sport0_isr.c

来自「VisualDSP++4.0」· C语言 代码 · 共 46 行

#include <sys\exception.h>
#include <cdefBF561.h>

#include "ad1836.h"
#include "TDMchannels.h"


// SPORT0 DMA transmit buffer for data transfer
volatile int iDMATxBuffer[8];
// SPORT0 DMA receive buffer for data transfer
volatile int iDMARxBuffer[8];

// Flag to indicate that a new sample has been read by the SPORT0 ISR
char cNewSample = 0;

//--------------------------------------------------------------------------//
// Function:	Sport0_RX_ISR												//
//																			//
// Description: This ISR is executed after a complete frame of input data 	//
//				has been received. The new samples are stored in 			//
//				iADCnC. The processed values are copied from the 			//
//				variables iDACnV into the dma 								//
//				transmit buffer.											//
//--------------------------------------------------------------------------//
EX_INTERRUPT_HANDLER(Sport0_RX_ISR)
{
	// confirm interrupt handling
	*pDMA2_0_IRQ_STATUS = 0x0001;

	// copy input data from dma input buffer into variables for global access
	iADC1L = iDMARxBuffer[INTERNAL_ADC_L0];
	iADC1R = iDMARxBuffer[INTERNAL_ADC_R0];
	iADC2L = iDMARxBuffer[INTERNAL_ADC_L1];
	iADC2R = iDMARxBuffer[INTERNAL_ADC_R1];

	// copy processed data from variables for global access into dma output buffer
	iDMATxBuffer[INTERNAL_DAC_L0] = iDAC1L;
	iDMATxBuffer[INTERNAL_DAC_R0] = iDAC1R;
	iDMATxBuffer[INTERNAL_DAC_L1] = iDAC2L;
	iDMATxBuffer[INTERNAL_DAC_R1] = iDAC2R;
	iDMATxBuffer[INTERNAL_DAC_L2] = iDAC3L;
	iDMATxBuffer[INTERNAL_DAC_R2] = iDAC3R;

	cNewSample = 1;
}