diff options
Diffstat (limited to 'laser-tag software/flash.c')
| -rw-r--r-- | laser-tag software/flash.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/laser-tag software/flash.c b/laser-tag software/flash.c index f1e2a93..f8e8327 100644 --- a/laser-tag software/flash.c +++ b/laser-tag software/flash.c @@ -1,4 +1,5 @@ #include <stdint.h> +#include <string.h> #include "flash.h" #include "fsl_debug_console.h" #include "SSD_FTFx.h" @@ -18,6 +19,7 @@ FLASH_SSD_CONFIG flash_config = { uint8_t ram_fn[0x30]; pFLASHCOMMANDSEQUENCE pFlashCommandSequence; +uint8_t *images[IMAGE_COUNT]; int flash_init() { @@ -32,6 +34,50 @@ int flash_init() (intptr_t)ram_fn, sizeof ram_fn, (intptr_t)FlashCommandSequence); + + /* Our images are in the 2nd block and take up 4096 bytes */ + int i; + for (i = 0; i < IMAGE_COUNT; ++i) { + images[i] = (uint8_t *)flash_config.PFlashBase + + FSL_FEATURE_FLASH_PFLASH_BLOCK_SIZE + i * 4096; + } + return 0; +} + +#define SECTOR_SIZE (FSL_FEATURE_FLASH_PFLASH_BLOCK_SECTOR_SIZE) +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +uint8_t RMW_buffer[SECTOR_SIZE]; + +int flash_write(uint32_t addr, uint8_t *data, uint32_t len) +{ + uint32_t sector; + uint32_t end = addr + len; + + for (sector = addr / SECTOR_SIZE * SECTOR_SIZE; + sector < end; + data += SECTOR_SIZE - (addr - sector), + len -= SECTOR_SIZE - (addr - sector), + sector += SECTOR_SIZE, + addr = sector) { + uint32_t rc; + + memcpy(RMW_buffer, (void *)sector, SECTOR_SIZE); + memcpy(&RMW_buffer[addr - sector], + data, + MIN(SECTOR_SIZE - (addr - sector), len)); + rc = FlashEraseSector(&flash_config, sector, SECTOR_SIZE, + pFlashCommandSequence); + if (FTFx_OK != rc) { + debug_printf("Error erasing sector 0x%08x: %u\r\n", sector, rc); + return -1; + } + rc = FlashProgram(&flash_config, sector, SECTOR_SIZE, RMW_buffer, + pFlashCommandSequence); + if (FTFx_OK != rc) { + debug_printf("Error programming sector 0x%08x: %u\r\n", sector, rc); + return -1; + } + } return 0; } |