參數(shù)資料
型號(hào): PICDEM2
廠商: Microchip Technology Inc.
英文描述: simple board
中文描述: 簡(jiǎn)潔的主板
文件頁(yè)數(shù): 44/60頁(yè)
文件大?。?/td> 1037K
代理商: PICDEM2
2001 Microchip Technology Inc.
DS30374D-page 39
LCD Demo
6.2.3.
DEC_TABL Routine (kbd8bit.asm)
This routine is basically a look-up table that returns the ASCII value of the
received keypress.
6.2.4.
LCDInit Routine (lcd8bit.asm)
This routine initializes the LCD module.
Figure 6.9: LCD Initialization Routine
6.2.5.
SetupDelay Routine (lcd8bit.asm)
This routine is basically a decrementing variable loop. The variable is
initialized with a value and then decremented in a loop until it reaches zero
value. Then it jumps out of the loop and returns to the calling routine.
6.2.6.
SendCmd Routine (lcd8bit.asm)
This routine sends a command to the LCD.
6.2.7.
BusyCheck Routine (lcd8bit.asm)
This routine checks the LCD busy flag. It returns only when not busy.
6.2.8.
SendChar Routine (lcd8bit.asm)
This routine sends a character to the LCD.
8-bit interface
Display on, cursor on
Clear display
Set entry mode inc, no shift
Address DDRAM upper left
Send commands to LCD (SendCmd)
Return
Configure PORTA
Configure PORTD
Power-up and Set-up Sequence
(SetupDelay)
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