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AllDigital
Config PORTC = Output

configuration:
Symbol enablepin = PORTC.0
Symbol clockpin = PORTC.1
Symbol datapin = PORTC.2

declarations:
Dim i As Byte
Dim lcdi As Byte
Dim lcdbyte As Byte
Dim lcdbytetosend As Byte
Dim rs As Bit
Dim flag As Byte
Dim mask As Byte

init:
Gosub initialiselcd

loop:
lcdbytetosend = 32
Gosub writelcddata
lcdbytetosend = “H”
Gosub writelcddata
lcdbytetosend = “e”
Gosub writelcddata
lcdbytetosend = “l”
Gosub writelcddata
lcdbytetosend = “l”
Gosub writelcddata
lcdbytetosend = “o”
Gosub writelcddata
lcdbytetosend = 32
Gosub writelcddata
lcdbytetosend = “W”
Gosub writelcddata
lcdbytetosend = “o”
Gosub writelcddata
lcdbytetosend = “r”
Gosub writelcddata
lcdbytetosend = “l”
Gosub writelcddata
lcdbytetosend = “d”
Gosub writelcddata
lcdbytetosend = “!”
Gosub writelcddata

WaitMs 4000
lcdbytetosend = 0x01 ‘clear screen
Gosub writelcdcommand

WaitMs 2000

Goto loop
End


writelcdnibble:
Low enablepin
Low clockpin
If rs = 1 Then High datapin Else Low datapin

Gosub toggleclockpin

‘shift in 4 bits
mask = 8
For lcdi = 1 To 4
flag = lcdbyte And mask
If flag = 0 Then Low datapin Else High datapin
Gosub toggleclockpin
mask = ShiftRight(mask, 1)
Next lcdi

‘now strobe the clock one more time because ST+SC are tied
Gosub toggleclockpin

‘toggle the enable pin to “flush” the data into the lcd
Low datapin
High enablepin
Low enablepin

Return


toggleclockpin:
‘toggle the clock pin
High clockpin
Low clockpin
Return


writelcddata:
rs = 1
Gosub senddata
Return


writelcdcommand:
rs = 0
Gosub senddata
Return


senddata:
lcdbyte = ShiftRight(lcdbytetosend, 4)
Gosub writelcdnibble
lcdbyte = lcdbytetosend And 15
Gosub writelcdnibble
Return


initialiselcd:
For i = 1 To 3
WaitMs 50
lcdbytetosend = 0x20
Gosub writelcdcommand
Next i

WaitMs 50
lcdbytetosend = 0x28 ‘4 bits, 2 lines, 5×7 font
Gosub writelcdcommand

WaitMs 50
lcdbytetosend = 0x0c ‘display on, no cursors
Gosub writelcdcommand

WaitMs 50
lcdbytetosend = 0x06 ‘entry mode auto-increment
Gosub writelcdcommand

WaitMs 50
lcdbytetosend = 0x01 ‘clear screen
Gosub writelcdcommand

Return

 

lcd touch panel suppliers Production Line
After years of development, in order to better integrate the company’s resources and provide customers with the most advantageous products, in 2016, all the Shenzhen production lines were relocated to Yongzhou, Hunan province. At present, Shenzhen office and Hunan factory have a total of more than 500 employees, with more than 20,000 square meters of standard clean plant.
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