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/*
* The MIT License (MIT)
*
* Copyright (c) 2016 Matthias P. Braendli, Maximilien Cuony
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/* This handles the USART 3 to the GPS receiver, and fills a queue of
* NMEA messages.
*
* It also handles the debug USART 2 and allows sending messages to the PC.
*/
#ifndef __USART_H_
#define __USART_H_
#ifdef STM32F4XX
# include <stm32f4xx_usart.h>
#else
# define USART_TypeDef int
# define USART2 ((USART_TypeDef*)2)
# define USART3 ((USART_TypeDef*)3)
#endif
#define MAX_NMEA_SENTENCE_LEN 256
// Initialise USART2 for PC debugging
void usart_init(void);
// Initialise USART3 for GPS and NMEA queue
// Needs running scheduler
void usart_gps_init(void);
// Send the str to the GPS receiver
void usart_gps_puts(const char* str);
// a printf to send data to the PC
void usart_debug(const char *format, ...);
// Send a string to the PC
void usart_debug_puts(const char* str);
void usart_debug_puts_header(const char* hdr, const char* str);
// Get a MAX_NMEA_SENTENCE_LEN sized NMEA sentence
// Return 1 on success
int usart_get_nmea_sentence(char* nmea);
void usart_debug_timestamp(void);
void usart_gps_specific_init(void);
void usart_process_char(char);
void usart_gps_process_char(char);
void usart_puts(USART_TypeDef*, const char*);
#endif //__USART_H_
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