Hello,
I'm having trouble getting the interrupt for the RNG on the STM32F207 to trigger. Below is a code snippet of what I'm doing;.
void generate_rnd_num(uint32_t *rnd_num)
{
RNG_HandleTypeDef rng_handler;
rng_handler.Instance = RNG // Point to RNG Peripheral base addr (RNG_BASE = (AHB2PERIPH_BASE + 0x60800))
__RNG_CLK_ENABLE(); // Enable RNG Clock: (RCC->AHB2ENR |= (RCC_AHB2ENR_RNGEN))
__HAL_RNG_ENABLE(&rng_handler) // Enale RNG Peripheral: ((__HANDLE__)->Instance->CR |= RNG_CR_RNGEN)
__HAL_RNG_ENABLE_IT(&rng_handler) // Enable RNG Interrupts: ((__HANDLE__)->Instance->CR |= RNG_CR_IE)
...
// Waiting for a sempahore to be released
...
}
/* --------------------------- STM HAL --------------------------- */
void HAL_RNG_IRQHandler(RNG_HandleTypeDef *hrng)
{
...
/* Check RNG data ready flag */
if(__HAL_RNG_GET_FLAG(hrng, RNG_FLAG_DRDY) != RESET)
{
/* Data Ready callback */
HAL_RNG_ReadyCallback(hrng);
/* Change RNG peripheral state */
hrng->State = HAL_RNG_STATE_READY;
/* Clear the RNG Data Ready flag */
__HAL_RNG_CLEAR_FLAG(hrng, RNG_FLAG_DRDY);
/* Process Unlocked */
__HAL_UNLOCK(hrng);
}
}
/* --------------------------- STM HAL --------------------------- */
void HAL_RNG_ReadyCallback(RNG_HandleTypeDef* hrng)
{
// Release semaphore
}
The IRQ handler (HAL_RNG_IRQHandler) is never reached. I should mention that polling for the random number works; the interrupt is just not triggering. The vector table also contains the correct IRQ handler and its definition calls HAL_RNG_ReadyCallback. Am I missing something?
Thanks
