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Serial Upper Half: Add watermarks to RX flow control logic

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Gregory Nutt
2014-12-27 07:43:06 -06:00
parent 1c39b67e32
commit aefde565d3
6 changed files with 133 additions and 23 deletions
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include/nuttx/serial/serial.h
+7 -4
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@@ -79,8 +79,8 @@
#define uart_receive(dev,s) dev->ops->receive(dev,s)
#ifdef CONFIG_SERIAL_IFLOWCONTROL
#define uart_rxflowcontrol(dev) \
(dev->ops->rxflowcontrol && dev->ops->rxflowcontrol(dev))
#define uart_rxflowcontrol(dev,n,u) \
(dev->ops->rxflowcontrol && dev->ops->rxflowcontrol(dev,n,u))
#endif
/************************************************************************************
@@ -165,9 +165,12 @@ struct uart_ops_s
CODE bool (*rxavailable)(FAR struct uart_dev_s *dev);
#ifdef CONFIG_SERIAL_IFLOWCONTROL
/* Return true if UART activated RX flow control to block more incoming data. */
/* Return true if UART activated RX flow control to block more incoming
* data.
*/
CODE bool (*rxflowcontrol)(FAR struct uart_dev_s *dev);
CODE bool (*rxflowcontrol)(FAR struct uart_dev_s *dev,
unsigned int nbuffered, bool upper);
#endif
/* This method will send one byte on the UART */