Difference between revisions of "Arduino"
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=== Test Communication === | === Test Communication === | ||
− | + | Arduino boards Duemilanove and newer feature an LED attached to pin 13. We can verify communication by changing the state of pin 13 and confirming the LED changes. Setting pin 13 HIGH requires setting the <code>Arduino-Switch-State</code> to 32 (i.e. 2^5) in the <code>Device/Property Browser</code>. If you added the <code>Arduino-Shutter</code> peripheral to the <code>Arduino-Hub</code> toggle the <code>Arduino-Shutter</code> in the main MM window, or if you don't have it change the <code>Arduino-Switch-State</code> back to 0 to see the LED go off. | |
== Usage Notes == | == Usage Notes == |
Revision as of 17:11, 13 July 2014
Summary: | Adapter for the Arduino electronics prototyping platform |
---|---|
Author: | Nico Stuurman |
License: | LGPL |
Platforms: | Linux, Mac, and Windows |
Since version: | 1.3.18 |
Automated Serial Port Setup: | Yes |
Peripheral device discovery: | No |
Wiki page: | Nico Stuurman Pariksheet Nanda Roy Wollman |
The Arduino is a low cost programmable digital IO board. It has some digital inputs and digital outputs and can communicate with the computer through a serial interface (that is hidden in a USB connection). A very nice and simple programming language makes the Arduino very simple to program. The Micro-Manager interface to the Arduino consists of an Arduino program (the 'firmware') that you need to upload to the Arduino first. The current version of the Micro-Manager has facilities to use the Arduino as a shutter, and as a shutter that only opens when a TTL is set high (for instance, when the camera is exposing). Also, timed sequences of TTL output can be setup. There are also facilities for programmable analogue out, however, those need connection of a DA chip and requires constructions of a 'daughterboard'/'shield'.
(Image source .svg file)Contents
Installation
Arduino Software
Download and install the Arduino Software for your platform. Establish a connection with your Arduino using the instructions that come with the Arduino software (this includes installing a driver for the USB to serial adapter built into the Arduino.
Firmware
Then download the firmware source code and copy into the Arduino editor. Send to the Arduino, and your Arduino is programmed to work with Micro-Manager.
Hardware Configuration Wizard
Hub
Add the Arduino-Hub. You may want to set the "Verbose" property of the port to 0 to avoid extensive logging of the communcation with the device, especially if you are using the input functionality (which queries the Arduino every second).
Pre-Initialization Properties | Description |
---|---|
Logic | Inverted causes digital inputs and outputs to be considered HIGH when 0 Volts and LOW when +5 Volts. |
Serial Setting | Value |
---|---|
AnswerTimeout | 500 |
BaudRate | 57600 |
DelayBetweenCharsMs | 0 |
Handshaking | Off |
Parity | None |
StopBits | 1 |
Verbose | 0 |
Peripheral Devices Setup
Name | Description |
---|---|
Arduino-Switch | Digital output pattern set across pins 8 to 13. See usage in #Digital IO |
Arduino-Shutter | Toggles the digital outputs pattern across pins 8 to 13. Set all pins off when the shutter is closed, and restores the value set in Switch-State when the shutter is opened.
|
Arduino-Input | Reports, both, the digital and analog (0-1023) state of the analog input pins 0 to 5. |
Arduino-DAC{1,2} | (Not usually used) Reserved for TLV5618 AOTF Peripheral. There does not appear to be any documentation of this peripheral and seems to be a bespoke AOTF control board built for UCSF. |
Initialization Properties | Description |
---|---|
Pin | Reads all 6 input pins when set to All, otherwise reads the individual 0-5 Pin number. |
Pull-Up-Resistor | Choose whether the Arduino should use its internal 20 kOhm internal pull-up resistor. If not sure, choose On. |
Test Communication
Arduino boards Duemilanove and newer feature an LED attached to pin 13. We can verify communication by changing the state of pin 13 and confirming the LED changes. Setting pin 13 HIGH requires setting the Arduino-Switch-State
to 32 (i.e. 2^5) in the Device/Property Browser
. If you added the Arduino-Shutter
peripheral to the Arduino-Hub
toggle the Arduino-Shutter
in the main MM window, or if you don't have it change the Arduino-Switch-State
back to 0 to see the LED go off.
Usage Notes
Switch Mode
When used directly (not via trigger mode) the Arduino Shutter is the device that will change the voltage on the pins specified by the State of the Arduino-Switch (as described above). You'll need to add three devices to your configuration, the hub the switch and the shutter. The Hub takes care of all communication and you don't need to worry about it. The Switch is where you set the pattern you want and opening/closing the shutter will actually change the voltage on the pins as determined by the Switch pattern.
Digital IO
You'll need to think in binary to get this right, meaning that to get pin 13 to open, you need to flip bit 5 which means you want to send 2^5 = 32. Similarly pin 10 will be bit 2 which is 2^2=4.
Bit 1 corresponds to Arduino output pin 8, bit 2 corresponds to output pin 9, etc... Bits 7 and 8 are not used. e.g. setting the switch to value '5', will set output pins 8 and 10 high and the others low.
Here is a simple table Nico send to the mailing list in an email to help (me :) with powers of 2:
bit | pin | nr when high |
---|---|---|
0 | 8 | 1 |
1 | 9 | 2 |
2 | 10 | 4 |
3 | 11 | 8 |
4 | 12 | 16 |
5 | 13 | 32 |
Device Properties
Properties | Description |
---|---|
Switch-Blank On | Allows Low or High. |
Switch-Blanking Mode | Allows On or Off. |
Switch-HubID | |
Switch-Label | Allows 0-63. |
Switch-Sequence | Allows On or Off. |
Switch-State | Allows 0-63. |
Input-AnalogInput{0:5} | 10-bit value of ADC input. |
Input-DigitalInput | Value depends on how the Pin initialization property was set. Shows binary state of the input pin, if a single in was selected. Shows the 5-bit value of all input pins if "All" was selected.
|
Input-HubID | |
DAC{1,2}-HubID | |
DAC(1,2}-Volts |
Project Tutorials
- TTL control of multiple LEDs by David Knecht.
- Detect tube lens position of Nikon Ti Eclipse
- Control laser shutter with Arduino by Rocco D'Antuono.