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mj
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| 0x80 sent from PIC--nothing else |
 Posted: Wed Sep 05, 2007 3:51 pm |
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When I send a variety of characters/values/etc from the PIC to the UART, my terminal program (RealTerm) only receives "80" (hex) regardless of what char/value/etc I send. I've done a search on the forums to see if this has been asked before and couldn't find anything; my apologies if it has been.
Code:
| Code: |
#include <18f4550.h>
#use delay (clock = 8000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
int8 data_int8;
char data_char;
byte data_byte;
void main()
{
while(1)
{
data_int8 = 'A';
data_char = 'A';
data_byte = 'A';
delay_ms(20);
puts(data_int8);
puts(data_char);
puts(data_byte);
printf(" %d", data_char);
printf(" %d", data_int8);
printf(" %d", data_byte);
output_high(pin_b0);
delay_ms(200);
output_low(pin_b0);
delay_ms(200);
}
}
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I have an ISR for RDA in there, but commented it out to troubleshoot. You can see my troubleshooting path (playing with the variable type); any ideas why I would only get 0x80?
BTW, my pin_B0 is just my 'heartbeat' sanity check that the PIC is running properly.
Thanks much. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Sep 05, 2007 4:03 pm |
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1. Don't use puts(). It requires a string, and you're giving it a byte
variable. Use putc() instead of puts().
2. The three data types, int8, char, and byte, are the same thing in CCS.
3. Post your #fuses statement. It should be placed on the next line
after the #include statement.
4. What baud rate, etc., is your terminal program set up to use ?
5. What is your terminal program ? |
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