ADAU1701 I2C boot

Hello Daniel,

SigmaDSPs are a bit fussy about their boot sequence; if anything is out of place they quit and go into idle mode. Thus, what the DSP reads from the EEPROM must match exactly what's shown in Figure 28 of the ADAU1701 Data Sheet, page 28. I attached a copy of your analyzer display set alongside the first line of Figure 28's template. It looks good until the "length" byte, which should specify five (5) more bytes to read from EEPROM and write to the DSP. The EEPROM reads back a (2) here instead, so the -1701 happily reads the following two bytes and then chokes (with a NAK) on the third. Once that happens it's all over, no more booting takes place.

Best regards,

Bob

Guess you're right, thanks.

Bob's debugging is correct.

In order to generate a proper image for your self-boot EEPROM, use SigmaStudio. Follow the steps in this tutorial: https://ez.analog.com/message/5759#5759

Thank you. I fixed my program, it seems to work now. I use the TxBuffer file generated by SigmaStudio for both uploading to the DSP directly and for EEPROM programming. Using the same file for both is easier for my development and should work.