FireflyApi2 hardware

3.3.1 GPIO

Gpio control

Function：public boolean gpioCtrl(int gpio, String direction, int value)
Description：Control gpio
Parameters：gpio  Gpio number
　　　　　　direction in, out
　　　　　　value 1/0
Return：true (success)/ false(false)
Example：
boolean success = mFireflyApi2.gpioCtrl(150,"out",1);//GPIO4_C6 gpio the node is 150

Read the value of gpio

Function：public int gpioRead(int gpio)
Description：Read the value of gpio
Parameters：gpio Gpio number
Return：Returns -1 when the read fails
Example：
int gpioValue = mFireflyApi2.gpioRead(150);//GPIO4_C6 gpio the node is 150

Check if the gpio port is occupied by the system

Function：public boolean isGpioOccupied(int gpio)
Description：Check if the gpio port is occupied by the system
Parameters：gpio Gpio number
Return：true(occupied)/false(free)
Example：
boolean occupied  = mFireflyApi2.isGpioOccupied(150);//GPIO4_C6 gpio the node is 150

Parse the node value of gpio

Function：public int gpioParse(String gpioStr)
Description：Parse the node value of gpio, for example GPIO4_C6 is converted to node 150
Parameters：gpioStr
Return：Returns -1 when the parse fails
Example：
int gpioValue= mFireflyApi2.gpioParse("GPIO4_C6");//GPIO4_C6 gpio the node is 150

Remove gpio node

Function：public boolean gpioRemove(int gpio)
Description：Remove gpio node
Parameters：gpio
Return：remove fail return -1
Example：
boolean success = mFireflyApi2.gpioRemove(150);//GPIO4_C6 node is 150

3.3.2 Serial port usage

Import header file

import com.firefly.api2.serialport.SerialHelper2;

Open the serial port according to the path and baud rate, and set the callback function

private SerialHelper2 serialHelper;
private boolean openSerialPort(String path,int baudrate)
{
    ......
    serialHelper = new SerialHelper2(path, baudrate) {
        @Override
        protected void onDataReceived(final byte[] data) {
            //Hexadecimal
            Log.v(TAG,serialHelper.getPort()+" onDataReceived:"+ ByteUtil.ByteArrToHex(data).trim());
            //Strings
            Log.v(TAG,serialHelper.getPort()+" onDataReceived-String:"+ new String(data, 0,data.length).trim());
        }
    };

    try {
        serialHelper.open();
        return  serialHelper.isOpen();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return false;
}

Send a string to the serial port
```
serialHelper.sendTxt("112233445566");
```

Send hexadecimal to serial port

//such as 0x11,0x22,0x33,0x44,0x55,0x66
serialHelper.sendHex("112233445566");

Close the serial port
```
serialHelper.close();
```

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