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stm32: Extended flash filesystem space to 512K on H743 boards.

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The H743 has equal sized pages of 128k, which means the filesystem doesn't
need to be near the beginning.  This commit moves the filesystem to the
very end of flash, and extends it to 512k (4 pages).

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Ned Konz
2021-08-19 08:12:19 -07:00
committed by Damien George
parent 782d5b2e53
commit 8c214ed200
4 changed files with 31 additions and 21 deletions
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15
ports/stm32/flashbdev.c
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@@ -104,11 +104,16 @@ STATIC byte flash_cache_mem[0x4000] __attribute__((aligned(4))); // 16k
#elif defined(STM32H743xx)
// The STM32H743 flash sectors are 128K
#define CACHE_MEM_START_ADDR (0x20000000) // DTCM data RAM, 128k
#define FLASH_SECTOR_SIZE_MAX (0x20000) // 128k max
#define FLASH_MEM_SEG1_START_ADDR (0x08020000) // sector 1
#define FLASH_MEM_SEG1_NUM_BLOCKS (256) // Sector 1: 128k / 512b = 256 blocks
// The STM32H743 flash sectors are 128K, with locations defined in the linker script
extern uint8_t _flash_fs_start;
extern uint8_t _flash_fs_end;
extern uint8_t _ram_fs_cache_start[];
extern uint8_t _ram_fs_cache_end[];
#define CACHE_MEM_START_ADDR ((uintptr_t)&_ram_fs_cache_start[0])
#define FLASH_SECTOR_SIZE_MAX (&_ram_fs_cache_end[0] - &_ram_fs_cache_start[0])
#define FLASH_MEM_SEG1_START_ADDR ((long)&_flash_fs_start)
#define FLASH_MEM_SEG1_NUM_BLOCKS ((&_flash_fs_end - &_flash_fs_start) / 512)
#elif defined(STM32L432xx) || \
defined(STM32L451xx) || defined(STM32L452xx) || defined(STM32L462xx) || \