A GPS serial interrupt service routine that has an on the fly nmea parser. Works with a STM32F411RE and a Adafruit GPS logger.
Dependents: Bicycl_Computer_NUCLEO-F411RE Bicycl_Computer_NUCLEO-L476RG
Fork of GPS by
main.cpp
#include "mbed.h" #include "GPSISR.h" #define PIN_RX_GPS PA_12 //GPS Shield RX pin #define PIN_TX_GPS PA_11 //GPS Shield TX pin Serial pc(USBTX, USBRX); // Set up serial interrupe service handler for gps characters. GPS MyGPS(PIN_TX_GPS,PIN_RX_GPS, 9600); int main() { while (1) { if (MyGPS.dataready()) { MyGPS.read(); pc.printf("NMEA has valid data"); pc.printf("Sats : %d \n", MyGPS.buffer.satellites); pc.printf("%d-%d-%d\n", MyGPS.buffer.month, MyGPS.buffer.day, MyGPS.buffer.year); pc.printf("%d:%d:%d\n", MyGPS.buffer.hours, MyGPS.buffer.minutes, MyGPS.buffer.seconds); } else { pc.printf("NMEA has no valid data"); } } }
GPSISR.cpp@1:4b5ffae743c0, 2017-02-10 (annotated)
- Committer:
- trevieze
- Date:
- Fri Feb 10 17:57:45 2017 +0000
- Revision:
- 1:4b5ffae743c0
- Child:
- 2:dbc6c0789611
New interrupt service handler for NMEA library
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
trevieze | 1:4b5ffae743c0 | 1 | /* mbed EM-406 GPS Module Library |
trevieze | 1:4b5ffae743c0 | 2 | * Copyright (c) 2008-2010, sford |
trevieze | 1:4b5ffae743c0 | 3 | * |
trevieze | 1:4b5ffae743c0 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
trevieze | 1:4b5ffae743c0 | 5 | * of this software and associated documentation files (the "Software"), to deal |
trevieze | 1:4b5ffae743c0 | 6 | * in the Software without restriction, including without limitation the rights |
trevieze | 1:4b5ffae743c0 | 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
trevieze | 1:4b5ffae743c0 | 8 | * copies of the Software, and to permit persons to whom the Software is |
trevieze | 1:4b5ffae743c0 | 9 | * furnished to do so, subject to the following conditions: |
trevieze | 1:4b5ffae743c0 | 10 | * |
trevieze | 1:4b5ffae743c0 | 11 | * The above copyright notice and this permission notice shall be included in |
trevieze | 1:4b5ffae743c0 | 12 | * all copies or substantial portions of the Software. |
trevieze | 1:4b5ffae743c0 | 13 | * |
trevieze | 1:4b5ffae743c0 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
trevieze | 1:4b5ffae743c0 | 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
trevieze | 1:4b5ffae743c0 | 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
trevieze | 1:4b5ffae743c0 | 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
trevieze | 1:4b5ffae743c0 | 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
trevieze | 1:4b5ffae743c0 | 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
trevieze | 1:4b5ffae743c0 | 20 | * THE SOFTWARE. |
trevieze | 1:4b5ffae743c0 | 21 | */ |
trevieze | 1:4b5ffae743c0 | 22 | |
trevieze | 1:4b5ffae743c0 | 23 | #include "GPSISR.h" |
trevieze | 1:4b5ffae743c0 | 24 | |
trevieze | 1:4b5ffae743c0 | 25 | GPS::GPS(PinName tx, PinName rx, int Baud) : _gps(tx, rx) { |
trevieze | 1:4b5ffae743c0 | 26 | _gps.baud(Baud); |
trevieze | 1:4b5ffae743c0 | 27 | _gps.attach(this,&GPS::Rx_interrupt, Serial::RxIrq); |
trevieze | 1:4b5ffae743c0 | 28 | printf("Interrupt Attached"); |
trevieze | 1:4b5ffae743c0 | 29 | } |
trevieze | 1:4b5ffae743c0 | 30 | |
trevieze | 1:4b5ffae743c0 | 31 | void GPS::getline() { |
trevieze | 1:4b5ffae743c0 | 32 | while(_gps.getc() != '$'); // wait for the start of a line |
trevieze | 1:4b5ffae743c0 | 33 | for(int i=0; i<256; i++) { |
trevieze | 1:4b5ffae743c0 | 34 | msg[i] = _gps.getc(); |
trevieze | 1:4b5ffae743c0 | 35 | if(msg[i] == '\r') { |
trevieze | 1:4b5ffae743c0 | 36 | msg[i] = 0; |
trevieze | 1:4b5ffae743c0 | 37 | return; |
trevieze | 1:4b5ffae743c0 | 38 | } |
trevieze | 1:4b5ffae743c0 | 39 | } |
trevieze | 1:4b5ffae743c0 | 40 | error("Overflowed message limit"); |
trevieze | 1:4b5ffae743c0 | 41 | return; |
trevieze | 1:4b5ffae743c0 | 42 | } |
trevieze | 1:4b5ffae743c0 | 43 | |
trevieze | 1:4b5ffae743c0 | 44 | // Interupt Routine to read in data from serial port |
trevieze | 1:4b5ffae743c0 | 45 | void GPS::Rx_interrupt(void) { |
trevieze | 1:4b5ffae743c0 | 46 | interrupt = 1; |
trevieze | 1:4b5ffae743c0 | 47 | rx_in = _gps.getc(); |
trevieze | 1:4b5ffae743c0 | 48 | interrupt = 0; |
trevieze | 1:4b5ffae743c0 | 49 | return; |
trevieze | 1:4b5ffae743c0 | 50 | } |