gpio: xgpio_low_level_example.c File Reference

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xgpio_low_level_example.c File Reference

## Overview

This file contains a design example using the General Purpose I/O (GPIO) low level driver and hardware device.

It only uses a channel 1 of a GPIO device.

     MODIFICATION HISTORY:

     Ver   Who  Date         Changes

     1.00b jhl  04/29/02 First release
     2.00a jhl  12/30/02 Addition of dual channel capability
     2.00a sv   04/18/05 Minor changes to comply to Doxygen and coding guidelines
     3.00a ktn  11/21/09 Removed the macros XGpio_mSetDataDirection,
                          XGpio_mGetDataReg and XGpio_mSetDataReg. Users
                          should use XGpio_WriteReg/XGpio_ReadReg to achieve the
                          same functionality.
     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.
    4.5    sne  06/12/19 Fixed IAR compiler warning.

## Functions
int | main ()
| The purpose of this function is to illustrate how to use the GPIO low level driver to turn on and off an LED. More...

## Function Documentation

int main | ( | void |  | ) |

The purpose of this function is to illustrate how to use the GPIO low level driver to turn on and off an LED.

Parameters

  None |

Returns
  Always 0

Note
  The main function is returning an integer to prevent compiler warnings.

References XGPIO_DATA_OFFSET, XGpio_ReadReg, XGPIO_TRI_OFFSET, and XGpio_WriteReg.