SPI not working on 18F26J50

[Jim Oram]

Hi Ttelmah,

Thank you for making it clear about the relation between spi and uart1.
I have made sure your directives are implemented.

But it seems that I am making very large strides backward.
Now when I program the 18F26J50 chip (via ICSP) .. it programs ok, no errors, but the chip does not come up and run.

So I back tracked to code that blinked the LEDs and that does nothing.
I figured the chip went bad so I installed a new chip.
Same thing. Programs but does not do anything, not even blink the LEDs.

I checked the PCB thinking something came loose, seems ok.

Somehow I must find out what went wrong ... will get back to you when I can at least blink an LED.

Thanks Kindly, for all your help, you are most appreciated.
more on all this later when I get it fixed,
Jim
_________________
Jim Oram

[Jim Oram]

++++++++++++++++++++++++++
Jim, please learn to use Code blocks. Mod is tired of doing it for you.

Highlight code lines with mouse.
Press Code button.
Preview to check it, and post.

Edit this post and add Code block.

- Forum Moderator
++++++++++++++++++++++++++

Ttelmah,
Your suggestions have bee implimented with appreciation.
For debugging I added some LED indicators so I could trace the code on my PCB.
It appears to hang up on the fputc() function.

#case
#include <18F26J50.h>
#FUSES NOWDT,NOPROTECT,INTRC
#use delay(clock=8000000)
#define GRNLED PIN_B6
#define REDLED PIN_B7

#pin_select TX2=PIN_C0 // I/O pin assignment:
#pin_select RX2=PIN_C1 // use Uart 2 connect to PIN_C0 and C1

#use rs232 (baud=4800,parity=N,UART2,bits=8,errors,stream=COMM2)

char x;

void main(){
setup_uart(FALSE); //needs to be here.
setup_spi(SPI_MASTER | SPI_L_TO_H | SPI_CLK_DIV_16);

while(TRUE){
output_high(GRNLED); // green led off
output_low(REDLED); // indicate start fputc() RED on
fputc('1',COMM2); // fputc to COMM2 .... HANGS HERE
output_low(GRNLED); // indicate char sent, end fputc()
output_high(REDLED); // RED off
delay_ms(2000);
output_high(GRNLED); // GREEN off

output_low(REDLED); // indicate start fprintf()
fprintf(COMM2," hello CCS\r\n");
output_low(GRNLED); // indicate end fprintf()
output_high(REDLED); // RED off
delay_ms(2000);
output_high(GRNLED);

output_low(REDLED); // indicate start spi_write()
spi_write('X'); // write X to to the SPI pin 18. HANGS !
output_high(REDLED); // RED off
delay_ms(2000);
output_low(GRNLED); // indicate end spi_write()
delay_ms(5000);
}
}

Your suggestions are very much desired...
This is wearing me out... :-)

Thank You very Kindly,
Jim
_________________
Jim Oram

[Jim Oram]

Moderator: ok, I will highlight the 'code' and press the code button as instructed. Hope it works.

Ttelmah,
Somehow I got the board working again.
Your suggestions have been implimented with appreciation.
For debugging I added some LED indicators so I could trace the code on my PCB.
It appears to hang up on the fputc() function.

[Jim Oram]

Ttelmah,
I kept hammering on this code until it works now.
Some things look strange in the code ,,, but it works, sending data at 4800 baud to the Comm Operator program and sending data via SPI to the digital storage scope. Thanks to you and everybody at the forum, with your guidance it now works.