LabVIEW Interface for Arduino Packets

[Kristoff2]

Below is a table containing information about how the LIFA packets are built.  This is a work in progress as of 6/27 and should be completed soon.  Please let me know if you have any questions about this (most people won't need to worry about how this works under the hood.  This is for the benefit of advanced users).

Function	Description	Header	Command	ARG0	ARG1	ARG2	ARG3	ARG4	ARG5	ARG6	ARG7	ARG8	ARG9	ARG10	ARG11	ARG12	Checksum	Return
Sync	Used to synchronize LabVIEW and the Arduino (Required in wireless mode).	0xFF	0x00	x	x	x	x	x	x	x	x	x	x	x	x	x	Checksum	"sync"
Flush	Flush serial buffer on Arduino.	0xFF	0x01	x	x	x	x	x	x	x	x	x	x	x	x	x	Checksum	None
Set Pin Mode	Sets digital pin mode as input or output.	0xFF	0x02	PIN	MODE: 0 - INPUT 1 - OUTPUT	x	x	x	x	x	x	x	x	x	x	x	Checksum	0x00
Write Digital Pin	Writes a value to digital I/O pin.	0xFF	0x03	PIN	Value: 0 - LOW 1 - HIGH	x	x	x	x	x	x	x	x	x	x	x	Checksum	0x00
Write Digital Port	Writes a value to digital I/O pins 0 - 13.  Each bit represents a pin value from MSB (Pin 13) to LSB (Pin 0)	0xFF	0x04	PIN 13- 8	PIN 7 - 0	x	x	x	x	x	x	x	x	x	x	x	Checksum	0x00
Tone	Generates a square wave of the specified frequency (and 50% duty cycle) on the specified pin.	0xFF	0x05														Checksum	0x00
Read Digital Pin	Reads the value of a digital input pin.	0xFF	0x06														Checksum
Read Digital Port	Reads the value of digital input pins 0 - 13.	0xFF	0x07														Checksum
Read Analog Pin	Reads the analog voltage of the specified analog input pin.	0xFF	0x08														Checksum
Read Analog Port	Reads the analog voltage of analog input pins 0-5.	0xFF	0x09														Checksum
Write PWM Pin	Writes a PWM signal with the specified duty cycle on the specified PWM pin.	0xFF	0x0A														Checksum
Write PWM Port	Writes a PWM signal to three PWM pins.	0xFF	0x0B														Checksum
Config Seven Seg	Configures pins to use with seven segment display.	0xFF	0x0C														Checksum
Write Seven Seg	Writes a character to the seven segment display.	0xFF	0x0D														Checksum
I2C Init	Initialize I2C and join the bust as master.	In0xFF	0x0E														Checksum
I2C Send	Send I2C data.	0xFF	0x0F														Checksum
I2C Read	Read I2C data.	0xFF	0x10														Checksum
SPI Init	Initialize the SPI bus.	0xFF	0x11														Checksum
SPI Set Bit Order	Set data transmission bit order.	0xFF	0x12														Checksum
SPI Set Clock Divider	Set SPI clock divider.	0xFF	0x13														Checksum
SPI Set Data Mode	Set SPI data mode	0xFF	0x14														Checksum
SPI Send / Receive	Send and Receivce SPI data	0xFF	0x15														Checksum
SPI Close	Close SPI Bus	0xFF	0x16														Checksum
Set Num Servos	Set the number of servos to use in your application and dynamically allocate memory for them.	0xFF	0x17														Checksum
Config Servo	Configure servo by setting which pin to use and angle range limits.	0xFF	0x18														Checksum
Servo Write Angle	Write a target angle for the specified servo.	0xFF	0x19														Checksum
Servo Read Angle	Read the last target angle sent to the servo.	0xFF	0x1A														Checksum
Servo Write uS Pulse	Write a uS pulse for the specified servo.	0xFF	0x1B														Checksum
Servo Read uS Pulse	Read the last uS pulse width sent to the specified servo.	0xFF	0x1C														Checksum
Servo Detach	Detach the specified servo so that the DIO pin is free to be used for DIO.	0xFF	0x1D														Checksum

[A.Fiore]

Hello, i think this packets are great and could solve some problems i found trying to connect LabVIEW and Arduino for a project.

I started to use LIFA and i found a mistake in the definition of the number of "analog pin" for the Arduino Mega 2560: there are 16 analog pin and not only 8. I had to modify the "Analog Pin.ctl" and "Check for pin out of range.vi" to make it work properly.

I got also a question: i have to read a sensor with a frequency output, i've already made an attempt using only arduino reading a digital pin and using the function "pulseIN". how can i do this using LabVIEW? is it possible to use on of the packet in the table?

Thank you

Andrea

[N8DMT]

Is an updated version of the LIFA Packets table available?  Looking for additional info on the stepper motor commands (30 and up).

[Gerry99]

Could you added command for reading intterupt pin in arduino ?? So labview could read and count for RPM measurement..

it's still common problems..

Thanks

Gerry