8051F340 Serial LCD issues

[Cory Harkins]

Hello,

 

I’m trying to initialize my serial lcd and write characters to it.

 

Here’s what I’ve tried so far:

 

$NOLIST

$include (c8051f340.inc)              ; Include register definition file.

$LIST

;

;

;

;

;

;

;===============================================================================================

;Equates

;===============================================================================================

;

LCD bit P0.2

;===============================================================================================

 

 

org 00h

ljmp Main

 

 

Main:

anl PCA0MD,#(040h) ; Clear Watchdog Enable bit

mov XBR1, #40h ; Enables Crossbar 1

;==============================================================================================

;Uart Initialization (SCON and CLOCK Control

;

;The following code is set up to initialize the UART to an 8 bit mode.

;Sets Timer 1 up for 8 bit auto reload.

;

;System Clock 12Mhz

;divide by 4 = 3Mhz

;

;==============================================================================================

mov SCON0, #01000010b ;sets up serial port output. 

mov CKCON,#01h ;sets up clock control for 

mov TMOD,#00100001b ;sets up timer 1 for 8 bit auto reload; timer 0 set to 8 bit auto reload.

mov TH1, #64h ;sets up timer 1 for 9600 baud from table 18.1

setb TR1 ;starts timer 1

clr TF1 ;clears timer 1 overflow flag

clr TI0 ;clears SCON 0.1 

 

mov A,#’D’ ;

mov TH1, #’-3′ ;

setb TR1 ;

mov SBUF0,A ;

jnb TI0,$ ;

jmp main ;

 

 

 

Me and 5 other classmates are trying to get this code right and we cannot seem to figure out what is missing.

The lcd is a parallax 16×4 lcd with a baud rate set to 9600.

 

I have to admit that assembly code isn’t my strongsuit and any help would be greatly appreciated.

 

Thanks,

 

-Cory

[AJISH ALFRED]

Hi, 

Which is the serial LCD that you are using? Please post the part number.

I wonder why you went for assembly coding when you can find plenty of sample codes for the same in C language.

[Author]

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