108 lines
4.2 KiB
Arduino
108 lines
4.2 KiB
Arduino
/*
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Configuring the GNSS to automatically send RXM RZWX reports over I2C and display them using a callback
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By: Paul Clark
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SparkFun Electronics
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Date: March 11th, 2021
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License: MIT. See license file for more information but you can
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basically do whatever you want with this code.
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This example shows how to configure the u-blox GNSS to send RXM RAWX reports automatically
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and access the data via a callback. No more polling!
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Feel like supporting open source hardware?
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Buy a board from SparkFun!
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ZED-F9P RTK2: https://www.sparkfun.com/products/15136
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Hardware Connections:
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Plug a Qwiic cable into the GPS and a BlackBoard
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If you don't have a platform with a Qwiic connection use the SparkFun Qwiic Breadboard Jumper (https://www.sparkfun.com/products/14425)
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Open the serial monitor at 115200 baud to see the output
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*/
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#include <Wire.h> //Needed for I2C to GPS
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#include <SparkFun_u-blox_GNSS_Arduino_Library.h> //http://librarymanager/All#SparkFun_u-blox_GNSS
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SFE_UBLOX_GNSS myGNSS;
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// Callback: newRAWX will be called when new RXM RAWX data arrives
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// See u-blox_structs.h for the full definition of UBX_RXMRAWX_data_t
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// _____ You can use any name you like for the callback. Use the same name when you call setAutoRXMRAWXcallback
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// / _____ This _must_ be UBX_RXM_RAWX_data_t
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// | / _____ You can use any name you like for the struct
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// | | /
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// | | |
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void newRAWX(UBX_RXM_RAWX_data_t *ubxDataStruct)
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{
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Serial.println();
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Serial.print(F("New RAWX data received. It contains "));
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Serial.print(ubxDataStruct->header.numMeas); // Print numMeas (Number of measurements / blocks)
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Serial.println(F(" data blocks:"));
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for (uint8_t block = 0; block < ubxDataStruct->header.numMeas; block++) // For each block
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{
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Serial.print(F("GNSS ID: "));
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if (ubxDataStruct->blocks[block].gnssId < 100) Serial.print(F(" ")); // Align the gnssId
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if (ubxDataStruct->blocks[block].gnssId < 10) Serial.print(F(" ")); // Align the gnssId
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Serial.print(ubxDataStruct->blocks[block].gnssId);
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Serial.print(F(" SV ID: "));
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if (ubxDataStruct->blocks[block].svId < 100) Serial.print(F(" ")); // Align the svId
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if (ubxDataStruct->blocks[block].svId < 10) Serial.print(F(" ")); // Align the svId
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Serial.print(ubxDataStruct->blocks[block].svId);
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if (sizeof(double) == 8) // Check if our processor supports 64-bit double
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{
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// Convert prMes from uint8_t[8] to 64-bit double
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// prMes is little-endian
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double pseudorange;
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memcpy(&pseudorange, &ubxDataStruct->blocks[block].prMes, 8);
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Serial.print(F(" PR: "));
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Serial.print(pseudorange, 3);
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// Convert cpMes from uint8_t[8] to 64-bit double
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// cpMes is little-endian
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double carrierPhase;
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memcpy(&carrierPhase, &ubxDataStruct->blocks[block].cpMes, 8);
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Serial.print(F(" m CP: "));
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Serial.print(carrierPhase, 3);
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Serial.print(F(" cycles"));
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}
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Serial.println();
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}
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}
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void setup()
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{
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Serial.begin(115200);
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while (!Serial); //Wait for user to open terminal
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Serial.println("SparkFun u-blox Example");
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Wire.begin();
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//myGNSS.enableDebugging(); // Uncomment this line to enable helpful debug messages on Serial
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myGNSS.disableUBX7Fcheck(); // RAWX data can legitimately contain 0x7F, so we need to disable the "7F" check in checkUbloxI2C
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if (myGNSS.begin() == false) //Connect to the u-blox module using Wire port
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{
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Serial.println(F("u-blox GNSS not detected at default I2C address. Please check wiring. Freezing."));
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while (1);
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}
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myGNSS.setI2COutput(COM_TYPE_UBX); //Set the I2C port to output UBX only (turn off NMEA noise)
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myGNSS.saveConfigSelective(VAL_CFG_SUBSEC_IOPORT); //Save (only) the communications port settings to flash and BBR
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myGNSS.setNavigationFrequency(1); //Produce one solution per second (RAWX produces a _lot_ of data!)
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myGNSS.setAutoRXMRAWXcallbackPtr(&newRAWX); // Enable automatic RXM RAWX messages with callback to newRAWX
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}
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void loop()
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{
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myGNSS.checkUblox(); // Check for the arrival of new data and process it.
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myGNSS.checkCallbacks(); // Check if any callbacks are waiting to be processed.
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Serial.print(".");
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delay(50);
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}
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