Newer
Older
XV Lidar Controller v1.4.0
Copyright 2014-2016 James LeRoy getSurreal
https://github.com/getSurreal/XV_Lidar_Controller
http://www.getsurreal.com/products/xv-lidar-controller
Contributions by:
Doug Hilton mailto: six.speed (at) yahoo (dot) com
See README for additional information
The F() macro in the Serial statements tells the compiler to keep your strings in PROGMEM
*/
#include "TimerThree.h" // used for ultrasonic PWM motor control
#include "PID.h"
#include "EEPROM.h"
#include "EEPROMAnything.h"
#include "SerialCommand.h"
const int N_ANGLES = 360; // # of angles (0..359)
const int SHOW_ALL_ANGLES = N_ANGLES; // value means 'display all angle data, 0..359'
int motor_pwm_pin; // pin connected to mosfet for motor speed control
double rpm_setpoint; // desired RPM (uses double to be compatible with PID library)
double pwm_max; // max analog value. probably never needs to change from 1023
double pwm_min; // min analog pulse value to spin the motor
int sample_time; // how often to calculate the PID values
boolean motor_enable; // to spin the laser or not. No data when not spinning
boolean raw_data; // to retransmit the seiral data to the USB port
boolean show_dist; // controlled by ShowDist and HideDist commands
boolean show_rpm; // controlled by ShowRPM and HideRPM commands
boolean show_interval; // true = show time interval, once per revolution, at angle=0
boolean show_errors; // Show CRC, signal strength and invalid data errors
boolean aryAngles[N_ANGLES]; // array of angles to display
}
const byte EEPROM_ID = 0x07; // used to validate EEPROM initialized
unsigned long now;
unsigned long motor_check_timer = millis();
unsigned long motor_check_interval = 200;
unsigned int rpm_err_thresh = 10; // 2 seconds (10 * 200ms) to shutdown motor with improper RPM and high voltage
James LeRoy
committed
unsigned long curMillis;
unsigned long lastMillis = millis();
const unsigned char COMMAND = 0xFA; // Start of new packet
const int INDEX_LO = 0xA0; // lowest index value
const int INDEX_HI = 0xF9; // highest index value
const int N_DATA_QUADS = 4; // there are 4 groups of data elements
const int N_ELEMENTS_PER_QUAD = 4; // viz., 0=distance LSB; 1=distance MSB; 2=sig LSB; 3=sig MSB
getSurreal
committed
// Offsets to bytes within 'Packet'
const int OFFSET_TO_START = 0;
const int OFFSET_TO_INDEX = OFFSET_TO_START + 1;
const int OFFSET_TO_SPEED_LSB = OFFSET_TO_INDEX + 1;
const int OFFSET_TO_SPEED_MSB = OFFSET_TO_SPEED_LSB + 1;
const int OFFSET_TO_4_DATA_READINGS = OFFSET_TO_SPEED_MSB + 1;
const int OFFSET_TO_CRC_L = OFFSET_TO_4_DATA_READINGS + (N_DATA_QUADS * N_ELEMENTS_PER_QUAD);
const int OFFSET_TO_CRC_M = OFFSET_TO_CRC_L + 1;
const int PACKET_LENGTH = OFFSET_TO_CRC_M + 1; // length of a complete packet
getSurreal
committed
// Offsets to the (4) elements of each of the (4) data quads
const int OFFSET_DATA_DISTANCE_LSB = 0;
const int OFFSET_DATA_DISTANCE_MSB = OFFSET_DATA_DISTANCE_LSB + 1;
const int OFFSET_DATA_SIGNAL_LSB = OFFSET_DATA_DISTANCE_MSB + 1;
const int OFFSET_DATA_SIGNAL_MSB = OFFSET_DATA_SIGNAL_LSB + 1;
int Packet[PACKET_LENGTH]; // an input packet
int ixPacket = 0; // index into 'Packet' array
const int VALID_PACKET = 0;
const int INVALID_PACKET = VALID_PACKET + 1;
const byte INVALID_DATA_FLAG = (1 << 7); // Mask for byte 1 of each data quad "Invalid data"
getSurreal
committed
getSurreal
committed
/* REF: https://github.com/Xevel/NXV11/wiki
The bit 7 of byte 1 seems to indicate that the distance could not be calculated.
It's interesting to see that when this bit is set, the second byte is always 80, and the values of the first byte seem to be
only 02, 03, 21, 25, 35 or 50... When it's 21, then the whole block is 21 80 XX XX, but for all the other values it's the
data block is YY 80 00 00 maybe it's a code to say what type of error ? (35 is preponderant, 21 seems to be when the beam is
interrupted by the supports of the cover) .
const byte STRENGTH_WARNING_FLAG = (1 << 6); // Mask for byte 1 of each data quat "Strength Warning"
The bit 6 of byte 1 is a warning when the reported strength is greatly inferior to what is expected at this distance.
This may happen when the material has a low reflectance (black material...), or when the dot does not have the expected
size or shape (porous material, transparent fabric, grid, edge of an object...), or maybe when there are parasitic
reflections (glass... ).
const byte BAD_DATA_MASK = (INVALID_DATA_FLAG | STRENGTH_WARNING_FLAG);
const byte eState_Find_COMMAND = 0; // 1st state: find 0xFA (COMMAND) in input stream
const byte eState_Build_Packet = eState_Find_COMMAND + 1; // 2nd state: build the packet
int eState = eState_Find_COMMAND;
PID rpmPID(&motor_rpm, &pwm_val, &xv_config.rpm_setpoint, xv_config.Kp, xv_config.Ki, xv_config.Kd, DIRECT);
uint8_t inByte = 0; // incoming serial byte
uint8_t motor_rph_low_byte = 0;
uint16_t aryDist[N_DATA_QUADS] = {0, 0, 0, 0}; // thre are (4) distances, one for each data quad
// so the maximum distance is 16383 mm (0x3FFF)
uint16_t aryQuality[N_DATA_QUADS] = {0, 0, 0, 0}; // same with 'quality'
uint16_t motor_rph = 0;
getSurreal
committed
uint16_t startingAngle = 0; // the first scan angle (of group of 4, based on 'index'), in degrees (0..359)
SerialCommand sCmd;
boolean ledState = LOW;
#if defined(__AVR_ATmega2560__) // if arduino mega 2560
const int ledPin = LED_BUILTIN;
#elif defined(__AVR_ATmega32U4__) && defined(CORE_TEENSY) // if Teensy 2.0
const int ledPin = 11;
#elif defined(__AVR_ATmega32U4__) // if Leonardo (no LED for Pro Micro)
const int ledPin = 13;
#elif defined(__MK20DX256__) // if Teensy 3.1
const int ledPin = 13;
#elif defined(__MKL26Z64__) // if Teensy LC
const int ledPin = 13;
#endif
James LeRoy
committed
getSurreal
committed
// initialization (before 'loop')
EEPROM_readAnything(0, xv_config);
if ( xv_config.id != EEPROM_ID) { // verify EEPROM values have been initialized
initEEPROM();
pinMode(xv_config.motor_pwm_pin, OUTPUT);
Serial.begin(115200); // USB serial
#if defined(__AVR_ATmega2560__) // if arduino mega 2560
Serial1.begin(115200); // XV LDS data
#elif defined(__AVR_ATmega32U4__)
Serial1.begin(115200); // XV LDS data
#elif defined(__MK20DX256__) // if Teensy 3.1
Serial1.begin(115200); // XV LDS data
#elif defined(__MKL26Z64__) // if Teensy LC
Serial1.begin(115200); // XV LDS data
#endif
Timer3.initialize(30); // set PWM frequency to 32.768kHz
rpmPID.SetOutputLimits(xv_config.pwm_min, xv_config.pwm_max);
rpmPID.SetSampleTime(xv_config.sample_time);
rpmPID.SetTunings(xv_config.Kp, xv_config.Ki, xv_config.Kd);
rpmPID.SetMode(AUTOMATIC);
James LeRoy
committed
pinMode(ledPin, OUTPUT);
eState = eState_Find_COMMAND;
for (ixPacket = 0; ixPacket < PACKET_LENGTH; ixPacket++) // Initialize
getSurreal
committed
Packet[ixPacket] = 0;
void loop() {
byte aryInvalidDataFlag[N_DATA_QUADS] = {0, 0, 0, 0}; // non-zero = INVALID_DATA_FLAG or STRENGTH_WARNING_FLAG is set
sCmd.readSerial(); // check for incoming serial commands
if (Serial1.available() > 0) { // read byte from LIDAR and relay to USB
inByte = Serial1.read(); // get incoming byte:
if (xv_config.raw_data)
Serial.write(inByte); // relay
getSurreal
committed
// Switch, based on 'eState':
// State 1: We're scanning for 0xFA (COMMAND) in the input stream
// State 2: Build a complete data packet
if (eState == eState_Find_COMMAND) { // flush input until we get COMMAND byte
if (inByte == COMMAND) {
eState++; // switch to 'build a packet' state
Packet[ixPacket++] = inByte; // store 1st byte of data into 'Packet'
getSurreal
committed
}
else { // eState == eState_Build_Packet
Packet[ixPacket++] = inByte; // keep storing input into 'Packet'
if (ixPacket == PACKET_LENGTH) { // we've got all the input bytes, so we're done building this packet
if (eValidatePacket() == VALID_PACKET) { // Check packet CRC
startingAngle = processIndex(); // get the starting angle of this group (of 4), e.g., 0, 4, 8, 12, ...
processSpeed(); // process the speed
// process each of the (4) sets of data in the packet
for (int ix = 0; ix < N_DATA_QUADS; ix++) // process the distance
aryInvalidDataFlag[ix] = processDistance(ix);
for (int ix = 0; ix < N_DATA_QUADS; ix++) { // process the signal strength (quality)
aryQuality[ix] = 0;
processSignalStrength(ix);
}
if (xv_config.show_dist) { // the 'ShowDistance' command is active
for (int ix = 0; ix < N_DATA_QUADS; ix++) {
if (xv_config.aryAngles[startingAngle + ix]) { // if we're supposed to display that angle
if (aryInvalidDataFlag[ix] & BAD_DATA_MASK) { // if LIDAR reported a data error...
if (xv_config.show_errors) { // if we're supposed to show data errors...
Serial.print(F("A,"));
Serial.print(startingAngle + ix);
Serial.print(F(","));
if (aryInvalidDataFlag[ix] & INVALID_DATA_FLAG)
Serial.println(F("I"));
if (aryInvalidDataFlag[ix] & STRENGTH_WARNING_FLAG)
Serial.println(F("S"));
}
}
else { // show clean data
Serial.print(F("A,"));
Serial.print(startingAngle + ix);
Serial.print(F(","));
Serial.print(int(aryDist[ix]));
Serial.print(F(","));
Serial.println(aryQuality[ix]);
}
} // if (xv_config.aryAngles[startingAngle + ix])
} // for (int ix = 0; ix < N_DATA_QUADS; ix++)
} // if (xv_config.show_dist)
else if (xv_config.show_errors) { // we have encountered a CRC error
Serial.println(F("C,CRC"));
}
// initialize a bunch of stuff before we switch back to State 1
for (int ix = 0; ix < N_DATA_QUADS; ix++) {
aryDist[ix] = 0;
aryQuality[ix] = 0;
aryInvalidDataFlag[ix] = 0;
}
for (ixPacket = 0; ixPacket < PACKET_LENGTH; ixPacket++) // clear out this packet
ixPacket = 0;
eState = eState_Find_COMMAND; // This packet is done -- look for next COMMAND byte
} // if (ixPacket == PACKET_LENGTH)
} // if (eState == eState_Find_COMMAND)
getSurreal
committed
} // if (Serial1.available() > 0)
if (pwm_val != pwm_last) {
Timer3.pwm(xv_config.motor_pwm_pin, pwm_val); // replacement for analogWrite()
pwm_last = pwm_val;
}
getSurreal
committed
} // loop
/*
processIndex - Process the packet element 'index'
index is the index byte in the 90 packets, going from A0 (packet 0, readings 0 to 3) to F9
(packet 89, readings 356 to 359).
Enter with: N/A
Uses: Packet
ledState gets toggled if angle = 0
ledPin = which pin the LED is connected to
ledState = LED on or off
xv_config.show_dist = true if we're supposed to show distance
curMillis = milliseconds, now
lastMillis = milliseconds, last time through this subroutine
xv_config.show_interval = true ==> display time interval once per revolution, at angle 0
Calls: digitalWrite() - used to toggle LED pin
Serial.print
Returns: The first angle (of 4) in the current 'index' group
*/
uint16_t processIndex() {
getSurreal
committed
uint16_t angle = 0;
uint16_t data_4deg_index = Packet[OFFSET_TO_INDEX] - INDEX_LO;
angle = data_4deg_index * N_DATA_QUADS; // 1st angle in the set of 4
if (angle == 0) {
if (ledState) {
ledState = LOW;
else {
ledState = HIGH;
}
digitalWrite(ledPin, ledState);
if (xv_config.show_rpm) {
Serial.print(F("R,"));
Serial.print((int)motor_rpm);
Serial.print(F(","));
Serial.println((int)pwm_val);
}
curMillis = millis();
if (xv_config.show_interval) {
Serial.print(F("T,")); // Time Interval in ms since last complete revolution
Serial.println(curMillis - lastMillis);
}
lastMillis = curMillis;
} // if (angle == 0)
getSurreal
committed
return angle;
}
/*
processSpeed- Process the packet element 'speed'
speed is two-bytes of information, little-endian. It represents the speed, in 64th of RPM (aka value
in RPM represented in fixed point, with 6 bits used for the decimal part).
Enter with: N/A
Uses: Packet
angle = if 0 then enable display of RPM and PWM
xv_config.show_rpm = true if we're supposed to display RPM and PWM
Calls: Serial.print
*/
void processSpeed() {
motor_rph_low_byte = Packet[OFFSET_TO_SPEED_LSB];
motor_rph_high_byte = Packet[OFFSET_TO_SPEED_MSB];
motor_rph = (motor_rph_high_byte << 8) | motor_rph_low_byte;
motor_rpm = float( (motor_rph_high_byte << 8) | motor_rph_low_byte ) / 64.0;
getSurreal
committed
}
/*
Data 0 to Data 3 are the 4 readings. Each one is 4 bytes long, and organized as follows :
byte 0 : <distance 7:0>
byte 1 : <"invalid data" flag> <"strength warning" flag> <distance 13:8>
byte 2 : <signal strength 7:0>
byte 3 : <signal strength 15:8>
*/
getSurreal
committed
/*
processDistance- Process the packet element 'distance'
Enter with: iQuad = which one of the (4) readings to process, value = 0..3
Uses: Packet
dist[] = sets distance to object in binary: ISbb bbbb bbbb bbbb
so maximum distance is 0x3FFF (16383 decimal) millimeters (mm)
Calls: N/A
Exits with: 0 = okay
Error: 1 << 7 = INVALID_DATA_FLAG is set
1 << 6 = STRENGTH_WARNING_FLAG is set
*/
byte processDistance(int iQuad) {
getSurreal
committed
uint8_t dataL, dataM;
aryDist[iQuad] = 0; // initialize
int iOffset = OFFSET_TO_4_DATA_READINGS + (iQuad * N_DATA_QUADS) + OFFSET_DATA_DISTANCE_LSB;
// byte 0 : <distance 7:0> (LSB)
// byte 1 : <"invalid data" flag> <"strength warning" flag> <distance 13:8> (MSB)
dataM = Packet[iOffset + 1]; // get MSB of distance data + flags
if (dataM & BAD_DATA_MASK) // if either INVALID_DATA_FLAG or STRENGTH_WARNING_FLAG is set...
return dataM & BAD_DATA_MASK; // ...then return non-zero
dataL = Packet[iOffset]; // LSB of distance data
aryDist[iQuad] = dataL | ((dataM & 0x3F) << 8);
return 0; // okay
getSurreal
committed
}
/*
processSignalStrength- Process the packet element 'signal strength'
Enter with: iQuad = which one of the (4) readings to process, value = 0..3
Uses: Packet
quality[] = signal quality
Calls: N/A
*/
void processSignalStrength(int iQuad) {
getSurreal
committed
uint8_t dataL, dataM;
aryQuality[iQuad] = 0; // initialize
int iOffset = OFFSET_TO_4_DATA_READINGS + (iQuad * N_DATA_QUADS) + OFFSET_DATA_SIGNAL_LSB;
dataL = Packet[iOffset]; // signal strength LSB
dataM = Packet[iOffset + 1];
aryQuality[iQuad] = dataL | (dataM << 8);
getSurreal
committed
}
getSurreal
committed
/*
eValidatePacket - Validate 'Packet'
Enter with: 'Packet' is ready to check
Uses: CalcCRC
Exits with: 0 = Packet is okay
Error: non-zero = Packet is no good
*/
getSurreal
committed
byte eValidatePacket() {
unsigned long chk32;
unsigned long checksum;
const int bytesToCheck = PACKET_LENGTH - 2;
getSurreal
committed
const int CalcCRC_Len = bytesToCheck / 2;
unsigned int CalcCRC[CalcCRC_Len];
byte b1a, b1b, b2a, b2b;
int ix;
for (int ix = 0; ix < CalcCRC_Len; ix++) // initialize 'CalcCRC' array
CalcCRC[ix] = 0;
getSurreal
committed
// Perform checksum validity test
for (ix = 0; ix < bytesToCheck; ix += 2) // build 'CalcCRC' array
CalcCRC[ix / 2] = Packet[ix] + ((Packet[ix + 1]) << 8);
getSurreal
committed
chk32 = 0;
for (ix = 0; ix < CalcCRC_Len; ix++)
chk32 = (chk32 << 1) + CalcCRC[ix];
getSurreal
committed
checksum = (chk32 & 0x7FFF) + (chk32 >> 15);
checksum &= 0x7FFF;
b1a = checksum & 0xFF;
getSurreal
committed
b2a = checksum >> 8;
b2b = Packet[OFFSET_TO_CRC_M];
if ((b1a == b1b) && (b2a == b2b))
return VALID_PACKET; // okay
getSurreal
committed
else
return INVALID_PACKET; // non-zero = bad CRC
getSurreal
committed
/*
xv_config.id = 0x07;
#if defined(__AVR_ATmega2560__) // if arduino mega 2560
xv_config.motor_pwm_pin = 5; // pin connected N-Channel Mosfet
#elif defined(__AVR_ATmega32U4__) && defined(CORE_TEENSY) // if Teensy 2.0
xv_config.motor_pwm_pin = 9; // pin connected N-Channel Mosfet
#elif defined(__AVR_ATmega32U4__) // if Leonardo or Pro Micro
xv_config.motor_pwm_pin = 5; // pin connected N-Channel Mosfet
#elif defined(__MK20DX256__) // if Teensy 3.1
xv_config.motor_pwm_pin = 33; // pin connected N-Channel Mosfet
#elif defined(__MKL26Z64__) // if Teensy LC
xv_config.motor_pwm_pin = 4; // pin connected N-Channel Mosfet
#endif
xv_config.rpm_setpoint = 200; // desired RPM
xv_config.rpm_min = 200;
xv_config.rpm_max = 300;
xv_config.pwm_min = 100;
xv_config.pwm_max = 1023;
xv_config.sample_time = 20;
xv_config.Kp = 2.0;
xv_config.Ki = 1.0;
xv_config.Kd = 0.0;
xv_config.motor_enable = true;
xv_config.raw_data = true;
xv_config.show_dist = false;
xv_config.show_rpm = false;
xv_config.show_interval = false;
xv_config.show_errors = false;
for (int ix = 0; ix < N_ANGLES; ix++)
xv_config.aryAngles[ix] = true;
EEPROM_writeAnything(0, xv_config);
getSurreal
committed
/*
sCmd.addCommand("help", help);
sCmd.addCommand("Help", help);
sCmd.addCommand("ShowConfig", showConfig);
sCmd.addCommand("SaveConfig", saveConfig);
sCmd.addCommand("ResetConfig", initEEPROM);
sCmd.addCommand("SetAngle", setAngle);
sCmd.addCommand("SetRPM", setRPM);
sCmd.addCommand("SetKp", setKp);
sCmd.addCommand("SetKi", setKi);
sCmd.addCommand("SetKd", setKd);
sCmd.addCommand("SetSampleTime", setSampleTime);
sCmd.addCommand("MotorOff", motorOff);
sCmd.addCommand("MotorOn", motorOn);
getSurreal
committed
sCmd.addCommand("ShowRaw", showRaw);
sCmd.addCommand("HideRaw", hideRaw);
sCmd.addCommand("ShowDist", showDist);
sCmd.addCommand("HideDist", hideDist);
sCmd.addCommand("ShowRPM", showRPM);
sCmd.addCommand("HideRPM", hideRPM);
getSurreal
committed
sCmd.addCommand("ShowErrors", showErrors);
sCmd.addCommand("HideErrors", hideErrors);
sCmd.addCommand("ShowInterval", showInterval);
sCmd.addCommand("HideInterval", hideInterval);
sCmd.addCommand("ShowAll", showAll);
sCmd.addCommand("HideAll", hideAll);
}
/*
showAll - Show Dist, Errors, RPM, and Interval data
*/
showDist();
showErrors();
showRPM();
showInterval();
hideAll - Hide Dist, Errors, RPM, and Interval data
*/
hideDist();
hideErrors();
hideRPM();
hideInterval();
getSurreal
committed
/*
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
showInterval - enable display of Time interval (which happens once per revolution, at angle 0
*/
void showInterval() {
xv_config.show_interval = true;
if (xv_config.show_dist == false) { // suppress activity message if we're executing 'show distance'
Serial.println(F(" "));
Serial.println(F("Showing time interval (ms per revolution)"));
}
}
/*
hideInterval - suppress display of Time interval
*/
void hideInterval() {
xv_config.show_interval = false;
if (xv_config.show_dist == false) { // suppress activity message if we're executing 'show distance'
Serial.println(F(" "));
Serial.println(F("Hiding time interval"));
}
}
/*
showErrors
*/
void showErrors() {
xv_config.show_errors = true; // enable error display
if (xv_config.show_dist == false) { // suppress activity message if we're executing 'show distance'
Serial.println(F(" "));
Serial.println(F("Showing errors"));
}
}
/*
hideErrors
*/
void hideErrors() { // disable error display
xv_config.show_errors = false;
if (xv_config.show_dist == false) { // suppress activity message if we're executing 'show distance'
Serial.println(F(" "));
Serial.println(F("Hiding errors"));
}
}
/*
showRPM
*/
void showRPM() {
xv_config.show_rpm = true;
if (xv_config.raw_data == true) {
hideRaw();
}
if (xv_config.show_dist == false) { // suppress activity message if we're executing 'show distance'
Serial.println(F(" "));
Serial.println(F("Showing RPM data"));
}
}
/*
hideRPM
*/
void hideRPM() {
xv_config.show_rpm = false;
if (xv_config.show_dist == false) { // suppress activity message if we're executing 'show distance'
Serial.println(F(" "));
Serial.println(F("Hiding RPM data"));
}
}
void showDist() {
hideRaw();
if (xv_config.show_dist == false) { // suppress activity message if we're executing 'show distance'
Serial.println(F(" "));
Serial.println(F("Code,Angle,Distance(mm),Signal strength"));
}
xv_config.show_dist = true;
}
void hideDist() {
xv_config.show_dist = false;
if (xv_config.show_dist == false) { // suppress activity message if we're executing 'show distance'
James LeRoy
committed
Serial.println(F(" "));
Serial.println(F("Hiding Distance data"));
getSurreal
committed
/*
doSetAngle - Multi-angle range(s) implementation - DSH
Command: SetAngles ddd, ddd-ddd, etc.
Enter with: N/A
Uses: xv_config.aryAngles (an array of 360 booleans) is set to appropriate values
Calls: showDist
Exits with: N/A
TEST THIS STRING: SetAngles 16-20, 300-305, 123-124, 10
*/
void setAngle() {
getSurreal
committed
char c, *arg;
getSurreal
committed
int doing_from_to, from, to, ix, lToken, n_groups = 0;
for (ix = 0; ix < N_ANGLES; ix++) // initialize
xv_config.aryAngles[ix] = false;
doing_from_to = 0; // state = doing 'from'
// Make sure that there is at least 1 angle or group of angles present
getSurreal
committed
do {
arg = sCmd.next(); // get the next token
if (arg == NULL) { // it's empty -- just exit
getSurreal
committed
sCmd.readSerial();
arg = sCmd.next();
break;
}
// see if the token has an embedded "-", meaning from - to
lToken = strlen(arg); // get the length of the current token
getSurreal
committed
for (ix = 0; ix < lToken; ix++) {
c = arg[ix];
if (c == ',') { // optional trailing comma
getSurreal
committed
doing_from_to = 0;
break;
}
else if (c == '-') { // optional '-' means "from - to"
to = 0;
doing_from_to = 1; // from now on, we're doing 'to'
}
else if (c == ' ') { // ignore blanks
Serial.println(F("{ }"));
}
getSurreal
committed
else if ((c >= '0') && (c <= '9')) {
if (doing_from_to == 0) {
from *= 10;
from += c - '0';
to = from; // default to = from
n_groups++; // count the number of active groups (s/b >= 1)
}
else {
to *= 10;
to += c - '0';
}
}
else {
syntax_error = true;
n_groups = 0;
break;
}
} // for (ix = 0; ix < lToken; ix++)
// validate 'from' and 'to' and set 'xv_config.aryAngles' with correct values
if ((from >= 0) && (from < N_ANGLES) && (to >= 0) && (to < N_ANGLES)) {
getSurreal
committed
if (to >= from) {
for (ix = from; ix <= to; ix++) {
getSurreal
committed
xv_config.aryAngles[ix] = true;
getSurreal
committed
}
}
else {
getSurreal
committed
break;
}
}
else {
syntax_error = true;
break;
getSurreal
committed
from = 0;
to = 0;
getSurreal
committed
} // do
while (arg != NULL);
if (n_groups == 0)
syntax_error = true;
getSurreal
committed
// Handle syntax errors
if (syntax_error) {
getSurreal
committed
Serial.println(F(" "));
Serial.println(F("Incorrect syntax"));
Serial.println(F(" Example: SetAngle 0, 15-30, 45-50, 10"));
Serial.println(F(" Example: SetAngle 0-359 to show all angles."));
Serial.println(F("Notes: Use a space after each comma"));
Serial.println(F(" No particular order is required"));
Serial.println(F(" In a from-to pair, the 1st value must be lowest. From-to pairs can overlap ranges."));
}
else { // no errors detected, display the angles and start
// We're ready to process multiple angles
Serial.println(F(""));
getSurreal
committed
Serial.print(F("Angles:"));
for (int ix = 0; ix < N_ANGLES; ix++) { // display the angle array
if (xv_config.aryAngles[ix]) {
Serial.print(ix, DEC);
Serial.print(F(","));
}
getSurreal
committed
}
Serial.println(F(""));
showDist();
} // if not (syntax_error)
void motorOff() {
xv_config.motor_enable = false;
Timer3.pwm(xv_config.motor_pwm_pin, 0);
Serial.println(F(" "));
Serial.println(F("Motor off"));
getSurreal
committed
void motorOn() {
xv_config.motor_enable = true;
Timer3.pwm(xv_config.motor_pwm_pin, pwm_val);
rpm_err = 0; // reset rpm error
Serial.println(F(" "));
Serial.println(F("Motor on"));
getSurreal
committed
}
void motorCheck() { // Make sure the motor RPMs are good else shut it down
if (now - motor_check_timer > motor_check_interval) {
if ((motor_rpm < xv_config.rpm_min or motor_rpm > xv_config.rpm_max) and pwm_val > 1000) {
rpm_err++;
}
else {
rpm_err = 0;
}
if (rpm_err > rpm_err_thresh) {
ledState = LOW;
digitalWrite(ledPin, ledState);
}
motor_check_timer = millis();
}
}
void hideRaw() {
xv_config.raw_data = false;
//Serial.println(F(" "));
//Serial.println(F("Raw lidar data disabled"));
void showRaw() {
xv_config.raw_data = true;
hideDist();
hideRPM();
//Serial.println(F(" "));
//Serial.println(F("Lidar data enabled"));
}
char *arg;
boolean syntax_error = false;
arg = sCmd.next();
if (arg != NULL) {
sVal = atof(arg); // Converts a char string to a float
if (sVal < xv_config.rpm_min) {
sVal = xv_config.rpm_min;
Serial.println(F(" "));
Serial.print(F("RPM too low. Setting to minimum "));
Serial.println(xv_config.rpm_min);
}
if (sVal > xv_config.rpm_max) {
sVal = xv_config.rpm_max;
Serial.println(F(" "));
Serial.print(F("RPM too high. Setting to maximum "));
Serial.println(xv_config.rpm_max);
}
else {
syntax_error = true;
}
arg = sCmd.next();
if (arg != NULL) {
syntax_error = true;
}
if (syntax_error) {
Serial.println(F(" "));
Serial.println(F("Incorrect syntax. Example: SetRPM 200"));
Serial.print(F("Old RPM setpoint:"));
Serial.println(xv_config.rpm_setpoint);
//Serial.println(F(" "));
Serial.print(F("New RPM setpoint: "));
Serial.println(sVal);
char *arg;
boolean syntax_error = false;
arg = sCmd.next();
if (arg != NULL) {
sVal = atof(arg); // Converts a char string to a float
}
else {
syntax_error = true;
}
arg = sCmd.next();
if (arg != NULL) {
syntax_error = true;
}
if (syntax_error) {
Serial.println(F(" "));
Serial.println(F("Incorrect syntax. Example: SetKp 1.0"));
Serial.println(F(" "));
Serial.print(F("Setting Kp to: "));
Serial.println(sVal);
xv_config.Kp = sVal;
rpmPID.SetTunings(xv_config.Kp, xv_config.Ki, xv_config.Kd);
char *arg;
boolean syntax_error = false;
arg = sCmd.next();
if (arg != NULL) {
sVal = atof(arg); // Converts a char string to a float
}
else {
syntax_error = true;
}
arg = sCmd.next();
if (arg != NULL) {
syntax_error = true;
}
if (syntax_error) {
Serial.println(F(" "));
Serial.println(F("Incorrect syntax. Example: SetKi 0.5"));
Serial.println(F(" "));
Serial.print(F("Setting Ki to: "));
Serial.println(sVal);
xv_config.Ki = sVal;
rpmPID.SetTunings(xv_config.Kp, xv_config.Ki, xv_config.Kd);
char *arg;
boolean syntax_error = false;
arg = sCmd.next();
if (arg != NULL) {
sVal = atof(arg); // Converts a char string to a float
}
else {
syntax_error = true;
}
arg = sCmd.next();
if (arg != NULL) {
syntax_error = true;
}
if (syntax_error) {
Serial.println(F(" "));
Serial.println(F("Incorrect syntax. Example: SetKd 0.001"));
Serial.println(F(" "));
Serial.print(F("Setting Kd to: "));
Serial.println(sVal);
xv_config.Kd = sVal;
rpmPID.SetTunings(xv_config.Kp, xv_config.Ki, xv_config.Kd);
void setSampleTime() {
double sVal = 0.0;
char *arg;
boolean syntax_error = false;
arg = sCmd.next();
if (arg != NULL) {
sVal = atoi(arg); // Converts a char string to an integer
}
else {
syntax_error = true;
}
arg = sCmd.next();
if (arg != NULL) {
syntax_error = true;
}
if (syntax_error) {
Serial.println(F(" "));
Serial.println(F("Incorrect syntax. Example: SetSampleTime 20"));
}
else {
Serial.println(F(" "));
Serial.print(F("Setting Sample time to: "));
Serial.println(sVal);
xv_config.sample_time = sVal;
rpmPID.SetSampleTime(xv_config.sample_time);
}
}
James LeRoy
committed
Serial.println(F(" "));
Serial.println(F(" "));
Serial.print(F("XV Lidar Controller Firmware Version "));
Serial.println(xv_config.version);
Serial.print(F("GetSurreal.com *"));
James LeRoy
committed
Serial.println(F(" "));
Serial.println(F(" "));
Serial.println(F("List of available commands"));
getSurreal
committed
Serial.println(F(" "));
James LeRoy
committed
Serial.println(F(" ShowConfig - Show the running configuration"));
Serial.println(F(" SaveConfig - Save the running configuration to EEPROM"));
Serial.println(F(" ResetConfig - Restore the original configuration"));
Serial.println(F(" SetAngle - Show distance data for a multiple angles (Ex: SetAngle 0, 15-30, 45-50, 10)"));
Serial.println(F(" SetRPM - Set the desired rotation speed (min: 180, max: 349)"));
Serial.println(F(" MotorOff - Stop spinning the lidar"));
Serial.println(F(" MotorOn - Enable spinning of the lidar"));
Serial.println(F(" "));
Serial.println(F("Data commands"));
Serial.println(F(" ShowRaw - Enable the output of the raw lidar data (default)"));
Serial.println(F(" HideRaw - Stop outputting the raw data from the lidar"));
Serial.println(F(" ShowDist - Show angles with distance data"));
Serial.println(F(" HideDist - Hide the distance data"));
Serial.println(F(" ShowErrors - Show all error types (CRC, Signal Strength, and Invalid"));
Serial.println(F(" HideErrors - Hide angles with errors"));
Serial.println(F(" ShowRPM - Show the rotation speed"));
Serial.println(F(" HideRPM - Hide the rotation speed"));
Serial.println(F(" ShowInterval - Show time interval per revolution in ms, at angle=0"));
Serial.println(F(" HideInterval - Hide time interval"));
Serial.println(F(" ShowAll - Show the distance, errors, RPMs and interval data"));
Serial.println(F(" HideAll - Hide the distance, errors, RPMs and interval data"));
Serial.println(F(" "));
Serial.println(F("PID commands"));
James LeRoy
committed
Serial.println(F(" SetKp - Set the proportional gain"));
Serial.println(F(" SetKi - Set the integral gain"));
Serial.println(F(" SetKd - Set the derivative gain"));
Serial.println(F(" SetSampleTime - Set the frequency the PID is calculated (ms)"));
James LeRoy
committed
Serial.println(F(" "));
Serial.println(F("Output comma-separated format:"));
Serial.println(F(" A,<Angle>,<Distance in mm>,<Strength>"));
Serial.println(F(" C,CRC error was generated by LIDAR"));
Serial.println(F(" R,<RPMs>,<PWM value>"));
Serial.println(F(" T,<Time interval in milliseconds>"));
Serial.println(F(" "));
Serial.println(F("Errors:"));
Serial.println(F(" CRC = CRC Error"));
Serial.println(F(" I = LIDAR reports Invalid data for this angle"));
Serial.println(F(" S = LIDAR reports Poor signal strength for this angle"));
James LeRoy
committed
Serial.println(F(" "));
void showConfig() {
getSurreal
committed
}
James LeRoy
committed
Serial.println(F(" "));
getSurreal
committed
Serial.print(F("XV Lidar Controller Firmware Version "));
Serial.println(xv_config.version);
Serial.print(F("GetSurreal.com"));
Serial.println(F(" "));
James LeRoy
committed
Serial.println(F(" "));
Serial.print(F("PWM pin: "));
Serial.println(xv_config.motor_pwm_pin);
James LeRoy
committed
Serial.print(F("Target RPM: "));
Serial.println(xv_config.rpm_setpoint);
getSurreal
committed
Serial.print(F("Max PWM: "));
Serial.println(xv_config.pwm_max);
Serial.print(F("Min PWM: "));
Serial.println(xv_config.pwm_min);
James LeRoy
committed
Serial.print(F("PID Kp: "));
Serial.println(xv_config.Kp);
James LeRoy
committed
Serial.print(F("PID Ki: "));
Serial.println(xv_config.Ki);
James LeRoy
committed
Serial.print(F("PID Kd: "));
Serial.println(xv_config.Kd);