LCD and HSEROUT do not mix well ?

[mister_e]

If i remember correctly, lower bits of PORTB, ( PORTB.2 ) is also multiplexed with RX of the USART. And i don't remember if this PIC allow you to disable the RX part, so my guess would be...

    for value = 1 to 255
        RCSTA=0 ' Disable USART
        TRISB.2=0
        pause 25
        LCDout $FE,$C0, dec value
        pause 25
        RCSTA=$90 ' enable USART
        pause 25
        hserout [0,dec value]          ;  IF THIS LINE IS ENABLED, LCD DOESN NOT DISPLAY ANYTHING
        pause 50
        next value

sure enough there's few unecessary delay up here... not sure if this will help and work at all using the above... Maybe a good situation to use SEROUT/SEROUT2/DEBUG?

PS: Make sure of your DEFINES, must all be in UPPERCASE, unless, it may not work.

[Charles Linquis]

Mister E is right, the DEFINES must be in upper-case, and are not checked by the compiler, which means there are no error messages if you don't enter them correctly - they just don't work.

Also, you are using PORTA.4 as your LCD ENABLE. You MUST put a pull-up on this port if you are going to use it as an output.

[Archangel]

If i remember correctly, lower bits of PORTB, ( PORTB.2 ) is also multiplexed with RX of the USART. And i don't remember if this PIC allow you to disable the RX part, so my guess would be...

    for value = 1 to 255
        RCSTA=0 ' Disable USART
        TRISB.2=0
        pause 25
        LCDout $FE,$C0, dec value
        pause 25
        RCSTA=$90 ' enable USART
        pause 25
        hserout [0,dec value]          ;  IF THIS LINE IS ENABLED, LCD DOESN NOT DISPLAY ANYTHING
        pause 50
        next value

sure enough there's few unecessary delay up here... not sure if this will help and work at all using the above... Maybe a good situation to use SEROUT/SEROUT2/DEBUG?

PS: Make sure of your DEFINES, must all be in UPPERCASE, unless, it may not work.

Hi Steve, A little time sharing going on in there, cool.

[Johan]

Thank you for your help
I modifies as Steve's suggestion, it works now

Actually I do not require the RX part, is there any way permanently disable the RX part ( to save 2x pause 25 ) ?

[mister_e]

Not sure you require them anyways... seems there's no way to use only the Transmitter section. So, or you change HSEROUT to DEBUG, or you add the above in your code.

Probably I would use the DEBUG route myself.