Component: Visi (4DSystems) (Comms: System)

Author	Matrix Ltd.
Version	2.0
Category	Comms: System

Visi (4DSystems) component

A way of interacting with the VISI interface designed by 4D systems. VISI firmware must be pre-loaded onto the SD card connected to the display to allow everything to work correctly.

Component Pack

COMMSA

Detailed description

No detailed description exists yet for this component

Examples

These examples are designed to work with a 4D systems display pre-programmed with the VISI Genie runtime files. These files are also included in the example archives to allow you to easily replicate the project.

The 4D display can either be connected to the PC running Flowcode using the 4D USB cable or connected to an embedded Microcontroller using a hardware or software UART. If you are using the Flowcode simulation to communicate with the Visi component then be sure to set the Visi COM port property to the COM port assigned by Windows to the 4D USB Cable.

The Console window should also show some helpful information to aid in debugging any problems.

The first example demonstrates a simple rocker switch Visi component. RockerSwitch The second example demonstrates controlling the colour of an RGB LED using the Visi colour picker component. ColourPicker

Downloadable macro reference

	VisiWriteString
Writes a string to a specific Visi object. Returns 0 for a succesful write operation.
- BYTE	StringIndex
- STRING	StringData
- BYTE	Return

	VisiWriteObject
Writes a value to a specific Visi object. Returns 0 for a succesful write operation.
- BYTE	ObjectID
- BYTE	ObjectIndex
- UINT	Value
- BYTE	Return

	ChangeHWBaud
Changes the hardware UART baud rate allowing for dynamic speed changes.
- BYTE	NewBaud
0=1200, 1=2400, 2=4800, 3=9600, 4=19200, 5=38400, 6=57600, 7=115200
- VOID	Return

	VisiReceive
Waits for an incoming Visi Report Object or Report Event to be sent from the display. A detected incoming message returns 0 and can be read using the VisiReadByteFromMessage macro.
- BYTE	Return

	VisiWriteContrast
Updates the display contrast. Returns 0 for a succesful write operation.
- BYTE	Contrast
Range 0-15, 0=Backlight Off
- BYTE	Return

	VisiWriteVolume
Updates the display volume. Returns 0 for a succesful write operation.
- BYTE	Volume
Range 8-127
- BYTE	Return

	VisiReadByteFromMessage
Reads a byte from a succesful VisiReceive macro. Index: 0=Command, 1=ObjectID, 2=ObjectIndex, 3=ValueMSB, 4=ValueLSB
- BYTE	Index
- BYTE	Return

	VisiReadObject
Reads the value from a specific Visi object. Returns 0 for a sucessful read. Use the VisiReadByteFromMessage macro to pull out the incoming data.
- BYTE	ObjectID
- BYTE	ObjectIndex
- BYTE	Return

	Initialise
Sets up the RS232 peripheral, must be called at the start of your program or at least before you start calling any other RS232 macros.
- VOID	Return

Property reference

	Properties
	Comms Settings
	Channel
UART Channel selector Software channels are bit banged using generic I/O pins but are not as reliable as hardware channels. Hardware channels use the selected peripheral on-board the target microcontroller.
	Baud Options
Baud rate option selector
	Baud Rate
	Connections
	TX
Pin to be used for Transmit data
	RX
Pin to be used for Receive data
	Simulation
	Label
Label shown on the communications flasher component
	Scope Traces
Selects if the scope traces are automatically added to the data recorder window or not. Simulation - draws an approximation of the UART data onto the scope trace. ICT - sets up the scope trace for incoming data and adds UART packet decoding at the correct BAUD.
	Console Data
Selects if the console data is automatically generated or not
	Console Columns
Number of characters that can be displayed on a single line of the console.
	Data Source
Simulation data source used to allow the component to connect to various remote devices Nothing - Simulation data is ignored COM port - Routes the communication data to and from a physical or virtual COM port Injector - Routes the communication data via a data injector component on the Panel.