initsru.asm

ADI 公司的DSP ADSP21369 EZ-KIT LITE开发板的全部源代码

/***************************************************************************************************
**
**  File: initSRU.asm
**  Date: 7/29/05
**  Use:  ADSP-21369 EZkit. The program initializes and sets the SRU & DAI/DPI pins
**
*****************************************************************************************************/

#include <def21369.h>

// The following definition allows the SRU macro to check for errors. Once the routings have
// been verified, this definition can be removed to save some program memory space.
// The preprocessor will issue a warning stating this when using the SRU macro without this
// definition
#define SRUDEBUG  // Check SRU Routings for errors.
#include <SRU.h>


.section /pm seg_pmco;
.global _initSRU;


_initSRU:

    // Disable the pull-up resistors on all 20 pins
    r0 = 0x000FFFFF;
    dm(DAI_PIN_PULLUP) = r0;

//--------------------------------------------------------------------------
// Route SPI signals to SPI FLASH.

    SRU(SPI_MOSI_O,DPI_PB01_I)      //Connect MOSI to DPI PB1.
    SRU(DPI_PB02_O, SPI_MISO_I)     //Connect DPI PB2 to MISO.
    SRU(SPI_CLK_O, DPI_PB03_I)      //Connect SPI CLK to DPI PB3.
    SRU(SPI_FLG0_O, DPI_PB05_I)     //Connect SPI FLAG3 to DPI PB5.
//---------------------------------------------------------------------------
// Tie pin buffer enable from SPI peipherals to determine whether they are
// inputs or outputs

    SRU(SPI_MOSI_PBEN_O, DPI_PBEN01_I);
    SRU(SPI_MISO_PBEN_O, DPI_PBEN02_I);
    SRU(SPI_CLK_PBEN_O, DPI_PBEN03_I);
    SRU(SPI_FLG0_PBEN_O, DPI_PBEN05_I);

//-----------------------------------------------------------------------------


_initSRU.end:
    rts;