topic Re: LPC1769 MCU target - USB info in LPCXpresso IDE

LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:53 GMT

Content originally posted in LPCWare by mayur.p.85 on Wed Apr 17 07:33:27 MST 2013
Hi All,

I am new to LPCXpresso board. I have just done implemented some small playground projects using FreeRTOS of LED blinking on the target board.
Basically, Now I am wondering that is it really possible to connect the target
board to the PC to switch to play with various USB device? I actually found
some threads that I need to solder USB mini - b wires to the MCU board USB pins and after that I can just connect MCU target to the PC. Can anybody advise me (Please can anybody double-check with the mapping I think is correct or not and could be just directly connected to the corresponding USB lines. VIO -> J6 - 28 , USBD+ -> J6-36, USBD- -> J6-37, GND -> J6-54) .

Can anybody also let me know that whether LPCOpen Platform USB stack and its USB Class drivers can be just used directly with this MCU target without having a need of LPCXpresso base board?

If I cant use LPCOpen USB stack and drivers then can anyone let me know which stack and drivers are available for it?

Regards,
Mayur

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:54 GMT

Content originally posted in LPCWare by R2D2 on Wed Apr 17 10:36:58 MST 2013

Quote: mayur.p.85
Can anybody advise me (Please can anybody double-check with the mapping I think is correct or not and could be just directly connected to the corresponding USB lines. VIO -> J6 - 28 , USBD+ -> J6-36, USBD- -> J6-37, GND -> J6-54) .

Minimal USB Connection is:

D- J6-36
D+ J6-37
GND J6-54

Don't connect USB-VCC, it's 5V.

Quote: mayur.p.85
Can anybody also let me know that whether LPCOpen Platform USB stack and its USB Class drivers can be just used directly with this MCU target without having a need of LPCXpresso base board?

You don't need a base board, except USB connector, everything is on your target board.

Quote: mayur.p.85
If I cant use LPCOpen USB stack and drivers then can anyone let me know which stack and drivers are available for it?

There are several RDB samples in your Example folder...

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:55 GMT

Content originally posted in LPCWare by mayur.p.85 on Wed Apr 17 11:31:59 MST 2013

Quote: R2D2
Minimal USB Connection is:

D- J6-36
D+ J6-37
GND J6-54

Don't connect USB-VCC, it's 5V.

What does this mean? What shall I do with USB-VBus line of USB connector?

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:56 GMT

Content originally posted in LPCWare by R2D2 on Wed Apr 17 12:16:16 MST 2013

Quote: mayur.p.85
What does this mean? What shall I do with USB-VBus line of USB connector?

Don't connect it. Or are you building a self powered device :confused:

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:56 GMT

Content originally posted in LPCWare by mayur.p.85 on Wed Apr 17 12:45:06 MST 2013

Quote: R2D2
Don't connect it. Or are you building a self powered device :confused:

No, I am interested in bus powered device at the moment.

Btw, I also looked at the LPCOpen projects provided by NXP, which seems to does not include any demo for USB stack with LPC17xx controllers for LPCXpresso.

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:57 GMT

Content originally posted in LPCWare by R2D2 on Wed Apr 17 12:53:29 MST 2013

Quote: mayur.p.85
No, I am interested in bus powered device at the moment.

Then you've to connect USB-VCC to your voltage regulator, of course.

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:57 GMT

Content originally posted in LPCWare by daniel.widyanto on Wed Apr 17 20:49:31 MST 2013
See Fig 28 from LPC1769 datasheet (http://www.nxp.com/documents/data_sheet/LPC1769_68_67_66_65_64_63.pdf) for recommended connection.

You need:
- VBUS pin - So internal USB peripheral can detect whether the USB is attached
- D+ pin
- D- pin
- GND
- USB_CONNECT pin - Optional, but recommended. So you can delay the USB enumeration until the MCU is ready.
- USB_UP_LED pin - Optional for those who likes indicator if USB is enumerated successfully.

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:58 GMT

Content originally posted in LPCWare by mayur.p.85 on Thu Apr 18 01:23:20 MST 2013
-

Quote: daniel.widyanto
VBUS pin - So internal USB peripheral can detect whether the USB is attached

Yes this is what I was thinking, that if I dont connect VBus then How Can I ditinguish between Reset and Suspend bus states for self-powered device... But I am not clear to which pin of MCU I should connect it?

-

Quote: daniel.widyanto
USB_CONNECT pin - Optional, but recommended. So you can delay the USB enumeration until the MCU is ready.

What additionally I require to do it, Actually I have seen the diagram in the datasheet but didnt quite understood to do this, as this would be good idea to have it...

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:59 GMT

Content originally posted in LPCWare by R2D2 on Thu Apr 18 01:55:54 MST 2013
No Google in your Germany?

http://www.keil.com/mcb1700/mcb1700-schematics.pdf

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:53:59 GMT

Content originally posted in LPCWare by mayur.p.85 on Thu Apr 18 07:04:10 MST 2013

Quote: R2D2
No Google in your Germany?

http://www.keil.com/mcb1700/mcb1700-schematics.pdf

Everything is here but I want to be sure that what I would do should not just block my activities for few days... as well I dont have much knowledge on LPCXpresso board and MCU..
Anyway thanks for the help...

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:54:00 GMT

Content originally posted in LPCWare by mayur.p.85 on Sat Apr 20 08:44:45 MST 2013
Everything works fine now.... Could enumerate USBCDC device... great help... thanks...

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:54:01 GMT

Content originally posted in LPCWare by fp7253 on Sat May 25 02:42:37 MST 2013

Quote: mayur.p.85
Everything works fine now.... Could enumerate USBCDC device... great help... thanks...

HI,
I have problem with USBCDC example of LPCXpresso 1769, IDE CodeRed 5.2.4 : The USBCDC.xaf is 368K size, too big for the licence debugger LPC_LINK .
Does somebody know what to do to reduce the size less than 128 K , (limit of the licence lpcxpresso)
thank's to all
F.P.

Re: LPC1769 MCU target - USB info

lpcware — Thu, 16 Jun 2016 00:54:01 GMT

Content originally posted in LPCWare by R2D2 on Sat May 25 03:18:34 MST 2013

Quote: fp7253
The USBCDC.xaf is 368K size...

That's not the code size :) See: http://www.support.code-red-tech.com/CodeRedWiki/FlashRamSize

Quote: fp7253
Does somebody know what to do to reduce the size ...

Optimization with Release Build... See:http://www.support.code-red-tech.com/CodeRedWiki/CompilerOptimization