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Re: [softrock40] Re: Unexpected results testing USB-I2C and SI-570

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  • Alan
    ... From: harvey_babb Subject: [softrock40] Re: Unexpected results testing USB-I2C and SI-570 ... Ah! Yes, I had forgotten that. I cured my early one by
    Message 1 of 4 , Aug 3 10:53 PM
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      ----- Original Message -----
      From: "harvey_babb"
      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
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