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continued implementing flash routines

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This commit is contained in:
Markus Fröschle
2013-02-18 10:22:35 +00:00
parent 8069d83787
commit d7c632c206
1 changed files with 38 additions and 8 deletions
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46
sources/basflash.c
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@@ -111,6 +111,27 @@ extern err_t simulate();
extern err_t memcpy(); extern err_t memcpy();
extern err_t verify(); extern err_t verify();
/*
* unlock a flash sector
*/
err_t unlock_flash_sector(int sector_num)
{
volatile uint32_t rd;
uint32_t size = (sector_num < num_flash_sectors ?
mx29lv640d_flash_sectors[sector_num + 1] - mx29lv640d_flash_sectors[sector_num] :
0);
*flash_unlock1 = cmd_unlock1;
*flash_unlock2 = cmd_unlock2;
*flash_unlock1 = cmd_autoselect;
rd = * (volatile uint32_t *) FLASH_ADDRESS;
* (volatile uint32_t *) FLASH_ADDRESS = size;
(void) rd; /* get rid of "unused variable" compiler warning */
return OK;
}
/* /*
* erase a flash sector * erase a flash sector
* *
@@ -121,15 +142,24 @@ extern err_t verify();
err_t erase_flash_sector(int sector_num) err_t erase_flash_sector(int sector_num)
{ {
volatile uint32_t rd; volatile uint32_t rd;
uint32_t size; uint32_t size = (sector_num < num_flash_sectors ?
mx29lv640d_flash_sectors[sector_num + 1] - mx29lv640d_flash_sectors[sector_num] :
0);
*flash_unlock1 = cmd_unlock1; if (unlock_flash_sector(sector_num) == OK)
*flash_unlock2 = cmd_unlock2; {
*flash_unlock1 = cmd_autoselect; *flash_unlock1 = cmd_unlock1;
rd = * (volatile uint32_t *) FLASH_ADDRESS; *flash_unlock2 = cmd_unlock2;
* (volatile uint32_t *) FLASH_ADDRESS = size; *flash_unlock1 = cmd_sector_erase1;
(void) rd; /* get rid of "unused variable" compiler warning */ *flash_unlock1 = cmd_unlock1;
return OK; *flash_unlock2 = cmd_unlock2;
*flash_unlock1 = cmd_sector_erase1;
rd = * (volatile uint32_t *) FLASH_ADDRESS;
* (volatile uint32_t *) FLASH_ADDRESS = size;
(void) rd; /* get rid of "unused variable" compiler warning */
return OK;
}
return ILLEGAL_SECTOR;
} }
err_t erase_flash_region(void *start_address, uint32_t length) err_t erase_flash_region(void *start_address, uint32_t length)