/**
* \internal
* \brief TRNG callback mode test function
*
* This test reads three random data in callback mode and check the result.
*
* \param test Current test case.
*/
static void run_trng_callback_read_test(const struct test_case *test)
{
uint32_t timeout = 84 * 3;
uint32_t random_result[3];
/* Register and enable TRNG read callback */
trng_register_callback(&trng_instance, trng_complete_callback,
TRNG_CALLBACK_READ_BUFFER);
trng_enable_callback(&trng_instance, TRNG_CALLBACK_READ_BUFFER);
/* Start TRNG read job */
trng_read_buffer_job(&trng_instance, random_result, 3);
do {
timeout--;
if (interrupt_flag) {
break;
}
} while (timeout > 0);
test_assert_true(test, timeout,
"Fail to read random data in callback mode.");
/* Assume there is no probability to read same three
* consecutive random number */
if ((random_result[0] == random_result[1]) &&
(random_result[0] == random_result[2])) {
test_assert_true(test, false,
"Get same random data in polling mode.");
}
/* Test done, disable read callback and TRNG instance */
trng_disable_callback(&trng_instance, TRNG_CALLBACK_READ_BUFFER);
trng_disable(&trng_instance);
}
/** Deinitialize the TRNG peripheral
*
* @param obj The TRNG object
*/
void trng_free(trng_t *obj)
{
(void)obj;
trng_disable();
}
