Workflow

Make the application loop infinitely.

while (true) {

Start an asynchronous TRNG read job, to store random data into the global buffer and generate a callback when complete.

trng_read_buffer_job(&trng_instance, random_buffer, 5);

Wait until the asynchronous read job is complete.

while (!trng_read_done) {
}
trng_read_done = false;

Toggle the board LED to indicate specific size of random data were read.

port_pin_toggle_output_level(LED_0_PIN);
/* Add a short delay to see LED toggle */
volatile uint32_t delay = 50000;
while(delay--) {
}