SPI MISO outputs sclk

Embedded Devices Linux
1

9P 9215 development board
DEL 5.7.0
target device running LINUX: 2.6.35.14

Hello,

I am running the test C code for SPI with the spidev1.0 device file.

Writing to devices works as I can control the I/O pins of the MCP23S08 I/O expander.

However, no matter what data I send out the MISO(RXD) pin of the developmnet board outputs the clock.
It does this even if I have the MISO(RXD) pin disconnected from the slave.

Any help is greatly appreciated.

Tim

2

Which SPI device are you trying to use?
Make sure that you have configured SPI properly in kernel/rootfs configuraton.

Refer Digi ESP > Help > Help Contents > Digi ESP for Embedded Linux > 9. Devices and Interfaces 9.25. Serial Peripheral Interface (SPI)

3

Hello,

It turns out that the MISO and SCLK are shorted together on the dev board.

Thanks,

Tim