Hey guys! I’m configuring GPIO 20 as our chip select line for the SPI device. After setup, I could read the SPI_CLK and SPI_MOSI correctly. However, the chip select was always low. It should be high when no data is sent and go low when data on line. What made the thing strange is that, when i used …

Issues when configure different GPIO as SPI chip select line

floydqueen March 2, 2016, 1:29am 5

Probably those missing GPIOs are being used by other applications.

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