usbd_lib_cdc LPCXpresso 1769

lpcware — Wed, 15 Jun 2016 22:26:27 GMT

Content originally posted in LPCWare by capstone on Mon Jun 23 13:33:50 MST 2014
Previously posted in the LPC Open forum and closed as in the wrong forum.

LPC Open v2.10/LPCXpresso v7.2.0/Windows 7/64

Has anyone had success connecting the USB with usbd_lib_cdc built on the Xpresso Base Board?

If so, will you please share the details/changes/file.inf etc.

Also, I have a question about the underlying library usbd_175x_6x_lib: is there any reason that this library would not support an alternate build for the Code Red RDB1768R2 Development Board?

Thanks!

Resolved.

After much searching I have resolved the connection problem.

First of all, it appears that the USB_CONNECT is not biased by the v2.10 lpc_board_nxp_lpcxpresso_1769/board.c/Board_USBD_Init procedure to make the usb visible to the host.

Adding this line provides the bias to the D+ signal line:

void Board_USBD_Init(uint32_t port)
{
/* set a bias to this pin to enable the host system to detect and begin enumeration */
Chip_IOCON_PinMux(LPC_IOCON, 2, 9, IOCON_MODE_INACT, IOCON_FUNC1);  /* USB_CONNECT */

http://www.lpcware.com/content/forum/lpcxpresso-lpc1769-usbcdc-example

The next may or may not be an issue, depending on the target system. There was no INF file matching the requirements of
VID = 0x1FC9 and PID = 0x83 found in the lpc-ucom-vcom.inf file. The following link provides several development interface files:

http://www.lpcware.com/content/nxpfile/lpcopen-software-platform-usbd-library-drivers-windows

All's well now for the lpc_board_nxp_lpcxpresso_1769 build.

topic usbd_lib_cdc LPCXpresso 1769 in LPCXpresso IDE

usbd_lib_cdc LPCXpresso 1769