Added Teensy support.

[0Hogan]

Added support for the Teensy LC/3.0/3.1/3.2/3.5/3.6/4.0/4.1

I only had the opportunity to test with a FlySky receiver and a Teensy 4.1. If others could test on some of the other boards and/or other receivers, that would be ideal.

Hopefully this helps with #25 .

[starlight-traveler]

Hey, I was just wondering how you got around this error:

src/main.cpp: In function 'void setup()':
src/main.cpp:29:13: error: no matching function for call to 'IBusBM::begin(HardwareSerialIMXRT&)'
29 | ibus.begin(Serial1);
| ~~~~~~~~~~^~~~~~~~~
In file included from src/main.cpp:2:
.pio/libdeps/teensy41/IBusBM/src/IBusBM.h:61:10: note: candidate: 'void IBusBM::begin(HardwareSerial&, IntervalTimer*, int8_t, int8_t)'
61 | void begin(HardwareSerial &serial, IntervalTimer* timerid, int8_t rxPin=-1, int8_t txPin=-1);
| ^~~~~
.pio/libdeps/teensy41/IBusBM/src/IBusBM.h:61:10: note: candidate expects 4 arguments, 1 provided
*** [.pio/build/teensy41/src/main.cpp.o] Error 1

When I create a timer object and pass it by reference I still run into an issue with the arguments.

[Casseman]

@0Hogan i am trying to get this to work with the teensy 4.0 but i cant. Could you show an example of how you did an test code?

[Casseman]

Hey, I was just wondering how you got around this error:

src/main.cpp: In function 'void setup()':
src/main.cpp:29:13: error: no matching function for call to 'IBusBM::begin(HardwareSerialIMXRT&)'
29 | ibus.begin(Serial1);
| ~~~~~~~~~~^~~~~~~~~
In file included from src/main.cpp:2:
.pio/libdeps/teensy41/IBusBM/src/IBusBM.h:61:10: note: candidate: 'void IBusBM::begin(HardwareSerial&, IntervalTimer*, int8_t, int8_t)'
61 | void begin(HardwareSerial &serial, IntervalTimer* timerid, int8_t rxPin=-1, int8_t txPin=-1);
| ^~~~~
.pio/libdeps/teensy41/IBusBM/src/IBusBM.h:61:10: note: candidate expects 4 arguments, 1 provided
*** [.pio/build/teensy41/src/main.cpp.o] Error 1

When I create a timer object and pass it by reference I still run into an issue with the arguments.

@starlight-traveler what worked for me is doing adding IBus.begin(Serial2,1); instead of IBus.begin(Serial2);. This is on teensy 4.0, hope this helps :)

[SimonSchw]

Hi! Sadly this branch does not work for me out of the box as well.
Temp\.arduinoIDE-unsaved2025223-3936-12rq769.m5l5\sketch_mar23a\sketch_mar23a.ino:10:27: warning: invalid conversion from 'int' to 'IntervalTimer*' [-fpermissive] 10 | IBusServo.begin(Serial1,1); | ^ | | | int In file included from C:\Users\schwi\AppData\Local\Temp\.arduinoIDE-unsaved2025223-3936-12rq769.m5l5\sketch_mar23a\sketch_mar23a.ino:1: c:\dev\ArduFoilControl\libraries\IBusBM\src/IBusBM.h:61:55: note: initializing argument 2 of 'void IBusBM::begin(HardwareSerial&, IntervalTimer*, int8_t, int8_t)' 61 | void begin(HardwareSerial &serial, IntervalTimer* timerid, int8_t rxPin=-1, int8_t txPin=-1);

I tried your solution @Casseman on a teensy4.1 but without luck.

any help would be appreciated!

[starlight-traveler]

This code worked on a Teensy 4.1, I can't remember if I modified the library at all, so if this doesn't work let me know and I can attempt to reflash it:

/*
 Arduino FS-I6X
*/

// Include iBusBM Library
#include <IBusBM.h>
#include "IntervalTimer.h"

// Create iBus Object
IBusBM ibus;

IntervalTimer myTimer;

// Read the number of a given channel and convert to the range provided.
// If the channel is off, return the default value
int readChannel(byte channelInput, int minLimit, int maxLimit, int defaultValue) {
  uint16_t ch = ibus.readChannel(channelInput);
  if (ch < 100) return defaultValue;
  return map(ch, 1000, 2000, minLimit, maxLimit);
}

// Read the channel and return a boolean value
bool readSwitch(byte channelInput, bool defaultValue) {
  int intDefaultValue = (defaultValue) ? 100 : 0;
  int ch = readChannel(channelInput, 0, 100, intDefaultValue);
  return (ch > 50);
}

void setup() {
  // Start serial monitor
  Serial.begin(115200);

  // Attach iBus object to serial port
ibus.begin(Serial1, &myTimer, -1, -1);
}

void loop() {
  // Cycle through first 5 channels and determine values
  // Print values to serial monitor
  // Note IBusBM library labels channels starting with "0"
  for (byte i = 0; i < 5; i++) {
    int value = readChannel(i, -100, 100, 0);
    Serial.print("Ch");
    Serial.print(i + 1);
    Serial.print(": ");
    Serial.print(value);
    Serial.print(" | ");
  }

  // Print channel 6 (switch) boolean value
  Serial.print("Ch6: ");
  Serial.print(readSwitch(5, false));
  Serial.println();

  delay(10);
}

@SimonSchw

[SimonSchw]

This code worked on a Teensy 4.1, I can't remember if I modified the library at all, so if this doesn't ...

Thank you very much @starlight-traveler, works perfectly with the IntervalTimer and -1,-1.
Now I will try to get the telemetry channels to work too.
EDIT: telemetry channel works the same, just added another timer, no further problems.

Thanks again!

[pierrotm777]

You will find an adapted version for Teensy 4.0 4.1 here.
https://forum.pjrc.com/index.php?threads/adapt-this-other-flysky-ibus-library-to-teensy-family.76875/#post-357976