kod za one kojima je potreban delay za 4MHz.
ovaj kod zapamtite kao delay.h
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/*
* Delay functions for HI-TECH C on the PIC
*
* Functions available:
* DelayUs(x) Delay specified number of microseconds
* DelayMs(x) Delay specified number of milliseconds
*
* Note that there are range limits: x must not exceed 255 - for xtal
* frequencies > 12MHz the range for DelayUs is even smaller.
* To use DelayUs it is only necessary to include this file; to use
* DelayMs you must include delay.c in your project.
*
*/
/* Set the crystal frequency in the CPP predefined symbols list in
HPDPIC, or on the PICC commmand line, e.g.
picc -DXTAL_FREQ=4MHZ
or
picc -DXTAL_FREQ=100KHZ
Note that this is the crystal frequency, the CPU clock is
divided by 4.
* MAKE SURE this code is compiled with full optimization!!!
*/
#ifndef DelayUs //-- Stop Multipule entrys of this code!!!
#ifndef XTAL_FREQ
#define XTAL_FREQ 4MHZ /* Crystal frequency in MHz */
#endif
#define MHZ *1000 /* number of kHz in a MHz */
#define KHZ *1 /* number of kHz in a kHz */
#if XTAL_FREQ >= 12MHZ
#define DelayUs(x) { unsigned char _dcnt; \
_dcnt = (x)*((XTAL_FREQ)/12MHZ); \
while(--_dcnt != 0) \
continue; }
#else
#define DelayUs(x) { unsigned char _dcnt; \
_dcnt = (x)/(12MHZ/(XTAL_FREQ))|1; \
while(--_dcnt != 0) \
continue; }
#endif
extern void DelayMs(unsigned char);
#endif
---------------------
a ovaj kao delay.c
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/*
* Delay functions
* See delay.h for details
*
* Make sure this code is compiled with full optimization!!!
*/
#include "delay.h"
void
DelayMs(unsigned char cnt)
{
#if XTAL_FREQ <= 2MHZ
do {
DelayUs(996);
} while(--cnt);
#endif
#if XTAL_FREQ > 2MHZ
unsigned char i;
do {
i = 4;
do {
DelayUs(250);
} while(--i);
} while(--cnt);
#endif
}
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mst
problem sa HI-TECH C compilerom
Re: problem sa HI-TECH C compilerom
Re: problem sa HI-TECH C compilerom
Re: problem sa HI-TECH C compilerom
Re: problem sa HI-TECH C compilerom