Version: *A
Question:
How do I add a generic LED to an FN0 pin in the PowerPSoC® device?
Answer:
Currently, the FN0_x pins do not appear in the Port selection drop-down menu of the LED User Module in PSoC Designer. The following steps can be used as a workaround to connect an LED to an FN0_x pin without placing the LED User Module.
- Copy the .asm, .inc, and .h files of the appropriate FN0 pin into the project directory that contains the main.c file.
For example, for pin FN0[0], copy LED_FN0_0.inc, LED_FN0_0.asm, and LED_FN0_0.h. - Copy the LED_FN0_General.asm file into the project directory that contains the main.c file.
- In PSoC Designer, select Project > Add File. Use the Files of Type drop-down to select All Files (*.*). Select the three LED_FN0 files copied in steps 1 and 2, and then click Open.
- Open each file that calls the LED_FN0 function. Include the C header file (.h) with the command:
#include filename
For example:
#include LED_FN0_0.h - Call the Start function, LED_FN0_0_Start(), as shown in the attached example project in the main.c file..
It sets the correct drive mode of the pins. - Call any of the other LED functions as needed.
- Option: The LED drive is set to active high (LED_On sets the output to HIGH). To change to active low, open the LED_FN0_x.inc file, and change the value of LED_FN0_x_Drive to 0 (LED_FN0_0_Drive: equ 0).
The sample project attached connects the FN0_0 pin to an LED. In this project, the state of the LED is toggled periodically.
