/**************************************************************************************************
* @fn crcCalcDLDMA
*
* @brief Run the CRC16 Polynomial calculation over the DL image,
* using DMA to read the flash memory into the CRC register
*
* input parameters
*
* None.
*
* output parameters
*
* None.
*
* @return The CRC16 calculated.
**************************************************************************************************
*/
static uint16 crcCalcDLDMA(void)
{
uint8 pageBeg = OAD_IMG_D_PAGE;
uint8 pageEnd = oadBlkTot / OAD_BLOCKS_PER_PAGE;
#if defined HAL_IMAGE_B
pageEnd += OAD_IMG_D_PAGE + OAD_IMG_B_AREA;
#else
pageEnd += OAD_IMG_D_PAGE;
#endif
HalCRCInit(0x0000); // Seed thd CRC calculation with zero.
// Handle first page differently to skip CRC and CRC shadow when calculating
DMAExecCrc(pageBeg, 4, HAL_FLASH_PAGE_SIZE-4);
// Do remaining pages
for (uint8 pg = pageBeg + 1; pg < pageEnd; pg++)
{
#if defined HAL_IMAGE_B // Means we are receiving ImgA, so skip ImgB pages
if (pg == OAD_IMG_B_PAGE)
{
pg += OAD_IMG_B_AREA;
}
#endif
DMAExecCrc(pg, 0, HAL_FLASH_PAGE_SIZE);
}
return HalCRCCalc();
}
/**************************************************************************************************
* @fn crcCalcDMA
*
* @brief Run the CRC16 Polynomial calculation over the image specified,
* using DMA to read the flash memory into the CRC register
*
* input parameters
*
* @param page - Flash page on which to beging the CRC calculation.
*
* output parameters
*
* None.
*
* @return The CRC16 calculated.
**************************************************************************************************
*/
static uint16 crcCalcDMA(uint8 page)
{
uint16 crc;
uint8 pageBeg;
uint8 pageEnd;
const img_hdr_t *pImgHdr;
HalFlashRead(page, 0, pgBuf, HAL_FLASH_PAGE_SIZE);
pImgHdr = (const img_hdr_t *)(pgBuf + BIM_HDR_OSET);
pageBeg = page;
pageEnd = pImgHdr->len / (HAL_FLASH_PAGE_SIZE / HAL_FLASH_WORD_SIZE);
// One page is used for BIM, so we move this image's last page forward
pageEnd += pageBeg;
// If image A, set last page to be ImgA size + ImgB size
if (pageBeg == BIM_IMG_A_PAGE)
{
pageEnd += BIM_IMG_B_AREA;
}
ADCCON1 &= 0xF3; // CRC configuration of LRSR.
// CRC seed of 0x0000.
RNDL = 0x00;
RNDL = 0x00;
// Handle first page differently to skip CRC and CRC shadow when calculating
DMAExecCrc(pageBeg, 4, HAL_FLASH_PAGE_SIZE-4);
// Do remaining pages
for (uint8 pg = pageBeg + 1; pg < pageEnd; pg++)
{
if (pg == BIM_IMG_B_PAGE)
{
pg += BIM_IMG_B_AREA;
}
DMAExecCrc(pg, 0, HAL_FLASH_PAGE_SIZE);
}
crc = RNDH;
crc = (crc << 8) | RNDL;
return crc;
}
