Echelon Mini FX - Manual (Page 52)

Mini FX User's Guide 39
Save. This creates a new empty Neuron C source file named main.nc in your
chosen location, and it opens the file using your computer’s default text editor.
3. Proceed to the next section to write your Neuron C device application in the main.nc
file.
Step 2: Writing the Device Application
When developing the device application, you will typically concentrate on writing the
algorithms that implement your device’s functionality. To do this, you will program any
required interaction between the device application and the I/O devices on your device
hardware. In this step, you will create Neuron C I/O declarations and implement your
desired I/O functionality in the main.nc Neuron C source file that you created in the
previous section. If you are using the Mini FX/FT Evaluation Kit, you will additionally
add code that writes to the LCD on the FT 5000 EVB.
Note: The I/O device declarations used for the Mini FX/FT hardware (FT 5000 EVBs)
and the Mini FX/PL hardware (PL 3150/PL 3170 EVBs) are different. Therefore, follow
the section corresponding with the development platform or platforms you are using for
the appropriate code to use.
FT 5000 Evaluation Boards
1. Enter the following directives:
#include <string.h>
#include <io_types.h>
#include <control.h>
//required to compile Neuron C source code
#pragma num_alias_table_entries 0
//run application even if device is uncommissioned
#pragma run_unconfigured
2. Add the following code that declares the I/O hardware for the SW1 button and LED1
on the FT 5000 EVB (both LED1 and SW1 are connected directly to the I/O 2 and I/O
9 I/O pins, respectively):
IO_2 output bit ioLed1 = 1;
IO_9 input bit ioSwitch1;
3. Add the following code that adds functionality to the Switch and LED I/O:
//Create global variable to store the previous LED state
boolean switchState;
// Function for setting LED1
void SetLed(boolean led1)
{
io_out(ioLed1, !led1);
}
// Read the SW1 button when pressed and then set LED1
void DisplayStatus(boolean led, boolean sw);
when(io_changes(ioSwitch1) to 0)
{
switchState ^= TRUE;
SetLed(switchState);
DisplayStatus(switchState, switchState);
}