Hast du ein 1-bzw 2-zeiliges Display ? (weil du E2 offenbar nicht brauchst)
Ich hab versucht, bei den relevanten die Bits/Pins entsprechend zu tauschen.
Die geänderten Zeilen hab' ich markiert und die ursprünglichen Zeilen als Kommentar stehen lassen.
Ehrlich gesagt, bei ein paar trickreichen Commands blick' ich im moment nicht ganz durch. Daher logo keine Gewähr
Code:
copyright = Kent Andersson
www = none
email = kent@smmab.se
comment = I2C LCD driver
libversion = 1.02
date = 31 march 2002
statement = You are free to use this code any way you like, if you are able to optimize
statement = it better, please send me an update on my e-mail.
history = No known bugs.
;define a constant named PCF8574_LCD pointing to the I2C address
;dimension _lcd_e as byte to control the E-lines (4 lines LCD:s)
;_lcd_e should have one of the following values
;128 to enable E1, 64 to enable E2, 192 to enable both E1 and E2 (cls, deflcdchar)
;Connect the following pins from PCF8574 to LCD
;
; ================= original ======
;P0 - D4
;P1 - D5
;P2 - D6
;P3 - D7
;P4 - RS
;P5 - RW (not used, set to 0 to ground for write)
;P6 - E2 (on 1 or 2 line display nc)
;P7 - E1
; ================= FUNKHELD ======
;P0 - D4
;P1 - D5
;P2 - D6
;P3 - D7
;P4 - E1
;P5 - RW (not used, set to 0 to ground for write)
;P6 - RS
;P7 - nc
[_Init_LCD]
_Init_LCD:
*BASIC: waitms 50
;-----------------------------------------------------------------
;ldi r16,&hc0 ; this is to make the initialization on both halfs of a 4-line LCD E1 + E2
;------------------------picnick-----------------------------------------
ldi r16,&h10 ; this is to make the initialization on both halfs of a 4-line LCD
;-----------------------------------------------------------------
Ldi _temp1, &h03 ; at init-time I call all routines before _lcd_e is loaded into r16
Rcall _Send_to_LCD
*BASIC: waitms 4
Rcall _Send_to_LCD
Rcall _Send_to_LCD
Ldi _temp1, &h02
Rcall _Send_to_LCD
Ldi _temp1, &h28 RW + 8
Rcall _Write_lcd_byte ;RS flag should to be 0, so jump directly to write byte
;-----------------------------------------------------------------
;Ldi _temp1, &h08
;------------------------picnick-----------------------------------------
Ldi _temp1, &h40
;-----------------------------------------------------------------
Rcall _Write_lcd_byte
Ldi _temp1, &h0c
Rcall _Write_lcd_byte
Ldi _temp1, &h01
Rjmp _Write_lcd_byte
[END]
[_Write_lcd]
_Write_lcd:
* lds r16,{_lcd_e}
;-----------------------------------------------------------------
!sbr r16,&h10 ;set RS flag (4 high bits is used as control) RS
;------------------------picnick-----------------------------------------
sbr r16,&h40 ;set RS flag (4 high bits is used as control) RS 0x40
;-----------------------------------------------------------------
rjmp _write_lcd_byte
_Lcd_Control:
* lds r16,{_lcd_e}
_write_lcd_byte:
push r24
Swap _temp1
Rcall _Write_lcd_Nibble
pop r24
_Write_lcd_nibble:
Cbr _temp1,&HF0 ; E1, E2, RW, RS low
_Send_to_LCD:
push r26
push r27
ldi r25,3
_send_3_times:
*BASIC: i2csend pcf8574_LCD,_temp1
eor _temp1,R16 ; Xor E1 and/or E2 to set them
; @genus(250)
ldi r26,0
_LCD_delay:
dec R26
brne _LCD_delay
Dec R25
Brne _send_3_times
eor _temp1,R16 ; Xor to restore to initial state (even number of times)
pop r27
pop r26
ret
[END]
Ich hab nicht gesehen, ob und wie der Herr Andersson
"_temp1" festlegt ?
Du weisst eh, dass du irgendwo
CONST PCF8574_LCD = i2c-addresse
und
DIM _lcd_e AS BYTE ' das Byte, das du schreiben willst
definieren musst ?
('tschuldige, wenn das eine überflüssige Frage ist )
Lass mich hören, ob das funzt oder ob das LCD verdampft ist *g*
@Richard offenbar will funkheld das LCD über den PCF betreiben und nicht 8 Pins verbraten. Scheint mir nicht aussergewöhnlich. Aber dadurch sind die Bascom -Einstellungen natürlich sinnlos
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