/**
* @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.*/
if (uartp->config->rxchar_cb != NULL)
uartp->config->rxchar_cb(uartp, uartp->rxbuf);
}
else {
/* Receiver in active state, a callback is generated, if enabled, after
a completed transfer.*/
dmaStreamDisable(uartp->dmarx);
uartp->rxstate = UART_RX_COMPLETE;
if (uartp->config->rxend_cb != NULL)
uartp->config->rxend_cb(uartp);
/* If the callback didn't explicitly change state then the receiver
automatically returns to the idle state.*/
if (uartp->rxstate == UART_RX_COMPLETE) {
uartp->rxstate = UART_RX_IDLE;
set_rx_idle_loop(uartp);
}
}
}
/**
* @brief TX 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_tx_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
dmaStreamDisable(uartp->dmatx);
/* Only enable TC interrupt if there's a callback attached to it.
We have to do it here, rather than earlier, because TC flag is set
until transmission starts.*/
if (uartp->config->txend2_cb != NULL)
uartp->usart->CR1 |= USART_CR1_TCIE;
/* A callback is generated, if enabled, after a completed transfer.*/
uartp->txstate = UART_TX_COMPLETE;
if (uartp->config->txend1_cb != NULL)
uartp->config->txend1_cb(uartp);
/* If the callback didn't explicitly change state then the transmitter
automatically returns to the idle state.*/
if (uartp->txstate == UART_TX_COMPLETE)
uartp->txstate = UART_TX_IDLE;
}
/**
* @brief TX 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_tx_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
dmaStreamDisable(uartp->dmatx);
/* A callback is generated, if enabled, after a completed transfer.*/
_uart_tx1_isr_code(uartp);
}
/**
* @brief TX 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_tx_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
dmaStreamDisable(uartp->dmatx);
/* A callback is generated, if enabled, after a completed transfer.*/
uartp->txstate = UART_TX_COMPLETE;
if (uartp->config->txend1_cb != NULL)
uartp->config->txend1_cb(uartp);
/* If the callback didn't explicitly change state then the transmitter
automatically returns to the idle state.*/
if (uartp->txstate == UART_TX_COMPLETE)
uartp->txstate = UART_TX_IDLE;
}
/**
* @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);
}
}
