Function esp_idf_sys::spicommon_bus_initialize_io

pub unsafe extern "C" fn spicommon_bus_initialize_io(
    host: spi_host_device_t, 
    bus_config: *const spi_bus_config_t, 
    dma_chan: c_int, 
    flags: u32, 
    flags_o: *mut u32
) -> esp_err_t

@brief Connect a SPI peripheral to GPIO pins

This routine is used to connect a SPI peripheral to the IO-pads and DMA channel given in the arguments. Depending on the IO-pads requested, the routing is done either using the IO_mux or using the GPIO matrix.

@param host SPI peripheral to be routed @param bus_config Pointer to a spi_bus_config struct detailing the GPIO pins @param dma_chan DMA-channel (1 or 2) to use, or 0 for no DMA. @param flags Combination of SPICOMMON_BUSFLAG_* flags, set to ensure the pins set are capable with some functions: - SPICOMMON_BUSFLAG_MASTER: Initialize I/O in master mode - SPICOMMON_BUSFLAG_SLAVE: Initialize I/O in slave mode - SPICOMMON_BUSFLAG_NATIVE_PINS: Pins set should match the iomux pins of the controller. - SPICOMMON_BUSFLAG_SCLK, SPICOMMON_BUSFLAG_MISO, SPICOMMON_BUSFLAG_MOSI: Make sure SCLK/MISO/MOSI is/are set to a valid GPIO. Also check output capability according to the mode. - SPICOMMON_BUSFLAG_DUAL: Make sure both MISO and MOSI are output capable so that DIO mode is capable. - SPICOMMON_BUSFLAG_WPHD Make sure WP and HD are set to valid output GPIOs. - SPICOMMON_BUSFLAG_QUAD: Combination of SPICOMMON_BUSFLAG_DUAL and SPICOMMON_BUSFLAG_WPHD. @param[out] flags_o A SPICOMMON_BUSFLAG_* flag combination of bus abilities will be written to this address. Leave to NULL if not needed. - SPICOMMON_BUSFLAG_NATIVE_PINS: The bus is connected to iomux pins. - SPICOMMON_BUSFLAG_SCLK, SPICOMMON_BUSFLAG_MISO, SPICOMMON_BUSFLAG_MOSI: The bus has CLK/MISO/MOSI connected. - SPICOMMON_BUSFLAG_DUAL: The bus is capable with DIO mode. - SPICOMMON_BUSFLAG_WPHD The bus has WP and HD connected. - SPICOMMON_BUSFLAG_QUAD: Combination of SPICOMMON_BUSFLAG_DUAL and SPICOMMON_BUSFLAG_WPHD. @return - ESP_ERR_INVALID_ARG if parameter is invalid - ESP_OK on success