/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2025 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "spi.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <string.h>
#include <stdbool.h>
#define LFS_NOR_FLASH_TOTAL_SIZE (2UL * 1024UL * 1024UL) /* W25Q16 = 2 MiB */
#include "lfs_nor_flash_port.h"
#include "lfs_port.h"
#include "lfs_flash_port.h"
#include "debug_driver.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
static lfs_t g_lfs;
static lfs_file_t g_lfs_file;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
static void LittleFS_Test(bool use_nor_flash);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
typedef struct {
int (*format)(lfs_t *lfs);
int (*mount)(lfs_t *lfs);
int (*unmount)(lfs_t *lfs);
const char *label;
} lfs_storage_ops_t;
static void LittleFS_Test(bool use_nor_flash)
{
struct lfs_file file;
char read_buffer[64] = {0};
const char *path = use_nor_flash ? "nor_flash.txt" : "int_flash.txt";
const char *payload = use_nor_flash
? "LittleFS NOR Flash Demo\r\n"
: "LittleFS Internal Flash Demo\r\n";
const lfs_storage_ops_t ops = use_nor_flash
? (lfs_storage_ops_t){lfs_nor_flash_port_format, lfs_nor_flash_port_mount, lfs_nor_flash_port_unmount, "NOR"}
: (lfs_storage_ops_t){lfs_flash_port_format, lfs_flash_port_mount, lfs_flash_port_unmount, "INT"};
int err = ops.mount(&g_lfs);
if (err != LFS_ERR_OK) {
uart_printf("[%s] mount failed (%d), formatting...\r\n", ops.label, err);
err = ops.format(&g_lfs);
if (err == LFS_ERR_OK) {
uart_printf("[%s] format done\r\n", ops.label);
err = ops.mount(&g_lfs);
} else {
uart_printf("[%s] format failed (%d)\r\n", ops.label, err);
}
}
if (err != LFS_ERR_OK) {
uart_printf("[%s] mount failed (%d)\r\n", ops.label, err);
return;
}
err = lfs_file_open(&g_lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC);
if (err < 0) {
uart_printf("[%s] open for write failed (%d)\r\n", ops.label, err);
ops.unmount(&g_lfs);
return;
}
lfs_ssize_t written = lfs_file_write(&g_lfs, &file, payload, strlen(payload));
lfs_file_close(&g_lfs, &file);
if (written < 0) {
uart_printf("[%s] write failed (%ld)\r\n", ops.label, (long)written);
ops.unmount(&g_lfs);
return;
}
err = lfs_file_open(&g_lfs, &file, path, LFS_O_RDONLY);
if (err < 0) {
uart_printf("[%s] open for read failed (%d)\r\n", ops.label, err);
ops.unmount(&g_lfs);
return;
}
lfs_ssize_t read = lfs_file_read(&g_lfs, &file, read_buffer,
sizeof(read_buffer) - 1U);
lfs_file_close(&g_lfs, &file);
if (read < 0) {
uart_printf("[%s] read failed (%ld)\r\n", ops.label, (long)read);
ops.unmount(&g_lfs);
return;
}
read_buffer[read] = '\0';
uart_printf("[%s] LittleFS OK (%ld bytes): %s\r\n", ops.label, (long)read, read_buffer);
ops.unmount(&g_lfs);
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* 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_USART2_UART_Init();
MX_SPI2_Init();
/* USER CODE BEGIN 2 */
HAL_Delay(500);
LittleFS_Test(false); /* internal Flash */
LittleFS_Test(true); /* external NOR */
/* 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 = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4;
RCC_OscInitStruct.PLL.PLLN = 84;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses 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();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
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,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */