Add Teensy 4.1 to Boards.h

[hoga85]

To run the example StandardFirmata with Teensy, it shows an error saying that the Board.h needs to be modified. If it is possible to add Teensy 4.1 to Board.h?

I made an attempt to sort out the pins for Teensy 4.1 by following the format of that used for Teensy 3.5&3.6, the attempt is as shown below. But then I am not sure how to further make it work. Hopefully, Teensy 4.1 can be considered to added to Boards.h.

// Teensy-4.1
// reference: https://github.com/PaulStoffregen/cores/blob/master/teensy4/pins_arduino.h
#elif defined(__IMXRT1062__)
#define TOTAL_ANALOG_PINS      18
#define TOTAL_PINS              55
#define VERSION_BLINK_PIN       13
#define PIN_SERIAL1_RX          0
#define PIN_SERIAL1_TX          1
#define PIN_SERIAL2_RX          7
#define PIN_SERIAL2_TX          8
#define PIN_SERIAL3_RX         15
#define PIN_SERIAL3_TX         14
#define PIN_SERIAL4_RX         16
#define PIN_SERIAL4_TX         17
#define PIN_SERIAL5_RX         21
#define PIN_SERIAL5_TX         20
#define PIN_SERIAL6_RX         25
#define PIN_SERIAL6_TX         24
#define PIN_SERIAL7_RX         28
#define PIN_SERIAL7_TX         29
#define PIN_SERIAL8_RX         34
#define PIN_SERIAL8_TX         35
#define IS_PIN_DIGITAL(p)      ((p) >= 0 && (p) <= 55) \\42 digital pins on the configuration plot, but 55 indicated in pins_arduino.h by Paul.
#define IS_PIN_ANALOG(p)       ((p) >= 14 && (p) <= 27 || (p) >= 38 && (p) <= 41 )
#define IS_PIN_PWM(p)          digitalPinHasPWM(p)
#define IS_PIN_SERVO(p)        ((p) >= 0 && (p) < MAX_SERVOS)
#define IS_PIN_I2C(p)          ((p) == 18 || (p) == 19)
#define IS_PIN_SERIAL(p)       (((p) > 13 && (p) < 18) || ((p) == 0 || (p) == 1) || ((p) == 7 || (p) == 8)|| ((p) == 24 || (p) == 25)|| ((p) == 28 || (p) == 29)|| ((p) == 34 || (p) == 35))
#define PIN_TO_DIGITAL(p)      (p)
// A0-A13 = D14-D27; A14-A17 = D38-D41;
#define PIN_TO_ANALOG(p)       ((p) <= 27 ? (p) - 14 : (p) - 24)
#define PIN_TO_PWM(p)           PIN_TO_DIGITAL(p)
#define PIN_TO_SERVO(p)        (p)

[soundanalogous]

Support for the Teensy 4.0 was added a while back. That block could be updated to support both 4.0 and 4.1 with the following changes:

// Teensy 4.0 & 4.1
#elif defined(__IMXRT1062__)
#define TOTAL_ANALOG_PINS       NUM_ANALOG_INPUTS
#define TOTAL_PINS              NUM_DIGITAL_PINS
#define VERSION_BLINK_PIN       13
#define PIN_SERIAL1_RX          0
#define PIN_SERIAL1_TX          1
#define PIN_SERIAL2_RX          7
#define PIN_SERIAL2_TX          8
#define PIN_SERIAL3_RX          15
#define PIN_SERIAL3_TX          14
#define PIN_SERIAL4_RX          16
#define PIN_SERIAL4_TX          17
#define PIN_SERIAL5_RX          21
#define PIN_SERIAL5_TX          20
#define PIN_SERIAL6_RX          25
#define PIN_SERIAL6_TX          24
#define PIN_SERIAL7_RX          28
#define PIN_SERIAL7_TX          29
#define IS_PIN_DIGITAL(p)       ((p) >= 0 && (p) < NUM_DIGITAL_PINS)
#ifdef ARDUINO_TEENSY40
  #define IS_PIN_ANALOG(p)        ((p) >= 14 && (p) <= 27)
  #define PIN_TO_ANALOG(p)        ((p) - 14)
#endif
#ifdef ARDUINO_TEENSY41
  #define IS_PIN_ANALOG(p)        (((p) >= 14 && (p) <= 27) || ((p) >= 38 && (p) <= 41))
  #define PIN_TO_ANALOG(p)        (((p) <= 27) ? (p) - 14 : (p) - 24)
#endif
#define IS_PIN_PWM(p)           digitalPinHasPWM(p)
#define IS_PIN_SERVO(p)         ((p) >= 0 && (p) < MAX_SERVOS)
#define IS_PIN_I2C(p)           ((p) == PIN_WIRE_SDA || (p) == PIN_WIRE_SCL)
#define IS_PIN_SERIAL(p)        (((p) >= 0 && (p) <= 1) || ((p) >= 7 && (p) <= 8) || ((p) >= 14 && (p) <= 17) || ((p) >= 20 && (p) <= 21) || ((p) >= 24 && (p) <= 25) || ((p) >= 28 && (p) <= 29))
#define PIN_TO_DIGITAL(p)       (p)
#define PIN_TO_PWM(p)           (p)
#define PIN_TO_SERVO(p)         (p)

Try that and let me know if it works. I have not tested it as I don't have either board nor have I tried making those changes and compiling for those respective boards (that's the first place to check for issues).

[psitech]

Try that and let me know if it works. I have not tested it as I don't have either board nor have I tried making those changes and compiling for those respective boards (that's the first place to check for issues).

Thanks.
Added your lines to boards.h. The StandardFirmata sketch now compiles without error on a Teensy 4.0 and a Teensy 4.1.
I was able to turn the LED on and off remotely on both Teensy's.
Did not check all pins and functionality though.