Posted on August 25, 2016 at 09:11
Usage of the debugger is just done hence I noticed that the functionality was not running.
It seems that the flash registers are all set (except for the FAR register (Flash Address Register)). I know that it is marked as write only, but how can I make sure that it is actually set, when the process fails?
The code that I turned to use is as previously mentioned the code from the reference manual:
/* (1) Set the PER bit in the FLASH_CR register to enable page erasing */
/* (2) Program the FLASH_AR register to select a page to erase */
/* (3) Set the STRT bit in the FLASH_CR register to start the erasing */
/* (4) Wait until the BSY bit is reset in the FLASH_SR register */
/* (5) Check the EOP flag in the FLASH_SR register */
/* (6) Clear EOP flag by software by writing EOP at 1 */
/* (7) Reset the PER Bit to disable the page erase */
FLASH->CR |= FLASH_CR_PER;
/* (1) */
FLASH->AR = page_addr;
/* (2) */
FLASH->CR |= FLASH_CR_STRT;
/* (3) */
while
((FLASH->SR & FLASH_SR_BSY) != 0)
/* (4) */
{
/* For robust implementation, add here time-out management */
}
if
((FLASH->SR & FLASH_SR_EOP) != 0)
/* (5) */
{
FLASH->SR |= FLASH_SR_EOP;
/* (6)*/
}
else
{
/* Manage the error cases */
}
FLASH->CR &= ~FLASH_CR_PER;
/* (7) */
I might need to mention that the MCU is running an OS, but the OS is stopped during flash operation. Is it required to disable interrupts as well? (I have tried with that too with same poor result, but I am not sure if it is required.)
