Sundance SMT326v2 - Manual (Page 14)

Release Page 14 of 24 SMT326 DSP PC/ISA System User Guide
Document Name: SMT326 Ugv2.doc Original Date: 08/11/97
Product Name: SMT326 Revision Date: 08/26/99
Author: Graeme Parker – Fabio Ancona
Test Code
Test both a ADC channel and a DAC channel
This first example shows how to test input/output channels. This particular code reads the ADC
channel 1 (IN1) and writes to DAC channel 0 (OUT0)
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/* SMT326 test program: Reads the ADC channel 1 (IN1) and writes to DAC channel 0 (OUT0) */
#include
#include
#include
volatile unsigned long *i2c_s1, *i2c_sn;
volatile unsigned long *fpga, *fpgain, *fpgaout, *prog, *status;
volatile int delay,adc_word;
int i,j,t,temp,ctrl_byte,sample, channel, outadd, mask;
main(int argc,char *argv[])
{
prog =(unsigned long *)0x80300000;
fpga =(unsigned long *)0x80200000;
i2c_s1=(unsigned long *)0x80100001;
i2c_sn=(unsigned long *)0x80100000;
/* Setup the I2C interface device */
printf("Setting up I2C interface\n");
*i2c_s1=0x80; /* select own address regsiter */
for(i=0;i!=8;i++);
*i2c_sn=0x55; /* set own address = 0x55 */
for(i=0;i!=8;i++);
*i2c_s1=0xa0; /* select register S2 (clock register) */
for(i=0;i!=8;i++);
*i2c_sn=0x1c; /* set clock = 12MHz */
for(i=0;i!=8;i++);
*i2c_s1=0x10; /* select interrupt vector register */
*i2c_s1=0x80;
for(i=0;i!=175;i++);
*i2c_sn=0x55; /* set own address = 0xff */
for(i=0;i!=175;i++);
*i2c_s1=0xa0;
for(i=0;i!=175;i++);
*i2c_sn=0x1c; /* set SCL=90kHz, ext clk=12MHz */
for(i=0;i!=175;i++);
*i2c_s1=0xc1; /* idle / sda,acl high / ack / serial on */
for(i=0;i!=175;i++);