gpio.h

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/******************************************************************************
 *  Filename:       gpio.h
 *
 *  Description:    Defines and prototypes for the GPIO.
 *
 *  Copyright (c) 2022 Texas Instruments Incorporated
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1) Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *
 *  2) 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.
 *
 *  3) Neither the name of the copyright holder 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 HOLDER 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.
 *
 ******************************************************************************/

#ifndef __GPIO_H__
#define __GPIO_H__

//*****************************************************************************
//
//
//*****************************************************************************

//*****************************************************************************
//
// If building with a C++ compiler, make all of the definitions in this header
// have a C binding.
//
//*****************************************************************************
#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include "../inc/hw_types.h"
#include "../inc/hw_memmap.h"
#include "../inc/hw_gpio.h"
#include "debug.h"

//*****************************************************************************
//
// Check for legal range of variable dioNumber
//
//*****************************************************************************
#ifdef DRIVERLIB_DEBUG
    #include "chipinfo.h"

static bool dioNumberLegal(uint32_t dioNumber)
{
    // TODO: Implement properly
    // Get number of GPIOs supported by platform. Number of DIOs is NUMDIO + 1.
    // Actual number available may be less for some package types.
    uint32_t numDio = 1 + ((HWREG(GPIO_BASE + GPIO_O_DESCEX) & GPIO_DESCEX_NUMDIO_M) >> GPIO_DESCEX_NUMDIO_S);
    return (dioNumber < numDio);
}
#endif

//*****************************************************************************
//
// The following values define the bit field for the GPIO DIOs.
//
//*****************************************************************************
#define GPIO_DIO_0_MASK   0x00000001 // GPIO DIO 0 mask
#define GPIO_DIO_1_MASK   0x00000002 // GPIO DIO 1 mask
#define GPIO_DIO_2_MASK   0x00000004 // GPIO DIO 2 mask
#define GPIO_DIO_3_MASK   0x00000008 // GPIO DIO 3 mask
#define GPIO_DIO_4_MASK   0x00000010 // GPIO DIO 4 mask
#define GPIO_DIO_5_MASK   0x00000020 // GPIO DIO 5 mask
#define GPIO_DIO_6_MASK   0x00000040 // GPIO DIO 6 mask
#define GPIO_DIO_7_MASK   0x00000080 // GPIO DIO 7 mask
#define GPIO_DIO_8_MASK   0x00000100 // GPIO DIO 8 mask
#define GPIO_DIO_9_MASK   0x00000200 // GPIO DIO 9 mask
#define GPIO_DIO_10_MASK  0x00000400 // GPIO DIO 10 mask
#define GPIO_DIO_11_MASK  0x00000800 // GPIO DIO 11 mask
#define GPIO_DIO_12_MASK  0x00001000 // GPIO DIO 12 mask
#define GPIO_DIO_13_MASK  0x00002000 // GPIO DIO 13 mask
#define GPIO_DIO_14_MASK  0x00004000 // GPIO DIO 14 mask
#define GPIO_DIO_15_MASK  0x00008000 // GPIO DIO 15 mask
#define GPIO_DIO_16_MASK  0x00010000 // GPIO DIO 16 mask
#define GPIO_DIO_17_MASK  0x00020000 // GPIO DIO 17 mask
#define GPIO_DIO_18_MASK  0x00040000 // GPIO DIO 18 mask
#define GPIO_DIO_19_MASK  0x00080000 // GPIO DIO 19 mask
#define GPIO_DIO_20_MASK  0x00100000 // GPIO DIO 20 mask
#define GPIO_DIO_21_MASK  0x00200000 // GPIO DIO 21 mask
#define GPIO_DIO_22_MASK  0x00400000 // GPIO DIO 22 mask
#define GPIO_DIO_23_MASK  0x00800000 // GPIO DIO 23 mask
#define GPIO_DIO_24_MASK  0x01000000 // GPIO DIO 24 mask
#define GPIO_DIO_25_MASK  0x02000000 // GPIO DIO 25 mask
#define GPIO_DIO_ALL_MASK 0xFFFFFFFF // GPIO all DIOs mask

//*****************************************************************************
//
// Define constants that shall be passed as the outputEnableValue parameter to
// GPIOSetOutputEnableDio() and will be returned from the function
// GPIOGetOutputEnableDio().
//
//*****************************************************************************
#define GPIO_OUTPUT_DISABLE 0x00000000 // DIO output is disabled
#define GPIO_OUTPUT_ENABLE  0x00000001 // DIO output is enabled

//*****************************************************************************
//
// API Functions and prototypes
//
//*****************************************************************************

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE uint32_t GPIOReadDio(uint32_t dioNumber)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));

    // Return the input value from the specified DIO.
    return ((HWREG( GPIO_BASE + GPIO_O_DIN31_0 ) >> dioNumber) & 1);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE uint32_t GPIOReadMultiDio(uint32_t dioMask)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    // Return the input value from the specified DIOs.
    return (HWREG( GPIO_BASE + GPIO_O_DIN31_0 ) & dioMask);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOWriteDio(uint32_t dioNumber, uint32_t value)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));
    ASSERT((value == 0) || (value == 1));

    // Write 0 or 1 to the byte indexed DOUT map
    HWREGB( GPIO_BASE + GPIO_O_DOUT3_0 + dioNumber ) = value;
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOWriteMultiDio(uint32_t dioMask, uint32_t bitVectoredValue)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    HWREG( GPIO_BASE + GPIO_O_DOUT31_0 ) = (HWREG( GPIO_BASE + GPIO_O_DOUT31_0 ) & ~dioMask) |
                                            (bitVectoredValue & dioMask);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOSetDio(uint32_t dioNumber)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));

    // Set the specified DIO.
    HWREG( GPIO_BASE + GPIO_O_DOUTSET31_0 ) = (1 << dioNumber);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOSetMultiDio(uint32_t dioMask)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    // Set the DIOs.
    HWREG( GPIO_BASE + GPIO_O_DOUTSET31_0 ) = dioMask;
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOClearDio(uint32_t dioNumber)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));

    // Clear the specified DIO.
    HWREG( GPIO_BASE + GPIO_O_DOUTCLR31_0 ) = (1 << dioNumber);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOClearMultiDio(uint32_t dioMask)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    // Clear the DIOs.
    HWREG( GPIO_BASE + GPIO_O_DOUTCLR31_0 ) = dioMask;
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOToggleDio(uint32_t dioNumber)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));

    // Toggle the specified DIO.
    HWREG( GPIO_BASE + GPIO_O_DOUTTGL31_0 ) = (1 << dioNumber);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOToggleMultiDio(uint32_t dioMask)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    // Toggle the DIOs.
    HWREG( GPIO_BASE + GPIO_O_DOUTTGL31_0 ) = dioMask;
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE uint32_t GPIOGetOutputEnableDio(uint32_t dioNumber)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));

    // Return the output enable status for the specified DIO.
    return ((HWREG( GPIO_BASE + GPIO_O_DOE31_0 ) >> dioNumber) & 1);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE uint32_t GPIOGetOutputEnableMultiDio(uint32_t dioMask)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    // Return the output enable value for the specified DIOs.
    return (HWREG( GPIO_BASE + GPIO_O_DOE31_0 ) & dioMask);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOSetOutputEnableDio(uint32_t dioNumber, uint32_t outputEnableValue)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));
    ASSERT((outputEnableValue == GPIO_OUTPUT_DISABLE) || (outputEnableValue == GPIO_OUTPUT_ENABLE));

    // Update the output enable bit for the specified DIO.
    if (outputEnableValue == GPIO_OUTPUT_ENABLE)
    {
        HWREG( GPIO_BASE + GPIO_O_DOE31_0 ) |= (1 << dioNumber);
    }
    else
    {
        HWREG( GPIO_BASE + GPIO_O_DOE31_0 ) &= ~(1 << dioNumber);
    }
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOSetOutputEnableMultiDio(uint32_t dioMask, uint32_t bitVectoredOutputEnable)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    HWREG( GPIO_BASE + GPIO_O_DOE31_0 ) = (HWREG( GPIO_BASE + GPIO_O_DOE31_0 ) & ~dioMask) |
                                           (bitVectoredOutputEnable & dioMask);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE uint32_t GPIOGetEventDio(uint32_t dioNumber)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));

    // Return the event status for the specified DIO.
    return ((HWREG( GPIO_BASE + GPIO_O_RIS ) >> dioNumber) & 1);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE uint32_t GPIOGetEventMultiDio(uint32_t dioMask)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    // Return the event status for the specified DIO.
    return (HWREG( GPIO_BASE + GPIO_O_RIS ) & dioMask);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOClearEventDio(uint32_t dioNumber)
{
    // Check the arguments.
    ASSERT(dioNumberLegal(dioNumber));

    // Clear the event status for the specified DIO.
    HWREG( GPIO_BASE + GPIO_O_ICLR ) = (1 << dioNumber);
}

//*****************************************************************************
//
//
//*****************************************************************************
__STATIC_INLINE void GPIOClearEventMultiDio(uint32_t dioMask)
{
    // Check the arguments.
    ASSERT(dioMask & GPIO_DIO_ALL_MASK);

    // Clear the event status for the specified DIOs.
    HWREG( GPIO_BASE + GPIO_O_ICLR ) = dioMask;
}

//*****************************************************************************
//
// Mark the end of the C bindings section for C++ compilers.
//
//*****************************************************************************
#ifdef __cplusplus
}
#endif

//*****************************************************************************
//
//
//*****************************************************************************

#endif // __GPIO_H__