/**
* @brief UART common service routine.
*
* @param[in] uartp pointer to the @p UARTDriver object
*/
static void uart_serve_interrupt(UARTDriver *uartp)
{
uint32_t dmachis = HWREG(UDMA_CHIS);
uint32_t mis = HWREG(uartp->uart + UART_O_MIS);
if (mis & UART_MIS_TXMIS) {
/* End of transfer */
_uart_tx2_isr_code(uartp);
}
if (mis & (UART_MIS_OEMIS | UART_MIS_BEMIS | UART_MIS_PEMIS | UART_MIS_FEMIS)) {
/* Error occurred */
_uart_rx_error_isr_code(uartp, translate_errors(mis));
}
if (dmachis & (1 << uartp->dmarxnr)) {
if (uartp->rxstate == UART_RX_IDLE) {
/* Receiver in idle state, a callback is generated, if enabled, for each
received character and then the driver stays in the same state.*/
_uart_rx_idle_code(uartp);
uart_enter_rx_idle_loop(uartp);
}
else {
/* Receiver in active state, a callback is generated, if enabled, after
a completed transfer.*/
_uart_rx_complete_isr_code(uartp);
}
}
if (dmachis & (1 << uartp->dmatxnr)) {
/* A callback is generated, if enabled, after a completed transfer.*/
_uart_tx1_isr_code(uartp);
}
}
/**
* @brief RX DMA common service routine.
*
* @param[in] uartp pointer to the @p UARTDriver object
* @param[in] flags pre-shifted content of the ISR register
*/
static void uart_lld_serve_rx_end_irq(UARTDriver *uartp, uint32_t flags) {
/* DMA errors handling.*/
#if defined(STM32_UART_DMA_ERROR_HOOK)
if ((flags & (STM32_DMA_ISR_TEIF | STM32_DMA_ISR_DMEIF)) != 0) {
STM32_UART_DMA_ERROR_HOOK(uartp);
}
#else
(void)flags;
#endif
if (uartp->rxstate == UART_RX_IDLE) {
/* Receiver in idle state, a callback is generated, if enabled, for each
received character and then the driver stays in the same state.*/
_uart_rx_idle_code(uartp);
}
else {
/* Receiver in active state, a callback is generated, if enabled, after
a completed transfer.*/
dmaStreamDisable(uartp->dmarx);
_uart_rx_complete_isr_code(uartp);
}
}
