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| author | Damien George <damien.p.george@gmail.com> | 2015-04-18 16:27:53 +0100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2015-04-18 21:40:59 +0100 |
| commit | 6be0bbb886de613adfbd3b653e44e25fbb3569c5 (patch) | |
| tree | c541a3ae6e57c84fdabb6b38cf8a8b5015e0a9b5 /stmhal/storage.c | |
| parent | 5a11086d64cfc824958fbf382251c83d83d4e6ee (diff) | |
| download | micropython-6be0bbb886de613adfbd3b653e44e25fbb3569c5.tar.gz micropython-6be0bbb886de613adfbd3b653e44e25fbb3569c5.zip | |
stmhal: Add support for flash filesystem on F401 MCUs.
It uses a 16k cache buffer and so the filesystem size is limited.
Diffstat (limited to 'stmhal/storage.c')
| -rw-r--r-- | stmhal/storage.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/stmhal/storage.c b/stmhal/storage.c index be5e400ed7..d3dc82a330 100644 --- a/stmhal/storage.c +++ b/stmhal/storage.c @@ -34,10 +34,26 @@ #include "flash.h" #include "storage.h" +#if defined(STM32F405xx) + #define CACHE_MEM_START_ADDR (0x10000000) // CCM data RAM, 64k #define FLASH_PART1_START_BLOCK (0x100) #define FLASH_PART1_NUM_BLOCKS (224) // 16k+16k+16k+64k=112k #define FLASH_MEM_START_ADDR (0x08004000) // sector 1, 16k +#define FLASH_SECTOR_SIZE_MAX (0x10000) // 64k max, size of CCM + +#elif defined(STM32F401xE) + +STATIC byte flash_cache_mem[0x4000] __attribute__((aligned(4))); // 16k +#define CACHE_MEM_START_ADDR (&flash_cache_mem[0]) +#define FLASH_PART1_START_BLOCK (0x100) +#define FLASH_PART1_NUM_BLOCKS (128) // 16k+16k+16k+16k(of64k)=64k +#define FLASH_MEM_START_ADDR (0x08004000) // sector 1, 16k +#define FLASH_SECTOR_SIZE_MAX (0x4000) // 16k max due to size of cache buffer + +#else +#error "no storage support for this MCU" +#endif #define FLASH_FLAG_DIRTY (1) #define FLASH_FLAG_FORCE_WRITE (2) @@ -62,6 +78,9 @@ static uint8_t *flash_cache_get_addr_for_write(uint32_t flash_addr) { uint32_t flash_sector_start; uint32_t flash_sector_size; uint32_t flash_sector_id = flash_get_sector_info(flash_addr, &flash_sector_start, &flash_sector_size); + if (flash_sector_size > FLASH_SECTOR_SIZE_MAX) { + flash_sector_size = FLASH_SECTOR_SIZE_MAX; + } if (flash_cache_sector_id != flash_sector_id) { flash_cache_flush(); memcpy((void*)CACHE_MEM_START_ADDR, (const void*)flash_sector_start, flash_sector_size); |