Author |
Topic: variable baud rate (Read 606 times) |
|
hitsware
Junior Member
member is offline
 
Gender: 
Posts: 70
|
 |
variable baud rate
« Thread started on: Jul 24th, 2016, 7:30pm » |
|
How may I have baudrate be a variable ?
The below gives me an 'invalid channel'
Code:
FOR x=0 TO 7: READ note
port% = OPENUP("COM4: note ,N,8,1")
FOR y=0 TO 100
BPUT#1,CHR$(85);
NEXT y: NEXT x
DATA 240,270,300,320,360,400,450,480
|
|
 Logged
|
|
|
|
DDRM
Administrator
member is offline
Gender:
Posts: 321
|
|
Re: variable baud rate
« Reply #1 on: Jul 25th, 2016, 11:23am » |
|
Without the relevant hardware, I can't test this, so treat it with a degree of scepticism, but I imagine the problem is that you need to convert the VALUE of note into a string, and include that, rather than the variable name. You can do that with STR$.
Does this do what you want?
Code:
FOR x=0 TO 7
READ note
port$="COM4:"+STR$(note)+",N,8,1"
port% = OPENUP(port$)
FOR y=0 TO 100
BPUT#1,CHR$(85);
NEXT y
NEXT x
DATA 240,270,300,320,360,400,450,480
I note that you are opening the same channel 8 times: is that really what you want? Should there be a CLOSE#port% before the NEXT X?
Best wishes,
D
|
| « Last Edit: Jul 25th, 2016, 11:26am by DDRM » |
Logged
|
|
|
|
hitsware
Junior Member
member is offline
Gender:
Posts: 70
|
|
Re: variable baud rate
« Reply #2 on: Jul 25th, 2016, 4:21pm » |
|
Code:
FOR x=0 TO 7: READ note
port$="COM4:"+STR$(note)+",N,8,1"
port% = OPENUP(port$)
FOR y=0 TO 500
BPUT#1,CHR$(85);
NEXT y: CLOSE#1: NEXT x
DATA 240,270,300,320,360,400,450,480
Thank You !
|
|
Logged
|
|
|
|
DDRM
Administrator
member is offline
Gender:
Posts: 321
|
|
Re: variable baud rate
« Reply #3 on: Jul 26th, 2016, 07:49am » |
|
Shouldn't that be
BPUT#port%
...
CLOSE#port%
?
You may be lucky and get it allocated to channel 1, but you may not...
Best wishes,
D
|
|
Logged
|
|
|
|
hitsware
Junior Member
member is offline
Gender:
Posts: 70
|
|
Re: variable baud rate
« Reply #4 on: Jul 26th, 2016, 3:49pm » |
|
Code:
port% = OPENUP("COM1: 9600,N,8,1")
PRINT port%
returns '1'
It works as is
The "channel" is COM4
(depending what and where is plugged in)
(I don't pretend to understand)
|
|
Logged
|
|
|
|
Zaphod
Guest
|
|
Re: variable baud rate
« Reply #5 on: Jul 26th, 2016, 11:13pm » |
|
I think you really should take DDRM's advice.
In your particular circumstance it may return 1 as the channel number, but if there is another channel open it won't, so as it stands it is a program that has great potential to fail that can be easily fixed as DDRM mentioned.
You should also check for port% being greater than zero and only BPUT the data if it is, and if it is zero then flag that the port has not opened to the user.
If you issue a CLOSE# port% when your code fails it will close ALL channels, even those open by other parts of the program.
Programs that are robust and that protect against failure and tells you what is going on if it does fail are so much more useful I think.
Code:
FOR x=0 TO 7
READ note
port% = OPENUP("COM4: "+STR$(note)+" ,N,8,1")
IF port% THEN
FOR y=0 TO 100
BPUT#port%,CHR$(85);
NEXT
CLOSE# port%
ELSE
PRINT "Port not opened ",note
ENDIF
NEXT
END
DATA 240,270,300,320,360,400,450,480
|
|
Logged
|
|
|
|
hitsware
Junior Member
member is offline
Gender:
Posts: 70
|
|
Re: variable baud rate
« Reply #6 on: Jul 28th, 2016, 11:24pm » |
|
Thanks Guys ......
Moot anyways. I was thinking using it for music,
but forgot the obvious (duh) Changing the baud changes
the timing so doesn't keep a beat 
|
|
Logged
|
|
|
|
DDRM
Administrator
member is offline
Gender:
Posts: 321
|
|
Re: variable baud rate
« Reply #7 on: Jul 29th, 2016, 07:12am » |
|
No, but the changes are known, so as long as you know the previous and new baud rates you can calculate how much to change the beat frequency or duration by?
Best wishes,
D
|
|
Logged
|
|
|
|
|
