Wire Slave

[sandeepmistry]

Some changes to get Wire slave working, including:

• calling pinPeripheral in begin to setup SDA and SCL pins like the master begin
• enabling the stop condition interrupt (SERCOM_I2CS_INTENSET_PREC)
• ACK'ing or NACK'ing in the ISR and sending the appropriate command bits to clear the flags

Note: there is still an issue with repeated starts, the timeout is not working, so if a repeated start is received without a subsequent stop or another repeated start, the receive callback is not called currently.

[cmaglie]

@ArduinoBot build this please

[ArduinoBot]

✅ Build completed.

⬇️ Build URL: http://downloads.arduino.cc/PR/samd/package_samd-b40_index.json

ℹ️ To test this build:

1. Open the Preferences of the Arduino IDE.
2. Add the Build URL above in the Additional Boards Manager URLs field, and click OK.
3. Open the Boards Manager (menu Tools->Board->Board Manager...)
4. Install Arduino SAMD core - Pull Request Wire Slave #46
5. Select one of the boards under SAMD Pull Request Wire Slave #46 in Tools->Board menu
6. Compile/Upload as usual