eive-obsw/libcsp/include/csp/drivers/usart.h
2020-12-20 13:31:44 +01:00

108 lines
2.7 KiB
C

/*
Cubesat Space Protocol - A small network-layer protocol designed for Cubesats
Copyright (C) 2012 GomSpace ApS (http://www.gomspace.com)
Copyright (C) 2012 AAUSAT3 Project (http://aausat3.space.aau.dk)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Common USART interface,
* This file is derived from the Gomspace USART driver,
* the main difference is the assumption that only one USART will be present on a PC
*/
#ifndef USART_H_
#define USART_H_
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
Usart configuration, to be used with the usart_init call.
*/
struct usart_conf {
//! USART device.
const char *device;
//! bits per second.
uint32_t baudrate;
//! Number of data bits.
uint8_t databits;
//! Number of stop bits.
uint8_t stopbits;
//! Parity setting.
uint8_t paritysetting;
//! Enable parity checking (Windows only).
uint8_t checkparity;
};
/**
Initialise UART with the usart_conf data structure
@param[in] conf full configuration structure
*/
void usart_init(struct usart_conf *conf);
/**
In order to catch incoming chars use the callback.
Only one callback per interface.
@param[in] handle usart[0,1,2,3]
@param[in] callback function pointer
*/
typedef void (*usart_callback_t) (uint8_t *buf, int len, void *pxTaskWoken);
/**
Set callback for receiving data.
*/
void usart_set_callback(usart_callback_t callback);
/**
Insert a character to the RX buffer of a usart
@param[in] c character to insert
@param[out] pxTaskWoken can be set, if context switch is required due to received data.
*/
void usart_insert(char c, void *pxTaskWoken);
/**
Polling putchar (stdin).
@param[in] c Character to transmit
*/
void usart_putc(char c);
/**
Send char buffer on UART (stdout).
@param[in] buf Pointer to data
@param[in] len Length of data
*/
void usart_putstr(char *buf, int len);
/**
Buffered getchar (stdin).
@return Character received
*/
char usart_getc(void);
#ifdef __cplusplus
}
#endif
#endif /* USART_H_ */