asrock
Junior Member level 3
hello ...
simply i use 16f877 and keypad 4*3 for just display on lcd the num pressed.
and this is keypad:
https://dlnmh9ip6v2uc.cloudfront.net/images/products/Keypad1-L.jpg
and my compiler i use is :mikroc pro for pic
and my project is successfully working in proteus >>> but in actual connection the lcd not display the correct number what i press!!!!
i connect the keypad to portD like that:
pin1>>>>RD0.....to 10k the GND
pin2>>>>RD1.....to 10k the GND
pin3>>>>RD2.....to 10k the GND
pin4>>>>RD3
pin5>>>>RD4
pin6>>>>RD5
pin7>>>>RD6
so is my hardware connection wrong !!?
=============
and my code here:
any one have solution about this... ?
simply i use 16f877 and keypad 4*3 for just display on lcd the num pressed.
and this is keypad:
https://dlnmh9ip6v2uc.cloudfront.net/images/products/Keypad1-L.jpg
and my compiler i use is :mikroc pro for pic
and my project is successfully working in proteus >>> but in actual connection the lcd not display the correct number what i press!!!!
i connect the keypad to portD like that:
pin1>>>>RD0.....to 10k the GND
pin2>>>>RD1.....to 10k the GND
pin3>>>>RD2.....to 10k the GND
pin4>>>>RD3
pin5>>>>RD4
pin6>>>>RD5
pin7>>>>RD6
so is my hardware connection wrong !!?
=============
and my code here:
Code:
sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB4_bit;
sbit LCD_D5 at RB5_bit;
sbit LCD_D6 at RB6_bit;
sbit LCD_D7 at RB7_bit;
sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB4_bit;
sbit LCD_D5_Direction at TRISB5_bit;
sbit LCD_D6_Direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;
char keypadPort at PORTD;
int kp;
void main() {
Keypad_Init();
Lcd_Init(); // Initialize Lcd
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
while (1) {
kp = Keypad_Key_Press();
switch (kp) {
case 1: kp = 49; break; // 1 // Uncomme
case 2: kp = 50; break; // 2
case 3: kp = 51; break; // 3
case 4: kp = 65; break; // A
case 5: kp = 52; break; // 4
case 6: kp = 53; break; // 5
case 7: kp = 54; break; // 6
case 8: kp = 66; break; // B
case 9: kp = 55; break; // 7
case 10: kp = 56; break; // 8
case 11: kp = 57; break; // 9
case 12: kp = 67; break; // C
case 13: kp = 42; break; // *
case 14: kp = 48; break; // 0
case 15: kp = 35; break; // #
case 16: kp = 68; break; // D
}
Lcd_Chr(1, 10, kp); // Print key ASCII value on Lcd
}
}
any one have solution about this... ?