Thank you very much! It's working now, I can ask for a status and
receive the reply!
Darren Clark
On 8/5/20 10:36 AM, Ron Lauzon wrote:
You can have the COM port open for both input and output at the same time.
I did a TPDD-ish experiment a while ago and wrote some BASIC programs
to work with it.
Example:
https://github.com/rlauzon54/rdos/blob/master/Clients/RLIST.BA
--
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100/102 - Tandy 1100FD - Tandy 1400LT - Commodore 64 - TRS-80 Model 4P
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terminal/Raspberry Pi 0
Some people like to work on old cars. But old computers are cheaper
and don't require a big garage.
Aug 5, 2020, 09:57 by [email protected]:
Hello Everybody,
I have a quick question about serial IO. I have a serial
plotter connected to my 200 and have been sending commands to it,
but I haven't been able to read responses back. I posed it here
(only sending commands):
https://pay.reddit.com/r/retrobattlestations/comments/i3ol8w/we_dont_get_enough_working_pen_plotters_here_so/
if you want to see it working.
This is the code for sending commands to the plotter:
5 F$ = "COM:88N1ENN"
10 OPEN F$ FOR OUTPUT AS 1
20 PRINT #1, "IN"
30 PRINT #1, "SV1"
40 PRINT #1, "EC"
50 PRINT #1, "AS4"
60 PRINT #1, "LB+0000+1050HELLO REDDIT"
70 PRINT #1, "LB+0000+0900/U/BiggRanger"
80 PRINT #1, "LB+0000+0750/August4,2020/"
I want to read responses back, I've tried closing the port and
then opening as "FOR INPUT", but that isn't working. I think it
may be clearing the input buffer when opening the port.
I want to create a subroutine the sends a command to check the
status of the plotter, receive the string back and parse it to see
if the plotter is busy and keep looping until it's not busy, or
there is an error. I just can't figuer out sending and receiving
over serial with the 200.
Darren Clark
