www.pudn.com > ads8364.rar > ADS8364_MAIN.c

/************************************************************/ 
/* FILENAME: ADS8364_MAIN.c                            		*/ 
/* DESCRIPTION: This program uses the parallel interface to */ 
/*	read 512 samples continuously from the ADS8364 16-bit   */ 
/* 500KSPS Analog-to-Digital Converter.  The samples are    */ 
/* stored in buffers.                                		*/              
/* AUTHOR	: DAP Application Group, T. Hendrick, Dallas    */ 
/*    CREATED 2002(C) BY TEXAS INSTRUMENTS INCORPORATED.  	*/ 
/* VERSION: 1.0 							                */ 
/************************************************************/ 
#include "DSP28_Device.h" 
#include "DSP28_Globalprototypes.h" 
#include "ADS8364_2812.h" 
 
#define DEBUG 0 
 
// Prototype statements for functions found within this file. 
void delay_loop(int count); 
void read_ADD(void); 
 
void main(void) 
{ 
// Channel pointers - channels are defined in ADS8364_2812.h 
	ptrCHA0 = (int *)CHA0; 
	ptrCHA1 = (int *)CHA1; 
	ptrCHB0 = (int *)CHB0; 
	ptrCHB1 = (int *)CHB1; 
	ptrCHC0 = (int *)CHC0; 
	ptrCHC1 = (int *)CHC1; 
 
			 
// Initialize System Control registers, PLL, WatchDog, Clocks to default state: 
    // This function is found in the DSP28_SysCtrl.c file. 
    InitSysCtrl(); 
 
// Select GPIO for the device or for the specific application: 
    InitGpio();    
 
// Hardware Reset the ADS8364: 
	ResetADS8364(); 
	ADC_ready = 1; 
	#if !ADD 
    GpioDataRegs.GPFCLEAR.all = 0x0004;  // Set ADD Pin High 
    #else 
    GpioDataRegs.GPFSET.all = 0x0004;  // Clear ADD pin	 
	#endif 
 
    // Disable and clear all CPU interrupts: 
    DINT; 
    IER = 0x0000; 
    IFR = 0x0000; 
 
    // Initialize Pie Control Registers To Default State: 
    // This function is found in the DSP28_PieCtrl.c file. 
    InitPieCtrl(); 
 
    // Initialize the PIE Vector Table To a Known State: 
    // This function is found in DSP28_PieVect.c. 
    // This function populates the PIE vector table with pointers 
    // to the shell ISR functions found in DSP28_DefaultIsr.c. 
    InitPieVectTable();     
     
// User specific functions, Reassign vectors, Enable Interrupts, etc: 
    XIntruptRegs.XINT1CR.all = 0x0001; 
	XIntruptRegs.XINT2CR.all = 0x0001; 
 
	PieCtrlRegs.PIEIER1.bit.INTx3 = 1;	// Enable WAKEINT (LPM/WD) in PIE group #1 
	PieCtrlRegs.PIEIER1.bit.INTx4 = 1;	// Enable WAKEINT (LPM/WD) in PIE group #1 
 
	IER |= 0x0001; 
 
    // Enable global Interrupts: 
	EINT;   // Enable Global interrupt INTM 
 
    // Start the Conversion Clock 
	PWM();  //ConvCLK from PWM1 
 
while(1) // Forever Loop 
	{ 
// Check initially for RESET, then after each read 
		if (DEBUG) 
		{	delay_loop(200); 
			read_ADD();		} 
 
		if (ADC_ready) 
		{ 
		ToggleHOLDx(HOLDall); 
		ADC_ready = 0; 
		} 
	} 
}      
 
 
// Read Function called from ISR in ADS8364_DefaultISR.c 
/******************************************************************************* 
 FUNC	: read_ADD 
 DESC	: Prepare the system for the ADC conversions. Everything is set up to 
 		  wait the CONV CLK start running (TIMER0) 
 ARGS	: void 
 RET	: void 
 *******************************************************************************/ 
void read_ADD() 
{ 
	if (ADD_Mode){ADC_address[0] = (*ptrCHA0);} 
	    CHA0_Data[idx] = *ptrCHA0; 
 
	if (ADD_Mode){ADC_address[1] = (*ptrCHA1);} 
	    CHA1_Data[idx] = *ptrCHA1; 
 
	if (ADD_Mode){ADC_address[2] = (*ptrCHB0);} 
	    CHB0_Data[idx] = *ptrCHB0; 
 
	if (ADD_Mode){ADC_address[3] = (*ptrCHB1);} 
	    CHB1_Data[idx] = *ptrCHB1; 
 
	if (ADD_Mode){ADC_address[4] = (*ptrCHC0);} 
	    CHC0_Data[idx] = *ptrCHC0; 
 
	if (ADD_Mode){ADC_address[5] = (*ptrCHC1);} 
	    CHC1_Data[idx] = *ptrCHC1; 
 
	idx = idx+1; 
	ADC_ready = 1;	 
	if(idx == Samples){ 
	idx = 0;  //Insert probe point here to update display 
	} 
} 
 
// Some Useful local functions 
void delay_loop(int count) 
{ 
    long      i; 
    for (i = 0; i < count; i++) {} 
} 
 
//=========================================================================== 
// End Program. 
//===========================================================================