Pin headers / What do I connect the Doppler pins to?

4

Thanks! I am still confused about certain things. For example:

  • The quick start guide is useful, but it consists of many acronyms. I know what some of them mean but not others. Is there a list somewhere that explains the quick start labels? For example what is the meaning of the “PA” labels?

  • Where can I find documentation for the arduino api used on this chip (ie in C, what constants are defined)? For example on the ATMega arduino I used previously I could consult the Atmel manual to get information about chip features.

    Is there some SAMD51 doc which is close enough to the Doppler that, if I do something the doc says on the Doppler, and it does not work, that qualifies as a “bug” I should file on github?

  • My current problem I’m hitting: The SAMD51 is described in many places as having pseudo-DAC support via PWM on digital GPIO pins. On my ATMega arduino this is supported by calling analogWrite(PINNUM, VAL). When I try this on the Doppler I get this linker error:

      core/core.a(wiring_analog.c.o): In function `analogWrite':
  /Users/mcc/Library/Arduino15/packages/dadamachines - M4/hardware/samd/1.3.1/cores/arduino/wiring_analog.c:515: undefined reference to `GCLK_CLKCTRL_IDs'
  collect2: error: ld returned 1 exit status
  exit status 1

    How should I proceed?