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odt133
Joined: 27 May 2016
Posts: 1
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| printf print broken message |
 Posted: Fri May 27, 2016 2:55 am |
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Hello,
Could anybody tell me what I did wrong?
I'm trying to use printf(). but not working properly.
Source code is like this.
| Code: | #include "C:\Program Files (x86)\picc\devices\18F6520.h"
#use delay(clock=40000000)
#USE RS232(uart1, baud=9600, bits=8, parity=n)
#fuses H4,OSCSEN,BROWNOUT,BORV27,NOWDT,NOPROTECT,CCP2E7//config set1
void main( void )
{
while( true )
{
printf("led on.\r\n");
output_high( pin_f7 );
delay_ms(1000);
printf("led off.\r\n");
output_low( pin_f7 );
delay_ms(1000);
}
} |
and result from Tera Term is like this.
| Code: | ?幢
슊+?幢
+?幢
슊+?幢
+?
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As you see, character is broken. I set tera term's baudrate as 9600.
What did I wrong? Please,,
Thank you in advance. |
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kWoody_uk
Joined: 29 Jan 2015
Posts: 47
Location: United Kingdom
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| Posted: Fri May 27, 2016 4:04 am |
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Check the basics:-
Is the LED flashing at the correct rate?
Keith |
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RF_Developer
Joined: 07 Feb 2011
Posts: 839
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| Posted: Fri May 27, 2016 4:47 am |
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| kWoody_uk wrote: |
Is the LED flashing at the correct rate?
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Almost certainly not. The order of things is not right. Should be device.h, fuses, delay, then rs232 and the like (timers etc), then do user code.
| Code: | #include <18F6520.h> // Use <> and select the right path in the project.
// Fuses MUST come before delay and use rs232, and they must come after the processor include. I have not checked these fuses are sensible.
#fuses H4,OSCSEN,BROWNOUT,BORV27,NOWDT,NOPROTECT,CCP2E7//conf
#use delay(clock=40000000)
// Use rs232 must come after use delay.
#USE RS232(uart1, baud=9600, bits=8, parity=n)
// Then other stuff.
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temtronic
Joined: 01 Jul 2010
Posts: 9163
Location: Greensville,Ontario
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| Posted: Fri May 27, 2016 11:06 am |
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also there needs to be a 'MAX232', TTL<>USB' or similar interface between PIC and PC.
Jay |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19338
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| Posted: Fri May 27, 2016 11:27 am |
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| and (of course) to give 40MHz, the crystal needs to be 10MHz. Back to 'does the LED flash at the correct rate'. |
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