This change prevents spi4teensy3 from interfering with other native SPI libraries using the native chip select signals.
Writing zeros to the SPI_MCR_PCSIS can cause other SPI devices to suddenly receive an active-low chip select. Those 5 bits should always be written as ones when not using this feature. (yes, the code in Teensyduino also do this... I'm updating it now)
xxxajk
commented
10 years ago
This change prevents spi4teensy3 from interfering with other native SPI libraries using the native chip select signals.
Writing zeros to the SPI_MCR_PCSIS can cause other SPI devices to suddenly receive an active-low chip select. Those 5 bits should always be written as ones when not using this feature. (yes, the code in Teensyduino also do this... I'm updating it now)