mirror of https://github.com/ArduPilot/ardupilot
Pozyx: add Arduino Uno sketch
This sketch should be loaded onto an Arduino Uno connected to a Pozyx system as described on the ArduPilot wiki
This commit is contained in:
Shingo Matsuura
Randy Mackay
parent
6d65b351cd
commit
b2a1e0cdce
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#include <Time.h>
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#include <TimeLib.h>
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#include <Pozyx.h>
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#include <Pozyx_definitions.h>
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/*//#include <mavlink.h>*/
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#include "C:\Users\rmackay9\Documents\GitHub\ardupilot\Build.ArduCopter\libraries\GCS_MAVLink\include\mavlink\v2.0\common\mavlink.h"
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#include <SoftwareSerial.h>
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#include <Wire.h>
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/*#include <Time.h> // download from https://github.com/PaulStoffregen/Time */
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//#include "C:\Users\rmackay9\Documents\GitHub\Time\Time.h"
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////////////////// Pozyx Prams //////////////////////////////
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#define NUM_ANCHORS 4
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// the network id of the anchors: change these to the network ids of your anchors.
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uint16_t anchors[4] = { 0x601C, // (0,0)
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0x6020, // x-axis
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0x6057, // y-axis
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0x605E};
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// only required for manual anchor calibration.
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// Please change this to the coordinates measured for the anchors
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int32_t anchors_x[NUM_ANCHORS] = {0, 18600, 0, 18600}; // anchor x-coorindates in mm (horizontal)
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int32_t anchors_y[NUM_ANCHORS] = {0, 0, 10000, 10000}; // anchor y-coordinates in mm (vertical)
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int32_t heights[NUM_ANCHORS] = {1420, 0, 0, 1450}; // anchor z-coordinates in mm
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////////////////// MAVLINK Prams //////////////////////////////
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#define LATITUDE_BASE (36.324187 * 1.0e7)
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#define LONGITUDE_BASE (138.639212 * 1.0e7)
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uint8_t buf[MAVLINK_MSG_ID_GPS_INPUT_LEN];
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int32_t latitude = 0;
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int32_t longitude = 0;
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// RX TX serial for flight controller ex) Pixhawk
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// https://github.com/PaulStoffregen/AltSoftSerial
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SoftwareSerial fcboardSerial(10, 11); // rx, tx
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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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fcboardSerial.begin(57600);
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if (Pozyx.begin() == POZYX_FAILURE) {
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Serial.println(("ERR: shield"));
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delay(100);
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abort();
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}
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Serial.println(("V1.0"));
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// clear all previous devices in the device list
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Pozyx.clearDevices();
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//int status = Pozyx.doAnchorCalibration(POZYX_2_5D, 10, num_anchors, anchors, heights);
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/*int status = Pozyx.doAnchorCalibration(POZYX_2D, 10, num_anchors, anchors, heights);
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if (status != POZYX_SUCCESS) {
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Serial.println(status);
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Serial.println(("ERROR: calibration"));
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Serial.println(("Reset required"));
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delay(100);
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abort();
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}*/
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// if the automatic anchor calibration is unsuccessful, try manually setting the anchor coordinates.
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// fot this, you must update the arrays anchors_x, anchors_y and heights above
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// comment out the doAnchorCalibration block and the if-statement above if you are using manual mode
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SetAnchorsManual();
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printCalibrationResult();
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Serial.println(("Waiting.."));
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delay(5000);
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Serial.println(("Starting: "));
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}
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void loop()
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{
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coordinates_t position;
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int status = Pozyx.doPositioning(&position, POZYX_2_5D, 1000);
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//int status = Pozyx.doPositioning(&position);
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if (status == POZYX_SUCCESS) {
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// print out the result
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printCoordinates(position);
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// send GPS MAVLINK message
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SendGPSMAVLinkMessage(position);
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} else {
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Serial.println("fail");
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}
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}
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// function to print the coordinates to the serial monitor
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void printCoordinates(coordinates_t coor)
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{
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Serial.print("x:");
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Serial.print(coor.x);
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print_tab();
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Serial.print("y:");
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Serial.print(coor.y);
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print_tab();
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Serial.print("z:");
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Serial.print(coor.z);
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print_tab();
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Serial.print("lat:");
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Serial.print(latitude);
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print_tab();
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Serial.print("lng:");
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Serial.print(longitude);
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print_tab();
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Serial.println();
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}
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void print_comma()
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{
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Serial.print(",");
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}
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void print_tab()
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{
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Serial.print("\t");
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}
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#define LOCATION_SCALING_FACTOR_INV_MM 0.08983204953368922f
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#define DEG_TO_RAD (M_PI / 180.0f)
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float longitude_scale(uint32_t lat)
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{
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static int32_t last_lat = 0;
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static float scale = 1.0;
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if (labs(last_lat - lat) < 100000) {
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// we are within 0.01 degrees (about 1km) of the
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// previous latitude. We can avoid the cos() and return
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// the same scale factor.
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return scale;
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}
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scale = cosf(lat * 1.0e-7f * DEG_TO_RAD);
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if (scale < 0.01f) {
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scale = 0.01f;
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}
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if (scale > 1.0f) {
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scale = 1.0f;
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}
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last_lat = lat;
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return scale;
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}
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void location_offset(int32_t &lat, int32_t &lng, int32_t offset_north_mm, int32_t offset_east_mm)
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{
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int32_t dlat = offset_north_mm * LOCATION_SCALING_FACTOR_INV_MM;
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int32_t dlng = (offset_east_mm * LOCATION_SCALING_FACTOR_INV_MM) / longitude_scale(lat);
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lat += dlat;
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lng += dlng;
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}
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// print out the anchor coordinates (also required for the processing sketch)
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void printCalibrationResult()
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{
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uint8_t list_size;
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int status;
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status = Pozyx.getDeviceListSize(&list_size);
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Serial.print("list: ");
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Serial.println(status*list_size);
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if (list_size == 0) {
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Serial.println("Cal fail.");
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Serial.println(Pozyx.getSystemError());
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return;
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}
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uint16_t device_ids[list_size];
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status &= Pozyx.getDeviceIds(device_ids,list_size);
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Serial.println(("Cal:"));
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Serial.print(("Anchors found: "));
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Serial.println(list_size);
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coordinates_t anchor_coor;
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for (int i=0; i<list_size; i++) {
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Serial.print("A0x");
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Serial.print(device_ids[i], HEX);
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print_comma();
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status = Pozyx.getDeviceCoordinates(device_ids[i], &anchor_coor);
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Serial.print(anchor_coor.x);
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print_comma();
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Serial.print(anchor_coor.y);
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print_comma();
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Serial.println(anchor_coor.z);
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}
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}
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// function to manually set the anchor coordinates
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void SetAnchorsManual()
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{
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int i=0;
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for (i=0; i<NUM_ANCHORS; i++) {
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device_coordinates_t anchor;
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anchor.network_id = anchors[i];
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anchor.flag = 0x1;
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anchor.pos.x = anchors_x[i];
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anchor.pos.y = anchors_y[i];
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anchor.pos.z = heights[i];
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Pozyx.addDevice(anchor);
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}
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}
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// GPS MAVLink message using Pozyx potision
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void SendGPSMAVLinkMessage(coordinates_t position)
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{
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// Initialize the required buffers
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mavlink_message_t msg;
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/**
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* @brief Pack a gps_input message
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* @param system_id ID of this system
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* @param component_id ID of this component (e.g. 200 for IMU)
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* @param msg The MAVLink message to compress the data into
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*
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* @param time_usec Timestamp (micros since boot or Unix epoch)
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* @param gps_id ID of the GPS for multiple GPS inputs
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* @param ignore_flags Flags indicating which fields to ignore (see GPS_INPUT_IGNORE_FLAGS enum). All other fields must be provided.
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* @param time_week_ms GPS time (milliseconds from start of GPS week)
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* @param time_week GPS week number
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* @param fix_type 0-1: no fix, 2: 2D fix, 3: 3D fix. 4: 3D with DGPS. 5: 3D with RTK
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* @param lat Latitude (WGS84), in degrees * 1E7
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* @param lon Longitude (WGS84), in degrees * 1E7
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* @param alt Altitude (AMSL, not WGS84), in m (positive for up)
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* @param hdop GPS HDOP horizontal dilution of position in m
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* @param vdop GPS VDOP vertical dilution of position in m
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* @param vn GPS velocity in m/s in NORTH direction in earth-fixed NED frame
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* @param ve GPS velocity in m/s in EAST direction in earth-fixed NED frame
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* @param vd GPS velocity in m/s in DOWN direction in earth-fixed NED frame
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* @param speed_accuracy GPS speed accuracy in m/s
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* @param horiz_accuracy GPS horizontal accuracy in m
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* @param vert_accuracy GPS vertical accuracy in m
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* @param satellites_visible Number of satellites visible.
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* @return length of the message in bytes (excluding serial stream start sign)
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*/
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uint16_t ignore_flags = GPS_INPUT_IGNORE_FLAG_VEL_HORIZ|
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GPS_INPUT_IGNORE_FLAG_VEL_VERT|
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GPS_INPUT_IGNORE_FLAG_SPEED_ACCURACY|
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GPS_INPUT_IGNORE_FLAG_HORIZONTAL_ACCURACY|
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GPS_INPUT_IGNORE_FLAG_VERTICAL_ACCURACY;
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uint32_t time_week_ms = 0;
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uint16_t time_week = 0;
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make_gps_time(time_week_ms, time_week);
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// adjust position
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latitude = LATITUDE_BASE;
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longitude = LONGITUDE_BASE;
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location_offset(latitude, longitude, position.y, position.x);
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uint16_t len = mavlink_msg_gps_input_pack(
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1,
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0,
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&msg,
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micros(), // time_usec,
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0, // gps_id,
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ignore_flags,
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time_week_ms, // time_week_ms,
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time_week, // time_week,
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3, // fix_type,
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latitude, // latitude,
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longitude, // longitude,
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10, // altitude,
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1.0f, // hdop,
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1.0f, // vdop,
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0.0f, // vn
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0.0f, // ve
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0.0f, // vd
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0.0f, // speed_accuracy
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0.0f, // horiz_accuracy
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0.0f, // vert_accuracy,
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14 // satellites_visible
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);
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// Copy the message to send buffer
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len = mavlink_msg_to_send_buffer(buf, &msg);
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// Send message
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fcboardSerial.write(buf, len);
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}
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// calculate GPS time
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// based ardupilot/libraries/AP_GPS/GPS_Backend.cpp
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void make_gps_time(uint32_t &time_week_ms, uint16_t &time_week)
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{
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uint8_t year, mon, day, hour, min, sec;
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uint16_t msec;
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time_t now_time = now();
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year = ::year(now_time);
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mon = ::month(now_time);
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day = ::day(now_time);
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uint32_t v = millis();
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msec = v % 1000; v /= 1000;
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sec = v % 100; v /= 100;
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min = v % 100; v /= 100;
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hour = v % 100; v /= 100;
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int8_t rmon = mon - 2;
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if (0 >= rmon) {
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rmon += 12;
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year -= 1;
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}
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// get time in seconds since unix epoch
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uint32_t ret = (year/4) - 15 + 367*rmon/12 + day;
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ret += year*365 + 10501;
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ret = ret*24 + hour;
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ret = ret*60 + min;
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ret = ret*60 + sec;
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// convert to time since GPS epoch
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ret -= 272764785UL;
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// get GPS week and time
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time_week = ret / (7*86400UL);
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time_week_ms = (ret % (7*86400UL)) * 1000;
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time_week_ms += msec;
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}
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