Nisar
Joined: 16 Nov 2007
Posts: 20
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| Two Seven segment and two Switch |
 Posted: Sun Mar 15, 2009 1:23 pm |
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Hello everybody
I want to increment by one is executed continuously only when S1 switch is pressed. When the switch is released, the increment stops. When S2 switch is pressed, it initiates a decrement continuously by one. Using two seven segment and two switch. S1 and S2 are connected on PIC16F877 PortB pins RB1 and RB2. Plz help me.
My C Code for continuously counting from 00 to 99 are here
| Code: |
#include<16f877.h>
#fuses XT,NOLVP,NOWDT,PUT
#use delay (clock=4000000) // defind crystal = 4MHz
#byte port_d=8
#byte port_a=5
byte CONST LED_MAP[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0X80,0x90};
//===========================================
// this function use to display number 00=99
// input : n = number to display
//===========================================
void display_number(int n)
{
output_d(LED_MAP[n/10]);//tens position;n=0 to 9
output_low(PIN_A1);
delay_ms(2);
output_high(PIN_A1);
output_d(LED_MAP[n%10]) ;//unit position
output_low(PIN_A0);
delay_ms(2);
output_high(PIN_A0);
}
//============================================
// main program
//============================================
void main()
{
int i,count=1;
while(TRUE)
{
for (i=0;i<=200;i++)
display_number(count); // dispay 200 times
count=(count==99) ? 1: count+1;//count+1=++count
}
} |
Thanks
Nisar |
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