topic Re: LPCXpresso 1769 USB VCOM or CDC (example) in LPCXpresso IDE

LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:30 GMT

Content originally posted in LPCWare by cell85 on Sat Mar 03 11:17:47 MST 2012
Hi,

I want to use the LPCXpresso 1769 USB Port as a Virtual Com Interface (VCOM).
I allready soldered the USB mini Port with 330Ohm Resistors on the Pin's of the 1769. (D- / D+, VinExt, GND)

At the moment I'm using UART2 with 115Kbaud to transmit Data to my PC via a Sparkfun USB-2-Serial Bridge (FTDI).

Do you guys have an working project or an example (I didnt find any) to use the LPCXpresso USB as a VCOM Device?

Thank you!

WR
Sam

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:30 GMT

Content originally posted in LPCWare by Rob65 on Sat Mar 03 11:50:02 MST 2012
Sam,

see http://bikealive.nl/lpc1754-test.html

On the bottom of that page there is a .zip file (lpc1754_FatFS_test) containing a project usb_FatFS_test. That is actually just the FatFS test program as delived with fatFS but it communicates via USB instead of the uart.
usb_test contains a test program to test the I2C EEPROM, the microSD and the RTC (backup battery) on my board.

Both projects are for an lpc1754 so you will have to chang them a bit for the lpc1769 - but they are fully functional and they should work on the lpc1769 as well (after changing the I/O assignments)

Rob

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:31 GMT

Content originally posted in LPCWare by Ex-Zero on Sat Mar 03 12:06:06 MST 2012

Quote:

I want to use the LPCXpresso 1769 USB Port as a Virtual Com Interface (VCOM).

Surprisingly your example folder is including a sample called USBCDC :rolleyes:

Quote:

I already soldered the USB mini Port with 330Ohm Resistors on the Pin's of the 1769.

Congratulation, then solder them out again :) 33 Ohm resistors are included in LPCXpresso1769 :eek:

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:32 GMT

Content originally posted in LPCWare by cell85 on Sat Mar 03 12:06:48 MST 2012
Thank you,
but this isnt this for mass storage with FatFS and not VCOM data transmitting? :confused:

wr
sam

@Zero and whats with the 1,5K Pullups/down ????

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:33 GMT

Content originally posted in LPCWare by Ex-Zero on Sat Mar 03 12:20:48 MST 2012

Quote:

...whats with the 1,5K Pullups/down ????

All included :eek:

'USB pullup for USB Device operation' See Page 6 of

http://www.embeddedartists.com/sites/default/files/docs/schematics/LPCXpressoLPC1769revB.pdf

If you want to add a simple USB Device nothing more than an USB Connector is necessary :)

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:33 GMT

Content originally posted in LPCWare by cell85 on Sat Mar 03 13:22:04 MST 2012
Thank you Zero :)

all things are working now. The CDC/VCom works fine, i have a bandwith of 15mbit thats awesome!!!!

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:34 GMT

Content originally posted in LPCWare by Rob65 on Sat Mar 03 23:22:46 MST 2012

Quote: cell85
Thank you,
but this isnt this for mass storage with FatFS and not VCOM data transmitting? :confused:

There is actually a third project (usb_bootloader) and that uses mass storage - but not using FatFS but directly to Flash.
There is a nice readme.txt inside that project explaining how to setup your own project(s) to use this USB bootloader but you can always just use the "managed linkerscript" settings on the other projects to download them to flash via LPCXpresso.

What USBCDC example are you using?
The NXP examples use the Keil USB stack - that one is not free and may not be distributed without a license from Keil. I used the LPCUSB stack from Betrik Sikken. This is an open source stack without those limitations.

Rob

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:34 GMT

Content originally posted in LPCWare by cell85 on Sun Mar 04 04:53:30 MST 2012
ok , where is this usb stack?

the problem is that the driver not works .... i used the example from RDB1768 USB CDC.

But it always says driver not recognized.

:(((

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:35 GMT

Content originally posted in LPCWare by cell85 on Sun Mar 04 05:21:43 MST 2012
hte example is from Betrik Rob.

But its not working, the Driver is not accepted by windows

Unknown Device.

And the HardwareID is not recognized. But my Code is running good, no stops or halts.

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:35 GMT

Content originally posted in LPCWare by cell85 on Sun Mar 04 11:14:46 MST 2012
>Please Help!< I Need LPC1769 with usb or I have to switch to STM32 USBfwLib (which i dont really want to :( but my boss will force me)

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:36 GMT

Content originally posted in LPCWare by cell85 on Sun Mar 04 11:27:02 MST 2012
is that configuration ok, for the LPCXpresso 1769 ?

    // P2.9 -> USB_CONNECT
    LPC_PINCON->PINSEL4 &= ~0x000C0000;
    LPC_PINCON->PINSEL4 |= 0x00040000;

    // P1.18 -> USB_UP_LED
    // P1.30 -> VBUS
    LPC_PINCON->PINSEL3 &= ~0x30000030;
    LPC_PINCON->PINSEL3 |= 0x20000010;

    // P0.29 -> USB_D+
    // P0.30 -> USB_D-
    LPC_PINCON->PINSEL1 &= ~0x3C000000;
    LPC_PINCON->PINSEL1 |= 0x14000000;


    // enable PUSB
    LPC_SC->PCONP |= (1 << 31);

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:36 GMT

Content originally posted in LPCWare by Rob65 on Sun Mar 04 12:45:15 MST 2012

Quote: cell85
hte example is from Betrik Rob.

But its not working, the Driver is not accepted by windows

You will need a .inf file to tell Windows that the given VID/PID belong to a serial port and that usbser.sys has to be used. I just discovered that I have forgotten to include this file.
The easy way to do this is to use usbser.inf in C:\nxp\LPCXpresso_X.X.X\lpcxpresso\Examples\NXP\LPC1000\LPC17xx\RDB1768cmsis2.zip\RDB1768cmsis2_usb_serial.

Please note that once you are creating a product you must get your own VID/PID pair and change the .inf file accordingly.

Rob

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:37 GMT

Content originally posted in LPCWare by cell85 on Sun Mar 04 15:10:10 MST 2012
It still says in this folder there is no driver which is made for x64 based systems.

ok i copied now the inf file.

it looks like this:

[Version]
Signature="$Windows NT$"
Class=Ports
ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}
Provider=%MyCompany%
DriverVer=05/20/2010,1.0.0.0

[MANUFACTURER]
%ProviderName%=DeviceList, NTx86, NTamd64

[DeviceList.NTx86]
%MyCompany%=DriverInstall,USB\VID_FFFF&PID_0005

[DeviceList.NTamd64]
%MyCompany%=DriverInstall,USB\VID_FFFF&PID_0005

[DriverInstall]
include=mdmcpq.inf
CopyFiles=FakeModemCopyFileSection
AddReg=LowerFilterAddReg,SerialPropPageAddReg

[DriverInstall.Services]
include = mdmcpq.inf
AddService = usbser, 0x00000002, LowerFilter_Service_Inst

; This adds the serial port property tab to the device properties dialog
[SerialPropPageAddReg]
HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider"

[Strings]
ProviderName = "CDC Driver"
MyCompany= "MYUSB VirtualCom"

but the usbser.sys ist provided in the zip of the keil project. in this RDB inf file there is "include=mdmcpq.inf" is that ok ?

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:38 GMT

Content originally posted in LPCWare by cell85 on Sun Mar 04 15:35:49 MST 2012
Ok guys, maybe the usb initialization ist not working right.

when i click on driverdetails/device details and scrolling down the parameters the VID PID is 0000 0000.

The code is running and there is no halt or error.

But I still think this code from CodeRed Example is not working with the LPC1769.

Does anyone of you guys have a own running LPCXpresso 1769 example project which is testet with drivers?

I really want to import it to see if its a hardware fault.

I directly solderd the usb cable pins to the PCB
Green on USB -
White on USB +
Black on GND
Red on VIN

The Shild of the Cable is not connected

:(

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:38 GMT

Content originally posted in LPCWare by Rob65 on Mon Mar 05 10:44:49 MST 2012

Quote: cell85
but the usbser.sys ist provided in the zip of the keil project. in this RDB inf file there is "include=mdmcpq.inf" is that ok ?

Yes, that is OK. The usbser.sys and mdmcpq.inf are part of Windows.

The whole idea is that the CDC protocol is standard and that the operating system contains a standard device driver for this protocol. You just need to tell windows that the device identified by the given VID/PID should user usbser.sys.

I had both my own version and the standard version from NXP running on my lpc1769 board without any problems.

Rob

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:39 GMT

Content originally posted in LPCWare by cell85 on Mon Mar 05 16:05:33 MST 2012
ok but whats the problem with my system then ?
Is the USB Phy defective ?

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:39 GMT

Content originally posted in LPCWare by Rob65 on Mon Mar 05 23:32:14 MST 2012

Quote: cell85
Is the USB Phy defective ?

It is more likely that you connected the whole thing wrong.

Check out the "Getting Started Manual" that came with the LPCXpresso software, there is a nice picture in there describing how to connect the USB cable.

(I don't know why I did not refer to that the first time :eek:)

Rob

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:40 GMT

Content originally posted in LPCWare by Polux rsv on Tue Mar 06 01:11:18 MST 2012

Quote: cell85

Green on USB -
White on USB +
Black on GND
Red on VIN

Remember (or read the schematics http://ics.nxp.com/support/documents/microcontrollers/pdf/lpcxpresso.lpc1769.schematic.pdf), The 5V Vin pin is connected to the LPC-link, which makes the 3.3V sent back to the LPC1769. Whithout LPC-link, the LPC board running alone should be powered by 3.3V on the "Vout" (J6 pin 28) .

I also had problems with dual CDC. When I download the code and then run/step with the debugger, the PC (Win XP) doesn't recognize the new devices. But if I [B]disconnect[/B] the USB cable (not the LPC-link), run/restart my application and then [B]reconnect[/B] the cable, both CDC devices are detected.

Angelo

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:40 GMT

Content originally posted in LPCWare by medis on Tue Mar 06 01:54:41 MST 2012

Quote: cell85
ok but whats the problem with my system then ?
Is the USB Phy defective ?

Hi

On NXP site are "code.bundle.lpc17xx.keil.zip" package with all sources(LPC17xxSampleSoftware.102\keil\USBCDC) and inf files
But if Your VID and PID are 0000,then driver will not run,because VID PID do not match inf file.

If you put usb wires wrong- usb do not appear on the device manager and shows something "usb device do not recognized" (on the righ bottom win desktop corner)

Try different PC.Yesterday tryed on lpc11u14 device:after usb plug and drivers install,seems enumerating goes without problem and i get com port,but after every usb replug yellow question appeared and always reistall drivers.
But when try send receive-nothing works.Looked with usb snooper-no transaction are going

Switched to other PC and all problems gone.
Now look solution to repair pc or will go system reinstall

br

Re: LPCXpresso 1769 USB VCOM or CDC (example)

lpcware — Thu, 16 Jun 2016 02:08:41 GMT

Content originally posted in LPCWare by Rob65 on Tue Mar 06 02:47:38 MST 2012

Quote: medis
On NXP site are "code.bundle.lpc17xx.keil.zip" package with all sources(LPC17xxSampleSoftware.102\keil\USBCDC) and inf files

Please check the license with the Keil USB code to see if it suits your needs before using it.

I only use LPCUSB. LPCUSB was developed by Bertrik to remove some of the restrictions on the Keil stack.

Also note that just using the 1.5k resistor is not OK as long as you only plug in the USB cable when the USB stack is up and running. As soon as Windows detects the USB cable (through the 1.5k resistor) it will start enumeration of the device - when USB is not running on your device at that time enumeration will fail.
It will work OK if you do as described in the getting started manual with the USB stack being initialized as soon as your main() is entered but when there is a too long delay between power up and USB initialization things will fail.
Use an extra transistor to the USB_CONNECT pin to be less dependent on this.

Rob