text: //*****************************************************************************
  //
  // hw_gpio.h - Defines and Macros for GPIO hardware.
  //
  // Copyright (c) 2005-2020 Texas Instruments Incorporated.  All rights reserved.
  // Software License Agreement
  // 
  //   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.
  // 
  // This is part of revision 2.2.0.295 of the Tiva Firmware Development Package.
  //
  //*****************************************************************************
  
  #ifndef __HW_GPIO_H__
  #define __HW_GPIO_H__
  
  //*****************************************************************************
  //
  // The following are defines for the GPIO register offsets.
  //
  //*****************************************************************************
  #define GPIO_O_DATA             0x00000000  // GPIO Data
  #define GPIO_O_DIR              0x00000400  // GPIO Direction
  #define GPIO_O_IS               0x00000404  // GPIO Interrupt Sense
  #define GPIO_O_IBE              0x00000408  // GPIO Interrupt Both Edges
  #define GPIO_O_IEV              0x0000040C  // GPIO Interrupt Event
  #define GPIO_O_IM               0x00000410  // GPIO Interrupt Mask
  #define GPIO_O_RIS              0x00000414  // GPIO Raw Interrupt Status
  #define GPIO_O_MIS              0x00000418  // GPIO Masked Interrupt Status
  #define GPIO_O_ICR              0x0000041C  // GPIO Interrupt Clear
  #define GPIO_O_AFSEL            0x00000420  // GPIO Alternate Function Select
  #define GPIO_O_DR2R             0x00000500  // GPIO 2-mA Drive Select
  #define GPIO_O_DR4R             0x00000504  // GPIO 4-mA Drive Select
  #define GPIO_O_DR8R             0x00000508  // GPIO 8-mA Drive Select
  #define GPIO_O_ODR              0x0000050C  // GPIO Open Drain Select
  #define GPIO_O_PUR              0x00000510  // GPIO Pull-Up Select
  #define GPIO_O_PDR              0x00000514  // GPIO Pull-Down Select
  #define GPIO_O_SLR              0x00000518  // GPIO Slew Rate Control Select
  #define GPIO_O_DEN              0x0000051C  // GPIO Digital Enable
  #define GPIO_O_LOCK             0x00000520  // GPIO Lock
  #define GPIO_O_CR               0x00000524  // GPIO Commit
  #define GPIO_O_AMSEL            0x00000528  // GPIO Analog Mode Select
  #define GPIO_O_PCTL             0x0000052C  // GPIO Port Control
  #define GPIO_O_ADCCTL           0x00000530  // GPIO ADC Control
  #define GPIO_O_DMACTL           0x00000534  // GPIO DMA Control
  #define GPIO_O_SI               0x00000538  // GPIO Select Interrupt
  #define GPIO_O_DR12R            0x0000053C  // GPIO 12-mA Drive Select
  #define GPIO_O_WAKEPEN          0x00000540  // GPIO Wake Pin Enable
  #define GPIO_O_WAKELVL          0x00000544  // GPIO Wake Level
  #define GPIO_O_WAKESTAT         0x00000548  // GPIO Wake Status
  #define GPIO_O_PP               0x00000FC0  // GPIO Peripheral Property
  #define GPIO_O_PC               0x00000FC4  // GPIO Peripheral Configuration
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_IM register.
  //
  //*****************************************************************************
  #define GPIO_IM_DMAIME          0x00000100  // GPIO uDMA Done Interrupt Mask
                                              // Enable
  #define GPIO_IM_GPIO_M          0x000000FF  // GPIO Interrupt Mask Enable
  #define GPIO_IM_GPIO_S          0
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_RIS register.
  //
  //*****************************************************************************
  #define GPIO_RIS_DMARIS         0x00000100  // GPIO uDMA Done Interrupt Raw
                                              // Status
  #define GPIO_RIS_GPIO_M         0x000000FF  // GPIO Interrupt Raw Status
  #define GPIO_RIS_GPIO_S         0
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_MIS register.
  //
  //*****************************************************************************
  #define GPIO_MIS_DMAMIS         0x00000100  // GPIO uDMA Done Masked Interrupt
                                              // Status
  #define GPIO_MIS_GPIO_M         0x000000FF  // GPIO Masked Interrupt Status
  #define GPIO_MIS_GPIO_S         0
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_ICR register.
  //
  //*****************************************************************************
  #define GPIO_ICR_DMAIC          0x00000100  // GPIO uDMA Interrupt Clear
  #define GPIO_ICR_GPIO_M         0x000000FF  // GPIO Interrupt Clear
  #define GPIO_ICR_GPIO_S         0
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_LOCK register.
  //
  //*****************************************************************************
  #define GPIO_LOCK_M             0xFFFFFFFF  // GPIO Lock
  #define GPIO_LOCK_UNLOCKED      0x00000000  // The GPIOCR register is unlocked
                                              // and may be modified
  #define GPIO_LOCK_LOCKED        0x00000001  // The GPIOCR register is locked
                                              // and may not be modified
  #define GPIO_LOCK_KEY           0x4C4F434B  // Unlocks the GPIO_CR register
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_SI register.
  //
  //*****************************************************************************
  #define GPIO_SI_SUM             0x00000001  // Summary Interrupt
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_DR12R register.
  //
  //*****************************************************************************
  #define GPIO_DR12R_DRV12_M      0x000000FF  // Output Pad 12-mA Drive Enable
  #define GPIO_DR12R_DRV12_12MA   0x00000001  // The corresponding GPIO pin has
                                              // 12-mA drive. This encoding is
                                              // only valid if the GPIOPP EDE bit
                                              // is set and the appropriate
                                              // GPIOPC EDM bit field is
                                              // programmed to 0x3
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_WAKEPEN register.
  //
  //*****************************************************************************
  #define GPIO_WAKEPEN_WAKEP4     0x00000010  // P[4] Wake Enable
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_WAKELVL register.
  //
  //*****************************************************************************
  #define GPIO_WAKELVL_WAKELVL4   0x00000010  // P[4] Wake Level
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_WAKESTAT
  // register.
  //
  //*****************************************************************************
  #define GPIO_WAKESTAT_STAT4     0x00000010  // P[4] Wake Status
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_PP register.
  //
  //*****************************************************************************
  #define GPIO_PP_EDE             0x00000001  // Extended Drive Enable
  
  //*****************************************************************************
  //
  // The following are defines for the bit fields in the GPIO_O_PC register.
  //
  //*****************************************************************************
  #define GPIO_PC_EDM7_M          0x0000C000  // Extended Drive Mode Bit 7
  #define GPIO_PC_EDM6_M          0x00003000  // Extended Drive Mode Bit 6
  #define GPIO_PC_EDM5_M          0x00000C00  // Extended Drive Mode Bit 5
  #define GPIO_PC_EDM4_M          0x00000300  // Extended Drive Mode Bit 4
  #define GPIO_PC_EDM3_M          0x000000C0  // Extended Drive Mode Bit 3
  #define GPIO_PC_EDM2_M          0x00000030  // Extended Drive Mode Bit 2
  #define GPIO_PC_EDM1_M          0x0000000C  // Extended Drive Mode Bit 1
  #define GPIO_PC_EDM0_M          0x00000003  // Extended Drive Mode Bit 0
  #define GPIO_PC_EDM0_DISABLE    0x00000000  // Drive values of 2, 4 and 8 mA
                                              // are maintained. GPIO n Drive
                                              // Select (GPIODRnR) registers
                                              // function as normal
  #define GPIO_PC_EDM0_6MA        0x00000001  // An additional 6 mA option is
                                              // provided
  #define GPIO_PC_EDM0_PLUS2MA    0x00000003  // A 2 mA driver is always enabled;
                                              // setting the corresponding
                                              // GPIODR4R register bit adds 2 mA
                                              // and setting the corresponding
                                              // GPIODR8R of GPIODR12R register
                                              // bit adds an additional 4 mA
  #define GPIO_PC_EDM7_S          14
  #define GPIO_PC_EDM6_S          12
  #define GPIO_PC_EDM5_S          10
  #define GPIO_PC_EDM4_S          8
  #define GPIO_PC_EDM3_S          6
  #define GPIO_PC_EDM2_S          4
  #define GPIO_PC_EDM1_S          2
  
  #endif // __HW_GPIO_H__
  