代码搜索：如何学习 PWm？
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www.eeworm.com/read/287808/8668124
s pwm.s
.module pwm.c
.area text(rom, con, rel)
.dbfile D:\NEW\ECHO\pwm.c
.dbfunc e pwm_40KHz _pwm_40KHz fV
; i -> R20
; n -> R16
.even
_pwm_40KHz::
xcall push_gset1
www.eeworm.com/read/287808/8668130
_h pwm._h
#ifndef PWM_H
#define PWM_H
#ifdef PWM_C
void pwm_40MHz( unsigned char n);//40MHz SHOUT PULSE
void pwm_30MHz( unsigned char n);
void pwm_20MHz( unsigned char n);
#else
extern void pwm_40MHz( u
www.eeworm.com/read/287808/8668160
i pwm.i
www.eeworm.com/read/287808/8668196
o pwm.o
XL
H 1 areas 5 global symbols
M pwm.c
S push_gset1 Ref0000
S pop_gset1 Ref0000
A text size A8 flags 0
dbfile D:\NEW\ECHO\pwm.c
dbfunc e pwm_40KHz 0 fV
dbsym r i 14 c
dbsym r n 10 c
dbline FF
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_c pwm._c
#define PWM_C
#include "includes.h"
void pwm_40MHz( unsigned char n)
{
unsigned char i;
for( ;n>0;n--)
{
PORTB=0xff;
for(i=5;i>0;i--)
{
asm("nop");
}
www.eeworm.com/read/431480/8674718
c pwm.c
#include
#include"pwm.h"
//使用MCLOCK时钟8MHz产生可调频率和站空比的方波，
//频率：8M/f
//占空比：c/f
www.eeworm.com/read/431480/8674730
h pwm.h
#ifndef pwm_h
#define pwm_h
#include"pwm_timer_b.h"
#include"setclock.h"
#include"7290.h"
#include"lcd.h"
char get_num(uchar key);
void Pwm();
void pwm_init();
#endif