diff options
| -rw-r--r-- | nuttx/drivers/serialirq.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/nuttx/drivers/serialirq.c b/nuttx/drivers/serialirq.c index ba859c2ef..f7503e4cc 100644 --- a/nuttx/drivers/serialirq.c +++ b/nuttx/drivers/serialirq.c @@ -84,13 +84,21 @@ void uart_xmitchars(FAR uart_dev_t *dev) while (dev->xmit.head != dev->xmit.tail && uart_txready(dev)) { + /* Send the next byte */ + uart_send(dev, dev->xmit.buffer[dev->xmit.tail]); + /* Increment the tail index */ + if (++(dev->xmit.tail) >= dev->xmit.size) { dev->xmit.tail = 0; } + /* A byte was removed from the buffer. Inform any waiters + * there there is space available. + */ + if (dev->xmitwaiting) { dev->xmitwaiting = FALSE; @@ -139,7 +147,7 @@ void uart_recvchars(FAR uart_dev_t *dev) dev->recv.buffer[dev->recv.head] = uart_receive(dev, &status); - /* Increment the index */ + /* Increment the head index */ dev->recv.head = nexthead; if (++nexthead >= dev->recv.size) |