Dear “Citric”, Thank you for your answer, but my problem is solved. I was not enough thorough reading WIKI (RP2040 install). But I suggest to pay attantion, that in Basic Blink sketch we have to change the pin 13 to 25!
Other.
I designed a potentiostat with XIAO RP2040 and AD5941. Now I would like to test my circuit. So, can you help me? I would like to write a very simple arduino sketch: write and read values into the internal registers (after AD5941 guide p. 98.).
Istvan
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