rt_hw_spi_device_attach 函数使用方法请教

发布于 2020-07-22 16:24:29 浏览：3362 订阅该版

我先用HAL库初始化了SPI2验证硬件都时正常的，可以正常收发。之后我想使用RTT自带的接口去调用SPI但是始终不成功，以下是我的使用方法，请哪位大神帮我指点一下。
```
这里输入代码

#include "SPI\SPI1.h"
#include "drv_spi.h"
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include <drv_qspi.h>
#include <rthw.h>
#include <finsh.h>

#define SPI2_DEVICE_NAME     "spi20"
#define SPI2_BUS_NAME     "spi2"
struct rt_spi_device *spi2_dev_ecat;
void SPI2_Init(void) 
{
	struct rt_spi_configuration cfg;
	
	if (rt_hw_spi_device_attach(SPI2_BUS_NAME,SPI2_DEVICE_NAME,GPIOD,GPIO_PIN_4)!= RT_EOK)
	{
		LOG_E("spi2 bud attach error");
		return;
	}
	
	/* 查找 spi 设备获取设备句柄 */
	spi2_dev_ecat = (struct rt_spi_device *)rt_device_find(SPI2_DEVICE_NAME);
	if (!spi2_dev_ecat)
	{
			LOG_E("spi2 run failed! can't find %s device!\n", SPI2_DEVICE_NAME);
			return;
	}

cfg.data_width = 8;
  cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_3 | RT_SPI_MSB ; /* SPI Compatible: Mode 0. */
  cfg.max_hz =  1000000; /* 10M */
  if (rt_spi_configure(spi2_dev_ecat, &cfg)!= RT_EOK)
	{
		LOG_E("spi2 configure error");
		return;
	};	
	rt_kprintf("spi2 ini success\n");
}

uint8_t WR_CMD (uint8_t cmd)  
{ 	
		uint8_t Temp=0;
		rt_spi_transfer(spi2_dev_ecat,&cmd,&Temp,1);    
		return Temp;	
}
```
收发数据始终不对。是不是我哪里弄错了？？