LCD won't play right

MrDEB · Jan 6, 2020

seems I have been here before. I ordered some crystals but what gets me is I had this operational before.
Same circuit but uing a 4520. Now have a 18f4321. Have two LCDs that only show white squares but different patterns.
I think it's a timing issue but?
here is my code (sorry forgot how to correctly post code)

Device=18f4321
Clock = 8 '8MHz
Config OSC = INTIO2
#option LCD_DATA = PORTD.4
#option LCD_RS = PORTD.1
#option LCD_EN = PORTD.0
#option SWORDFISH_SE = true
Include "IntOSC.bas"
Include "SetDigitalIO.bas"
Include "Utils.bas"
Include "LCD.bas"

// some LCD options...

// set this option true if building with the SE compiler

// program start...
While true
SetAllDigital
Cls
WriteAt(1,1,"Hello World")
Wend

hexreader · Jan 6, 2020

Disclaimer - I know nothing about Swordfish, I don't own a PIC18F4321 and I have no idea what LCD display you are using...

This line bothers me...

Code:

#option LCD_DATA = PORTD.4

In my experience, LCD data port is 4 bits wide, or 8 bits.
PORTD.4 implies a single bit definition in my head
Should this be...

Code:

#option LCD_DATA = PORTD

Just guessing...

MrDEB · Jan 6, 2020

the LCD can be run in 4 or 8 bit mode. If using 4 bit the portD.4 inducates that the last port bits are used for data.
this is a Hitachi HD44780

Dan Soze · Jan 6, 2020

hexreader said:
Disclaimer - I know nothing about Swordfish, I don't own a PIC18F4321 and I have no idea what LCD display you are using...

From page 46 of Swordfish Compiler Language Reference Guide:
============================================================

Code:

#option
#option identifier [= expression]

Creates an option identifier. An option identifier is global and identical to the #define directive in every way, except for two main differences. Firstly, an option identifier can be seen and used in the declaration block of a user program. For example,

Code:

#option BUFFER_SIZE = 64
const MyBufferSize = BUFFER_SIZE

In the above example, the program constant MyBufferSize becomes equal to 64, as this is the value assigned to the option identifier BUFFER_SIZE. It is important to note that a user program identifier will always take precedence over an option directive. For example,

Code:

#option BUFFER_SIZE = 64
const BUFFER_SIZE = 16
const MyBufferSize = BUFFER_SIZE

In this example, MyBufferSizebecomes equal to 16. The other difference between option and define directives is that re-declaring an option twice, using the same identifie,r will not cause an error. For example,

Code:

#option BUFFER_SIZE = 64
#option BUFFER_SIZE = 16

In this example, BUFFER_SIZE will become equal to 64, which is the first option found by the preprocessor. The second declaration of BUFFER_SIZE is ignored.

This capability may appear a little redundant at first, but it's an extremely useful technique to enable users to configure a module from their main program code.

============================================================

In my opinion the Swordfish Compiler directive "#option" seems to be a method to inject syntax bugs in a way the compiler will not find.

This issue seems to concern the developers as the next directive described on page 47 is "IsOption(Identifier)".

This directive is used to validate that a symbol declared using the #option directive is a member of a valid list of options.

The syntax of the example in the Reference Guide on page 47 is wrong, it is missing the #else part.

The correct example should be something like:

Code:

#if IsOption(USART_LS) and not(USART_LS in(true, false))
   #error USART_LS, "Invalid option. LS must be TRUE or FALSE."
#else
   #option USART_LS = false
#endif

Note that threads involving MrDEB can run a bit long, see:

reading a 4x4 switch matrix

I am starting out with swordfish code to read a 4 x 4 switch matrix but something is wrong with my case select It shows an incompatible type error? I tried inserting comas etc but?? Maybe just go with a bunch of IF THEN statements?? DEVICE = 18F24k20 ' Tell the compiler what chip we are...

www.electro-tech-online.com

Pommie · Jan 6, 2020

Dan Soze said:
Note that threads involving MrDEB can run a bit long, see:

Stop it. That pain had diminished.

Mike.

Dan Soze · Jan 6, 2020

Pommie said:
Stop it. That pain had diminished.

hexreader should be forewarned wherein he treads.

Where is your compassion?

If we try maybe we can actually help MrDEB to a better place.

If we fail how about a thread that runs more than 400 posts?

Macbeth, Act 5, Scene5, Line 25.

be80be · Jan 6, 2020

What do you think happens here

Code:

While true
SetAllDigital
Cls
WriteAt(1,1,"Hello World")
Wend

your code just keeps clearing the screen as fast as it writes it.

hexreader · Jan 6, 2020

Dan Soze said:
hexreader should be forewarned wherein he treads.

Many thanks - forewarned is fore-armed.
Much appreciated.

This thread motivated me to download Swordfish BASIC and the manual - now that I have tried it, I hate it - ROFL

be80be · Jan 6, 2020

Try adding a

Code:

delayms(1000)

like

Code:

SetAllDigital
While true
Cls
WriteAt(1,1,"Hello World")
delayms(1000)
Wend

MrDEB · Jan 7, 2020

will give it a go Be80using the example from the samples included w/ swordfish but will try the delay.
Jonsea suggested along time ago to include the use of a crystal. Waiting on parts I ordered from Sparkfun.
This thread will be historic as it won't go past 2 pages

Ian Rogers · Jan 7, 2020

MrDEB said:
This thread will be historic as it won't go past 2 pages

So what if it does.... You take your time.... Members don't have to read it.... If you want to break a record, lets go for it!!

be80be · Jan 7, 2020

I just reposted what you posted MrDeb
The CLS clears the screen you wrapped it inside a loop while wend
So this is what happens the loop goes as fast as it can setting and clearing the screen faster then you can see it as a matter of
fact faster then it can more then likely write it.

Pommie · Jan 7, 2020

Ian Rogers said:
So what if it does.... You take your time.... Members don't have to read it.... If you want to break a record, lets go for it!!

I'm kinda looking forward to it in a nostalgic kinda way.

Mike.

be80be · Jan 8, 2020

Whats funny is ok 18f4520. cost 6 bucks MrBed you really need a newer basic that can use the newer 16fxxxx chip's

Pommie · Jan 8, 2020

be80be said:
Whats funny is ok 18f4520. cost 6 bucks MrBed you really need a newer basic that can use the newer 16fxxxx chip's

Or just learn C. Oh wait!

Mike.

MrDEB · Jan 8, 2020

been looking at C but at my age I feel it would be three steps backward.
have chips on order

Pommie · Jan 8, 2020

I'm 61 and C works for me.

Mike.

MrDEB · Jan 8, 2020

but to learn something new.
After a bypass surgery a year ago my short term memory is not real sharp.
for the small projects I am playing with Swordfish seems fine but maybe need to rethink what pic I am using.

MrDEB · Jan 8, 2020

I moved things around and still get only white squares.
checked and rechecked wiring with ohm meter etc.
thinking maybe because I have the Vcc and VSS daisy chaned on a perf board? could also be in need of a crystal but have operated with good results before.
going to rewire but that dosen't explain why SAME board worked before. BAD LCD? been trying using three different LCD modules.

MrDEB · Jan 8, 2020

Houston we have landed!!
used a different perf without daisy chaining the VCC or VSS and a different code (one I used for reading a keypad)
The LCD displays text (turns out one of the LCD modules was bad, circular filed it) now I can progress on this project.
Waiting for tactle switches w/LEDs

LCD won't play right

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