/**
* \brief 32-bit checksum of DMA transfer data
*
* This test sets up DMA to do a data block transfer, and sets up
* the CRC module to do a 32 bit checksum on the data. The checksum
* will then be added to another buffer, the same procedure is setup
* with this new buffer which should result in a checksum = 0.
*
* \param test Current test case
*/
static void run_32bit_dma_test(const struct test_case *test)
{
uint32_t checksum;
bool success;
uint8_t data_buf_8bit[LENGTH(data_8bit) + sizeof(uint32_t)];
uint8_t data_8bit_cpy[LENGTH(data_8bit) + sizeof(uint32_t)];
setup_dma_channel(LENGTH(data_8bit),
(uint8_t *)data_8bit, data_buf_8bit);
crc_dma_checksum_start(CONF_TEST_DMACH, CRC_32BIT);
dma_channel_trigger_block_transfer(CONF_TEST_DMACH);
success = wait_for_dma_transfer(test);
dma_channel_disable(CONF_TEST_DMACH);
dma_disable();
checksum = crc_dma_checksum_stop();
if (!success) {
return;
}
test_assert_true(test, checksum == CRC_CHECKSUM_32BIT,
"Checksum mismatch on DMA CRC-32 test");
memcpy(data_8bit_cpy, data_8bit, LENGTH(data_8bit));
crc32_append_value(checksum,
&data_8bit_cpy[LENGTH(data_8bit_cpy) - sizeof(uint32_t)]);
setup_dma_channel(LENGTH(data_8bit_cpy),
(uint8_t *)data_8bit_cpy, data_buf_8bit);
crc_dma_checksum_start(CONF_TEST_DMACH, CRC_32BIT);
dma_channel_trigger_block_transfer(CONF_TEST_DMACH);
success = wait_for_dma_transfer(test);
dma_channel_disable(CONF_TEST_DMACH);
dma_disable();
checksum = crc_dma_checksum_stop();
if (!success) {
return;
}
test_assert_true(test, checksum == 0,
"Checksum fail check failed on DMA CRC-16 test");
}
/**
* \internal
* \brief Callback for DMA transfer complete
*
* \param status Status of a completed (or failed) DMA transfer
*/
static void example_crc_dma_transfer_done(enum dma_channel_status status)
{
uint32_t checksum;
checksum = crc_dma_checksum_stop();
if (checksum == 0) {
// Light the second LED to indicate that checksum is zero
LED_On(LED1_GPIO);
}
}