Component: I2C Slave (Comms: Interface)

Author	Matrix Ltd.
Version	1.3
Category	Comms: Interface

I2C Slave component

Generic Two Wire I2C Communications Interface

Detailed description

No detailed description exists yet for this component

Examples

PIC16F1937 Examples

The slave device is connected to a bank of switches, the master device to a bank of LEDs. The value of the switches is passed to the master LEDs. Master Read Example

Slave Switches Example The slave device is connected to a bank of LEDs, the master device to a bank of switches. The value of the switches is passed to the slave LEDs. Master Send Example

Slave LEDs Example

Arduino Uno Examples

Example program showing how to use the I2C Slave on an AVR Arduino device. I2C Slave Arduino Uno Example

ECIO40P Examples

Example program showing how to use the I2C Slave on an ECIO40P device. Master Example

Slave Example

Downloadable macro reference

	ReceiveByte
Receives a byte from the I²C bus. Returns the data received, and sends either Ack or Nak Set parameter Last as: 1=Last=Nak, 0=Ack=More
- BYTE	Last
Used to signify the last byte when streaming incoming data. 0=Not last byte, 1=Last Byte
- BYTE	Return

	TransmitByte
Sends a byte on the I²C bus. Returns the acknowledge if any. 0 represents that data was acknowledged and 1 represents no acknowledge was detected.
- BYTE	Data
Data byte to send on the I²C bus.
- BYTE	Return

	Check_Status
Returns the Slave Status. Bit 0 = 1 Indicates address/data byte available in the buffer to read Bit 5 = 1 Indicates that the last byte received or transmitted was data (else address)
- BYTE	Return

	Initialise
Enables the I²C hardware and performs some initialization. Should be called at the start of the program or at least before any of the other I²C functions are called.
- VOID	Return

	Initialise
Startup the I2C bus ready for communications.
- VOID	Return

	Transaction_Read
Attempt to read Length number of bytes from the I2C slave to the given Buffer. Ensure that the Buffer is large enough. Returns number of bytes read, caller should check that this matches requested Length
- BYTE	Buffer
Buffer to store the incoming byte data
- UINT	Length
Number of bytes to read
- UINT	Return

	Start
Outputs a start condition onto the I²C bus.
- VOID	Return

	Transaction_Initialise
Initialise the I2C interface to communicate with a Slave device at Address Returns 0 on fail, 1 on success
- BYTE	Address
7-bit I2C Address without the shift for the R/W bit
- BYTE	Return

	Initialise
Enables the I²C hardware and performs some initialization. Should be called at the start of the program or at least before any of the other I²C functions are called.
- VOID	Return

	Initialise
Initialise the sensor configuration as set by the component properties. Sets the default intigration time and gain as well as enable the sensor.
- VOID	Return

Property reference

	Properties
	Channel
Channel selection
	Baud Select
Baud rate option selector
	Baud Rate
Baud rate to be used
	Stop Delay
On older microcontroller devices there is a potential for the I2C hardware channel to lock up if there is not a 10ms delay between an I2C stop event and the next I2C start event. Most modern microcontrollers will not have a problem so this property can be disabled to speed up the I2C communications.
	Slave Address
	Mask
0 - don't care; 1 - perform match; So address of 0x30 and mask of 0xF0 will allow the slave to respond to addresses of 0x30, 0x31, 0x32, …, 0x3F
	Connections
	SDA
Pin used for SDA (data signal)
	SCL
Pin used for SCL (clock signal)
	Simulations
	Label
Label shown on the comms flasher on the simulation panel.
	Scope Traces
Selects if the scope traces are automatically generated or not
	Console Data
Selects if the console data is automatically generated or not
	API