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Optimize uart buffer counter incrementing.

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This commit is contained in:
Dominic Clifton 2014-12-12 18:23:40 +00:00
parent 39f9b799d3
commit 6610a91ce0
2 changed files with 4 additions and 8 deletions
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6
src/main/drivers/serial_uart_stm32f10x.c
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@ -58,8 +58,7 @@ void usartIrqCallback(uartPort_t *s)
if (s->port.callback) {
s->port.callback(s->USARTx->DR);
} else {
s->port.rxBuffer[s->port.rxBufferHead] = s->USARTx->DR;
s->port.rxBufferHead++;
s->port.rxBuffer[s->port.rxBufferHead++] = s->USARTx->DR;
if (s->port.rxBufferHead >= s->port.rxBufferSize) {
s->port.rxBufferHead = 0;
}
@ -67,8 +66,7 @@ void usartIrqCallback(uartPort_t *s)
}
if (SR & USART_FLAG_TXE) {
if (s->port.txBufferTail != s->port.txBufferHead) {
s->USARTx->DR = s->port.txBuffer[s->port.txBufferTail];
s->port.txBufferTail++;
s->USARTx->DR = s->port.txBuffer[s->port.txBufferTail++];
if (s->port.txBufferTail >= s->port.txBufferSize) {
s->port.txBufferTail = 0;
}