main.asm

ADI公司SHARC与BlackFin通过SPI协议相互通信的源代码

/*****************************************************************************
**                                                                          **
**  Name:   BF537 SPI SLAVE                                                 **
**                                                                          **
******************************************************************************

(C) Copyright 2006-2008 - Analog Devices, Inc.  All rights reserved.

Project Name:   BF537_SPI_SLAVE

Date Modified:  05/07/2008  v1.0

History:        09/11/2006  initial version

Tested
Software:       VisualDSP++ 5.0 (Update 2)

Hint:           Optimized for VisualDSP++ 5.0.0.0 and above

Tested
Hardware:       ADSP-BF537 EZ-KIT Lite Rev. 1.3 Silicon Rev. 0.2
                ADSP-BF537 EZ-KIT Lite Rev. 2.2 Silicon Rev. 0.3

Supported
Plattforms:     ADSP-BF537 EZ-KIT Lite

Connections:    ADDS-HPUSB-ICE

Settings:       Default

Purpose:        Communication between two ADSP-BF537 EZ-KIT Lite via SPI
                Single Master <-> Single Slave Environment
                One Master, initializing data transfer, drives SSEL and SCLK
                One Slave, receiving/transmitting data

                All relevant settings are done in 'configurations.h'
                All supported modes are described in 'configurations.h'

*****************************************************************************/

/****************************************************************************
 Include Section
*****************************************************************************/

#include "global.h"
#include "INIT.h"
#include "SPI.h"
#include "data.h"

/*****************************************************************************
 Prototypes
******************************************************************************/

.GLOBAL _main;

/****************************************************************************
 Main Program
*****************************************************************************/


.SECTION L1_code;

_main:

    call __clear_reg;
    call __gpio_ports_setup;
    call __interrupts_setup;

    START:
    #if defined SPI_MODE_TRC /* Transmit->Receive->Compare */
        call __spi_run_tx;
        call __spi_run_rx;
        IMM32(I0,rx_buf);IMM32(I1,tx_buf);IMM32(P5,n);
        call __compare;
    #endif

    #if defined SPI_MODE_RCT /* Receive->Cop->Transmit */
        call __spi_run_rx;
        IMM32(I0,rx_buf);IMM32(I1,tx_buf);IMM32(P5,n);
        call __copy;
        call __spi_run_tx;
    #endif

    #if defined SPI_TRANSMIT
        call __spi_run_tx;
    #endif

    #if defined SPI_RECEIVE
        call __spi_run_rx;
        IMM32(I0,rx_buf);IMM32(I1,tx_buf);IMM32(P5,n);
        call __compare;
    #endif

    R4 += 1;


    call __led_all_blink_inf;
    EMUEXCPT; nop;
    jump START;
    again: jump again;


_main.end:


/*****************************************************************************
 EOF
******************************************************************************/