Thank you for your help! Indeed, I didn't checked the pins in CDL. So I use the default values : AT91_SPI_NPCS0, AT91_SPI_NPCS1, AT91_SPI_NPCS2, AT91_SPI_NPCS3. Is it correct or do I havt to chage it? On my AT91 board, I connected the scope to the pins MOSI-GND and SCLK-GND, nothing on the analyzer. To check if a chip select was enabled, i measured voltage between GND and NSPICS5-8 and no CS were enabled. Nevertheless, I set the dev_num value of the cyg_spi_at91_device_t structure to the value 4-8. All voltages are to 3.3V and no CS is to 0V.
> O.K. Lets start with a silly question. Are you sure you are looking at > the correct pins. The pins used for NPCS are configurable by CDL. On > most AT91 devices, the peripheral devices can select between multiple > pins on the chip. Which pins do you have you logic analyze connected > to? Which pins is the SPI device driver using? > > Andrew -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
