Function riot_sys::spi_init_cs

pub unsafe extern "C" fn spi_init_cs(
    bus: spi_t,
    cs: spi_cs_t
) -> c_int

@brief Initialize the given chip select pin

The chip select can be any generic GPIO pin (e.g. GPIO_PIN(x,y)), or it can be a hardware chip select line. The existence and number of hardware chip select lines depends on the underlying platform and the actual pins used for hardware chip select lines are defined in the board’s periph_conf.h.

Define the used chip select line using the @ref SPI_HWCS(x) macro for hardware chip select line x or the GPIO_PIN(x,y) macro for using any GPIO pin for manual chip select.

@param[in] bus SPI device that is used with the given CS line @param[in] cs chip select pin to initialize

@retval 0 success @retval -ENXIO invalid device @retval -EINVAL invalid CS pin/line