Zedboard's board Support package Gpio Example

Board-level support package Examples

xgpio_example.c

This file contains a design example using the GPIO driver (xgpio) and hardware

* Device. It onlyuses A Channel 1 of a GPIO device.

*

* This example can is ran on theXilinx ML300 boardusing the Prototype Pins &

* LEDs of Theboard connected to the GPIO.

This file contains a design instance using Gpio drivers (xgpio) and hardware devices. It only uses a GPIO device of Channel 1. * * This example can be run on Xilinx ML300, board connected to Gpio LEDs.

xgpio_intr_example.c

This file contains a design example using the GPIO driver (Xgpio) in an

* Interrupt driven mode of operation. This example Doesassume, there is

* An interrupt controller in the hardware system and Thegpio device is

* Connected to the interrupt controller.

*

* This example are designed to work on theXilinxML300 board using the PowerPC

* 405 Processor present in the Virtexiipro device. Theexample uses the

* Interrupt capability of the GPIO to detect push buttonpresses and control the

* LEDs on the board. When a button is pressed it'll turnon and LED located

* Closest to it. When the button is released it'll turnoff the LED.

* This examples uses the channels of a GPIO such that it isnecessary to has

* Dual channel capabilities.

*

* The buttons and LEDs is on 2seperate channels ofthe GPIO so that interrupts

* is not caused when the LEDs is turned on and off.

*

* At the start of execution all LEDs would be turned on,then each one by itself,

* and then all on again followed by all turned off. Afterthis sequence, button

* Presses is processed by interrupts.

*

* The following snippet from the UCF file of the hardwarebuild indicates the

* The Gpiochannels is connected to the ML300 for the LEDs and buttons.

The file contains a design instance using the Gpio driver (Xgpio)

* Operation Interrupt Drive mode. This example assumes that there is an interrupt controller in the hardware system and that the GPIO device is * connected to the interrupt controller. * This example is used by the PowerPC in the Xilinx ML300 Board working * 405 processor in the presence of virtexiipro device. The example uses the * simultaneous GPIO interrupt Capability detection button to press and control the LEDs on the board. When you press a button, it opens and is located led* closest to it. When the button is released, it turns off the LED. * This embodiment uses two channels of gpio so that it must have * dual Channel function. * The button and the LEDs are in the Gpio 2 independent channels, so interrupt * improper LED is connected and disconnected caused by. * At the beginning of execution all LEDs will be opened, so each one itself, * then will all again then be all off. After the sequence, the button * presses are interrupted to process. * The following code snippet from the hardware-built UCF file indicates the * way to connect the Gpio channel to the ML300 for LEDs and buttons.

xgpio_intr_tapp_example.c

This file contains a design example using the GPIO driver (Xgpio) in an

* Interrupt driven mode of operation. This example Doesassume, there is

* An interrupt controller in the hardware system and Thegpio device is

* Connected to the interrupt controller.

*

* This file was used by the Testappgen utility to include asimplified test for

* Gpio interrupts.

* The buttons and LEDs is on 2seperate channels ofthe GPIO so that interrupts

* is notcaused when the LEDs is turned on and off.

The file contains the interrupt driven mode using the Gpio driver (Xgpio) in a design instance * operation. This example assumes that there is an interrupt controller in the hardware system and that the GPIO device is connected to the interrupt controller.

* * Testappgen used in this document, including simplified test * gpio interrupts.

* The button and the LEDs are on the Gpio 2 independent channels, so interrupt * improper LED is connected and disconnected caused by.

xgpio_low_level_example.c

This file contains a design example using the Generalpurpose I/O (GPIO) low

* Level driver and hardware device. It is only uses a channel1 of a GPIO device.

This file contains a design instance that uses a generic I/O (GPIO) low * Driver and hardware device level. It only uses a GPIO device of Channel 1.

xgpio_tapp_example.c

* This file contains a example for using GPIO hardware anddriver.

* This example assumes, there is a UART Device or Stdiodevice in the

* Hardwaresystem.

* This file contains an example of using GPIO hardware and drivers. * This example assumes a hardware system for a UART device or stdio device.

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Zedboard's board Support package Gpio Example