main.c

ADS8345 to TMS320C5416 DSP

/************************************************************
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/************************************************************
* FILENAME: main.c                            				
* DESCRIPTION: This example program uses McBSP1, DMA4              
* 	and DMA5 of 'C5416 to read 2048 samples from the ADS8345  
*  	16-bit 100KSPS Analog-to-Digital Converter.  The samples 
* 	are stored by DMA5 in an array called buffer.  When the
* 	DMA has transferred all 2048 samples it interrupts 
*	the CPU.  At which point, the CPU disables all the 
*	perpherals and begins to sort the data by channel. All
*	the samples read from analog input 0 are stored in 
*	Chan0, and likewise for the other 7 channels.
* Hardware Connections:									
*		ADC pin	->  DSP pin									
*		CS# 	->	GPIO (assumed LOW)							
*		CLK 	->  CLKX1										
*		DIN		->  DXR1										
*		DOUT 	-> 	DRR1										
*		BUSY 	-> 	FSR1									 */
/*************************************************************/
/* AUTHOR: DAP Application Group, L. Philipose, Dallas       */
/*         CREATED 2002(C) BY TEXAS INSTRUMENTS INCORPORATED.*/
/* VERSION: 1.0 							                 */
/*************************************************************/

/* Include DSPBIOS/CSL GUI configuration generated header file */
#include "c5416DMA_ads8345cfg.h"

/* Include files */
#include "ads8345.h"
#include <csl.h>
#include <csl_dma.h>
#include <csl_irq.h>
#include <csl_mcbsp.h>
#include <swi.h>
#include <log.h>

extern void ADC_init(void);

/* Global Variables*/
ioport unsigned int port1;  /**/ 

/* Place buffer in its own section, since this must reside in DMA */
/* Memory Map. Check your device datasheet for valid ranges of   */
/* DMA memory.                                                   */
//#pragma DATA_SECTION(buffer, "dmaMem")
extern Uint16 buffer[NSAMPLES];
//#pragma DATA_SECTION(CfgByte, "dmaMem1")
extern Uint16 CfgByte[NConfigWord]; 		/* A/D commands array */

/*************************************************************
*FUNCTION: main()
*DESCRIPTION: Function Initializes variables, enables 
* peripherals and DMA5 interrupt.
**************************************************************/

void main()
{
	Uint16 i=0;
/* Initialize CSL library, this step is required */
  	CSL_init();
	port1 |=0x2;  		/*set ADC CS# high*/
    while (i<=NSAMPLES)				/*Initialize Data Table*/
    {
   		buffer[i++]=0x0000;
	}
	
/*Load A/D Configuration Word Array*/
	CfgByte[0]=( START_BIT | CHAN0 | SGL_END_IN | NO_PDWN )<<8;  	
	CfgByte[1]=( START_BIT | CHAN1 | SGL_END_IN | NO_PDWN )<<8; 	
	CfgByte[2]=( START_BIT | CHAN2 | SGL_END_IN | NO_PDWN )<<8; 
	CfgByte[3]=( START_BIT | CHAN3 | SGL_END_IN | NO_PDWN )<<8; 
	CfgByte[4]=( START_BIT | CHAN4 | SGL_END_IN | NO_PDWN )<<8; 
	CfgByte[5]=( START_BIT | CHAN5 | SGL_END_IN | NO_PDWN )<<8; 
	CfgByte[6]=( START_BIT | CHAN6 | SGL_END_IN | NO_PDWN )<<8; 
	CfgByte[7]=( START_BIT | CHAN7 | SGL_END_IN | NO_PDWN )<<8; 

	
	port1 &=0xD;  	/*set ADC CS# low*/
	
	ADC_init();

/*Start Recieve channel*/
	DMA_start(hDma5);
/*Start Transmit channel*/
	DMA_start(hDma4);								

/* Prime MCBSP DXR */
 	while (!MCBSP_xrdy(hMcbsp1)){;}
 	MCBSP_write16(hMcbsp1,0x0000); 


	IRQ_enable(IRQ_EVT_DMAC5);	
}