This is I do of square wave generator, to square wave output 5 k to 25 k, adjustable frequency and duty ratio, but still not achieve them, ask bosses help.

The code is as follows:
#include
# define uchar unsigned char
# define uint unsigned int
Float f=12000000;
P1 sbit KEY1=^ 0;
P1 sbit KEY2=^ 1;
Sbit KEY3=p ^ 2;
P1 sbit KEY4=^ 3;
Sbit OUTPUT=P2 ^ 0;
Uchar ZKB;
Uint freq.
Uchar TIMER0_L TIMER0_H, TIMER1_L TIMER1_H;

Void delay (uchar n)
{
Uchar I;
While (n -)
{the for (I=255; I> 0; I -)
{}
}}

Void SysInit (void)
{
P1=0 x0f;
Freq=5000;
ZKB=50;
TIMER0_L=0 xe0-0xfc;
TIMER0_H=0 xb1;
TIMER1_L=0 xf0;
TIMER1_H=0 xd8;
TL0=0 xe0-0xfc;
TH0=0 xb1;
TL1=0 xf0;
TH1=0 xd8;
TMOD=0 x11;
IT0=1;
EX0=1;
ET0=1;
ET1=1;
EA=1;
TR0=1;
TR1=1;
}

Void main (void)
{
SysInit ();
While (1)
{}
}

Void Timer0_freq () interrupt 1
{
TR1=1;
TL0=TIMER0_L;
TH0=TIMER0_H;
The OUTPUT=1;
}

Void Timer1_zkb () interrupt 3
{
TR1=0;
TL1=TIMER1_L;
TH1=TIMER1_H;
The OUTPUT=0;
}

Void Keyscan () using interrupt 0 1
{
Float TF0 TZ1;
EX0=0;
Delay (1);
If (P1!=0 x0f)
{
If (KEY1==0) freq +=1000;
If (KEY2==0) freq +=100;
If (KEY3==0) ZKB +=10;
If (KEY4==0) ZKB +=1;
If (freq> 25000) freq=5000;
If (zkb> 100) ZKB=10;
TF0=(65536 - f/(12 * freq));
TZ1=(65536 - (f * ZKB)/(12 * 100 * freq));
TIMER0_H=(uint) TF0/256;
TIMER0_L=(uint) TF0%256;
TIMER1_H=(uint) TZ1/256;
TIMER1_L=(uint) TZ1%256;
}
P1=0 x0f;
EX0=1;
TR0=1;
TR1=1;
}

CodePudding user response:

TIMER0_H=(uint) TF0/256;
This casts, my image is, the compiler will not do transformation, but the original variables as you directly to the specified type to use, don't know whether I understand is wrong, if, as I understand it, you won't get the right result,

CodePudding user response:

I'm sorry, if my understanding is wrong, the compiler will transform,