Matt-
Thanks! that helped a lot. I found a function that converts decimal to
ascii. It seems to work great, but when I send anything over 127, my
most significant bit is lost and my port won't make that last output
go high (in my case, c7)
maybe in my JAL code? Below is my main loop- just a modified the loop
on the Jallib sample 18f14K50_usb_serial.
Visual studio seems to be doing it's job converting correctly... I'm
sending a ÿ when I convert a 255. The echoed characters are correct
up to 127 as well... beyond that I only get ? marks back.
By the way, Visual Studio Express is free, and I've been able to do
some remarkable things with it. I mostly use the Visual basic version.
My JAL code:(all the setup stuff, etc not included, except my portc
setup)
portc_direction = all_output
-- main loop
forever loop
-- poll the usb ISR function on a regular base, in order to
-- serve the USB requests
usb_serial_flush()
-- check if USB device has been configured by the HOST
if ( usb_cdc_line_status() != 0x00 ) then
if !has_shown_welcome_msg then
has_shown_welcome_msg = true
print_string( usb_serial_data, str_welcome )
end if
else
has_shown_welcome_msg = false
end if
-- check for input character
if usb_serial_read( ch ) then
portc=ch
-- echo input character
usb_serial_data = (ch )
end if
end loop
On Jun 27, 5:51 pm, mattschinkel <[email protected]> wrote:
> Search Google for "ASCII CHART". If you want numbers, you may need to
> convert your ASCII that you are receiving into decimal numbers and the
> other way around to send data back to the PIC. It is the software that
> makes it show on your PC as an ASCII character. I'm sure Visual Studio
> has a function for this conversion.
>
> I have some serial port software that I wrote in Autoit that you may
> modify if you like. It is able to send decimal numbers to the PIC. I
> prefer this windows language because it is free.
>
> Matt.
>
> On Jun 27, 3:14 pm, John in WI <[email protected]> wrote:
>
> > Is there a simple example for me to study on receiving bytes (not just
> > characters) via usb_serial_read????
> > I'm using a 18f14k50- I can send & receive ascii characters, but I'd
> > rather just send a raw decimal form 0-255. When I send a raw number
> > (something with no quotation marks), let's say 127, only the 1 seems
> > to be stored in my usb_serial_read variable.
>
> > My goal is to simply assign the ports on my 18f14k50 with whatever
> > byte I am sending via the usb_serial_read ... for now, I would settle
> > for just 1 port.
>
> > I'm using Visual Studio on the computer end.
>
> > Later, I want to do all 3 ports. Would I have to set up some sort of
> > packet to write decimal form byte values to all 3 ports? Any examples
> > of this out there?
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