- added #include "casp_lib.h" in Arduino.h
- some changes to main.cpp - check file for changes
- pin definitions modified/added in pins_arduino.h and variant_generic.h
- miliis and micros code modified for unsigned 64-bit in wiring_time.h and wiring_time.c
- cores/arduino/variant.h and variants/..../variant_generic.h files modified
- SPI.h file modified. SPI1 added. send() recv() functions added.
- Wire.h, Wire.cpp files modified. Wire1 and Wire2 added.
- HardwareSerial.h, HardwareSerial.cpp, WSerial.h, WSerial.cpp modified to enable Serial and Serial1


Debug serial is Serial1

DAC0 (A0) - PA4
DAC1 (A1) - PA5

SDA (default) pin A4
SCL (default) pin A5
SDA1 pin D20
SCL1 pin D21
SDA2 QWIIC - pin 3
SCL2 QWIIC - pin 4

SPI (default) - available on arduino default SPI pins
SPI_1 - available on SPI2 pin header (SPI1, SPI2, SPI3 are used in CMSIS)

Serial TX (pin D1): PB6 USART1
Serial RX (pin D0): PB7 USART1

Serial1 TX (to MPU): PG7 LPUART1
Serial1 RX (from MPU): PG8 LPUART1

known issues:
- D4 (PA12) cannot be used for PWM but can be used for Servo as the internal timer can only be triggered externally.



