/******************************************************************************
* @fn bootMain
*
* @brief ISR for the reset vector.
*
* @param None.
*
* @return None.
*/
void bootMain(void)
{
extern void _ivecRst2(void); // hal_ivec.s43 defines this reset re-direct operation.
HAL_BOOT_INIT();
vddWait(VDD_MIN_RUN);
while (1)
{
uint16 crc[2];
crc[0] = *((uint16*)LO_ROM_BEG);
crc[1] = *((uint16*)LO_ROM_BEG+1);
if (crc[0] == crc[1])
{
break;
}
else if ((crc[0] != 0) && (crc[0] == crcCalc()))
{
FCTL3 = FWKEY; // Clear Lock bit.
FCTL1 = FWKEY + WRT; // Set WRT bit for write operation
*((uint16*)LO_ROM_BEG+1) = crc[0]; // Write CRC shadow
FCTL1 = FWKEY; // Clear WRT bit
FCTL3 = FWKEY + LOCK; // Set LOCK bit
}
else
{
dl2rc();
}
}
_ivecRst2();
}
void main(void)
{
HAL_BOARD_INIT();
#if HAL_OTA_XNV_IS_SPI
XNV_SPI_INIT();
#endif
/* This is in place of calling HalDmaInit() which would require init of the
* other 4 DMA descriptors in addition to just Channel 0.
*/
HAL_DMA_SET_ADDR_DESC0( &dmaCh0 );
while (1)
{
HalFlashRead(HAL_OTA_CRC_ADDR / HAL_FLASH_PAGE_SIZE,
HAL_OTA_CRC_ADDR % HAL_FLASH_PAGE_SIZE,
(uint8 *)&OTA_crcControl, sizeof(OTA_crcControl));
if (OTA_crcControl.crc[0] == OTA_crcControl.crc[1])
{
break;
}
else if ((OTA_crcControl.crc[0] != 0) && (OTA_crcControl.crc[0] == crcCalc()))
{
OTA_crcControl.crc[1] = OTA_crcControl.crc[0];
HalFlashWrite((HAL_OTA_CRC_ADDR / HAL_FLASH_WORD_SIZE), (uint8 *)OTA_crcControl.crc, 1);
}
else
{
dl2rc();
}
}
// Simulate a reset for the Application code by an absolute jump to location 0x0800.
asm("LJMP 0x800\n");
}
void main(void)
{
uint16 crc[2];
HAL_BOARD_INIT();
#if HAL_OAD_XNV_IS_SPI
XNV_SPI_INIT();
#endif
/* This is in place of calling HalDmaInit() which would require init of the other 4 DMA
* descriptors in addition to just Channel 0.
*/
HAL_DMA_SET_ADDR_DESC0( &dmaCh0 );
HalFlashInit();
HalFlashRead(HAL_OAD_CRC_ADDR / HAL_FLASH_PAGE_SIZE,
HAL_OAD_CRC_ADDR % HAL_FLASH_PAGE_SIZE,
(uint8 *)crc, sizeof(crc));
if (crc[0] != crc[1])
{
// If the CRC is erased or the RC code fails a sanity check, instantiate the DL code (again).
if ((crc[0] == 0) || (crc[0] != crcCalc()))
{
dl2rc();
/* If dl2rc() fails, a flawed image is allowed to run -
* maybe the damage is not fatal to OTA ops?
*/
}
else
{
crc[1] = crc[0];
HalFlashWrite((HAL_OAD_CRC_ADDR / HAL_FLASH_WORD_SIZE), (uint8 *)crc, 1);
}
}
// Simulate a reset for the Application code by an absolute jump to location 0x0800.
asm("LJMP 0x800\n");
}