example_dps2812m_extram.c

代码是北京合众达公司提供的TMS320F2812的例子程序

/* =================================================================================
File name:       	Example_DPS2812M_EXTRAM.c                   
                    
Originator:				SEED R&D Group
		
Description: 
                  Example Program That Executes From XINTF (assumes MPNMC = 1)
                  As supplied, this project is configured for "boot from XINTF Zone 7" 
                  operation. 
  
                  XMP/MCn pin = 1
  
                  Map the region for XINTF Zone 7 as RAM in Code Composer
                 (Refer to the F2812.gel file supplied with CCS Studio) 
                 
                 This example configures CPU Timer0 and increments
                 a counter each time the timer asserts an interrupt.
 
                 Watch Variables:
                  CpuTimer0.InterruptCount
                  BackGroundCounter
=====================================================================================
 History:
-------------------------------------------------------------------------------------
 10-20-2005		Release	Rev 1.0         Jijunhui                                          
------------------------------------------------------------------------------*/

// Step 0: Include required header files:
//         DSP281x_Device.h: device specific definitions #include statements for
//         all of the peripheral .h definition files.

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File
#include "Examples_DPS2812M_EXTRAM.h"


void main(void)
{
	Uint32 LoopVar;
    //-----------------------------------------------------------------------
    // Step 1 to Step 5 should be followed in all designs:
    //
    // Step 1: Disable and clear all CPU interrupts:
       DINT;
       IER = 0x0000;
       IFR = 0x0000;

    // Step 2. Initialize System Control registers, PLL, WatchDog, Clocks to default state:
    //         This function is found in the DSP281x_SysCtrl.c file.
    InitSysCtrl();

    // Step 3. Select GPIO for the device or for the specific application:
    //         This function is found in the DSP281x_Gpio.c file.
    // InitGpio();  // Not required for this example

    // Step 4. Initialize PIE to known state (control registers and vector table):
    //         The PIE vector table is initialized with pointers to shell Interrupt 
    //         Service Routines (ISR). The shell routines are found in DSP281x_DefaultIsr.c.
    //         Insert user specific ISR code in the appropriate shell ISR routine in 
    //         the DSP281x_DefaultIsr.c file.
    //
    //         Initialize Pie Control Registers To Default State:
    //         This function is found in the DSP281x_PieCtrl.c file.
    InitXintf();

    ERTM;										// Enable Global realtime debug DBGM

    for(LoopVar = 0; LoopVar < SRAM_LENGTH; LoopVar++)
	{
		sram_data[LoopVar] = LoopVar;
	}
	for(LoopVar = 0;  LoopVar < SRAM_LENGTH; LoopVar++)
	{
		if(sram_data[LoopVar] != LoopVar)
		{
			good_flag = 0;
			break;
		}
		good_flag = 1;
	}
	if(good_flag == 1)
	{
		for(;;);
	}
	else
	{
		for(;;);
	}
}