Relaxed Electrophysiological Data Acquisition,
Control, and Stimulation

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AmplifierControl  [Control]  [EPhys Plugins] Controls an amplifier: buzzer and resistance measurement. Author Jan Benda Version 3.0 (Oct 5, 2015) Options initmode=Bridge: Initial mode of the amplifier (string) resistancecurrent=1nA: The average current of the amplifier used for measuring electrode resistance (number) adjust=false: Adjust input gain for resistance measurement (boolean) maxresistance=100MOhm: Maximum resistance to be expected for scaling voltage trace (number) buzzpulse=500ms: Duration of buzz pulse (number) showbridge=true: Make bridge mode for amplifier selectable (boolean) showcc=false: Make current clamp mode for amplifier selectable (boolean) showdc=false: Make dynamic clamp mode for amplifier selectable (boolean) showvc=false: Make voltage clamp mode for amplifier selectable (boolean) showmanual=false: Make manual mode for amplifier selectable (boolean) syncpulse=10us: Duration of SEC current injection (number) syncmode=0samples: Interval is average over (integer); Key shortcuts Z: Buzz .: Buzz O: Measure resistance ("O" is the shortcut of "Ohm"!) ALT-B: Switch amplifier to bridge mode ALT-C: Switch amplifier to current-clamp mode ALT-Y: Switch amplifier to dynamic-clamp mode ALT-V: Switch amplifier to voltage-clamp mode ALT-A: Switch to manual selection of amplifier mode Use a presenter to control RELACS You can map key presses of a presenter to keys RELACS understands as follows: Look in /lib/udev/hwdb.d/60-keyboard.hwdb for your presenter/keyboard Copy the lines to a file 70-keyboard-relacs.hwdb in /etc/udev/hwdb.d/ Edit these lines according to your needs. Each line maps a scancode (as hex-value) to a keycode (lower case). For example, the four buttons of a Logitech R400 can be remapped as follows: # Logitech Presenter R400 keyboard:usb:v046DpC52Dd*dc*dsc*dp*ic*isc*ip*in00* KEYBOARD_KEY_7004B=space KEYBOARD_KEY_7004E=f1 KEYBOARD_KEY_70029=dot KEYBOARD_KEY_7003E=dot KEYBOARD_KEY_70037=v With this, the "arrow left" terminates the running repro gracefully by sending "space". "arrow right" starts the macro bound to the "F1" key, the "start presentation" button activates the buzzer, and the "blank screen" button centers the traces in the plot. inform your system about the new key bindings (as root): # udevadm hwdb --update and then you need to reboot (!) so that these key mappings take into effect to find out what scancodes your device emits use (as root) # evtest possible keycodes are listed at http://hal.freedesktop.org/quirk/quirk-keymap-list.txt or in the header file /usr/include/linux/input.h (the long section with the #define KEY_1 etc.

Last modified: Wed Jun 13 16:31:13 CEST 2018