main.c

SEED-DaVinci_EVM ddr 开发源代码

#include "stdio.h"
#include "davincievm.h"
#include "davincievm_emif.h"

extern Int16 ddr_test( );
Int16 sram_init( )
{
    /*------------------------------------------------------------------*
     *  SRAM CHIP TIMEOUT @ 594 MHz                                     *
     *                                                                  *
     *  AEMIF.CLK freq   = PLL1/6 = 594/6 = 99 MHz                      *
     *  AEMIF.CLK period = 1/99 MHz = 10.1 ns                           *
     *                                                                  *
     *------------------------------------------------------------------*/
    Uint32 acfg2 = 0
        | ( 0 << 31 )           // selectStrobe
        | ( 0 << 30 )           // extWait
        | ( 0 << 26 )           // writeSetup      //   0 ns
        | ( 9 << 20 )           // writeStrobe     //  85 ns
        | ( 0 << 17 )           // writeHold       //   0 ns
        | ( 0 << 13 )           // readSetup       //   0 ns
        | ( 6 << 7 )            // readStrobe      //  60 ns
        | ( 0 << 4 )            // readHold        //   0 ns
        | ( 1 << 2 )            // turnAround      //  10 ns
        | ( 1 << 0 )            // asyncSize       // 16-bit bus
        ;

    DAVINCIEVM_EMIF_config( acfg2, 
                            AEMIF_MAX_TIMEOUT_16BIT, 
                            AEMIF_MAX_TIMEOUT_16BIT, 
                            AEMIF_MAX_TIMEOUT_16BIT );

    AEMIF_NANDFCR = 0x00000000;

    return 0;
}
/* ------------------------------------------------------------------------ *
 *                                                                          *
 *  main( )                                                                 *
 *                                                                          *
 * ------------------------------------------------------------------------ */
void main( void )
{
    /* Initialize BSL */
   // DAVINCIEVM_init( );
   // sram_init( );
	if(ddr_test() != 0)
	{
		printf( "Testing DDR2 MEMORY FAIL... \n");
	}
	else
	{
		printf( "Testing DDR2 MEMORY PASS... \n");
	}
    
    SW_BREAKPOINT;
}