MRK zero

[Josef]

i am trying to run your example code on an costum pcb with the same microconroller as on the arduino mrk zero sda3 is on pa22 and scl3 on pa23. i cant get your example sketches running. and after the first i2c statment is done in your code serialmonitor is stoped working

[Steve arnold]

Hi Josef, you should check your custom board and ensure the connections are correct and reliable. I have had a similar problem to you while developing my application. It is possible for the library to freeze when reading from your device because of this line -while(Wire.available() == 0);
used in the functions readOneByte and readTwoBytes.
If the device does not return a value, the while loop will wait forever. :-(

[Steve arnold]

Hi Josef, a correction to my previous comment, the while loop in readTwoBytes is like this-
while(Wire.available() == 0){ Serial.println("Wait"); }
So when this hangs, you will get an endless sequence of "wait" messages on the serial port.

[Josef]

thanks for your help but that was not my point .but i figured out now a general way to use non arduino default i2c pins.
therefor you have to know which pins do use which sercom in my case sercom 3 sdapin 0 sclpin1

than you need to import
1.#include "wiring_private.h"

declare vars like
2.
uint8_t SDA1 = 0;
uint8_t SCL1 = 1;
TwoWire I2Cone = TwoWire(&sercom3, SDA1, SCL1);

add an begin fkt and callit after serial.begin in voiud setup.
3.
void AS5600::Begin()
{
I2Cone.begin(); // SDA pin 21, SCL pin 22 TTGO TQ
pinPeripheral(0, PIO_SERCOM); //Assign SDA function to pin 0
pinPeripheral(1, PIO_SERCOM);
}

replace all "Wire" with "I2Cone"
4.

[Josef]

https://github.com/josefgull/mrk-non-deflault-Arduino-i2c-pins/tree/main
here are two examples where i changed lib s