STM32存储左右互搏 SPI总线FATS读写FRAM MB85RS2M

STM32存储左右互搏 SPI总线FATS读写FRAM MB85RS2M

在中低容量存储领域，除了FLASH的使用，，还有铁电存储器FRAM的使用，相对于FLASH，FRAM写操作时不需要预擦除，所以执行写操作时可以达到更高的速度，其主要优点为没有FLASH持续写操作跨页地址需要变换的要求。相比于SRAM则具有非易失性, 因此价格方面会高一些。MB85RS2M是256K Byte（2M bit）的FRAM，能够按字节进行写入且没有写入等待时间。其管脚功能兼容FLASH：在这里插入图片描述
这里介绍STM32 FATS文件操作方式访问FRAM MB85RS2M的例程。采用STM32CUBEIDE开发平台，以STM32F401CCU6芯片为例，通过STM32 SPI硬件电路实现读写操作，通过USB虚拟串口进行控制。

STM32工程配置

首先建立基本工程并设置时钟：
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配置硬件SPI接口:
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增加配置PA4作为SPI软件代码控制输出的片选管脚
并增加PA2和PA3连接到/WP和/HOLD管脚，并保持输出高电平:
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配置USB作为通讯口：
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对FATS文件系统进行配置:
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保存并生成初始工程代码：
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STM32工程代码

USB虚拟串口的使用参考：STM32 USB VCOM和HID的区别，配置及Echo功能实现（HAL）
代码里用到的微秒延时函数参考： STM32 HAL us delay（微秒延时）的指令延时实现方式及优化

建立MB85RS2M.h头文件：

#ifndef INC_MB85RS2M_H_
#define INC_MB85RS2M_H_
#include "main.h"/*To define operation code*/
#define WREN 0x06    //Set Write Enable Latch
#define WRDI 0x04    //Reset Write Enable Latch
#define RDSR 0x05    //Read Status Register
#define WRSR 0x01    //Write Status Register
#define READ 0x03    //Read Memory Code
#define WRITE 0x02   //Write Memory Code
#define RDID 0x9F    //Read Device ID#define MB85RS2M_ID 0x03487F04uint32_t MB85RS2M_ReadID(void);
uint8_t MB85RS2M_Init(void);
void MB85RS2M_Set_Write_Enable_Latch(void);
void MB85RS2M_Reset_Write_Enable_Latch(void);
void MB85RS2M_Write_Status_Register(uint8_t SRV);
uint8_t MB85RS2M_Read_Status_Register(void);
void MB85RS2M_Write_Memory(uint8_t * wd, uint32_t addr, uint32_t len);
void MB85RS2M_Read_Memory(uint8_t * rd, uint32_t addr, uint32_t len);#endif /* INC_MB85RS2M_H_ */

建立MB85RS2M.c源文件：

//Written by Pegasus Yu in 2023#include "MB85RS2M.h"
#include <string.h>#define SPI1_CS_L HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET)
#define SPI1_CS_H HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET)
extern SPI_HandleTypeDef hspi1;
extern void PY_Delay_us_t(uint32_t Delay);uint32_t MB85RS2M_ReadID(void)
{uint8_t ftd[5];uint8_t frd[5];uint8_t Manufacturer_ID;uint8_t Continuation_Code;uint8_t Product_ID_L;uint8_t Product_ID_H;ftd[0]=RDID;SPI1_CS_L;HAL_SPI_TransmitReceive(&hspi1, ftd, frd, 5, 0xFFFFFFFF);SPI1_CS_H;Manufacturer_ID = frd[1];Continuation_Code = frd[2];Product_ID_L = frd[3];Product_ID_H = frd[4];return ((Product_ID_H<<24)|(Product_ID_L<<16)|(Continuation_Code<<8)|(Manufacturer_ID));
}uint8_t MB85RS2M_Init(void)
{uint8_t st = 0;for(uint8_t i=0; i<4; i++){if(MB85RS2M_ReadID()==MB85RS2M_ID){st = 1;break;}}return st;}/** WEL is reset after the following operations which means every write operation must follow once WREN operation MB85RS2M_Set_Write_Enable_Latch().* After power ON.* After WRDI command recognition.* At the rising edge of CS after WRSR command recognition.* At the rising edge of CS after WRITE command recognition.*/
void MB85RS2M_Set_Write_Enable_Latch(void)
{uint8_t cmd = WREN;SPI1_CS_L;HAL_SPI_Transmit(&hspi1, &cmd, 1, 0xFFFFFFFF);SPI1_CS_H;
}void MB85RS2M_Reset_Write_Enable_Latch(void)
{uint8_t cmd = WRDI;SPI1_CS_L;HAL_SPI_Transmit(&hspi1, &cmd, 1, 0xFFFFFFFF);SPI1_CS_H;
}void MB85RS2M_Write_Status_Register(uint8_t SRV)
{uint8_t data[2];data[0] = WRSR;data[1] = SRV;MB85RS2M_Set_Write_Enable_Latch();PY_Delay_us_t(2);SPI1_CS_L;HAL_SPI_Transmit(&hspi1, data, 2, 0xFFFFFFFF);SPI1_CS_H;
}uint8_t MB85RS2M_Read_Status_Register(void)
{uint8_t cmd[2];uint8_t data[2];uint8_t SRV;cmd[0] = RDSR;SPI1_CS_L;HAL_SPI_TransmitReceive(&hspi1, cmd, data, 2, 0xFFFFFFFF);SPI1_CS_H;SRV = data[1];return SRV;}/** wd: data buffer pointer* addr: address to operate for MB85RS2M* len: data length to be written*/void MB85RS2M_Write_Memory(uint8_t * wd, uint32_t addr, uint32_t len)
{uint8_t data[len+4];data[0] = WRITE;data[1] = (uint8_t)(addr>>16);data[2] = (uint8_t)(addr>>8);data[3] = (uint8_t)addr;memcpy(data+4, wd, len);MB85RS2M_Set_Write_Enable_Latch();PY_Delay_us_t(2);SPI1_CS_L;HAL_SPI_Transmit(&hspi1, data, len+4, 0xFFFFFFFF);SPI1_CS_H;
}/** rd: data buffer pointer* addr: address to operate for MB85RS2M* len: data length to be written*/void MB85RS2M_Read_Memory(uint8_t * rd, uint32_t addr, uint32_t len)
{uint8_t cmd[len+4];uint8_t data[len+4];cmd[0] = READ;cmd[1] = (uint8_t)(addr>>16);cmd[2] = (uint8_t)(addr>>8);cmd[3] = (uint8_t)addr;SPI1_CS_L;HAL_SPI_TransmitReceive(&hspi1, cmd, data , len+4, 0xFFFFFFFF);SPI1_CS_H;memcpy(rd, data+4, len);
}

USB接收命令的代码：
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static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)
{/* USER CODE BEGIN 6 */extern uint8_t cmd;cmd = Buf[0];USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);USBD_CDC_ReceivePacket(&hUsbDeviceFS);return (USBD_OK);/* USER CODE END 6 */
}

对ffconf.h添加包含信息：
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#include "main.h"
#include "stm32f4xx_hal.h"
#include "MB85RS2M.h"

修改user_diskio.c，对文件操作函数与底层I2C读写提供连接：

/* USER CODE BEGIN Header */
/********************************************************************************* @file    user_diskio.c* @brief   This file includes a diskio driver skeleton to be completed by the user.******************************************************************************* @attention** Copyright (c) 2023 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 */#ifdef USE_OBSOLETE_USER_CODE_SECTION_0
/** Warning: the user section 0 is no more in use (starting from CubeMx version 4.16.0)* To be suppressed in the future.* Kept to ensure backward compatibility with previous CubeMx versions when* migrating projects.* User code previously added there should be copied in the new user sections before* the section contents can be deleted.*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
#endif/* USER CODE BEGIN DECL *//* Includes ------------------------------------------------------------------*/
#include <string.h>
#include "ff_gen_drv.h"/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*//* Private variables ---------------------------------------------------------*/
/* Disk status */
static volatile DSTATUS Stat = STA_NOINIT;/* USER CODE END DECL *//* Private function prototypes -----------------------------------------------*/
DSTATUS USER_initialize (BYTE pdrv);
DSTATUS USER_status (BYTE pdrv);
DRESULT USER_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count);
#if _USE_WRITE == 1DRESULT USER_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count);
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1DRESULT USER_ioctl (BYTE pdrv, BYTE cmd, void *buff);
#endif /* _USE_IOCTL == 1 */Diskio_drvTypeDef  USER_Driver =
{USER_initialize,USER_status,USER_read,
#if  _USE_WRITEUSER_write,
#endif  /* _USE_WRITE == 1 */
#if  _USE_IOCTL == 1USER_ioctl,
#endif /* _USE_IOCTL == 1 */
};/* Private functions ---------------------------------------------------------*//*** @brief  Initializes a Drive* @param  pdrv: Physical drive number (0..)* @retval DSTATUS: Operation status*/
DSTATUS USER_initialize (BYTE pdrv           /* Physical drive nmuber to identify the drive */
)
{/* USER CODE BEGIN INIT *//**************************SELF DEFINITION PART************/uint8_t res;res = MB85RS2M_Init();if(res) return RES_OK;else return  STA_NOINIT;/**********************************************************/
/*Stat = STA_NOINIT;return Stat;*//* USER CODE END INIT */
}/*** @brief  Gets Disk Status* @param  pdrv: Physical drive number (0..)* @retval DSTATUS: Operation status*/
DSTATUS USER_status (BYTE pdrv       /* Physical drive number to identify the drive */
)
{/* USER CODE BEGIN STATUS *//**************************SELF DEFINITION PART************/switch (pdrv){case 0 :return RES_OK;case 1 :return RES_OK;case 2 :return RES_OK;default:return STA_NOINIT;}/**********************************************************//*Stat = STA_NOINIT;return Stat;*//* USER CODE END STATUS */
}/*** @brief  Reads Sector(s)* @param  pdrv: Physical drive number (0..)* @param  *buff: Data buffer to store read data* @param  sector: Sector address (LBA)* @param  count: Number of sectors to read (1..128)* @retval DRESULT: Operation result*/
DRESULT USER_read (BYTE pdrv,      /* Physical drive nmuber to identify the drive */BYTE *buff,     /* Data buffer to store read data */DWORD sector,   /* Sector address in LBA */UINT count      /* Number of sectors to read */
)
{/* USER CODE BEGIN READ *//**************************SELF DEFINITION PART************/uint16_t len;if( !count ){return RES_PARERR;  /* count不能等于0，否则返回参数错误*/}switch (pdrv){case 0:sector <<= 9; //Convert sector number to byte addresslen = count*512;MB85RS2M_Read_Memory((uint8_t *)buff, sector, len);return RES_OK;default:return RES_ERROR;}/**********************************************************//*return RES_OK;*//* USER CODE END READ */
}/*** @brief  Writes Sector(s)* @param  pdrv: Physical drive number (0..)* @param  *buff: Data to be written* @param  sector: Sector address (LBA)* @param  count: Number of sectors to write (1..128)* @retval DRESULT: Operation result*/
#if _USE_WRITE == 1
DRESULT USER_write (BYTE pdrv,          /* Physical drive nmuber to identify the drive */const BYTE *buff,   /* Data to be written */DWORD sector,       /* Sector address in LBA */UINT count          /* Number of sectors to write */
)
{/* USER CODE BEGIN WRITE *//* USER CODE HERE *//**************************SELF DEFINITION PART************/uint16_t len;if( !count ){return RES_PARERR;  /* count不能等于0，否则返回参数错误*/}switch (pdrv){case 0:sector <<= 9; //Convert sector number to byte addresslen = count*512;MB85RS2M_Write_Memory((uint8_t *)buff, sector, len);return RES_OK;default:return RES_ERROR;}/**********************************************************//*return RES_OK;*//* USER CODE END WRITE */
}
#endif /* _USE_WRITE == 1 *//*** @brief  I/O control operation* @param  pdrv: Physical drive number (0..)* @param  cmd: Control code* @param  *buff: Buffer to send/receive control data* @retval DRESULT: Operation result*/
#if _USE_IOCTL == 1
DRESULT USER_ioctl (BYTE pdrv,      /* Physical drive nmuber (0..) */BYTE cmd,       /* Control code */void *buff      /* Buffer to send/receive control data */
)
{/* USER CODE BEGIN IOCTL *//**************************SELF DEFINITION PART************/#define user_sector_byte_size 512DRESULT res;switch(cmd){case CTRL_SYNC:res=RES_OK;break;case GET_SECTOR_SIZE:*(WORD*)buff = user_sector_byte_size;res = RES_OK;break;case GET_BLOCK_SIZE:*(WORD*)buff = 4096/user_sector_byte_size;res = RES_OK;break;case GET_SECTOR_COUNT:*(DWORD*)buff = (256*1024/512);res = RES_OK;break;default:res = RES_PARERR;break;}return res;/**********************************************************//*DRESULT res = RES_ERROR;return res;*//* USER CODE END IOCTL */
}
#endif /* _USE_IOCTL == 1 */

然后在main.c里根据串口输入命令（16进制单字节）实现如下功能：
0x01. 读取FRAM ID
0x02. 装载FATS文件系统
0x03: 创建/打开文件并从头位置写入数据
0x04: 打开文件并从头位置读入数据
0x05: 创建/打开文件并从特定位置写入数据
0x06: 打开文件并从特定位置读入数据
完整的代码实现如下：

/* USER CODE BEGIN Header */
/********************************************************************************* @file           : main.c* @brief          : Main program body******************************************************************************* @attention** Copyright (c) 2023 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.********************************************************************************/
//Written by Pegasus Yu in 2023
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "fatfs.h"
#include "usb_device.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <string.h>
#include "MB85RS2M.h"
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len);
/* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
__IO float usDelayBase;
void PY_usDelayTest(void)
{__IO uint32_t firstms, secondms;__IO uint32_t counter = 0;firstms = HAL_GetTick()+1;secondms = firstms+1;while(uwTick!=firstms) ;while(uwTick!=secondms) counter++;usDelayBase = ((float)counter)/1000;
}void PY_Delay_us_t(uint32_t Delay)
{__IO uint32_t delayReg;__IO uint32_t usNum = (uint32_t)(Delay*usDelayBase);delayReg = 0;while(delayReg!=usNum) delayReg++;
}void PY_usDelayOptimize(void)
{__IO uint32_t firstms, secondms;__IO float coe = 1.0;firstms = HAL_GetTick();PY_Delay_us_t(1000000) ;secondms = HAL_GetTick();coe = ((float)1000)/(secondms-firstms);usDelayBase = coe*usDelayBase;
}void PY_Delay_us(uint32_t Delay)
{__IO uint32_t delayReg;__IO uint32_t msNum = Delay/1000;__IO uint32_t usNum = (uint32_t)((Delay%1000)*usDelayBase);if(msNum>0) HAL_Delay(msNum);delayReg = 0;while(delayReg!=usNum) delayReg++;
}
/* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;/* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint8_t cmd=0;          //for status controluint8_t FRAM_mount_status = 0; //FRAM fats mount status indication (0: unmount; 1: mount)
uint8_t FATS_Buff[_MAX_SS]; //Buffer for f_mkfs() operationFRESULT retFRAM;
FIL file;
FATFS *fs;UINT bytesread;
UINT byteswritten;
uint8_t rBuffer[20];      //Buffer for read
uint8_t WBuffer[20] ={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}; //Buffer for write#define user_sector_byte_size 512
uint8_t FRAMbuffer[user_sector_byte_size];extern char USERPath[4];
char * console;
/* USER CODE END 0 *//*** @brief  The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 */FRAM_mount_status = 0;uint32_t FRAM_Read_Size;extern char USERPath[4];char * dpath = "0:"; //Disk Pathfor(uint8_t i=0; i<4; i++){USERPath[i] = *(dpath+i);}const TCHAR* filepath = "0:test.txt";char cchar[256];console = cchar;/* 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_USB_DEVICE_Init();MX_SPI1_Init();MX_FATFS_Init();/* USER CODE BEGIN 2 */PY_usDelayTest();PY_usDelayOptimize();/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){if(cmd==1) //Read ID{cmd = 0;sprintf(console, "FRAM ID=MB85RS2MT\r\n\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else if(cmd==2) //FRAM File System Mount{cmd = 0;retFRAM=f_mount(&USERFatFS, (TCHAR const*)USERPath, 1);if (retFRAM != FR_OK){sprintf(console, "File system mount failure: %d\r\n", retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);if(retFRAM==FR_NO_FILESYSTEM){sprintf(console, "No file system. Now to format......\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);retFRAM = f_mkfs((TCHAR const*)USERPath, FM_FAT, 1024, FATS_Buff, sizeof(FATS_Buff)); //FRAM formattingif(retFRAM == FR_OK){sprintf(console, "FRAM formatting success!\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{sprintf(console, "FRAM formatting failure!\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}}}else{FRAM_mount_status = 1;sprintf(console, "File system mount success\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}}else if(cmd==3) //File creation and write{cmd = 0;if(FRAM_mount_status==0){sprintf(console, "\r\nFRAM File system not mounted: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{retFRAM = f_open( &file, filepath, FA_CREATE_ALWAYS | FA_WRITE );  //Open or create fileif(retFRAM == FR_OK){sprintf(console, "\r\nFile open or creation successful\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);retFRAM = f_write( &file, (const void *)WBuffer, sizeof(WBuffer), &byteswritten); //Write dataif(retFRAM == FR_OK){sprintf(console, "\r\nFile write successful\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{sprintf(console, "\r\nFile write error: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}f_close(&file);   //Close file}else{sprintf(console, "\r\nFile open or creation error %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}}}else if(cmd==4) //File read{cmd = 0;if(FRAM_mount_status==0){sprintf(console, "\r\nFRAM File system not mounted: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{retFRAM = f_open( &file, filepath, FA_OPEN_EXISTING | FA_READ); //Open fileif(retFRAM == FR_OK){sprintf(console, "\r\nFile open successful\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);retFRAM = f_read( &file, (void *)rBuffer, sizeof(rBuffer), &bytesread); //Read dataif(retFRAM == FR_OK){sprintf(console, "\r\nFile read successful\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);PY_Delay_us_t(200000);FRAM_Read_Size = sizeof(rBuffer);for(uint16_t i = 0;i < FRAM_Read_Size;i++){sprintf(console, "%d ", rBuffer[i]);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}sprintf(console, "\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{sprintf(console, "\r\nFile read error: %d\r\n", retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}f_close(&file); //Close file}else{sprintf(console, "\r\nFile open error: %d\r\n", retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}}}else if(cmd==5) //File locating write{cmd = 0;if(FRAM_mount_status==0){sprintf(console, "\r\nFRAM File system not mounted: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{retFRAM = f_open( &file, filepath, FA_CREATE_ALWAYS | FA_WRITE);  //Open or create fileif(retFRAM == FR_OK){sprintf(console, "\r\nFile open or creation successful\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);retFRAM=f_lseek( &file, f_tell(&file) + sizeof(WBuffer) ); //move file operation pointer, f_tell(&file) gets file head locatingif(retFRAM == FR_OK){retFRAM = f_write( &file, (const void *)WBuffer, sizeof(WBuffer), &byteswritten);if(retFRAM == FR_OK){sprintf(console, "\r\nFile locating write successful\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{sprintf(console, "\r\nFile locating write error: %d\r\n", retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}}else{sprintf(console, "\r\nFile pointer error: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}f_close(&file);   //Close file}else{sprintf(console, "\r\nFile open or creation error %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}}}else if(cmd==6) //File locating read{cmd = 0;if(FRAM_mount_status==0){sprintf(console, "\r\nFRAM File system not mounted: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{retFRAM = f_open(&file, filepath, FA_OPEN_EXISTING | FA_READ); //Open fileif(retFRAM == FR_OK){sprintf(console, "\r\nFile open successful\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);retFRAM =  f_lseek(&file,f_tell(&file)+ sizeof(WBuffer)/2); //move file operation pointer, f_tell(&file) gets file head locatingif(retFRAM == FR_OK){retFRAM = f_read( &file, (void *)rBuffer, sizeof(rBuffer), &bytesread);if(retFRAM == FR_OK){sprintf(console, "\r\nFile locating read successful\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);PY_Delay_us_t(200000);FRAM_Read_Size = sizeof(rBuffer);for(uint16_t i = 0;i < FRAM_Read_Size;i++){sprintf(console, "%d ",rBuffer[i]);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}sprintf(console, "\r\n");while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}else{sprintf(console, "\r\nFile locating read error: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}}else{sprintf(console, "\r\nFile pointer error: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}f_close(&file);}else{sprintf(console, "\r\nFile open error: %d\r\n",retFRAM);while( CDC_Transmit_FS((uint8_t*)console, strlen(console)) == USBD_BUSY ) PY_Delay_us_t(1);}}}PY_Delay_us_t(100);/* 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 = 25;RCC_OscInitStruct.PLL.PLLN = 336;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;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();}
}/*** @brief SPI1 Initialization Function* @param None* @retval None*/
static void MX_SPI1_Init(void)
{/* USER CODE BEGIN SPI1_Init 0 *//* USER CODE END SPI1_Init 0 *//* USER CODE BEGIN SPI1_Init 1 *//* USER CODE END SPI1_Init 1 *//* SPI1 parameter configuration*/hspi1.Instance = SPI1;hspi1.Init.Mode = SPI_MODE_MASTER;hspi1.Init.Direction = SPI_DIRECTION_2LINES;hspi1.Init.DataSize = SPI_DATASIZE_8BIT;hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;hspi1.Init.NSS = SPI_NSS_SOFT;hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;hspi1.Init.TIMode = SPI_TIMODE_DISABLE;hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;hspi1.Init.CRCPolynomial = 10;if (HAL_SPI_Init(&hspi1) != HAL_OK){Error_Handler();}/* USER CODE BEGIN SPI1_Init 2 *//* USER CODE END SPI1_Init 2 */}/*** @brief GPIO Initialization Function* @param None* @retval None*/
static void MX_GPIO_Init(void)
{GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 *//* GPIO Ports Clock Enable */__HAL_RCC_GPIOH_CLK_ENABLE();__HAL_RCC_GPIOA_CLK_ENABLE();/*Configure GPIO pin Output Level */HAL_GPIO_WritePin(GPIOA, GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4, GPIO_PIN_SET);/*Configure GPIO pins : PA2 PA3 PA4 */GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}/* 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 */

STM32例程测试

串口指令0x01测试效果如下：
在这里插入图片描述
串口指令0x02测试效果如下：
在这里插入图片描述
串口指令0x03测试效果如下：
在这里插入图片描述
串口指令0x04测试效果如下：
在这里插入图片描述
串口指令0x05测试效果如下：
在这里插入图片描述
串口指令0x06测试效果如下：
在这里插入图片描述

STM32例程下载

STM32F401CCU6 SPI总线FATS读写FRAM MB85RS2M例程下载

–End–

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