pin_attach_irq(PULSE_CH1, PIN_IRQ_MODE_FALLING, irq_callback, (void *)PULSE_CH1);
	  rt_pin_attach_irq(PULSE_CH2, PIN_IRQ_MODE_RISING, irq_callback, (void *)PULSE_CH2);
	  rt_pin_attach_irq(PULSE_CH2, PIN_IRQ_MODE_FALLING, irq_callback, (void *)PULSE_CH2);

rt_pin_irq_enable(PULSE_CH1, PIN_IRQ_ENABLE);
	  rt_pin_irq_enable(PULSE_CH2, PIN_IRQ_ENABLE);
	  
	  pulse_encoder_sample();

while (1)
    {
        rt_pin_write(LED0_PIN, PIN_HIGH);
        rt_thread_mdelay(500);
        rt_pin_write(LED0_PIN, PIN_LOW);
        rt_thread_mdelay(500);
    }
}
```
当把lcd对应的SPI打开时，编码器计数变得非常迟钝，如果在ENV里面关闭LCD和spi以及spi3，则恢复正常。不知道是哪里冲突？请教下该如何解决？非常感谢