Re: [softrock40] Re: Unexpected results testing USB-I2C and SI-570
----- Original Message -----
Subject: [softrock40] Re: Unexpected results testing USB-I2C and SI-570
> I went back and retraced my steps and you are correct, there was no communication with the Si-570.
> What led me astray was the fact that I was using two completely different USB-I2C interfaces, one the "original" DG8SAQ chip and
> the other using pe0fko V15.11 Tiny85. The USB Synth utility behaves differently depending on which firmware version is used. When
> used with the "original" Tiny45 firmware, the utility will throw an error if it is not able to communicate with the Si-570. With
> the pe0fko V15.11 firmware, USB Synth does NOT report an error
Ah! Yes, I had forgotten that. I "cured" my early one by adding a pull-up to the SCL line. A 47K to the 5V line does this, then the
chip connects to USB and the dot is green. PE0FKO cured this properly in the code.
73 Alan G4ZFQ