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Code:
WaitMs 1000
'Khoi tao LCD
Define LCD_LINES = 2
Define LCD_CHARS = 16
Define LCD_BITS = 4
Define LCD_DREG = PORTB
Define LCD_DBIT = 0
Define LCD_RSREG = PORTA
Define LCD_RSBIT = 1
Define LCD_EREG = PORTA
Define LCD_EBIT = 3
Define LCD_RWREG = PORTA
Define LCD_RWBIT = 2
Lcdinit
'Khai bao bien
Dim x As Byte
Dim y As Byte
Dim g1 As Byte
Dim g2 As Byte
Dim g3 As Byte
Dim g4 As Byte
Dim a1 As Byte
Dim a2 As Byte
Dim b1 As Byte
Dim b2 As Byte
Dim c1 As Byte
Dim c2 As Byte
a1 = 0
a2 = 0
b1 = 0
b2 = 0
c1 = 0
c2 = 0
x = 00
y = 00
main:
Lcdcmdout LcdClear
g1 = x / 10
g2 = x % 10
g3 = y / 10
g4 = y % 10
If x >= 24 Then
x = 0
Endif
If y >= 60 Then
y = 0
Endif
If a1 = g1 And a2 = g2 And b1 = g3 And b2 = g4 Then
PORTA.0 = 1
Else
PORTA.0 = 0
Endif
c2 = c2 + 1
If c2 > 9 Then
c2 = 0
c1 = c1 + 1
Endif
If c1 > 5 Then
c1 = 0
b2 = b2 + 1
Endif
If b2 > 9 Then
b2 = 0
b1 = b1 + 1
Endif
If b1 > 5 Then
b1 = 0
a2 = a2 + 1
Endif
If a2 > 9 Then
a2 = 0
a1 = a1 + 1
Endif
If a1 >= 2 And a2 >= 4 Then
a2 = 0
a1 = 0
Endif
Lcdout #a1, #a2, ":", #b1, #b2, ":", #c1, #c2, " ", #x, ":", #y
Lcdcmdout LcdLine2Home
Lcdout "Digital clock "
WaitMs 998
Goto main
End
On Interrupt
WaitUs 100
If PORTB.6 = 1 Then
a2 = a2 + 1
Endif
If PORTB.4 = 1 Then
b2 = b2 + 1
Endif
If PORTB.7 = 1 Then
x = x + 1
Endif
If PORTB.5 = 1 Then
y = y + 1
Endif
INTCON.RBIF = 0
Resume
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