Good Day,
I have seen the below bootloader code on the web and is posting to see if someone familiar could explain in detail on how the microcontroller is erased and how the new firmware is pushed?
{
while((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0); // Wait if operation in progress
FTFC->FSTAT = FTFC_FSTAT_ACCERR_MASK | FTFC_FSTAT_FPVIOL_MASK;
FTFC->FCCOB[3] = 0x09; // Erase flash sector command
FTFC->FCCOB[2] = (0x8000 >> 16) & 0xff; // Flash address [23:16]
FTFC->FCCOB[1] = (0x8000 >> & 0xff; // Flash address [15:08]
FTFC->FCCOB[0] = 0x8000 & 0xff; // Flash address [7:0]
FTFC->FSTAT = FTFC_FSTAT_CCIF_MASK; // Launch command
while((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0); // Wait for done
if(!(FTFC->FSTAT & FTFC_FSTAT_MGSTAT0_MASK))
continue; // Error occurred
if((*((uint32_t*)APP_START_ADDRESS)) == 0xFFFFFFFF) // Check if the sector was actually cleared
{
S32_SCB->AIRCR = S32_SCB_AIRCR_VECTKEY(0x5FA) | S32_SCB_AIRCR_SYSRESETREQ(1);
}
