Introduction

This is the documentation for the data structures, functions, variables, defines, enums, and typedefs for the GPIO driver.

The General Purpose Input/Output manages the I/O pins of the microcontroller. Each I/O line may be dedicated as a general-purpose I/O or be assigned to a function of an embedded peripheral. This assures effective optimization of the pins of a product.

The given example covers various uses of the GPIO controller and demonstrates different GPIO functionalities using the peripheral bus interface. It uses a LED and a button.

This interface operates with lower clock frequencies (fPB <= fCPU), and its timing is not deterministic since it needs to access a shared bus which may be heavily loaded.

Main Files

gpio.c: GPIO driver;
gpio.h: GPIO driver header file;
gpio_peripheral_bus_example.c: GPIO example application using the peripheral bus.

Compilation Info

This software was written for the GNU GCC for AVR32 and IAR Systems compiler for AVR32. Other compilers may or may not work.

Device Info

All AVR32 devices with a GPIO module can be used. This example has been tested with the following setup:

EVK1100, EVK1101, UC3C_EK, EVK1104 or EVK1105 evaluation kits
STK600+RCUC3L0 routing card connect :
- STK600.PORTA.PA4 to STK600.LEDS.LED0
- STK600.PORTA.PA5 to STK600.LEDS.LED1
- STK600.PORTD.PD2 to STK600.SWITCHES.SW0
STK600+RCUC3L4 routing card connect :
- STK600.PORTC.PC3 to STK600.LEDS.LED0
- STK600.PORTD.PD7 to STK600.LEDS.LED1
- STK600.PORTD.PD6 to STK600.SWITCHES.SW0 Press and release SW0 to turn LED1 on/off. LED0 is automatically toggled by the application
STK600+RCUC3D routing card connect :
- STK600.PORTA.PA4 to STK600.LEDS.LED0
- STK600.PORTA.PA5 to STK600.LEDS.LED1
- STK600.PORTD.PE2 to STK600.SWITCHES.SW0 Press and release SW0 to turn LED1 on/off. LED0 is automatically toggled by the application
AT32UC3L-EK: the A LED toggles forever and use the WAKE button to toggle the B LED.

Setup Information

CPU speed: Internal RC oscillator (about 115200 Hz) .

Contact Information

For further information, visit Atmel AVR32.