diff options
Diffstat (limited to 'nuttx/include/nuttx/serial/serial.h')
| -rw-r--r-- | nuttx/include/nuttx/serial/serial.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/nuttx/include/nuttx/serial/serial.h b/nuttx/include/nuttx/serial/serial.h index 7f5ea9170..04143062a 100644 --- a/nuttx/include/nuttx/serial/serial.h +++ b/nuttx/include/nuttx/serial/serial.h @@ -47,7 +47,7 @@ #include <stdbool.h> #include <semaphore.h> #ifdef CONFIG_SERIAL_TERMIOS -# include <termios.h> +# include <termios.h> #endif #include <nuttx/fs/fs.h> @@ -77,6 +77,7 @@ #define uart_txempty(dev) dev->ops->txempty(dev) #define uart_send(dev,ch) dev->ops->send(dev,ch) #define uart_receive(dev,s) dev->ops->receive(dev,s) +#define uart_onrxdeque(dev) if(dev->ops->onrxdeque) dev->ops->onrxdeque(dev) /************************************************************************************ * Public Types @@ -180,6 +181,14 @@ struct uart_ops_s */ CODE bool (*txempty)(FAR struct uart_dev_s *dev); + + /* + * Drivers can optionally provide this callback which is invoked any time + * received characters have been dequeued in uart_read(). The expected + * use-case is for reenabling nRTS if the driver is doing software assisted + * HW flow control. + */ + CODE void (*onrxdeque)(FAR struct uart_dev_s *dev); }; /* This is the device structure used by the driver. The caller of @@ -335,6 +344,16 @@ void uart_datasent(FAR uart_dev_t *dev); void uart_connected(FAR uart_dev_t *dev, bool connected); #endif +/************************************************************************************ + * Name: uart_numrxavail + * + * Description: + * This function returns the number of characters that are currently available for + * reading. + * + ************************************************************************************/ +ssize_t uart_numrxavail(FAR uart_dev_t *dev); + #undef EXTERN #if defined(__cplusplus) } |