How to do serial command with 2 stop bits?

[Darrel Taylor]

Stop bits are at "IDLE" level.
So if you use ...

DEFINE CHAR_PACING xxx

where xxx = 1 bit period in us, then you're good to go.
<br>

[Pimentel]

Stop bits are at "IDLE" level.
So if you use ...

DEFINE CHAR_PACING xxx

where xxx = 1 bit period in us, then you're good to go.
<br>

Darrel, Can you help me?
I restarted my old project and now I need to send a serial data in 4800 TTL levels , 8 data bits and 2 stop bits. How to do it using PBP?
I have to simulate the second stop bit ok? And 1 bit in 4800 baud ~ 208us
The 4800 baud is missing in the serout command mode but is possible to use char_pacing in microsenconds
Using the serout2 command is possible to use a {pace} but just in milisenconds !
How to do it then???

Thanks

Pimentel

[mackrackit]

http://melabs.com/resources/ser2modes.htm
Has the modes for 4800.

[Darrel Taylor]

Pimentel,

You could try something like this ...Assuming you have PBP 2.60

DEFINE OSC 8

BuffLength   CON 32
Buff         VAR BYTE[BuffLength]
Idx          VAR BYTE
SerPin       VAR PORTC.6

HIGH SerPin
PAUSE 100

Main:
    ARRAYWRITE Buff,["Hello World!",13,10,0]
    GOSUB SendBuff
    PAUSE 1000
GOTO Main

;----------------------------------------------------
SendBuff:
    FOR Idx = 0 TO BuffLength -1
        IF Buff(Idx) = 0 THEN EXIT
        SEROUT2  SerPin,188,[Buff(Idx)]
        PAUSEUS 220
    NEXT Idx
RETURN

[Pimentel]

Pimentel,

You could try something like this ...Assuming you have PBP 2.60

DEFINE OSC 8

BuffLength   CON 32
Buff         VAR BYTE[BuffLength]
Idx          VAR BYTE
SerPin       VAR PORTC.6

HIGH SerPin
PAUSE 100

Main:
    ARRAYWRITE Buff,["Hello World!",13,10,0]
    GOSUB SendBuff
    PAUSE 1000
GOTO Main

;----------------------------------------------------
SendBuff:
    FOR Idx = 0 TO BuffLength -1
        IF Buff(Idx) = 0 THEN EXIT
        SEROUT2  SerPin,188,[Buff(Idx)]
        PAUSEUS 220
    NEXT Idx
RETURN

Thanks Darrel,

I am using 2.46 version!
I will test it idea today on job. I do not know if go work because I already tested it:
SEROUT2 TX,188,[$00,$50,$42,$01,$0A] 'ex: 14.2500 MHz

and other mode:
SEROUT2 TX,188,[$00]: PAUSEUS 208 '1/4800 ~208us
SEROUT2 TX,188,[$50]:PAUSEUS 208
SEROUT2 TX,188,[$42]:PAUSEUS 208
SEROUT2 TX,188,[$01]:PAUSEUS 208
SEROUT2 TX,188,[$0A]:PAUSEUS 208

but without sucess!

Why do you used a pauseus of 220us?
I used a 4MHz cristal as osc

Thanks again

Pimentel

[Pimentel]

Thanks Darrel,

I am using 2.46 version!
I will test it idea today on job. I do not know if go work because I already tested it:
SEROUT2 TX,188,[$00,$50,$42,$01,$0A] 'ex: 14.2500 MHz

and other mode:
SEROUT2 TX,188,[$00]: PAUSEUS 208 '1/4800 ~208us
SEROUT2 TX,188,[$50]:PAUSEUS 208
SEROUT2 TX,188,[$42]:PAUSEUS 208
SEROUT2 TX,188,[$01]:PAUSEUS 208
SEROUT2 TX,188,[$0A]:PAUSEUS 208

but without sucess!

Why do you used a pauseus of 220us?
I used a 4MHz cristal as osc

Thanks again

Pimentel

Darrel,
The test failed !
If you or somebody has other idea please let me know, ok?
Thanks

Pimentel

[Dave]

Pimentel , Why not just use 4800 baud, 8 data bits, 1 parity bit , and 1 stop bit? Just dont change the partiy bit's state... It's worked for me in the past...

Dave Purola,
N8NTA

[Pimentel]

http://melabs.com/resources/ser2modes.htm
Has the modes for 4800.

Thanks! I already read this publication but I am using 2 stop bits!!!