Hello all, i have integrated soft_spi driver in u-boot, in order to communicate with a FRAM device, using some GPIO.
I use mode 0 of spi (CPHA=0, CPOL=0). When i try to communicate with the device, i have a problem, none of my commands are answered. After looking signals with scope, i see that if CPHA and CPOL are 0, there is a rising edge on the clock signal, before data is set on mosi signal. So the device get a first byte in an "unknown state". looking at the code, we can see that if CPHA is 0, we put a rising edge on clock before any data management. I made work the communication by forcing CPHA to 1 but i think it is not good way. Is there something i don't understand? thank you in advance for your answer. Regards Laurent Vaudoit
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