LCD_RS equ rb6 ; LCD register select.
I_SELDSP equ rb5 ; Display mode select SW.
I_EXTPSC equ rb4 ; External prescaler select SW.
I_INTPS1 equ rb3 ; External prescaler select SW #1.
I_INTPS0 equ rb2 ; External prescaler select SW #0.
I_SELRS1 equ rb1 ; Resolution select SW #1.
I_SELRS0 equ rb0 ; Resolution select SW #0.
; ----- Constants.
FRES_1 equ 0 ; Resolution mode = 1 Hz.
FRES_10 equ 1 ; 10 Hz.
FRES_100 equ 2 ; 100 Hz.
FRES_1000 equ 3 ; 1 kHz.
DSP_FREQ equ 0 ; Display mode = frequency.
DSP_LENG equ 1 ; wave length. (X.XXX m)
IPSC_1 equ 0 ; Internal prescaler = 1:1.
IPSC_4 equ 1 ; 1:4.
IPSC_8 equ 2 ; 1:8.
IPSC_16 equ 3 ; 1:16.
TMR0_1 equ 00101000b ; Prescaler rate for TMR0 = 1:1.
TMR0_4 equ 00100001b ; 1:4.
TMR0_8 equ 00100010b ; 1:8.
TMR0_16 equ 00100011b ; 1:16.
XPSC_OFF equ 0 ; External prescaler = disabLED.
XPSC_ON equ 1 ; enabled.
XPSC_RATE equ 64 ; External prescaler rate.
MAXDIGIT equ 10 ; Max digit = "XXXXXXX.XXX".
; ----- LCD functions.
L_SELDR equ 0 ; LCD data register select.
L_FNCSET equ 00101000b ; LCD function set.
L_ENTSET equ 00000110b ; LCD entry mode set.
L_DSPCLR equ 00000001b ; LCD display clear.
L_DSPOFF equ 00001000b ; LCD display OFF.
L_DSPON equ 00001100b ; LCD display ON.
L_CSHOME equ 00000010b ; LCD cursor position reset.
L_DDFREQ equ 10000000b+01h ; LCD "Frequency" DD RAM addr.
L_DDMODE equ 10000000b+4Ch ; LCD "Mode" DD RAM addr.
L_DDINP1 equ 10000000b+40h ; LCD "Input" DD RAM addr1.
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本文关键字：单片机 PIC单片机，单片机-工控设备 - PIC单片机
