Function mynewt::hw::hal::hal_spi_init_hw

pub unsafe extern "C" fn hal_spi_init_hw(
    spi_num: u8, 
    spi_type: u8, 
    cfg: *const hal_spi_hw_settings
) -> c_int

Initialize SPI controller

This initializes SPI controller hardware before 1st use. Shall be called only once.

• spi_num: Number of SPI controller
• cfg: Configuration

Return: 0 on success, non-zero error code on failure