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zilog
Joined: 17 Aug 2007
Posts: 19
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| basic hello world fails with 3.249 compiler and pic18f6722 |
 Posted: Sat Aug 18, 2007 7:25 am |
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As the topic states, the simple example below fails using CCS 3.249 with a PIC18F6722. It seems like the oscillator doesnt start at all (this MCU ran with this compiler before, using other code, so the MCU itself should be fine). What have I done wrong?
| Code: |
#include <18F6722.h>
#pragma case
#device HIGH_INTS=TRUE
//#device ICD=TRUE
#priority EXT3, TIMER2, TIMER1, RB
#fuses H4, NOWDT, STVREN, NOXINST, NODEBUG, NOXINST
#define PLL40
#ifdef PLL40
#use delay (clock=40000000)
#else
#use delay (clock=10000000)
#endif
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| Code: |
#include "styrkort.h"
#use fast_io(F)
void main(void)
{
unsigned int8 underVoltage;
while (1) {
output_high(PIN_D1);
delay_ms(1);
output_low(PIN_D1);
delay_ms(1);
}
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Ken Johnson
Joined: 23 Mar 2006
Posts: 197
Location: Lewisburg, WV
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| Posted: Sat Aug 18, 2007 8:07 am |
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If you use fast_io, you must set the tris register to make the pin an output. Currently it's an input, so you won't see it toggle, even though your code is running.
Ken |
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zilog
Joined: 17 Aug 2007
Posts: 19
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| Posted: Sat Aug 18, 2007 8:16 am |
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| Ken Johnson wrote: | If you use fast_io, you must set the tris register to make the pin an output. Currently it's an input, so you won't see it toggle, even though your code is running.
Ken |
The F-bank is fast, D is not. |
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Ttelmah
Guest
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| Posted: Sat Aug 18, 2007 9:03 am |
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Are you uing a low voltage programmer?. If not, you need NOLVP, or if the lines for this are floating, the chip may not start.
Best Wishes |
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