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halibatsuiba
Joined: 12 Aug 2009
Posts: 30
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 Posted: Sun Sep 27, 2009 10:10 pm |
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| halibatsuiba wrote: |
Debugging continues...  |
Whadda'y'know...
I could not think of anything else to try so I built another board #2 to a brand new breadboard and...
It works!
I can send characters from terminal over RS232 to board #1, board #1 sends them over CAN bus to board #2 who, in turn, echoes them back to terminal via board #1.
[With voice of TV commercial]: "It works, It really works!"
Looks like there is two rows shorted in my old trusted currently-in-the-trashcan breadboard! 
Thank you, PCM, very much for your help in this issue. |
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ivrj
Joined: 17 Mar 2009
Posts: 7
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| Posted: Wed Oct 14, 2009 4:29 pm |
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I am also having the same problem.
My board #1 stops on:
| Quote: | | while(!can_kbhit()); |
I've modified the source to be easy to debug:
| Code: |
#include <18F2580.h>
#fuses HS, NOPROTECT, PUT, BROWNOUT, NOWDT, NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
#include <can-18F4580.c> // Use correct driver
#define BOARD1_ID 24
#define BOARD2_ID 25
// Uncomment this line to compile code for Board #1.
// Comment it out to compile for Board #2.
//#define BOARD1 1
//======================================
void main()
{
struct rx_stat rxstat;
int32 rx_id;
int32 tx_id;
int8 rx_len,i;
int8 buffer[8];
can_init();
// starting
for(i = 0; i < 13; i++)
{
output_toggle(pin_a1);
delay_ms(90);
output_toggle(pin_a0);
output_toggle(pin_a1);
delay_ms(90);
output_toggle(pin_a0);
}
output_low(pin_a0);
output_low(pin_a1);
delay_ms(400);
#ifdef BOARD1 // For Board #1
while(1)
{
printf("Press a key\r");
output_high(pin_a0);
buffer[0] = getc(); // Wait for a character
printf("lido:%s ", buffer[0]);
output_low(pin_a0);
// Transmit it to board #2.
if(can_putd(BOARD2_ID, buffer, 1, 1, 1, 0))
{
printf("Sending a msg\r");
for(i = 0; i < 6; i++)
{
output_toggle(pin_a0);
delay_ms(100);
}
output_low(pin_a0);
}
else
{
printf("Msg sending fail\r");
for(i = 0; i < 15; i++)
{
output_toggle(pin_a0);
delay_ms(50);
output_low(pin_a0);
}
}
buffer[0] = 0; // Clear the buffer byte
// Wait for the char to be echoed back.
while(!can_kbhit());
if(can_getd(rx_id, buffer, rx_len, rxstat))
{
printf("msg received\r");
for(i = 0; i < 10; i++)
{
output_toggle(pin_a1);
delay_ms(50);
}
output_low(pin_a1);
if(rx_id == BOARD1_ID) // Is it for this board ?
{
for(i = 0; i < 15; i++)
{
output_toggle(pin_a1);
delay_ms(50);
}
output_low(pin_a1);
printf("msg:" );
putc(buffer[0]); // If so, display the char
}
}
}
#else // For Board #2
while(1)
{
if(can_kbhit()) // Message available ?
{
for(i = 0; i < 6; i++) // blink a received led
{
output_toggle(pin_a0);
delay_ms(100);
}
output_low(pin_a0);
// If so, get the message.
if(can_getd(rx_id, buffer, rx_len, rxstat))
{
if(rx_id == BOARD2_ID) // Is it for this board ?
{
for(i = 0; i < 14; i++) // blink a received led
{
output_toggle(pin_a0);
delay_ms(50);
}
output_low(pin_a0);
// If so, echo back the character.
can_putd(BOARD1_ID, buffer, 1, 1, 1, 0);
}
}
}
}
#endif
} |
I just changed the oscilator from 20mhz to 4mhz.
I still have some doubts on the circuit, can somebody post the real circuit schematic?
Just to show my circuit:
is something wrong with him? |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Oct 14, 2009 5:18 pm |
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It worked for me. I changed the software in the 18F2580 test code,
http://www.ccsinfo.com/forum/viewtopic.php?t=40202&start=22
so that the #use delay() was 4 MHz instead of 20 MHz.
Check your connections and make sure you compiled the software
separately for board #1 and board #2. Make sure you know how
to do that. Make sure your RS232 cable is connected to board #1. |
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ivrj
Joined: 17 Mar 2009
Posts: 7
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| Posted: Thu Oct 15, 2009 8:09 am |
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| PCM programmer wrote: | It worked for me. I changed the software in the 18F2580 test code,
http://www.ccsinfo.com/forum/viewtopic.php?t=40202&start=22
so that the #use delay() was 4 MHz instead of 20 MHz.
Check your connections and make sure you compiled the software
separately for board #1 and board #2. Make sure you know how
to do that. Make sure your RS232 cable is connected to board #1. |
I get other 2 20mhz crystal, changed back to the original code and changed delay to 20000000, but isn't working.
| PCM programmer wrote: | Does your schematic represent real hardware ? Because, there is no
MCLR circuit. There are no 100 nF ceramic caps on the Vdd pins on any
chip. Also, I would jumper the Rs pins on the MCP2551 chips to ground
for the inital tests.
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where I connect the 100nF ceramic capacitors? |
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ivrj
Joined: 17 Mar 2009
Posts: 7
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| Posted: Thu Oct 15, 2009 8:19 am |
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Error found!
I crossed the can-l can-h lines!
now it´s working fine!
Thank u PCM!!!! |
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takyonxxx
Joined: 11 Mar 2011
Posts: 1
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| MCP2551 ISIS LIBRARY |
| Posted: Fri Mar 11, 2011 7:47 am |
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HELLO..
I NEED MCP2551 ISIS LIBRARY, I SAW FROM THE PICTURE THAT YOU USE IT ON PROTEUS. PLEASE I NEED IT. MAY YOU SEND IT TO ME?
OR GIVE ME A LINK.
THANKS... |
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