static inline void usart_rx_irq(const usart_dev *dev) {
#ifdef ISR_PERF
uint32_t t=stopwatch_getticks();
#endif
/* Check on Receive Data register Not Empty interrupt */
uint16_t sr = dev->USARTx->SR;
if( (sr & USART_F_RXNE) && (dev->USARTx->CR1 & USART_MASK_RXNEIE) ){
#ifdef USART_SAFE_INSERT
/* If the buffer is full and the user defines USART_SAFE_INSERT, ignore new bytes. */
rb_safe_insert(dev->rxrb, (uint8_t) dev->USARTx->DR);
#else
/* By default, push bytes around in the ring buffer. */
rb_push_insert(dev->rxrb, (uint8_t)dev->USARTx->DR);
#endif
if(dev->state->callback) {
revo_call_handler(dev->state->callback, (uint32_t)dev);
}
}
if( sr & USART_F_ORE ){
(void)dev->USARTx->DR; // cleared after reading sr, dr
}
#ifdef ISR_PERF
t = stopwatch_getticks() - t;
isr_time += t;
if(t>max_isr_time) max_isr_time=t;
#endif
}
static inline void usart_rx_irq(usart_dev *dev)
{
/* Check on Receive Data register Not Empty interrupt */
if( USART_GetITStatus(dev->USARTx, USART_IT_RXNE) != RESET ){
#ifdef USART_SAFE_INSERT
/* If the buffer is full and the user defines USART_SAFE_INSERT,
* ignore new bytes. */
rb_safe_insert(dev->rxrb, (uint8_t) dev->USARTx->DR);
#else
/* By default, push bytes around in the ring buffer. */
rb_push_insert(dev->rxrb, (uint8_t)dev->USARTx->DR);
#endif
}
}
