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Allow compile-time override of detected flash size.

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On the STM32F103C8, as used in the "blue pill" boards, it has been
determined that, despite these only officially having 64KiB flash, it is
possible to actually use 128KiB of flash.

This commit allows for a preprocessor define
STM32F103_OVERRIDE_FLASH_SIZE which, when set, is used as the size of
flash in KiB instead of reading it from the FLASH_SIZE_REG.
This commit is contained in:
Jeremy Drake
2017-08-02 16:11:34 -07:00
committed by NIIBE Yutaka
parent a4f28ee176
commit 5fe5ff36c4
3 changed files with 17 additions and 0 deletions
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8
mcu/sys-stm32f103.c
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@@ -213,7 +213,11 @@ static int
flash_write (uint32_t dst_addr, const uint8_t *src, size_t len)
{
int status;
#if defined(STM32F103_OVERRIDE_FLASH_SIZE_KB)
uint32_t flash_end = FLASH_START_ADDR + STM32F103_OVERRIDE_FLASH_SIZE_KB*1024;
#else
uint32_t flash_end = FLASH_START_ADDR + (*FLASH_SIZE_REG)*1024;
#endif
if (dst_addr < FLASH_START || dst_addr + len > flash_end)
return 0;
@@ -269,7 +273,11 @@ static void __attribute__((naked))
flash_erase_all_and_exec (void (*entry)(void))
{
uint32_t addr = FLASH_START;
#if defined(STM32F103_OVERRIDE_FLASH_SIZE_KB)
uint32_t end = FLASH_START_ADDR + STM32F103_OVERRIDE_FLASH_SIZE_KB*1024;
#else
uint32_t end = FLASH_START_ADDR + (*FLASH_SIZE_REG)*1024;
#endif
uint32_t page_size = 1024;
int r;