serout

jcleaver

new to the basic stamp
trying to setup a display using a 1 pin serial lcd (at89c2051 ic)
cannot get display to work
using bs2x
not alot of information with the lcd but seem to be set for 9600 baud

some of there example code serout txd 9600[noparse][[/noparse] "9" cr]
cannot use this code with my stamp ver
any help???

Chris Savage

You should post the code you are using now so we can see what might be wrong with it.· Plus you really should try (Google) to get more information on this display or at least a datasheet.

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Chris Savage
Parallax Tech Support
csavage@parallax.com

jcleaver

thanks for the quick responce

have tried all the sample·programs for the serout



plus just a simple

main:

serout 1, 16780, [noparse][[/noparse]"hello", cr]

pause 1000

goto main

tried many number for the baud display is connected to pin 1

Jon Williams

Perhaps the signal is true, not inverted.· I use a template that makes SEROUT/SERIN baudmode parameters easy to set -- no matter what BS2 module is being used.· That template is attached.

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Jon Williams
Applications Engineer, Parallax

jcleaver

thanks will try and let you know

jcleaver

here my completed program

still not working??



· ' =========================================================================
'
'·· File.......
'·· Purpose....
'·· Author..... Jon Williams -- Parallax, Inc.
'·· E-mail..... jwilliams@parallax.com
'·· Started....
'·· Updated.... DD MMM YYYY
'
'·· {$STAMP BS2sx}
'·· {$PBASIC 2.5}
'
' =========================================================================


'

---

[noparse][[/noparse] Program Description ]

---

'

---

[noparse][[/noparse] Revision History ]

---

'

---

[noparse][[/noparse] Conditional Definitions ]

---

'

---

[noparse][[/noparse] I/O Definitions ]

---

'

---

[noparse][[/noparse] Constants ]

---

#SELECT $STAMP
· #CASE BS2, BS2E, BS2PE
··· T1200······ CON···· 813
··· T2400······ CON···· 396
··· T4800······ CON···· 188
··· T9600······ CON···· 84
··· T19K2······ CON···· 32
··· TMidi······ CON···· 12
··· T38K4······ CON···· 6
· #CASE BS2SX, BS2P
··· T1200······ CON···· 2063
··· T2400······ CON···· 1021
··· T4800······ CON···· 500
··· T9600······ CON···· 240
··· T19K2······ CON···· 110
··· TMidi······ CON···· 60
··· T38K4······ CON···· 45
· #CASE BS2PX
··· T1200······ CON···· 3313
··· T2400······ CON···· 1646
··· T4800······ CON···· 813
··· T9600······ CON···· 396
··· T19K2······ CON···· 188
··· TMidi······ CON···· 108
··· T38K4······ CON···· 84
#ENDSELECT

SevenBit······· CON···· $2000
Inverted······· CON···· $4000
Open··········· CON···· $8000

Baud··········· CON···· T9600


'

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[noparse][[/noparse] Variables ]

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'

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[noparse][[/noparse] EEPROM Data ]

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'

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[noparse][[/noparse] Initialization ]

---

Reset:


'

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[noparse][[/noparse] Program Code ]

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Main:
txd CON 1

· here:

· SEROUT TxD,baud,[noparse][[/noparse]"Hello world", CR]
· PAUSE 1000

· GOTO here
· END


'

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[noparse][[/noparse] Subroutines ]

---

Jon Williams

Without providing better information on the LCD you're trying to talk to nobody will be able to help. Do you have a link to a data sheet?

And did you try inverted mode?· If not, change the Baud defintion line to this:

Baud··· CON···· Inverted | T9600

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Jon Williams
Applications Engineer, Parallax

dandreae

I know that the Hitachi 44780 chips work with the BASIC Stamps, I'm not sure about the Atmel chips?· Parallax carries a serial LCD for $29.95, here is a link for more information:· http://www.parallax.com/detail.asp?product_id=27976


Dave

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Dave Andreae

Tech Support
dandreae@parallax.com
Http://www.parallax.com

·

Jon Williams

I think he's using one of those dirt-cheap, barely documented Chinese serial "backpacks" that one can get from eBay for a few bucks. As I remember, other customers tried them too and found that the few dollars saved was not worth the headache and frustration....

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Jon Williams
Applications Engineer, Parallax

Paul Baker

hmm, yeah I remember someone who got one of those, later Ill see if I can dig up the thread, they too had many problems with it.

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·1+1=10

jcleaver

That saying the least so much for cheap very little product info
did get it working ended being 8 bit 9600 no parity (240) still cant control the cursor properly