[PIC®/AVR®/dsPIC®产品] SPI的配置方式

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init SPI                                                                                                */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Configure as a master, clock idle low, 32-bit transaction, drive output on falling clock edge and latch input on rising edge. */

    /* Set IP clock divider. SPI clock rate = 2 MHz */

    SPI_Open(SPI0, SPI_MASTER, SPI_MODE_0, 32, 2000000);

    /* Select HCLK as the clock source of SPI0 */

    CLK_SetModuleClock(SPI0_MODULE, CLK_CLKSEL1_SPI0_S_HCLK, MODULE_NoMsk);



    /* Enable SPI0 peripheral clock */

    CLK_EnableModuleClock(SPI0_MODULE);

    /* Setup SPI0 multi-function pins */

    SYS->P0_MFP &= ~(SYS_MFP_P04_Msk | SYS_MFP_P05_Msk | SYS_MFP_P06_Msk | SYS_MFP_P07_Msk);

    SYS->P0_MFP |= (SYS_MFP_P04_SPISS | SYS_MFP_P05_MOSI | SYS_MFP_P06_MISO | SYS_MFP_P07_SPICLK);

            /* Write to TX register */

            SPI_WRITE_TX0(SPI0, g_au32SourceData[u32DataCount]);

            /* Trigger SPI data transfer */

            SPI_TRIGGER(SPI0);

            /* Check SPI0 busy status */

            while(SPI_IS_BUSY(SPI0));