path: root/digital/dev2/doc/dev2.txt
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Diffstat (limited to 'digital/dev2/doc/dev2.txt')
1 files changed, 31 insertions, 0 deletions
diff --git a/digital/dev2/doc/dev2.txt b/digital/dev2/doc/dev2.txt
index 3ae9a0e2..0c3b7f28 100644
--- a/digital/dev2/doc/dev2.txt
+++ b/digital/dev2/doc/dev2.txt
@@ -13,6 +13,9 @@ serial ports, you should load the generic serial driver:
Then look at kernel messages to locate the new serial devices (/dev/ttyUSBx).
+If two functions are presents in the same firmware, two serial devices should
+be detected.
Controlling the output
@@ -24,9 +27,37 @@ You can also use it to deselect an output so that no current flows into it.
It can also be used to control GPIO when available in the loaded firmware.
+To select an output:
+ -s *1 to 4*
+To make all output unconnected:
+ -u
+Before powering off connected boards, you should deselect outputs so that it
+is not powered by dev2 I/O pins.
About the vendor and product ID
They come from LUFA, the USB library we use for dev2. This is not supposed to
be done in a commercial USB product, but this is OK for hobbyists. That's why
dev2ctl parses the product name to make sure it talks to the right device.
+Changing firmware
+The dev2 firmware can be updated using the USB bootloader. First of all,
+switch the board in DFU mode:
+ --dfu
+Then you can use a DFU programmer to update the firmware. For example:
+ dfu-programmer at90usb162 erase
+ dfu-programmer at90usb162 flash dev2_gpio.hex
+Then the uploaded firmware can be started and used directly:
+ dfu-programmer at90usb162 start