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CCS Forum Index -> General CCS C Discussion

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ckielstra

Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

Posted: Wed Dec 13, 2006 1:21 pm

Quote:

I cannot get the code to compile. I cannot get anything to work.

You sound desperate...
I feel a bit sorry for you so here is a complete program:

Code:

#include <16F877A.h>
#fuses XT, NOWDT, NOLVP
#device *=16
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

#use fast_io(c)
#use fast_io(d)

#define SPI_MODE_0_0 (SPI_L_TO_H | SPI_XMIT_L_TO_H)
#define SPI_MODE_0_1 (SPI_L_TO_H)
#define SPI_MODE_1_0 (SPI_H_TO_L)
#define SPI_MODE_1_1 (SPI_H_TO_L | SPI_XMIT_L_TO_H)

#define LF 10
#define CR 13

union combine {
int32 word;
int8 b[4];
};

#byte PORTC=0x7
#bit SDI=PORTC.4
//will need a bit defintion here for CS
#byte PORTD=0x8
#bit CS=PORTD.0

int32 read3551(void)
{
union combine temp;

//drop CS
CS=0;
delay_cycles(1);
CS=1;
delay_cycles(1);
//At this point conversion has been triggered.
CS=0;
delay_us(1);
//wait for conversion to complete
while (SDI==1) {
CS=1;
delay_cycles(1);
CS=0;
}
//Now read data.
temp.b[2]=spi_read(0);
temp.b[1]=spi_read(0);
temp.b[0]=spi_read(0);
temp.b[3]=0;
CS=1;
return temp.word;
}

void main()
{
int8 i;
int32 value;

set_tris_c(0b10010000); // C3 = CLK out, C4 = SDI, C6=XMIT, C7=RCV
set_tris_d(0b00000000); // D0 = CS

CS=1; //Start with CS high
setup_spi(SPI_MASTER | SPI_MODE_1_1 | SPI_CLK_DIV_4 );

puts("Initialized"); //Output string for debug
while(TRUE)
{
value = read3551();

for (i = 32; i>0; i--)
{
putc(bit_test(value, i-1) + '0');
}
putc(CR);
putc(LF);

delay_ms(5000);
}
}

Quote:

I do not have the means to provide a schematic.

Sorry, but that's not enough. Use your imagination!
You must know someone with a scanner, digital camera or even a phone-camera so you can create a digital print of the schematic. Or use Microsoft paint, or whatever. Then post the digital picture on your own website or a free site like www.flickr.com and send us the link.

I'm especially interested in what and how everything is connected to the other 5 pins of the A/D converter (including pin numbers !)

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