/**
* \brief Generate the CRC value for the firmware
*/
static void generate_crc(void)
{
uint32_t buffer_size = 0;
/* Enable CRCCU peripheral clock */
sysclk_enable_peripheral_clock(CRCCU);
/* Reset the CRCCU */
crccu_reset(CRCCU);
/* Open the input file for CRC32 generation */
f_open(&file_object1,
(char const *)input_file_name,
FA_OPEN_EXISTING | FA_READ);
/* Generate the CRC32 for the input binary */
while (true) {
/* Read the data from the firmware */
f_read(&file_object1, (uint8_t *)buffer, FLASH_BUFFER_SIZE,
&buffer_size);
/* Check if there is any buffer */
if (!buffer_size) {
break;
}
/* Set the memory address for CRCCU DMA transfer */
crc_dscr.ul_tr_addr = (uint32_t) buffer;
/* Transfer width: byte, interrupt disable */
crc_dscr.ul_tr_ctrl = CRCCU_TR_CTRL_TRWIDTH_BYTE | buffer_size
| CRCCU_TR_CTRL_IEN_DISABLE;
/* Configure the CRCCU descriptor */
crccu_configure_descriptor(CRCCU, (uint32_t) &crc_dscr);
/* Configure CRCCU mode */
crccu_configure_mode(CRCCU, CRCCU_MR_ENABLE | APP_CRC_POLYNOMIAL_TYPE);
/* Start the CRC calculation */
crccu_enable_dma(CRCCU);
/* Wait for calculation ready */
while ((crccu_get_dma_status(CRCCU) == CRCCU_DMA_SR_DMASR)) {
}
}
/* Store the CRC32 Value */
firmware_crc = crccu_read_crc_value(CRCCU);
/* Enable CRCCU peripheral clock */
sysclk_disable_peripheral_clock(CRCCU);
/* Close the input file */
f_close(&file_object1);
}
/**
* \brief Compute CRC of a buffer.
*
* \param p_buffer The buffer holding the data.
* \param ul_length The buffer length.
* \param ul_polynomial_type The polynomial type(CRCCU_MR_PTYPE_XXX).
*
* \return CRC of the buffer.
*/
static uint32_t compute_crc(uint8_t *p_buffer, uint32_t ul_length,
uint32_t ul_polynomial_type)
{
uint32_t ul_crc;
uint32_t ul_timeout = 0;
/* Reset the CRCCU */
crccu_reset(CRCCU);
memset((void *)&crc_dscr, 0, sizeof(crccu_dscr_type_t));
crc_dscr.ul_tr_addr = (uint32_t) p_buffer;
/* Transfer width: byte, interrupt enable */
crc_dscr.ul_tr_ctrl =
CRCCU_TR_CTRL_TRWIDTH_BYTE | ul_length |
CRCCU_TR_CTRL_IEN_ENABLE;
/* Configure the CRCCU descriptor */
crccu_configure_descriptor(CRCCU, (uint32_t) &crc_dscr);
/* Configure CRCCU mode */
crccu_configure_mode(CRCCU, CRCCU_MR_ENABLE | ul_polynomial_type);
/* Start the CRC calculation */
crccu_enable_dma(CRCCU);
/* Wait for calculation ready */
while ((crccu_get_dma_status(CRCCU) == CRCCU_DMA_SR_DMASR) &&
(ul_timeout++ < CRCCU_TIMEOUT)) {
}
/* Get CRC value */
ul_crc = crccu_read_crc_value(CRCCU);
/* Display CRC */
if (ul_polynomial_type == CRCCU_MR_PTYPE_CCITT16) {
/* 16-bits CRC */
ul_crc &= 0xFFFF;
printf(" CRC of the buffer is 0x%04x\n\r", ul_crc);
} else {
/* 32-bits CRC */
printf(" CRC of the buffer is 0x%08x\n\r", ul_crc);
}
return ul_crc;
}
