mux of cspi on the iMX53 QSB

[Stefan1z]

Hi,

i have a i.MX53 QSB and i want to use the CSPI on the expanstion-port. Therefore i muxed the DISP0_DAT0 Pin to CSPI-SCLK, but there is already a signal on it. Even if i muxed it to gpio and set the value, this signal is still present. I controlled the mux with the mxc_iomux_v3_get_pad function from iomux-v3.c and everything seems right.

Is there anything that also uses the DISP0_DAT0 pin i don´t know or i miss?

best regards,

Stefan

[NicolasIzquierd]

Hi Stefan1z

Did you configure the Daisy Chain as well?

CSPI_IPP_CSPI_CLK_IN_SELECT_INPUT = 0b00

-ni.

[Stefan1z · Accepted solution]

Hi Jose,

yes the Daisy Chain was correct. It was the hdmi/display-output on the expander which tries to send data, even when it wasn´t set as IPU.