LittleFS文件系统虽然官方有开源源码，但移植到自己板子上时还是有这样那样的问题，现将移植好的完整工程上传，经原子战舰开发板验证通过。
manc.c源码如下：
littlefs例程—经原子战舰开发板验证.7z
(643.61 KB, 下载次数: 100)
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f1xx_hal.h"
#include "spi.h"
#include "usart.h"
#include "gpio.h"
/* USER CODE BEGIN Includes */
//#include "bsp_w25qxx.h."
#include "lfs.h"
#include "W25QXX.h"
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
uint32_t w25qxx_type=0;
lfs_t lfs;
lfs_file_t file;
static int user_provided_block_device_read(
const struct lfs_config *lfsc, lfs_block_t block, lfs_off_t off, void *buffer, lfs_size_t size)
{
W25QXX_Read((uint8_t *)buffer,(block * lfsc->block_size + off),size);
return LFS_ERR_OK;
}
static int user_provided_block_device_prog(
const struct lfs_config *lfsc, lfs_block_t block, lfs_off_t off, const void *buffer, lfs_size_t size)
{
W25QXX_Write_NoCheck((uint8_t*)buffer,(block * lfsc->block_size + off),size);
return LFS_ERR_OK;
}
static int user_provided_block_device_erase(const struct lfs_config *lfsc, lfs_block_t block)
{
W25QXX_Erase_Sector(block);
return LFS_ERR_OK;
}
static int user_provided_block_device_sync(const struct lfs_config *lfsc)
{
return LFS_ERR_OK;
}
uint8_t lfs_read_buf[256];
uint8_t lfs_prog_buf[256];
uint8_t lfs_lookahead_buf[16]; // 128/8=16
uint8_t lfs_file_buf[256];
// configuration of the filesystem is provided by this struct
const struct lfs_config cfg = {
// block device driver context data
.context = NULL,
// block device operations
.read = user_provided_block_device_read, //¶áè¡êy¾Y
.prog = user_provided_block_device_prog, //±à3ìò»¸öéèÇø
.erase = user_provided_block_device_erase,//2á3yò»¸öéèÇø
.sync = user_provided_block_device_sync,
// block device configuration
.read_size = 256,
.prog_size = 256,//FLASH_PAGE_SIZE ò3′óD¡
.block_size = 4096,//FLASH_SECTOR_SIZE éèÇø′óD¡
.block_count = 1024,//éèÇøêyá¿
.lookahead = 128,//±ØDëêÇ32μÄÕûêy±¶
.read_buffer = lfs_read_buf,
.prog_buffer = lfs_prog_buf,
.lookahead_buffer = lfs_lookahead_buf,
.file_buffer = lfs_file_buf,
};
/* USER CODE END 0 */
/**
* @brief The application entry point.
*
* @retval None
*/
int main(void)
{
/* USER CODE BEGIN 1 */
//Lifflefs_Test\Lifflefs_Test.axf: Error: L6218E: Undefined symbol __aeabi_assert (referred from lfs.o).
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
MX_SPI2_Init();
/* USER CODE BEGIN 2 */
w25qxx_type=W25QXX_ReadID();
int err = lfs_mount(&lfs, &cfg);
// reformat if we can't mount the filesystem
// this should only happen on the first boot
if (err) {
lfs_format(&lfs, &cfg);
lfs_mount(&lfs, &cfg);
}
// read current count
uint32_t boot_count = 0;
lfs_file_open(&lfs, &file, "/boot_count", LFS_O_RDWR | LFS_O_CREAT);
lfs_file_read(&lfs, &file, &boot_count, sizeof(boot_count));
// update boot count
boot_count += 1;
lfs_file_rewind(&lfs, &file);
lfs_file_write(&lfs, &file, &boot_count, sizeof(boot_count));
// remember the storage is not updated until the file is closed successfully
lfs_file_close(&lfs, &file);
// release any resources we were using
lfs_unmount(&lfs);
// print the boot count
printf("boot_count: %d\n", boot_count);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Configure the Systick interrupt time
*/
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
/**Configure the Systick
*/
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @param file: The file name as string.
* @param line: The line in file as a number.
* @retval None
*/
void _Error_Handler(char *file, int line)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
while(1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
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