Trouble connecting to module through sigma studio
Hello,
We are attempting to use Sigma studio and ADUSB2EBZ USB adapter in order to debug our custom board but we are having a problem where we often get a "Compiled Comms Failed" issue when attempting to connect or after a being connected or a while and trying to make a change. Sometimes we are able to go a few hours without the issue and other times we are unable to connect the for an entire day. As of yet, there does not seem to be a pattern to when it does or does not work.
We have attempted power cycling the board, disabling usb3 from the USB interface, resetting the USB interface, un plugging and replugging the USB adapter, reinstalling the drivers, reinstalling Sigma Studio, rebooting the computer, amongst other things and none of which reliably get the module to connect.
Our board uses an ADAU1451 DSP chip with the SDA, SCL, and GND pins going out to a connector that we connect the ADUSB2EBZ USB adapter to.
Is there something in the connection process that we are missing to get reliable a reliable connection?
Thank you for your time
Audio Signal Processors
adau1451
hardware
adusb2ebz
comms_failed
sigmastudio
SigmaDSP Audio Processors
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Hello,
In one of our designs we have 1 K-ohm pullups to 3.3 V on the SDA and SCL lines at the USBi connector. I would have to ask our HW engineer why, yet perhaps this would help. In the general case you could scope these signals to check for any irregularities.
Best regards,
Bob
Hello ADSTK,
As Bob said, probe the I2C bus and send us some scope shots and attach your hardware schematics if possible.
Also, make sure that the switch (S1) on the USBi module is set to output 3.3V IOVDD.
Regards,
Harish
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