STM32存储左右互搏 I2C总线FATS读写FRAM MB85RC1M
在较低容量存储领域，除了EEPROM的使用，还有铁电存储器FRAM的使用，相对于EEPROM, 同样是非易失性存储单元，FRAM支持更高的访问速度， 其主要优点为没有EEPROM持续写操作跨页地址需要变换的要求，没有写之后的延时等待要求。MB85RC1M是128K Byte（1M bit）的FRAM，能够按字节进行写入且没有写入等待时间。其管脚功能兼容相应容量的EEPOM：
这里介绍STM32 通过文件系统FATS访问FRAM MB85RC1M的例程。采用STM32CUBEIDE开发平台，以STM32F401CCU6芯片为例，通过STM32 I2C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：
配置硬件I2C接口，STM32F401CCU6的I2C快速模式只支持400KHz速率：
然后配置USB虚拟串口：
对FATS文件系统进行配置:
保存并生成初始工程代码：
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
MB85RC1M的设备默认访问地址为0xA0， MB85RC1M的存储单元地址访问略为特殊，17位地址分为两部分，最高位的1位放置于I2C设备默认访问地址的第1位，I2C设备默认访问地址第0位仍然为读写控制位，由于采用硬件I2C控制，库函数自行通过识别调用的是发送还是接收函数对第0位进行发送前设置，因此，不管是调用库函数的I2C写操作还是读操作，提供的地址相同。17位地址的低16位通过在发送设备地址后的作为跟随的第一，二个字节发送。
建立MB85RC1M.h库头文件
#ifndef INC_MB85RC1M_H_
#define INC_MB85RC1M_H_
#include "main.h"
void MB85RC1M_Write(uint32_t addr, uint8_t * data, uint32_t len);
void MB85RC1M_Read(uint32_t addr, uint8_t * data, uint32_t len);
#endif
建立MB85RC1M.c库源文件：
#include "MB85RC1M.h"
#include <string.h>
extern I2C_HandleTypeDef hi2c1;
extern uint8_t MB85RC1M_Default_I2C_Addr ;
void MB85RC1M_Write(uint32_t addr, uint8_t * data, uint32_t len)
{
uint8_t MB85RC1M_I2C_Addr;
MB85RC1M_I2C_Addr = MB85RC1M_Default_I2C_Addr | ((addr>>16)<<1); //highest 1-bit access address placed into I2C address
uint8_t TD[len+2];
TD[0] = (addr & 0xFF00)>>8; //high 8-bit access address placed into I2C first data
TD[1] =addr & 0x00FF; //low 8-bit access address placed into I2C first data
memcpy(TD+2, data, len);
HAL_I2C_Master_Transmit(&hi2c1, MB85RC1M_I2C_Addr, TD, len+2, 2700); //Write data
}
void MB85RC1M_Read(uint32_t addr, uint8_t * data, uint32_t len)
{
uint8_t MB85RC1M_I2C_Addr;
MB85RC1M_I2C_Addr = MB85RC1M_Default_I2C_Addr | ((addr>>16)<<1); //highest 1-bit access address placed into I2C address
uint8_t RA[2];
RA[0] = (addr & 0xFF00)>>8; //high 8-bit access address placed into I2C first data
RA[1] =addr & 0x00FF; //low 8-bit access address placed into I2C first data
HAL_I2C_Master_Transmit(&hi2c1, MB85RC1M_I2C_Addr, &RA[0], 2, 2700); //Write address for read
HAL_I2C_Master_Receive(&hi2c1, MB85RC1M_I2C_Addr, data, len, 2700); //Read data
}
USB接收命令的代码：
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：
#include "main.h"
#include "stm32f4xx_hal.h"
#include "MB85RC1M.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 == 1
DRESULT USER_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count);
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
DRESULT USER_ioctl (BYTE pdrv, BYTE cmd, void *buff);
#endif /* _USE_IOCTL == 1 */
Diskio_drvTypeDef USER_Driver =
{
USER_initialize,
USER_status,
USER_read,
#if _USE_WRITE
USER_write,
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
USER_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************/
extern uint8_t MB85RC1M_Default_I2C_Addr ;
MB85RC1M_Default_I2C_Addr = 0xA0; //Pin A2=A1=0
return RES_OK;
/**********************************************************/
/*
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�?*/
}
switch (pdrv)
{
case 0:
sector <<= 9; //Convert sector number to byte address
len = count*512;
MB85RC1M_Read(sector, buff, 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�?*/
}
switch (pdrv)
{
case 0:
sector <<= 9; //Convert sector number to byte address
len = count*512;
MB85RC1M_Write(sector, (uint8_t *)buff,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 512
DRESULT 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 = (128*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 "MB85RC1M.h"
#include <string.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 ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c1;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint8_t cmd=0; //for status control
uint8_t MB85RC1M_Default_I2C_Addr = 0xA0; //Pin A2=A1=0
uint32_t MB85RC1M_Access_Addr = 0; //FRAM MB85RC1M access address (17-bit)
uint8_t FRAM_mount_status = 0; //FRAM fats mount status indication (0: unmount; 1: mount)
uint8_t FATS_Buff[_MAX_SS]; //Buffer for f_mkfs() operation
FRESULT 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 Path
for(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_I2C1_Init();
MX_USB_DEVICE_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=MB85RC1MT\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 formatting
if(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 file
if(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 data
if(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 file
if(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 data
if(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 file
if(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 locating
if(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 file
if(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 locating
if(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 I2C1 Initialization Function
* @param None
* @retval None
*/
static void MX_I2C1_Init(void)
{
/* USER CODE BEGIN I2C1_Init 0 */
/* USER CODE END I2C1_Init 0 */
/* USER CODE BEGIN I2C1_Init 1 */
/* USER CODE END I2C1_Init 1 */
hi2c1.Instance = I2C1;
hi2c1.Init.ClockSpeed = 400000;
hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C1_Init 2 */
/* USER CODE END I2C1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* 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();
__HAL_RCC_GPIOB_CLK_ENABLE();
/* 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：
串口指令0x02测试效果如下：
串口指令0x03测试效果如下：
串口指令0x04测试效果如下：
串口指令0x05测试效果如下：
串口指令0x06测试效果如下：
STM32例程下载
STM32F401CCU6 I2C总线FATS读写FRAM MB85RC1M例程下载
–End–
![[每日算法 - 阿里机试] leetcode19. 删除链表的倒数第 N 个结点 「 详细图释一看就懂！」](https://img-blog.csdnimg.cn/a5e03d6ae736460886633f0d52c860be.png)
