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
}
void SysTick_Handler(void)
{
systick_uptime_millis++;
uint8_t i;
for(i=0; i< num_handlers; i++) {
if(systick_handlers[i])
revo_call_handler(systick_handlers[i], 0);
}
}
static void dispatch_handler(dma_stream stream) {
#ifdef ISR_PERF
t = stopwatch_getticks();
#endif
const dma_dev * dev=DMAS[(stream>>4) & 3];
Handler handler = dev->handlers[stream & 0xF];
if (handler) {
revo_call_handler(handler, (uint32_t)stream);
}
dma_clear_isr_bits(stream); /* in case handler doesn't */
#ifdef ISR_PERF
t = stopwatch_getticks() - t;
isr_time += t;
if(t>max_isr_time) max_isr_time=t;
#endif
}
