DS90UB941AS-Q1: DS90UB941AS-Q1 SPI use problem

hi,Hamzeh

My email address is as follows: lpf@vikeer.com
Thanks for your help.

hi,Hamzeh

We modified the code. The CLK and SS pins have correct signal output, but the MISO and MOSI pins have no signal. Our configuration for 941 and 948 is as follows：
write(941,0x03,0x9A); write(941,0x62,0x00); write(941,0x20,0x8F); write(941,0x21,0x06);
write(941,0x1E,0x01); write(941,0x0D,0x33); write(941,0x0E,0x05); write(941,0x1E,0x02);
write(941,0x0D,0x03); write(941,0x0E,0x00); write(941,0x1E,0x01);

/*------------------------------------------------------------------------------------------------------------------*/

write(948,0x43,0x16); write(948,0x23,0x60); write(948,0x34,0x41); write(948,0x1D,0x05);
write(948,0x1E,0x03); write(948,0x34,0x42); write(948,0x1D,0x00); write(948,0x1E,0x00);
write(948,0x1E,0x03); write(948,0x34,0x41);

We have used some GPIO mapping, so we configured some registers about GPIO and D_GPIO.

Remove the last write(948,0x1E,0x03), this is a copy error.

Hello,

are you using Dual lane mode? SPI is only available in dual lane mode!

Are you using Forward channel SPI or reverse channel SPI? This is important to know, since you need to configure all the used pins/GPIOs in the correct direction, as per Table 2 in the provided AppNote.

We are using Dual FPD-link tx mode, forward Channel mode. Regarding GPIO, we will reconfigure all of them for testing.Thanks for your help.