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servello

Hi all,

I'm trying to figure out how I can get the data that is displayed in the DEBUG panel to be displayed on my Parallax 27976 Serial LCD.
How can I do this with my BS2 and a Parallax Temp/Humidity Sensor? I tried replacing the DEBUG command with SEROUT and it's arguments, but was unsuccessful in getting the data to display. The regular text would display, but none of the variable data would.

Best.

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Mike Green

First, figure out the SEROUT statement. Read the sections in the PBasic Manual on DEBUG and SEROUT and compare them.

If you want suggestions on your SEROUT statement vs. DEBUG statement, you'll have to post them.
It's hard to tell what's wrong if we don't know what you tried to do.

erco

Always post your code for help.

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·"If you build it, they will come."

Unsoundcode

Hi servello, it sounds like you have everything right except the format for your variables. The LCD module expects a serial string of ASCII character codes.

Your text is formatted to send ASCII character codes when you enclose it in quotes, for example sending "Hello" transmits the 5 character codes (decimal values) 72 101 108 108 111.

To transmit the ASCII character codes for your variables instead of quotes you would use the DEC formatter eg:

SEROUT tx,baud,[noparse][[/noparse]DEC my_variable]

so say my_variable had a decimal value of 74 using the DEC formatter would transmit the two ASCII values 55 52.

check out the ASCII character codes

Jeff T.

servello

Thanks, Mike and erco.

I hadn't posted the code because the examples were very long. So I will attach them here with this post.

All I want to do is send the data generated by the periphial to an LCD rather than the DEBUG window.

As I mentioned, I did give it a try before I posted my request for help. I looked at the code for the LCD example and compared it to the DEBUG statements in the Sensor code. The results were less than desirable. Since my attempt was unsuccessful, I did not think to keep the 'merged' code that I wrote.

I had assumed that it was quite normal to have DATA show on a LCD. I mean, isn't that the whole purpose of an LCD- to let you see what's going on with your circuit?

Still I have been unable to find any simple example to go by. The documents accompanying the periphials (I have the Flexiforce, Emic, SX-Video Module, Memsic 2125 and Sensirion) all show examples with output to the DEBUG window.

. . . Help

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servello

Unsoundcode said...
Hi servello, it sounds like you have everything right except the format for your variables. The LCD module expects a serial string of ASCII character codes.

Your text is formatted to send ASCII character codes when you enclose it in quotes, for example sending "Hello" transmits the 5 character codes (decimal values) 72 101 108 108 111.

To transmit the ASCII character codes for your variables instead of quotes you would use the DEC formatter eg:

SEROUT tx,baud,[noparse][[/noparse]DEC my_variable]

so say my_variable had a decimal value of 74 using the DEC formatter would transmit the two ASCII values 55 52.

check out the ASCII character codes

Jeff T.

Thanks. I'll try to work on the code (I'm REAL new here). Do you know of any BS2 code available that can be used as an example? Something that uses the Stamp, an LCD and maybe a Parallax type sensor or periphial (<---how the hell do you spell this) that has the DATA go to the LCD.

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Franklin

Does the LCDTestMessage.bs2 code work for you and if not is your LCD data pin on the BS2 pin 14?

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- Stephen

PJAllen

-- peripheral --

servello

Franklin said...
Does the LCDTestMessage.bs2 code work for you and if not is your LCD data pin on the BS2 pin 14?

With just the LCD hooked up it does work, Stephen.

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servello

PJ Allen said...
-- peripheral --

[noparse];)[/noparse]

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Franklin

Since the LCD code works and I've used the sht11 code could you attach the code you are trying to get to work and the wiring scheme you are using? That would help.

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- Stephen

servello

Hi Stephen,

I'll have to start from the beginning, since I didn't save the code from my initial attempt.
I'll try working on it today (Sunday) and post the code a bit later.

Thanks for helping out.

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servello

OK, Got it. Whew!

I have the LCD connected to Pin 15 and the Flexiforce sensor connected to Pin 14.

Here's the code:

' Flexiforce_with_LCD.bs2
' Displays R/C Discharge Time on LCD
' {$STAMP BS2}
' {$PBASIC 2.5}

' -----[noparse][[/noparse] Declarations ]----------------------------------------------------

rawForce        VAR     Word            ' Stores raw output
sensorPin       CON     14              ' Flexiforce sensor circuit

' -----[noparse][[/noparse] Main Routine ]----------------------------------------------------

SEROUT 15, 84, [noparse][[/noparse]22, 12]                 ' Initialize LCD
PAUSE  5

Measure:

  HIGH sensorPin                        ' Discharge the capacitor
  PAUSE 2
  RCTIME sensorPin,1,rawForce           ' Measure RC charge time
  SEROUT 15, 84, [noparse][[/noparse]"Flexiforce Data = ", DEC rawForce, 128]

GOTO Measure

My task now will be to try to get all the other sensors I have, to output to the LCD.
I forgot to mention in my earlier post that I also have the Parallax RFID, PIR, Dinsmore compass, PING, Light to Frequency module on top of all those already mentioned. I should be quite busy for a while [noparse]:)[/noparse]

Thanks all for your input.

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servello

For the benefit of any who may have had the same questions I had, I've attached a PDF with a short, simple explanation of what I did and also the code.

Unfortunately, this server will not allow the PDF to be uploaded, so I've zipped it instead.

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