RT-Thread-【12月】 rtthread studio qspi w25q256RT-Thread问答社区

【12月】 rtthread studio qspi w25q256

发布于 2020-12-03 15:55:11 浏览：1750 订阅该版

[tocm]

# 查询qspi配置过程
文件路径： /drivers/board.h

```c
/*-------------------------- QSPI CONFIG BEGIN --------------------------*/

/** if you want to use qspi you can use the following instructions.
 *
 * STEP 1, open qspi driver framework support in the RT-Thread Settings file
 *
 * STEP 2, define macro related to the qspi
 *                 such as     #define BSP_USING_QSPI
 *
 * STEP 3, copy your qspi init function from stm32xxxx_hal_msp.c generated by stm32cubemx to the end of board.c file
 *                 such as     void HAL_QSPI_MspInit(QSPI_HandleTypeDef* hqspi)
 *
 * STEP 4, modify your stm32xxxx_hal_config.h file to support qspi peripherals. define macro related to the peripherals
 *                 such as     #define HAL_QSPI_MODULE_ENABLED
 *
 */
#define BSP_USING_QSPI
```
注释中详细描述了qspi配置过程，

## 2 使能使用 qspi bsp
- 打开 /drivers/board.h
使能 **#define BSP_USING_QSPI**

## 3 初始化qspi硬件
通过 stm32cubemx工具使能qspi硬件，在一下路径

\Core\Src\stm32f7xx_hal_msp.c中将**HAL_QSPI_MspInit**拷贝到 /drivers/board.c中

```c

void HAL_QSPI_MspInit(QSPI_HandleTypeDef* qspiHandle)
{

GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(qspiHandle->Instance==QUADSPI)
  {
    /* QUADSPI clock enable */
    __HAL_RCC_QSPI_CLK_ENABLE();

__HAL_RCC_GPIOE_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    __HAL_RCC_GPIOD_CLK_ENABLE();
    /**QUADSPI GPIO Configuration
    PE2     ------> QUADSPI_BK1_IO2
    PB2     ------> QUADSPI_CLK
    PB10     ------> QUADSPI_BK1_NCS
    PD11     ------> QUADSPI_BK1_IO0
    PD12     ------> QUADSPI_BK1_IO1
    PD13     ------> QUADSPI_BK1_IO3
    */
    GPIO_InitStruct.Pin = GPIO_PIN_2;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF9_QUADSPI;
    HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF9_QUADSPI;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF9_QUADSPI;
    HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
  }
}
```
## 4 打开相应的HAL库
- 打开 /drivers/ stm32f7xx_hal_conf.h
使能  **#define HAL_QSPI_MODULE_ENABLED**
使能  **#define HAL_SPI_MODULE_ENABLED**

## 5 编译验证
烧录，在串口终端输入**/demo>list_device** 
```c
qspi1    SPI Bus              0
uart1    Character Device     2
pin      Miscellaneous Device 0
```
可以看到spi总线

# 挂载W25qspi设备
 - 添加 qspiflash挂载代码
```c
/**
  *  读取qspi状态寄存器2
 * @param device : qspi设备
 * @return
 */
char w25qxx_read_status_register2(struct rt_qspi_device *device)
{
    /* 0x35 read status register2 */
    char instruction = 0x35, status;
    rt_qspi_send_then_recv(device, &instruction, 1, &status, 1);//读取状态寄存器
    return status;
}
/**
 * qspi写使能
 * @param device : qspi设备
 */
void w25qxx_write_enable(struct rt_qspi_device *device)
{
    /* 0x06 write enable */
    char instruction = 0x06;
    rt_qspi_send(device, &instruction, 1);//发送数据
}
/**
  *   使能qspi模式
 * @param device : qspi设备
 */
void w25qxx_enter_qspi_mode(struct rt_qspi_device *device)
{
    char status = 0;
    /* 0x38 enter qspi mode */
    char instruction = 0x38;
    char write_status2_buf[2] = {0};

/* 0x31 write status register2 */
    write_status2_buf[0] = 0x31;

status = w25qxx_read_status_register2(device);//读取状态寄存器2
    if (!(status & 0x02))//判读当前flash通信模式
    {
        status |= 1 << 1;
        w25qxx_write_enable(device);              //w25q写使能
        write_status2_buf[1] = status;              //写状态寄存器
        rt_qspi_send(device, &write_status2_buf, 2);//
        rt_qspi_send(device, &instruction, 1);//设置qspi模式
        rt_kprintf("flash already enter qspi mode\n");
        rt_thread_mdelay(10);
    }
}

/**
 *挂在设备到qspi总线上
 * @return 挂载状态
 */
static rt_err_t rt_hw_qspi_flash_with_sfud_init(void)
{
    /*W25Q256挂在qspi总线上*/
    rt_err_t ret = stm32_qspi_bus_attach_device("qspi1", "qspi10", RT_NULL, 4, w25qxx_enter_qspi_mode, RT_NULL);
    if (ret != RT_EOK)
    {
        rt_kprintf("qspi attach device failed\n");
        return -RT_ERROR;
    }
    rt_kprintf("qspi attach device success\n");
    return RT_EOK;
}

/*设备自动初始化 */
INIT_DEVICE_EXPORT(rt_hw_qspi_flash_with_sfud_init);
```
-  编译验证
烧录，在串口终端输入
**list_device**

```c

device           type         ref count
-------- -------------------- ----------
qspi10   SPI Device           0
qspi1    SPI Bus              0
uart1    Character Device     2
pin      Miscellaneous Device 0
```
可以看到spi总线 和 QSPI设备

- 设备id读取测试

```c
#define W25Q_SPI_DEVICE_NAME     "qspi10"
static void qspi_w25q_sample(int argc, char *argv[])
{
    struct rt_spi_device *qspi_dev_w25q;
    char name[RT_NAME_MAX];
    rt_uint8_t w25x_read_id = 0x90;
    rt_uint8_t id[5] = {0};

if (argc == 2)
    {
        rt_strncpy(name, argv[1], RT_NAME_MAX);
    }
    else
    {
        rt_strncpy(name, W25Q_SPI_DEVICE_NAME, RT_NAME_MAX);
    }

/* 查找 spi 设备获取设备句柄 */
    qspi_dev_w25q = (struct rt_spi_device *)rt_device_find(name);//根据 SPI 设备名称查找设备获取设备句柄
    if (!qspi_dev_w25q)
    {
        rt_kprintf("qspi sample run failed! can't find %s device!\n", name);
    }
    else
    {
        /* 方式1：使用 rt_spi_send_then_recv()发送命令读取ID */
        rt_qspi_send_then_recv(qspi_dev_w25q, &w25x_read_id, 1, id, 5);//先发送后接收数据id
        rt_kprintf("use rt_qspi_send_then_recv() read w25q ID is:%x%x\n", id[3], id[4]);
    }
}
/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(qspi_w25q_sample, qspi w25q sample);

```

# 创建 快设备
- 使能 SFUD
 打开 **RT-Thread Settings**
选择SPI功能后，右键详细配置：分别勾选

```c
|
|---->设备驱动程序
|		|---->使能SPI总线/设备驱动程序		√
|				|---->使能QSPI模式			√
|				|---->使能串行Flash通用驱动程序(SFUD)				√
|					|---->使能QSPI模式								√
|					|---->使能自动探针探测Flsh JEDEC SFDP 			√
|					|---->使能Flash 芯片信息表						√
```
- 添加创建快设备代码
```c
/**
 * 创建块设备
 * @return
 */
static int rt_hw_qspi_block_device_init(void)
{
    /*   W25Q256 注册为快设备*/
    if (RT_NULL == rt_sfud_flash_probe("W25Q256", "qspi10"))
    {
        rt_kprintf("flash sfud failed\n");
        return -RT_ERROR;
    }
    rt_kprintf("flash sfud success\n");
    return RT_EOK;
}

/*设备自动初始化 */
INIT_DEVICE_EXPORT(rt_hw_qspi_block_device_init);
```

-  编译验证
烧录，在串口终端输入
**list_device** 
```c

device           type         ref count
-------- -------------------- ----------
W25Q256  Block Device         0
qspi10   SPI Device           0
qspi1    SPI Bus              0
uart1    Character Device     2
pin      Miscellaneous Device 0

```
可以看到spi总线 和 QSPI设备 快设备

# 挂载文件系统

```c
static int mnt_init(void)
{
    dfs_mkfs("elm", "W25Q256");//格式化设备
    if(dfs_mount("W25Q256", "/", "elm", 0, 0)==0)//挂载文件
    {
        rt_kprintf("dfs mount success\r\n");
        return RT_EOK;
    }else {
        rt_kprintf("dfs mount failed\r\n");
        return -RT_ERROR;
    }
}
/* 组件自动初始化 */
INIT_COMPONENT_EXPORT(mnt_init);
```

-  编译验证
烧录，在串口终端输入
**ls** 
```c
Directory /:
```