Three wire SPI Interface Test

anshulkhare — Mon, 22 Jan 2018 10:48:31 GMT

Hello All,

i am using imx6ul board, and in that i am enabling SPI Driver but it is a 4 wire interface ,

as per the requirement i need to test 3 wire interface test SPI.

is there any possibility that i can perform this test.

--Anshul

Re: Three wire SPI Interface Test

igorpadykov — Mon, 22 Jan 2018 11:27:07 GMT

Hi Anshul

board uses ECSPI4_SCLK,ECSPI4_SS0,ECSPI4_MOSI,ECSPI4_MISO, if

some of these signals are not used by external SPI device, they may be ignored

without additional configuration. For example according to sect.20.4.1 Master Mode i.MX6UL Reference Manual:
One of the Chip Select (SS) signals and the clock signal (SCLK) are used to transfer data
between two devices. If the external device is a transmit-only device, the ECSPI master's
output port can be ignored and used for other purposes.

Best regards
igor
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