Hi all
I use GpioBlinky LED sample project with beaglebone , I connect GPIO1_16 with pushbutton , but When I push button , and debug the return value , It dont change value
This is my code
/**
* \file gpioLEDBlink.c
*
* \brief This application uses a GPIO pin to control the blinking of
* an LED present on the baseboard.
*/
/*
* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
*/
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "soc_AM335x.h"
#include "beaglebone.h"
#include "gpio_v2.h"
/*****************************************************************************
** INTERNAL MACRO DEFINITIONS
*****************************************************************************/
#define GPIO_INSTANCE_ADDRESS (SOC_GPIO_1_REGS)
#define GPIO_INSTANCE_PIN_NUMBER (23)
/*****************************************************************************
** INTERNAL FUNCTION PROTOTYPES
*****************************************************************************/
static void Delay(unsigned int count);
/*****************************************************************************
** INTERNAL FUNCTION DEFINITIONS
*****************************************************************************/
/*
** The main function. Application starts here.
*/
int main()
{
/* Enabling functional clocks for GPIO1 instance. */
unsigned int iState = 0 ;
GPIO1ModuleClkConfig();
/* Selecting GPIO1[23] pin for use. */
GPIO1Pin23PinMuxSetup();
GPIO1PinMuxSetup(16);
/* Enabling the GPIO module. */
GPIOModuleEnable(GPIO_INSTANCE_ADDRESS);
/* Resetting the GPIO module. */
GPIOModuleReset(GPIO_INSTANCE_ADDRESS);
/* Setting the GPIO pin as an output pin. */
GPIODirModeSet(GPIO_INSTANCE_ADDRESS,
GPIO_INSTANCE_PIN_NUMBER,
GPIO_DIR_OUTPUT);
GPIODirModeSet(GPIO_INSTANCE_ADDRESS,
16,
GPIO_DIR_INPUT);
while(1)
{
/* Driving a logic HIGH on the GPIO pin. */
iState = GPIOPinRead(GPIO_INSTANCE_ADDRESS,16);
if(iState == 1)
{
GPIOPinWrite(GPIO_INSTANCE_ADDRESS,
GPIO_INSTANCE_PIN_NUMBER,
GPIO_PIN_LOW);
}
else
{
/* Driving a logic LOW on the GPIO pin. */
GPIOPinWrite(GPIO_INSTANCE_ADDRESS,
GPIO_INSTANCE_PIN_NUMBER,
GPIO_PIN_HIGH);
}
Delay(0x3FFFF);
}
}
/*
** A function which is used to generate a delay.
*/
static void Delay(volatile unsigned int count)
{
while(count--);
}
/******************************* End of file *********************************/