From 6cff82a4bc7ed9fcc7e9ad73a4542d5b1e7c1328 Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Wed, 7 Nov 2012 23:31:05 +0200 Subject: Revert "Move RGB and button drivers 2 dirs up" This reverts commit 3a282de9331ea261eeadca0dd36c0527f173dd4c. --- drivers/buttons.c | 193 ------------------------------------------------------ 1 file changed, 193 deletions(-) delete mode 100644 drivers/buttons.c (limited to 'drivers/buttons.c') diff --git a/drivers/buttons.c b/drivers/buttons.c deleted file mode 100644 index 4415168..0000000 --- a/drivers/buttons.c +++ /dev/null @@ -1,193 +0,0 @@ -//***************************************************************************** -// -// buttons.c - Evaluation board driver for push buttons. -// -// Copyright (c) 2012 Texas Instruments Incorporated. All rights reserved. -// Software License Agreement -// -// Texas Instruments (TI) is supplying this software for use solely and -// exclusively on TI's microcontroller products. The software is owned by -// TI and/or its suppliers, and is protected under applicable copyright -// laws. You may not combine this software with "viral" open-source -// software in order to form a larger program. -// -// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS. -// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT -// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY -// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL -// DAMAGES, FOR ANY REASON WHATSOEVER. -// -// This is part of revision 9453 of the EK-LM4F120XL Firmware Package. -// -//***************************************************************************** - -#include "inc/hw_types.h" -#include "inc/hw_memmap.h" -#include "inc/hw_gpio.h" -#include "driverlib/sysctl.h" -#include "driverlib/rom.h" -#include "driverlib/pin_map.h" -#include "driverlib/gpio.h" -#include "drivers/buttons.h" - -//***************************************************************************** -// -//! \addtogroup buttons_api -//! @{ -// -//***************************************************************************** - -//***************************************************************************** -// -// Holds the current, debounced state of each button. A 0 in a bit indicates -// that that button is currently pressed, otherwise it is released. -// We assume that we start with all the buttons released (though if one is -// pressed when the application starts, this will be detected). -// -//***************************************************************************** -static unsigned char g_ucButtonStates = ALL_BUTTONS; - -//***************************************************************************** -// -//! Polls the current state of the buttons and determines which have changed. -//! -//! \param pucDelta points to a character that will be written to indicate -//! which button states changed since the last time this function was called. -//! This value is derived from the debounced state of the buttons. -//! \param pucRawState points to a location where the raw button state will -//! be stored. -//! -//! This function should be called periodically by the application to poll the -//! pushbuttons. It determines both the current debounced state of the buttons -//! and also which buttons have changed state since the last time the function -//! was called. -//! -//! In order for button debouncing to work properly, this function should be -//! caled at a regular interval, even if the state of the buttons is not needed -//! that often. -//! -//! If button debouncing is not required, the the caller can pass a pointer -//! for the \e pucRawState parameter in order to get the raw state of the -//! buttons. The value returned in \e pucRawState will be a bit mask where -//! a 1 indicates the buttons is pressed. -//! -//! \return Returns the current debounced state of the buttons where a 1 in the -//! button ID's position indicates that the button is pressed and a 0 -//! indicates that it is released. -// -//***************************************************************************** -unsigned char -ButtonsPoll(unsigned char *pucDelta, unsigned char *pucRawState) -{ - unsigned long ulDelta; - unsigned long ulData; - static unsigned char ucSwitchClockA = 0; - static unsigned char ucSwitchClockB = 0; - - // - // Read the raw state of the push buttons. Save the raw state - // (inverting the bit sense) if the caller supplied storage for the - // raw value. - // - ulData = (ROM_GPIOPinRead(BUTTONS_GPIO_BASE, ALL_BUTTONS)); - if(pucRawState) - { - *pucRawState = (unsigned char)~ulData; - } - - // - // Determine the switches that are at a different state than the debounced - // state. - // - ulDelta = ulData ^ g_ucButtonStates; - - // - // Increment the clocks by one. - // - ucSwitchClockA ^= ucSwitchClockB; - ucSwitchClockB = ~ucSwitchClockB; - - // - // Reset the clocks corresponding to switches that have not changed state. - // - ucSwitchClockA &= ulDelta; - ucSwitchClockB &= ulDelta; - - // - // Get the new debounced switch state. - // - g_ucButtonStates &= ucSwitchClockA | ucSwitchClockB; - g_ucButtonStates |= (~(ucSwitchClockA | ucSwitchClockB)) & ulData; - - // - // Determine the switches that just changed debounced state. - // - ulDelta ^= (ucSwitchClockA | ucSwitchClockB); - - // - // Store the bit mask for the buttons that have changed for return to - // caller. - // - if(pucDelta) - { - *pucDelta = (unsigned char)ulDelta; - } - - // - // Return the debounced buttons states to the caller. Invert the bit - // sense so that a '1' indicates the button is pressed, which is a - // sensible way to interpret the return value. - // - return(~g_ucButtonStates); -} - -//***************************************************************************** -// -//! Initializes the GPIO pins used by the board pushbuttons. -//! -//! This function must be called during application initialization to -//! configure the GPIO pins to which the pushbuttons are attached. It enables -//! the port used by the buttons and configures each button GPIO as an input -//! with a weak pull-up. -//! -//! \return None. -// -//***************************************************************************** -void -ButtonsInit(void) -{ - // - // Enable the GPIO port to which the pushbuttons are connected. - // - ROM_SysCtlPeripheralEnable(BUTTONS_GPIO_PERIPH); - - // - // Unlock PF0 so we can change it to a GPIO input - // Once we have enabled (unlocked) the commit register then re-lock it - // to prevent further changes. PF0 is muxed with NMI thus a special case. - // - HWREG(BUTTONS_GPIO_BASE + GPIO_O_LOCK) = GPIO_LOCK_KEY_DD; - HWREG(BUTTONS_GPIO_BASE + GPIO_O_CR) |= 0x01; - HWREG(BUTTONS_GPIO_BASE + GPIO_O_LOCK) = 0; - - // - // Set each of the button GPIO pins as an input with a pull-up. - // - ROM_GPIODirModeSet(BUTTONS_GPIO_BASE, ALL_BUTTONS, GPIO_DIR_MODE_IN); - ROM_GPIOPadConfigSet(BUTTONS_GPIO_BASE, ALL_BUTTONS, - GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU); - - // - // Initialize the debounced button state with the current state read from - // the GPIO bank. - // - g_ucButtonStates = ROM_GPIOPinRead(BUTTONS_GPIO_BASE, ALL_BUTTONS); -} - -//***************************************************************************** -// -// Close the Doxygen group. -//! @} -// -//***************************************************************************** -- cgit v1.3.1