Link (Pixy2JavaAPI API)

All Known Implementing Classes:

I2CLink, SPILink, UARTLink
```
public interface Link
```
Java Port of Pixy2 Arduino Library Link interface for connecting to Pixy2 https://github.com/PseudoResonance/Pixy2JavaAPI

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	Closes link
`int`	`open(int arg)`	Opens link
`int`	`receive(byte[] buffer, int length)`	Receives and reads specified length of bytes over link
`int`	`receive(byte[] buffer, int length, Pixy2.Checksum cs)`	Receives and reads specified length of bytes over link
`int`	`send(byte[] buffer, int length)`	Writes and sends buffer over link

- Method Detail
  - open
```
int open(int arg)
```
    Opens link
    
    Parameters:
    
    arg - Link argument
    
    Returns:
    
    Returns state
  - close
```
void close()
```
    Closes link
  - receive
```
int receive(byte[] buffer,
            int length,
            Pixy2.Checksum cs)
```
    Receives and reads specified length of bytes over link
    
    Parameters:
    
    buffer - Byte buffer to return value
    
    length - Length of value to read
    
    cs - Checksum
    
    Returns:
    
    Length of value read
  - receive
```
int receive(byte[] buffer,
            int length)
```
    Receives and reads specified length of bytes over link
    
    Parameters:
    
    buffer - Byte buffer to return value
    
    length - Length of value to read
    
    Returns:
    
    Length of value read
  - send
```
int send(byte[] buffer,
         int length)
```
    Writes and sends buffer over link
    
    Parameters:
    
    buffer - Byte buffer to send
    
    length - Length of value to send
    
    Returns:
    
    Length of value sent