usart/usart_flow.h¶

Handles flow control for USART.

Date: 2017/10/15
Author: Jamie K. Phan

Defines

USART__DIRECTION_PN¶

USART__DIRECTION_NP¶

USART__FLOWCTRL_ASSERT¶

USART__FLOWCTRL_DEASSERT¶

Functions

int usart_cts_status(void)¶

Interface into vars (try to keep that private!)

Return: 1 if clear to send

void usart_mode4_flow(int, int)¶

Implements the necessary flow control for the USART.

Return

0 on success, 1 on failure

Parameters

direction: The direction of the flow (DP to DN) or (DN to DP). Ensure Pre-processor macros are used to ensure portability
value: The flow to be handled; either (assert) or (deassert)

void update_port_usart(void)¶: Updates the port values based on the uart_vars. This is to ensure resources are shared correctly.