Jump to content

rs232 and USB2.0 question


v_pan

Recommended Posts

hello everybody..

i made a project based on microcontroller and communicate with 232.

my baud rate is at 115200bps and proved to be very poor for what i want to do.

i'm thinking to change my communication to usb2.0 (microcontroller support )

my question is ..

if i do this ,do i have to change my program on labview?

i mean ..

now i select COM1 to communicate with micro

after change this

the only thing i have to do is to change COM1 to COM4 for example?

and increase baud rate

or i have to do more things on program>?

Link to comment

QUOTE (v_pan @ Dec 14 2008, 03:31 AM)

hello everybody..

i made a project based on microcontroller and communicate with 232.

my baud rate is at 115200bps and proved to be very poor for what i want to do.

i'm thinking to change my communication to usb2.0 (microcontroller support )

my question is ..

if i do this ,do i have to change my program on labview?

i mean ..

now i select COM1 to communicate with micro

after change this

the only thing i have to do is to change COM1 to COM4 for example?

and increase baud rate

or i have to do more things on program>?

Hello,

If what you changed is just adding a RS232 to USB2.0 converter, like what you have said it shows up as COM4, then nothing on speed will improve, even though it is connected to USB port and use a USB cable, but underlying communication protocal is same, it is still RS232. To fully make use of USB protocal, you need to use a true USB device, not a simulated COM port. Regarding the LabVIEW code, yes, you only need to change COM1 to COM4 if you use a RS232 to USB converter, no other code changes needed.

Irene

Link to comment

i will use a PIC microcontrolle that supports USB2.0 hardware.i will make software of USB protocal .

so, output from PIC will be a usb cable (not rs232 to usb converter) and i 'll plug it to one of my usb2.0 port

on my computer

in that case, will LABVIEW recognise this PORT as serial(COM4 for example) or usb?

can i increase speed that way?

thanks for answer!!

Link to comment

QUOTE (v_pan @ Dec 14 2008, 04:53 AM)

i will use a PIC microcontrolle that supports USB2.0 hardware.i will make software of USB protocal .

so, output from PIC will be a usb cable (not rs232 to usb converter) and i 'll plug it to one of my usb2.0 port

on my computer

in that case, will LABVIEW recognise this PORT as serial(COM4 for example) or usb?

can i increase speed that way?

thanks for answer!!

Well, it depends on what firmware you implemented in the hardware. If you have COM type firmware, then it is just a RS232 to USB converter. For a true USB2.0 device, you should be able to stream your data very fast.

Irene

Link to comment
  • 2 months later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.