Stamp2SX to LCD trouble

Archiver

try $4054

okkie@m... wrote:
>
> I am trying to send strings to a 2x16 LCD but no luck. I have tried
> 2400 & 9600 Inverted and Non-inverted but still cant get it right. I
> tested the LCD on my PC and it works fine. If I use non-inverted I
> get a bunch of triangles otherwise I get a lot of garbage.
> Typical use:
> Serout 0,84+$4000,10,[noparse][[/noparse]"Hello"] for 9600
> serout 0,396+$4000,10,[noparse][[/noparse]"Hello"] for 2400
>
> Anyone have any Ideas?

Archiver

I am trying to send strings to a 2x16 LCD but no luck. I have tried
2400 & 9600 Inverted and Non-inverted but still cant get it right. I
tested the LCD on my PC and it works fine. If I use non-inverted I
get a bunch of triangles otherwise I get a lot of garbage.
Typical use:
Serout 0,84+$4000,10,[noparse][[/noparse]"Hello"] for 9600
serout 0,396+$4000,10,[noparse][[/noparse]"Hello"] for 2400

Anyone have any Ideas?

Archiver

At 10/2/2000 +0000 11:22 AM, you wrote:
>I am trying to send strings to a 2x16 LCD but no luck. I have tried
>2400 & 9600 Inverted and Non-inverted but still cant get it right. I
>tested the LCD on my PC and it works fine. If I use non-inverted I
>get a bunch of triangles otherwise I get a lot of garbage.
>Typical use:
>Serout 0,84+$4000,10,[noparse][[/noparse]"Hello"] for 9600
>serout 0,396+$4000,10,[noparse][[/noparse]"Hello"] for 2400
>
>Anyone have any Ideas?


The BS2-SX timings differ from the BS-2. Grab the BS-2SX document from the
Parallax website [noparse][[/noparse]www.parallaxinc.com ] >> Documentation

Extracted from that document:

quote

(See pages 319 – 329). Differences are in timing only, as follows:
Range of serial output is 304.5 baud to 115.2K baud. To calculate proper
bit period value for any baud rate, use the formula: Bit_Period =
INT(2,500,000 / baud rate) – 20. Timeout value is in 0.4ms units. Use
Revised Table I-6, below, for common baud modes.

end quote

Hope that helps.

Regards,

Bruce Bates

Archiver

Thank you, will try it

New timing for SX

Data Speed Direct
Baud Rate 8 data bits, 7 data bits,
no parity even parity
600 20530 28722
1200 18447 26639
2400 17405 25597
4800 16884 25076
9600 16624 24816
19200 16494 24686
38400 16429 24621

Data Speed Through Line driver
Baud Rate 8 data bits, 7 data bits,
no parity even parity
600 4146 12338
1200 2063 10255
2400 1021 9213
4800 500 8692
9600 240 8432
19200 110 8302
38400 45 8237








--- In basicstamps@egroups.com, Bruce Bates <bvbates@u...> wrote:
> At 10/2/2000 +0000 11:22 AM, you wrote:
> >I am trying to send strings to a 2x16 LCD but no luck. I have tried
> >2400 & 9600 Inverted and Non-inverted but still cant get it right.
I
> >tested the LCD on my PC and it works fine. If I use non-inverted I
> >get a bunch of triangles otherwise I get a lot of garbage.
> >Typical use:
> >Serout 0,84+$4000,10,[noparse][[/noparse]"Hello"] for 9600
> >serout 0,396+$4000,10,[noparse][[/noparse]"Hello"] for 2400
> >
> >Anyone have any Ideas?
>
>
> The BS2-SX timings differ from the BS-2. Grab the BS-2SX document
from the
> Parallax website [noparse][[/noparse]www.parallaxinc.com ] >> Documentation
>
> Extracted from that document:
>
> quote
>
> (See pages 319 – 329). Differences are in timing only, as follows:
> Range of serial output is 304.5 baud to 115.2K baud. To calculate
proper
> bit period value for any baud rate, use the formula: Bit_Period =
> INT(2,500,000 / baud rate) – 20. Timeout value is in 0.4ms units.
Use
> Revised Table I-6, below, for common baud modes.
>
> end quote
>
> Hope that helps.
>
> Regards,
>
> Bruce Bates

Archiver

The correct baudmode for a BS2-SX/9600 baud is $40F0. Substitute this
for the baudmode in the example program ($4054) and you'll be fine.

This is covered in more detail in an app note at
www.seetron.com/bsx_tip1.htm . A list of app notes is at
www.seetron.com/lcd_andex.htm .

Archiver

Thank you, I seem to have solved the problem by using the table in
the latest sx release notes. I included it in a previous post.
Thank you


--- In basicstamps@egroups.com, stamps@s... wrote:
> The correct baudmode for a BS2-SX/9600 baud is $40F0. Substitute
this
> for the baudmode in the example program ($4054) and you'll be fine.
>
> This is covered in more detail in an app note at
> www.seetron.com/bsx_tip1.htm . A list of app notes is at
> www.seetron.com/lcd_andex.htm .