Hello,
I am trying to set up an external flash memory (MX25V1635F) on a Nucleo-U575ZI-Q.
I have successfully used the low-level drivers (LLD) from the manufacturer Macronix and integrated them into the Levelx functions:
UINT lx_stm32_nor_custom_driver_initialize(LX_NOR_FLASH *nor_flash)
{
UINT ret = LX_SUCCESS;
ULONG total_blocks = 0;
ULONG words_per_block = 0;
/* USER CODE BEGIN Init_Section_0 */
total_blocks = 32;
words_per_block = 16384;
nor_flash->lx_nor_flash_base_address = 0;
/* USER CODE END Init_Section_0 */
nor_flash->lx_nor_flash_total_blocks = total_blocks;
nor_flash->lx_nor_flash_words_per_block = words_per_block;
/* USER CODE BEGIN Init_Section_1 */
/* USER CODE END Init_Section_1 */
nor_flash->lx_nor_flash_driver_read = lx_nor_driver_read;
nor_flash->lx_nor_flash_driver_write = lx_nor_driver_write;
nor_flash->lx_nor_flash_driver_block_erase = lx_nor_driver_block_erase;
nor_flash->lx_nor_flash_driver_block_erased_verify = lx_nor_driver_block_erased_verify;
#ifndef LX_DIRECT_READ
nor_flash->lx_nor_flash_sector_buffer = nor_sector_memory;
#endif
/* USER CODE BEGIN Init_Section_2 */
/* USER CODE END Init_Section_2 */
return ret;
}
static UINT lx_nor_driver_read(ULONG *flash_address, ULONG *destination, ULONG words)
{
UINT ret = LX_SUCCESS;
/* USER CODE BEGIN NOR_READ */
uint32 byte_addr = (uint32)(*flash_address);
uint32 byte_len = words * sizeof(ULONG);
if (CMD_READ(byte_addr, (uint8*)destination, byte_len) != FlashOperationSuccess){
ret = LX_ERROR;
}
/* USER CODE END NOR_READ */
return ret;
}static UINT lx_nor_driver_write(ULONG *flash_address, ULONG *source, ULONG words)
{
UINT ret = LX_SUCCESS;
/* USER CODE BEGIN NOR_DRIVER_WRITE */
uint32 byte_addr = (uint32)(*flash_address);
uint32 byte_len = words * sizeof(ULONG);
// Programmer page par page (Max 256 bytes)
uint32 offset = 0;
uint32 chunk;
while (offset < byte_len)
{
if ((byte_len - offset) > 256)
{
chunk = 256;
}
else
{
chunk = byte_len - offset;
}
if (CMD_PP(byte_addr + offset, ((uint8*)source) + offset, chunk) != FlashOperationSuccess)
{
ret = LX_ERROR;
break;
}
offset += chunk;
}
/* USER CODE END NOR_DRIVER_WRITE */
return ret;
}static UINT lx_nor_driver_block_erased_verify(ULONG block)
{
UINT ret = LX_SUCCESS;
/* USER CODE BEGIN NOR_DRIVER_VERIFY */
uint32 byte_addr = block * NOR_SECTOR_SIZE;
uint8 buffer[256];
for (int offset = 0; offset < NOR_SECTOR_SIZE; offset += 256)
{
if (CMD_READ(byte_addr + offset, buffer, 256) != FlashOperationSuccess)
return LX_ERROR;
for (int i = 0; i < 256; i++)
{
if (buffer[i] != 0xFF)
return LX_ERROR;
}
}
/* USER CODE END NOR_DRIVER_VERIFY */
return ret;
}static UINT lx_nor_driver_block_erase(ULONG block, ULONG erase_count)
{
UINT ret = LX_SUCCESS;
/* USER CODE BEGIN NOR_DRIVER_BLOCK */
uint32 byte_addr = block * NOR_SECTOR_SIZE;
for (ULONG i = 0; i < erase_count; i++)
{
if (CMD_SE(byte_addr) != FlashOperationSuccess)
{
ret = LX_ERROR;
break;
}
byte_addr += NOR_SECTOR_SIZE;
}
/* USER CODE END NOR_DRIVER_BLOCK */
return ret;
}
I can read the values I wrote to my flash in debug mode using these functions.
Here are my settings in the ioc :
When I try to format my flash memory:
lx_stm32_nor_custom_driver_initialize(&nor_flash);
MX_FileX_Init();
/* Format the NOR flash as FAT */
status = fx_media_format(&nor_flash_disk,
fx_stm32_levelx_nor_driver, // Driver entry
(VOID*)NOR_CUSTOM_DRIVER_ID, // Device info pointer
(UCHAR*)media_memory, // Media buffer pointer
sizeof(media_memory), // Media buffer size
"NOR_FLASH_DISK", // Volume Name
1, // Number of FATs
32, // Directory Entries
0, // Hidden sectors
TOTAL_SECTOR_LOGICAL, // Total sectors
SECTOR_SIZE_LOGICAL, // Sector size
8, // Sectors per cluster
1, // Heads
1); // Sectors per track
/* Check if the format status */
if (status != FX_SUCCESS)
{
Error_Handler();
}
/* Open the SPI NOR Flash disk driver. */
status = fx_media_open(&nor_flash_disk, "FX_LX_NOR_DISK", fx_stm32_levelx_nor_driver,(VOID*)NOR_CUSTOM_DRIVER_ID , media_memory, sizeof(media_memory));
/* Check the media open status. */
if (status != FX_SUCCESS)
{
Error_Handler();
}The code encounters an error on line 677 of the lx_nor_flash_open.c file:
/* Determine if the sector is free. */
else if (block_word == LX_NOR_PHYSICAL_SECTOR_FREE)
{
/* A free entry when there are still used sectors implies that the sector was allocated and a power interruption
took place prior to writing the new logical sector number into the list. */
/* Is this the first time? */
if (nor_flash -> lx_nor_flash_diagnostic_mapping_invalidated)
{
/* No, this is a potential format error, since this should only happen once in a given
NOR flash format. */
_lx_nor_flash_system_error(nor_flash, LX_SYSTEM_INVALID_FORMAT);
/* Return an error. */
return(LX_ERROR);
}Do you have any recommendations?
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