1.1.8.3 Configuring The Library

SPI Driver Library should be configured via MHC. The following figures show the MHC configuration window for SPI driver and brief description.

Common User Configuration for all Instances

  • Driver Mode:

    • Allows User to select the mode of driver(Asynchronous or Synchronous). This setting is common for all the instances.

Instance Specific User Configurations

SPI Driver Configuration in Asynchronous Mode

drv_spi_mhc_config_async

  • PLIB Used:

    • Indicates the underlying SPI PLIB used by the driver.

    • The SPI driver only supports connecting to the SPI PLIB in master mode.

  • Number Of Clients:

    • The total number of clients that can open the given SPI driver instance

  • Transfer Queue Size:

    • Indicates the size of the transfer queue for the given SPI driver instance

    • Available only in Asynchronous mode of Operations

  • Use DMA for Transmit and Receive?

    • Enables DMA For transmitting and receiving the data for that instance

    • DMA Channel For Transmit:

      • DMA Channel for transmission is automatically allocated in DMA configurations

    • DMA Channel For Receive:

      • DMA Channel for Receiving is automatically allocated in DMA configurations