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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/openocd.texi | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi index 4db8698b..b944912c 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -250,12 +250,16 @@ and has a built in relay to power cycle targets remotely. @section Choosing a Dongle -There are three things you should keep in mind when choosing a dongle. +There are several things you should keep in mind when choosing a dongle. @enumerate -@item @b{Voltage} What voltage is your target? 1.8, 2.8, 3.3, or 5V? Does your dongle support it? -@item @b{Connection} Printer Ports - Does your computer have one? -@item @b{Connection} Is that long printer bit-bang cable practical? +@item @b{Voltage} What voltage is your target - 1.8, 2.8, 3.3, or 5V? +Does your dongle support it? You might need a level converter. +@item @b{Pinout} What pinout does your target board use? +Does your dongle support it? You may be able to use jumper +wires, or an "octopus" connector, to convert pinouts. +@item @b{Connection} Does your computer have the USB, printer, or +Ethernet port needed? @item @b{RTCK} Do you require RTCK? Also known as ``adaptive clocking'' @end enumerate @@ -356,6 +360,10 @@ The two well known ``JTAG Parallel Ports'' cables are the Xilnx DLC5 and the MacGraigor Wiggler. There are many clones and variations of these on the market. +Note that parallel ports are becoming much less common, so if you +have the choice you should probably avoid these adapters in favor +of USB-based ones. + @itemize @bullet @item @b{Wiggler} - There are many clones of this. |