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Implement F4 eeprom (#14195)

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This commit is contained in:
Joel Challis
2021-09-15 16:30:26 +01:00
committed by GitHub
parent 6cb8a65884
commit 1a68feb842
5 changed files with 230 additions and 6 deletions
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41
tmk_core/common/chibios/flash_stm32.c
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@ -23,6 +23,29 @@
# define FLASH_SR_WRPERR FLASH_SR_WRPRTERR
#endif
#if defined(EEPROM_EMU_STM32F401xC)
# define FLASH_SR_PGERR (FLASH_SR_PGSERR | FLASH_SR_PGPERR | FLASH_SR_PGAERR)
# define FLASH_KEY1 0x45670123U
# define FLASH_KEY2 0xCDEF89ABU
static uint8_t ADDR2PAGE(uint32_t Page_Address) {
switch (Page_Address) {
case 0x08000000 ... 0x08003FFF:
return 0;
case 0x08004000 ... 0x08007FFF:
return 1;
case 0x08008000 ... 0x0800BFFF:
return 2;
case 0x0800C000 ... 0x0800FFFF:
return 3;
}
// TODO: bad times...
return 7;
}
#endif
/* Delay definition */
#define EraseTimeout ((uint32_t)0x00000FFF)
#define ProgramTimeout ((uint32_t)0x0000001F)
@ -53,7 +76,9 @@ FLASH_Status FLASH_GetStatus(void) {
if ((FLASH->SR & FLASH_SR_WRPERR) != 0) return FLASH_ERROR_WRP;
#if defined(FLASH_OBR_OPTERR)
if ((FLASH->SR & FLASH_OBR_OPTERR) != 0) return FLASH_ERROR_OPT;
#endif
return FLASH_COMPLETE;
}
@ -95,15 +120,24 @@ FLASH_Status FLASH_ErasePage(uint32_t Page_Address) {
if (status == FLASH_COMPLETE) {
/* if the previous operation is completed, proceed to erase the page */
#if defined(FLASH_CR_SNB)
FLASH->CR &= ~FLASH_CR_SNB;
FLASH->CR |= FLASH_CR_SER | (ADDR2PAGE(Page_Address) << FLASH_CR_SNB_Pos);
#else
FLASH->CR |= FLASH_CR_PER;
FLASH->AR = Page_Address;
#endif
FLASH->CR |= FLASH_CR_STRT;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if (status != FLASH_TIMEOUT) {
/* if the erase operation is completed, disable the PER Bit */
/* if the erase operation is completed, disable the configured Bits */
#if defined(FLASH_CR_SNB)
FLASH->CR &= ~(FLASH_CR_SER | FLASH_CR_SNB);
#else
FLASH->CR &= ~FLASH_CR_PER;
#endif
}
FLASH->SR = (FLASH_SR_EOP | FLASH_SR_PGERR | FLASH_SR_WRPERR);
}
@ -126,6 +160,11 @@ FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data) {
status = FLASH_WaitForLastOperation(ProgramTimeout);
if (status == FLASH_COMPLETE) {
/* if the previous operation is completed, proceed to program the new data */
#if defined(FLASH_CR_PSIZE)
FLASH->CR &= ~FLASH_CR_PSIZE;
FLASH->CR |= FLASH_CR_PSIZE_0;
#endif
FLASH->CR |= FLASH_CR_PG;
*(__IO uint16_t*)Address = Data;
/* Wait for last operation to be completed */