For the first Eval board, I have prepared and test all its drivers, and specially, the SPI one.
I have made the SPI communication module (software and hardware) and tested them. I have emulated the battery pact voltages by a power supply. When, I try to make all parts initialization (using instruction given in ***doc Rev. 0), I 'll receive a non acknowledged frames (Write Acknowledge = 0) and a bad CRC value. It is the same when, I am trying to make a self-test.
I tried different SPI clk under 1MHz. My SPI Configuration is like this:
- SPI Mode 1 (CPHA=0,CPOL=1)
- SPI-DIV =8.
- SPI Master mode.
- SPI Enable
Do you have any explanation?