6LoWPAN C Click Board

Code examples for the 6LowPAN C Click Board™, written for MikroElektronika hardware and compilers are available on Libstock.

Note: The full 6LoWPAN stack is not currently implemented in our libraries. However, there are functionalities for sending and receiving data packets, as well as for setting the network ID and 16-bit addresses for individual devices. 

CODE SNIPPET

This code snippet, taken from the 6LowPAN C Click Board™ example for clicker 2 for MSP432, shows how data is transmitted and received between two MCUs using 6LoWPAN clicks.

The value of _RECEIVER_ determines whether the MCU will behave as a receiver or a transmitter. RF channel, PAN ID, and individual addresses are also defined.

There is an interrupt routine for detecting a button press, which is used in the transmitter code to indicate that a package should be sent.

The other interrupt routine is connected to the GP1 line of the click itself and will trigger when new data is ready to be received. It will check the received package, and turn on the data ready indicator if everything is fine.

In the main routine, after some initialization code, two sections can be found - one for the receiver and the other one for the transmitter.

The receiver will check the package ready indicator and handle the received package. In this example, an LED will be toggled to indicate successful data transfer.

The transmitter will wait for a flag to be set from the button interrupt routine. When the flag is set, a package will be sent to the receiver.

01 #if RECEIVER
02     // Initialize BasicRF
03     config.myAddr = LIGHT_ADDR;
04     if (C6LP_init(&config) == FAILED)
05         LED1 = 1;
06         
07     C6LP_receiveOn();
08     EnableInterrupts();
09     
10     while (1)
11     {
12         while (!C6LP_isPacketReady());
13 
14         if (C6LP_receive(pRxData, APP_PAYLOAD_LENGTH, 0) > 0)
15         {
16             if (pRxData[0] == LIGHT_TOGGLE_CMD)
17             {
18                 LED0 = !LED0;
19             }
20         }
21     }
22 #else
23     pTxData[0] = LIGHT_TOGGLE_CMD;
24 
25     // Initialize BasicRF
26     config.myAddr = SWITCH_ADDR;
27     if (C6LP_init(&config) == FAILED)
28         LED1 = 1;
29     
30     // Keep Receiver off when not needed to save power
31     C6LP_receiveOff();
32 
33     flag = 0;
34     EnableInterrupts();
35     while (1)
36     {
37         if (flag)
38         {
39             flag = 0;
40             LED0 = !LED0;
41             C6LP_sendPacket(LIGHT_ADDR, pTxData, APP_PAYLOAD_LENGTH);
42             EnableInterrupts();
43         }
44     }
45 #endif