102 lines
2.5 KiB
Markdown
102 lines
2.5 KiB
Markdown
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## 底层配置
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1. 点击工程setting或menuconfig
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2. 图形界面中开启**DFS Fatfs SPI SFUD**，env中对应
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3. 更新最小扇区
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W25Q128是16MB spi flash，一共有256个block ，每个Block 64KB。
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每个Block可以分割为16个扇区（small sector），每个扇区4096字节（4KB），所以我们需要修改fatfs的扇区大小为4096
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4. 按board.h中说明开启宏定义
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5. 添加SPI初始化函数到board.c（可从cubwMX考取）
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```c
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/**
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* @brief SPI MSP Initialization
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* This function configures the hardware resources used in this example
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* @param hspi: SPI handle pointer
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* @retval None
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*/
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void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
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{
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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if(hspi->Instance==SPI1)
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{
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/* USER CODE BEGIN SPI1_MspInit 0 */
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/* USER CODE END SPI1_MspInit 0 */
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/* Peripheral clock enable */
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__HAL_RCC_SPI1_CLK_ENABLE();
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__HAL_RCC_GPIOA_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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/**SPI1 GPIO Configuration
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PB3 ------> SPI1_SCK
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PB4 ------> SPI1_MISO
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PB5 ------> SPI1_MOSI
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
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GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
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HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
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/* USER CODE BEGIN SPI1_MspInit 1 */
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/* USER CODE END SPI1_MspInit 1 */
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}
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}
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```
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5. 其它默认即可
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## 程序设置
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1. 初始化。在spi1总线上注册spi10设备的函数，并将W25Q128抽象为块设备供rtt使用，后续挂载文件系统
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```c
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int rt_hw_spi_flash_init(void)
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{
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rt_hw_spi_device_attach("spi1", "spi10", GPIOG, GPIO_PIN_8);//片选信号
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if (RT_NULL == rt_sfud_flash_probe("W25Q128", "spi10"))
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{
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rt_kprintf("sfud error.\n");
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return -RT_ERROR;
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};
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else
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{
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rt_kprintf("sfud success.\n");
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return RT_EOK;
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}
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}
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/* 导出到自动初始化 */
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INIT_COMPONENT_EXPORT(rt_hw_spi_flash_init);
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```
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2. 挂载
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```c
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void w25q128_mount(void)
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{
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//dfs_mkfs("elm", "W25Q128");//格式化
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rt_device_t dev;
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dev = rt_device_find("W25Q128");
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if(dev != RT_NULL) {
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if(dfs_mount("W25Q128", "/", "elm", 0, 0) == 0){
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rt_kprintf("spi_flash mount to spi!\n");
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} else {
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rt_kprintf("spi_flash mount to spi failed!\n");
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}
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}
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}
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/* 导出到自动初始化 */
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INIT_COMPONENT_EXPORT(w25q128_mount);
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```
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3. 格式化
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在msh界面手动格式化一次
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`mkfs W25Q128`
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## msh常用命令
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### echo
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新建文件
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### cat
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回读文件
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