[MCU Notes] STM8S series MCU FLASH operation

    1. Modify the comments of stm8s_conf.h to allow #include "stm8s_flash.h" to compile

    2. Modify the injection of stm8s.h to enable the Flash function to run from RAM

#if !defined (RAM_EXECUTION)

    #define RAM_EXECUTION (1) // When writing to a block, you must enable injection here

#endif /* RAM_EXECUTION */

   3. After the modification is completed, a lot of warnings will be generated. The method to eliminate them has not been found yet, but it will not affect the operation of the code.

Attach the code:

#include "fy_flash.h"

//Before operating the flash, you need to uncomment line 154 in stm8s.h /* #define RAM_EXECUTION (1) */

//Read data from the specified third byte of the block (entry number)

u8 Flash_ReadByte_3(u8 Block)

{ 

  u32 addr;

  addr = FLASH_PROG_START_PHYSICAL_ADDRESS + Block*FLASH_BLOCK_SIZE;

  return FLASH_ReadByte(addr+2);

}

//Write the content to the specified block of Flash

void Flash_WriteBlock(u8 Block , u8 *buf)

{  

  if(Block>FLASH_PROG_BLOCKS_NUMBER) return;

  FLASH_Unlock(FLASH_MEMTYPE_PROG); //解锁flash

  while (FLASH_GetFlagStatus(FLASH_FLAG_PUL) == RESET); //Wait for the unlock flag to be set

  //Block standard programming, before writing, the hardware automatically deletes the content

  FLASH_ProgramBlock(Block, FLASH_MEMTYPE_PROG, FLASH_PROGRAMMODE_STANDARD,buf);

  //Wait for the operation to complete

  FLASH_WaitForLastOperation(FLASH_MEMTYPE_PROG);

  //Lock after operation

  FLASH_Lock(FLASH_MEMTYPE_PROG);   

}

//Read the contents of the specified number of blocks from Flash

void Flash_ReadBlock(u8 Block ,u8 *buf)

{

  u8 i;

  u32 addr;

  u8 sta=0;

  if(Block>FLASH_PROG_BLOCKS_NUMBER) return;

  //Calculate the address

  addr = FLASH_PROG_START_PHYSICAL_ADDRESS + Block*FLASH_BLOCK_SIZE;

  for(i=0;i

  {

*(buf+i) = FLASH_ReadByte(addr+i); //Read a block of data

/* if(buf[i]=='\r' && sta==0) sta=1;

else if(buf[i]=='\n' && sta==1) return;

else state=0;

*/

  }

}

void Flash_Test(void)

{

u8 write_buf[FLASH_BLOCK_SIZE]="MARS->This is a Flash Data Memory write and read test...\r\n";

u8 read_buf[FLASH_BLOCK_SIZE];

Flash_WriteBlock(120,write_buf);

Flash_ReadBlock(120,read_buf);

UART1_SendString(read_buf);

while(1)

{

  LED_TOG;Delay_ms(350);

}

}

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