gpio: xgpio_tapp_example.c File Reference

| gpio Xilinx SDK Drivers API Documentation

- Overview
- Data Structures
- APIs
- File List
- Examples

Functions
xgpio_tapp_example.c File Reference

## Overview

This file contains a example for using AXI GPIO hardware and driver.

This example assumes that there is a UART Device or STDIO Device in the hardware system.

Note

None

    MODIFICATION HISTORY:

    Ver     Who  Date         Changes

    1.00a sv   04/15/05 Initial release for TestApp integration.
    3.00a sv   11/21/09 Updated to use HAL Processor APIs.
    3.01a bss  04/18/13 Removed incorrect Documentation lines.(CR #701641)
    4.1   lks  11/18/15 Updated to use canonical xparameters and
                  clean up of the comments and code for CR 900381
    4.3   ms   01/23/17 Added xil_printf statement in main function to
                        ensure that "Successfully ran" and "Failed" strings
                        are available in all examples. This is a fix for
                        CR-965028.

## Functions
int | GpioOutputExample (u16 DeviceId, u32 GpioWidth)
| This function does a minimal test on the GPIO device configured as OUTPUT and driver as a example. More...
int | GpioInputExample (u16 DeviceId, u32 *DataRead)
| This function performs a test on the GPIO driver/device with the GPIO configured as INPUT. More...
int | main (void)
| Main function to call the example. More...

## Function Documentation

int GpioInputExample | ( | u16 | DeviceId,
|  | u32 * | DataRead
| ) |  |

This function performs a test on the GPIO driver/device with the GPIO configured as INPUT.

Parameters

  DeviceId | is the XPAR_<GPIO_instance>_DEVICE_ID value from xparameters.h
  DataRead | is the pointer where the data read from GPIO Input is returned

Returns
  - XST_SUCCESS if the Test is successful
  - XST_FAILURE if the test is not successful

Note
  None.

References XGpio_DiscreteRead(), XGpio_Initialize(), and XGpio_SetDataDirection().

Referenced by main().

int GpioOutputExample | ( | u16 | DeviceId,
|  | u32 | GpioWidth
| ) |  |

This function does a minimal test on the GPIO device configured as OUTPUT and driver as a example.

Parameters

  DeviceId | is the XPAR_<GPIO_instance>_DEVICE_ID value from xparameters.h
  GpioWidth | is the width of the GPIO

Returns
  - XST_SUCCESS if successful
  - XST_FAILURE if unsuccessful

Note
  None

References XGpio_DiscreteClear(), XGpio_DiscreteWrite(), XGpio_Initialize(), and XGpio_SetDataDirection().

Referenced by main().

int main | ( | void |  | ) |

Main function to call the example.

This function is not included if the example is generated from the Peripheral Tests in SDK.

Parameters

  None |

Returns
  - XST_SUCCESS if successful
  - XST_FAILURE if unsuccessful

Note
  None

References GpioInputExample(), and GpioOutputExample().