I want to use ad7124-4. So I bought the EVAL-CN0376-SDPZ boad. And I'm testing.
Firstly, I use the the EVAL hardware, and I want to control this device through STM320F28335.
SPI pin's /CS, MOSI, MISO, CLK are connected.
I set channel, config, filter, error, adc as follows.
0x09, 0x90, 0x23
0x1A, 0x09, 0xF7
0x07, 0x00, 0x00, 0x68
0x01, 0x01, 0x84
final read action as follows:
0x42, 0x00, 0x00, 0x00
But, the Dout level from AD7124 is too low. So the 28335 could not read the data well.
I just see gabage datas...
I attach the scope picture when I read the datas.
yellow line: /CS,
green line: CLK,
blue line: SDI (MOSI)
pupple line: SDO (MISO)
the SDO data from AD7124 is too low..
What did I do wrong?
I waiting for apply..