Part Number: TLV320ADC3140
Spi clock and phase has been configured as in the figure 87 and 88 of the datasheet.
Writing the configuration registers seems to work (audio output is coherent with parameters written in the biquad)
The problem is the reading:
Setting the "page register" to 0 and then reading the coefficient registers (for example register 8) gives wrong values. For example the first read byte is always 0xFF.
Normally there is no problem on reading on page 0, but after a reading on page 2, the first successive reading of 1 byte in page 0 returns always 0xFF.
In the picture below you can find Clock(red) and miso(blu)... green byte is the first replyed byte.
This happens with ADC powered ot unpowered (reg. 0x75).
We need to read this registes only for debug.
