example_280xspi_sd.c

DSP2808例程。TMS320F2808DSP的各个模块的应用例程

#include "DSP280x_Device.h"     // DSP280x Headerfile Include File
#include "DSP280x_Examples.h"   // DSP280x Examples Include File
#include "type.h"
#include "spi_mmc.h"
//#include "mmcmain.h"
#define MAX_BLOCK_NUM		0x80
#define SD_cs_Hi	GpioDataRegs.GPASET.bit.GPIO27   = 1 
#define SD_cs_Lo	GpioDataRegs.GPACLEAR.bit.GPIO27 = 1

extern BYTE MMCWRData[MMC_DATA_SIZE];
extern BYTE MMCRDData[MMC_DATA_SIZE];

// Prototype statements for functions found within this file.
// interrupt void ISRTimer2(void);
void delay_loop(void);
void spi_b_init();


void main(void)
{
	DWORD i, BlockNum = 0;
   
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP280x_SysCtrl.c file.
   InitSysCtrl();

// Step 2. Initalize GPIO: 
// This example function is found in the DSP280x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();  // Skipped for this example  
// Setup only the GP I/O only for SPI-A functionality
// This function is found in DSP280x_Spi.c
   InitSpiaGpio();

// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts 
   DINT;

// Initialize PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.  
// This function is found in the DSP280x_PieCtrl.c file.
   InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
   IER = 0x0000;
   IFR = 0x0000;
   
// Initialize the PIE vector table with pointers to the shell Interrupt 
// Service Routines (ISR).  
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in DSP280x_DefaultIsr.c.
// This function is found in DSP280x_PieVect.c.
   InitPieVectTable();
	
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP280x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
   //spi_b_init();		  // init SPI

// Step 5. User specific code:
// Interrupts are not used in this example. 
  SPI_Init();						/* initialize SPI for MMC card */
  
  if ( mmc_init() != 0 )//MMC 初始化
  {	
	//IOSET0 = SPI_SEL;				/* set SSEL to high */
	SD_cs_Hi;
	while ( 1 );					/* Very bad happened */	
  }

  /* write, read back, and compare the complete 64KB on the MMC 
   * card each block is 512 bytes, the total is 512 * 128 */
  for ( BlockNum = 0; BlockNum < MAX_BLOCK_NUM; BlockNum++ )
  {

	if ( mmc_write_block(BlockNum) == 0 )
	{
	   mmc_read_block(BlockNum);
	}
	else
	{
       //IOSET0 = SPI_SEL;					/* set SSEL to high */
  	   SD_cs_Hi;
  	   while ( 1 );							/* Very bad happened */
	}

	for ( i = 0; i < MMC_DATA_SIZE; i++ )	/* Validate */
	{
	  if ( MMCRDData[i] != (MMCWRData[i]&&0xff) )
	  {
		//IOSET0 = SPI_SEL;					/* set SSEL to high */
		SD_cs_Hi;
		while ( 1 );						/* Very bad happened */
	  }
	}
	for ( i = 0; i < MMC_DATA_SIZE; i++ )	/* clear read buffer */
		MMCRDData[i] = 0x00;
  }							
   for(;;)
   { 
     
   }
} 


// Step 7. Insert all local Interrupt Service Routines (ISRs) and functions here:	

void delay_loop()
{
    long      i;
    for (i = 0; i < 1000000; i++) {}
}


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// No more.
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