1 files changed, 78 insertions, 0 deletions
diff --git a/src/common/GPIO/usart.h b/src/common/GPIO/usart.h
new file mode 100644
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--- /dev/null
+++ b/src/common/GPIO/usart.h
@@ -0,0 +1,78 @@
+/*
+ * 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);
+
+// Take GPS out of RESET
+void usart_gps_remove_reset(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_
+