Teensy++2.0 + openocd + OS X

Development Boards Arduino
1

I’m looking for some help running openocd with Teensy++2.0 (Arduino) using a MacBook/snow leopard.

Objective:

Run JTAGenum on teensy++2

Tool Chain:

MacBook 1,1 (32-bit), OSX:10.6.6

Open On-Chip Debugger 0.4.0 built with --enable-ft2232_ftd2xx --enable-usbprog

Teensy++2.0, loaded with JTAGenum.pde

Problem:

I’ve run into problems getting openocd to communicate with the Teensy++2. Right now I’m working with my own paired down .cfg file (refer below) but get the following error messages when running openocd:

Warn : Unable to open FTDI Device tried: ‘libftd2xx’ and ‘libftd2xx A’

Error: unable to open ftdi device: 2

Error: ListDevices: 0

Troubleshooting Actions:

I’ve gone through some of the other threads and followed up on those suggestions.

  • I believe I’ve have the correct ftdi drivers installed, openocd was built with these added into the configure file.

  • I also addressed the kernel driver “FTDIUSBSerialDriver.kext” both with load/unload commands and selected deletion of that file to remove the A port.

  • I’ve tested most of the .cfg files that come with the openocd installation and these all fail to get the openocd running.

Question:

  1. The Teensy++2 appears as a modem on the system; is this a problem?

/dev/cu.usbmodem12341 /dev/tty.usbmodem12341

  1. The Teensy++2 doesn’t use a FTDI chip, could it still be using the ft2232 driver? Or am I going down the wrong path?

  2. The main chip AT90USB1286 user guide doesn’t give any clear indication of what driver to use with the USB and I didn’t see any references in the openocd guide.

Any help would be appreciated

Thanks

Attached Additional Background Information…

========================================================

BUILDING OPENOCD TEENSY++2.CFG FILE:

#daemon configuration

telnet_port 4444

#interface

interface ft2232

ft2232_device_desc libftd2xx

ft2232_layout usbjtag

ft2232_vid_pid 0x16c0 0x0483

========================================================

INSTALL OS X D2XX LIBRARY VERSION 1.0.2

  • Followed ReadMe instructions from D2XX1.0.2.dmg

  • Installed library for snow leopard:

D2XX1.0.2/D2XX/bin/10.5\ -\ 10.6/libftd2xx.1.0.2.dylib

  • Verified files and links are installed:

-rwxr-xr-x@ 1 root wheel … /usr/local/include/ftd2xx.h

-rwxr-xr-x@ 1 root wheel … /usr/local/lib/libftd2xx.1.0.2.dylib

lrwxr-xr-x 1 root wheel … /usr/local/lib/libftd2xx.dylib → /usr/local/lib/libftd2xx.1.0.2.dylib

-rwxr-xr-x@ 1 root wheel … /usr/local/include/WinTypes.h

========================================================

BUILDING & VERIFY CORRECT VERSION OF OPENOCD USING “MACPORT”

  • Installed & linked FTID2 drivers: libftd2xx.1.0.2.dylib

  • Found port configuration file for openocd

$ sudo port dir openocd /opt/local/var/macports/sources/rsync.macports.org/release/ports/cross/openocd

  • Opened the “Portfile” under that directory

  • Found the configuration line and made the following edits:

Replace “–enable-ft2232_libftdi” with --enable-ft2232_ftd2xx

Added --enable-usbprog

  • Save Portfile

  • Build the program

$ sudo port install openocd

_ The openocd compiled and installed OK

  • Verify that openocd is using the correct driver.

$ otool -L /opt/local/bin/openocd

/opt/local/bin/openocd:

/opt/local/lib/libusb-0.1.4.dylib (compatibility version 9.0.0, current version 9.4.0)

/opt/local/lib/libusb-1.0.0.dylib (compatibility version 1.0.0, current version 1.0.0)

/usr/local/lib/libftd2xx.1.0.2.dylib (compatibility version 0.1.0, current version 1.0.2)

/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 125.2.1)

2

The main chip AT90USB1286 user guide doesn’t give any clear indication of what driver to use with the USB and I didn’t see any references in the openocd guide.

There is no driver for it, probably the only way is to use external jtag adapter.