RT-Thread SPI设备问题

发布于 2023-10-15 17:30:22 浏览：703 订阅该版

我想用SPI驱动W25QFLASH可是读取的FLASHid怎么都是错的，FLASH硬件接线没有问题，检查过很多边，所有的宏都打开了，第一个宏

```c
/*#define HAL_SDRAM_MODULE_ENABLED   */
/*#define HAL_SMARTCARD_MODULE_ENABLED   */
#define HAL_SPI_MODULE_ENABLED
/*#define HAL_SRAM_MODULE_ENABLED   */
/*#define HAL_TIM_MODULE_ENABLED   */
#define HAL_UART_MODULE_ENABLED
/*#define HAL_USART_MODULE_ENABLED   */
```

第二个宏

```
#define RT_USING_PIN
#define RT_USING_SPI
```

第三个宏
```
#define BSP_USING_UART
#define BSP_USING_UART1
#define BSP_USING_SPI
#define BSP_USING_SPI1
```

代码如下

```c
#define W25Q_SPI_DEVICE_NAME     "spi10"
#define W25Q_SPI_BUS_NAME     "spi1"
static void spientry(void*parameter)
{   
    rt_kprintf("spi thread run here!\n");
    rt_uint8_t id[5] = {0};
    rt_uint8_t w25x_read_id =0X9F;
    rt_uint8_t test[5] = {0};
    struct rt_spi_configuration cfg;
    struct rt_spi_device *spi_dev_w25q;
    rt_kprintf("spi attach run here!\n");
    if (RT_EOK != rt_hw_spi_device_attach(W25Q_SPI_BUS_NAME, W25Q_SPI_DEVICE_NAME,GET_PIN(A, 4) ))
    {
        rt_kprintf("spi fault!\n");
    }
    rt_kprintf("spi attach complete!\n");

spi_dev_w25q = (struct rt_spi_device *)rt_device_find(W25Q_SPI_DEVICE_NAME);
    if(spi_dev_w25q!=RT_NULL)
    {
    rt_kprintf("spi device has find!\n");
    }
    cfg.data_width = 8;
    cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_3 | RT_SPI_MSB ; 
    cfg.max_hz =  1000000;
    if(rt_spi_configure(spi_dev_w25q, &cfg)==RT_EOK)
    {
        rt_kprintf("spi config has done!\n");
    }
    //rt_spi_send_then_recv(spi_dev_w25q, &w25x_read_id, 1, id, 5);
    struct rt_spi_message msg1,msg2;

msg1.send_buf=&w25x_read_id;
    msg1.recv_buf=RT_NULL;
    msg1.length=1;
    msg1.cs_take=1;
    msg1.cs_release=0;
    msg1.next=&msg2;

msg2.send_buf=RT_NULL;
    msg2.recv_buf=id;
    msg2.length=5;
    msg2.cs_take=0;
    msg2.cs_release=1;
    msg2.next=RT_NULL;
	
    rt_spi_transfer_message(spi_dev_w25q,&msg1);
    rt_kprintf("spi ID is:%x%x\n",id[3],id[4]);
    
	}
```

用的是STM32F1单片机，其中
PA4     ------> SPI1_NSS
PA5     ------> SPI1_SCK
PA6     ------> SPI1_MISO
PA7     ------> SPI1_MOSI

用过list device是可以看到SPI BUS spi 和SPI Device spi10的

调试发现传入查询命令0X9F后得到的ID是错的，并且用Keil的调试看不到GPIOA6,A7引脚的电平变化，CS有变化，不知道本来就是这样还是有问题，求大神们帮帮忙，救救孩子吧