rt-thread/bsp/apollo2/libraries/drivers/hal/am_hal_gpio.h

//*****************************************************************************
//
//  am_hal_gpio.h
//! @file
//!
//! @brief Functions for accessing and configuring the GPIO module.
//!
//! @addtogroup gpio2 GPIO
//! @ingroup apollo2hal
//! @{
//
//*****************************************************************************

//*****************************************************************************
//
// Copyright (c) 2017, Ambiq Micro
// All rights reserved.
// 
// 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.
//
// This is part of revision 1.2.11 of the AmbiqSuite Development Package.
//
//*****************************************************************************

#ifndef AM_HAL_GPIO_H
#define AM_HAL_GPIO_H

// DEVICE ADDRESS IS 8-bits
#define AM_HAL_GPIO_DEV_ADDR_8      (0)

// DEVICE ADDRESS IS 16-bits
#define AM_HAL_GPIO_DEV_ADDR_16     (1)

// DEVICE OFFSET IS 8-bits
#define AM_HAL_GPIO_DEV_OFFSET_8    (0x00000000)

// DEVICE OFFSET IS 16-bits
#define AM_HAL_GPIO_DEV_OFFSET_16   (0x00010000)

// Maximum number of GPIOs on this device
#define AM_HAL_GPIO_MAX_PADS        (50)

//*****************************************************************************
//
//! @name GPIO Pin defines
//! @brief GPIO Pin defines for use with interrupt functions
//!
//! These macros may be used to with \e am_hal_gpio_int_x().
//!
//! @{
//
//*****************************************************************************
#define AM_HAL_GPIO_BIT(n)          (((uint64_t) 0x1) << n)
//! @}

//
// Helper macros used for unraveling the GPIO configuration value (configval).
//
// Note that the configval, which is passed into functions such as
//  am_hal_gpio_pin_config() as well as various helper macros, is a concatenated
//  value that contains values used in multiple configuration registers.
//
// The GPIO configuration value fields are arranged as follows:
// [ 7: 0] PADREG configuration.
// [11: 8] GPIOCFG
// [15:12] Unused.
// [23:16] ALTPADREG configuration.
//
// Define macros describing these configval fields.
//
#define CFGVAL_PADREG_S             0
#define CFGVAL_PADREG_M             (0xFF << CFGVAL_PADREG_S)
#define CFGVAL_GPIOCFG_S            8
#define CFGVAL_GPIOCFG_M            (0x0F << CFGVAL_GPIOCFG_S)
#define CFGVAL_ALTPAD_S             16
#define CFGVAL_ALTPAD_M             (0xFF << CFGVAL_ALTPAD_S)

//
// Extraction macros
//
#define CFGVAL_PADREG_X(x)          (((uint32_t)(x) & CFGVAL_PADREG_M)  >>  \
                                     CFGVAL_PADREG_S)
#define CFGVAL_GPIOCFG_X(x)         (((uint32_t)(x) & CFGVAL_GPIOCFG_M) >>  \
                                     CFGVAL_GPIOCFG_S)
#define CFGVAL_ALTPAD_X(x)          (((uint32_t)(x) & CFGVAL_ALTPAD_M)  >>  \
                                     CFGVAL_ALTPAD_S)

//*****************************************************************************
//
// Input options.
//
//*****************************************************************************
#define AM_HAL_GPIO_INPEN           (0x02 << CFGVAL_PADREG_S)   // Enable input transistors.
#define AM_HAL_GPIO_INCFG_RDZERO    (0x01 << CFGVAL_GPIOCFG_S)  // Disable input read registers.

//*****************************************************************************
//
// Output options (OUTCFG)
//
//*****************************************************************************
#define AM_HAL_GPIO_OUT_DISABLE     ((0x0 << 1) << CFGVAL_GPIOCFG_S)
#define AM_HAL_GPIO_OUT_PUSHPULL    ((0x1 << 1) << CFGVAL_GPIOCFG_S)
#define AM_HAL_GPIO_OUT_OPENDRAIN   ((0x2 << 1) << CFGVAL_GPIOCFG_S)
#define AM_HAL_GPIO_OUT_3STATE      ((0x3 << 1) << CFGVAL_GPIOCFG_S)

//*****************************************************************************
//
// Special options for IOM0 and IOM4 clocks.
// For 24MHz operation, a special enable must be selected. The 24MHZ select is
// selected via bit0 of OUTCFG (which is, in a way,an alias of OUT_PUSHPULL).
//
//*****************************************************************************
#define AM_HAL_GPIO_24MHZ_ENABLE    ((0x1 << 1) << CFGVAL_GPIOCFG_S)

//*****************************************************************************
//
// Pad configuration options.
// (Configuration value bits 7:0.)
//
//*****************************************************************************
#define AM_HAL_GPIO_HIGH_DRIVE      (0x04 << CFGVAL_PADREG_S)
#define AM_HAL_GPIO_LOW_DRIVE       (0x00 << CFGVAL_PADREG_S)
#define AM_HAL_GPIO_PULLUP          (0x01 << CFGVAL_PADREG_S)
#define AM_HAL_GPIO_PULL1_5K        ( (0x01 << CFGVAL_PADREG_S) |   \
                                      AM_HAL_GPIO_PULLUP )
#define AM_HAL_GPIO_PULL6K          ( (0x40 << CFGVAL_PADREG_S) |   \
                                      AM_HAL_GPIO_PULLUP )
#define AM_HAL_GPIO_PULL12K         ( (0x80 << CFGVAL_PADREG_S) |   \
                                      AM_HAL_GPIO_PULLUP )
#define AM_HAL_GPIO_PULL24K         ( (0xC0 << CFGVAL_PADREG_S) |   \
                                      AM_HAL_GPIO_PULLUP )

// POWER SWITCH is available on selected pins
#define AM_HAL_GPIO_POWER           (0x80 << CFGVAL_PADREG_S)

//*****************************************************************************
//
//! ALTPADREG configuration options.
//! (Configuration value bits 23:16.)
//!
//! All Apollo2 GPIO pins can be configured for 2mA or 4mA.
//!     AM_HAL_GPIO_DRIVE_2MA  =  2mA configuration.
//!     AM_HAL_GPIO_DRIVE_4MA  =  4mA configuration.
//!
//! Certain Apollo2 GPIO pins can be configured to drive up to 12mA.
//!     AM_HAL_GPIO_DRIVE_8MA  =  8mA configuration.
//!     AM_HAL_GPIO_DRIVE_12MA = 12mA configuration.
//!
//! Notes:
//! - Always consult the Apollo2 data sheet for the latest details.
//! - The higher drive GPIOxx pads generally include:
//!   0-2,5,7-8,10,12-13,22-23,26-29,38-39,42,44-48.
//! - GPIOxx pads that do not support the higher drive:
//!   3-4,6,9,11,14-21,24-25,30-37,40-41,43,49.
//! - User is responsible for ensuring that the selected pin actually supports
//!   the higher drive (8mA or 12mA) capabilities. See the Apollo2 data sheet.
//! - Attempting to set the higher drive (8mA or 12mA) configuration on a
//!   non-supporting pad will actually set the pad for 4mA drive strength,
//!   regardless of the lower bit setting.
//
//*****************************************************************************
#define AM_HAL_GPIO_DRIVE_2MA       ( 0 )
#define AM_HAL_GPIO_DRIVE_4MA       AM_HAL_GPIO_HIGH_DRIVE
#define AM_HAL_GPIO_DRIVE_8MA       ( 0x01 << CFGVAL_ALTPAD_S )
#define AM_HAL_GPIO_DRIVE_12MA      ( (0x01 << CFGVAL_ALTPAD_S)  |  \
                                      AM_HAL_GPIO_HIGH_DRIVE )

#define AM_HAL_GPIO_SLEWRATE        ( 0x10 << CFGVAL_ALTPAD_S )

//*****************************************************************************
//
// Interrupt polarity
// These values can be used directly in the configval.
//
//*****************************************************************************
#define AM_HAL_GPIOCFGVAL_FALLING   ((1 << 2) << CFGVAL_GPIOCFG_S)
#define AM_HAL_GPIOCFGVAL_RISING    ((0 << 2) << CFGVAL_GPIOCFG_S)

//*****************************************************************************
//
// Pad function select
// This macro represents the 3 bit function select field in the PADREG byte.
//
//*****************************************************************************
#define AM_HAL_GPIO_FUNC(x)         ((x & 0x7) << 3)

//*****************************************************************************
//
//! Interrupt polarity
//!
//! Important:
//!  These values are to be used with am_hal_gpio_int_polarity_bit_set().
//   They are not intended to be used as part of the GPIO configval.
//
//*****************************************************************************
#define AM_HAL_GPIO_FALLING         0x00000001
#define AM_HAL_GPIO_RISING          0x00000000

//*****************************************************************************
//
// A few common pin configurations.
//
//*****************************************************************************
#define AM_HAL_GPIO_DISABLE                                                   \
    (AM_HAL_GPIO_FUNC(3))

#define AM_HAL_GPIO_INPUT                                                     \
    (AM_HAL_GPIO_FUNC(3) | AM_HAL_GPIO_INPEN)

#define AM_HAL_GPIO_OUTPUT                                                    \
    (AM_HAL_GPIO_FUNC(3) | AM_HAL_GPIO_OUT_PUSHPULL)

#define AM_HAL_GPIO_OPENDRAIN                                                 \
    (AM_HAL_GPIO_FUNC(3) | AM_HAL_GPIO_OUT_OPENDRAIN | AM_HAL_GPIO_INPEN)

#define AM_HAL_GPIO_3STATE                                                    \
    (AM_HAL_GPIO_FUNC(3) | AM_HAL_GPIO_OUT_3STATE)

//*****************************************************************************
//
// PADREG helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_PADREG(n)                                                 \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_PADREGA_O + (n & 0xFC))

#define AM_HAL_GPIO_PADREG_S(n)                                               \
    (((uint32_t)(n) % 4) << 3)

#define AM_HAL_GPIO_PADREG_M(n)                                               \
    ((uint32_t) 0xFF << AM_HAL_GPIO_PADREG_S(n))

#define AM_HAL_GPIO_PADREG_FIELD(n, configval)                                \
    (((uint32_t)(configval) & CFGVAL_PADREG_M) << AM_HAL_GPIO_PADREG_S(n))

#define AM_HAL_GPIO_PADREG_W(n, configval)                                    \
    AM_REGVAL(AM_HAL_GPIO_PADREG(n)) =                                        \
        (AM_HAL_GPIO_PADREG_FIELD(n, configval) |                             \
         (AM_REGVAL(AM_HAL_GPIO_PADREG(n)) & ~AM_HAL_GPIO_PADREG_M(n)))

#define AM_HAL_GPIO_PADREG_R(n)                                               \
    ((AM_REGVAL(AM_HAL_GPIO_PADREG(n)) & AM_HAL_GPIO_PADREG_M(n)) >>          \
     AM_HAL_GPIO_PADREG_S(n))


//*****************************************************************************
//
// ALTPADCFG helper macros.
// The ALTPADCFG bits are located in [23:16] of the configval.
//
//*****************************************************************************
#define AM_HAL_GPIO_ALTPADREG(n)                                              \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_ALTPADCFGA_O + (n & 0xFC))

#define AM_HAL_GPIO_ALTPADREG_S(n)                                            \
    (((uint32_t)(n) % 4) << 3)

#define AM_HAL_GPIO_ALTPADREG_M(n)                                            \
    ((uint32_t) 0xFF << AM_HAL_GPIO_ALTPADREG_S(n))

#define AM_HAL_GPIO_ALTPADREG_FIELD(n, configval)                             \
        (CFGVAL_ALTPAD_X(configval) << AM_HAL_GPIO_ALTPADREG_S(n))

#define AM_HAL_GPIO_ALTPADREG_W(n, configval)                                 \
    AM_REGVAL(AM_HAL_GPIO_ALTPADREG(n)) =                                     \
        (AM_HAL_GPIO_ALTPADREG_FIELD(n, configval) |                          \
         (AM_REGVAL(AM_HAL_GPIO_ALTPADREG(n)) & ~AM_HAL_GPIO_ALTPADREG_M(n)))

#define AM_HAL_GPIO_ALTPADREG_R(n)                                            \
    ((AM_REGVAL(AM_HAL_GPIO_ALTPADREG(n)) & AM_HAL_GPIO_ALTPADREG_M(n)) >>    \
     AM_HAL_GPIO_ALTPADREG_S(n))

//*****************************************************************************
//
// CFG helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_CFG(n)                                                    \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_CFGA_O + ((n & 0xF8) >> 1))

#define AM_HAL_GPIO_CFG_S(n)                                                  \
    (((uint32_t)(n) % 8) << 2)

#define AM_HAL_GPIO_CFG_M(n)                                                  \
    ((uint32_t) 0x7 << AM_HAL_GPIO_CFG_S(n))

#define AM_HAL_GPIO_CFG_FIELD(n, configval)                                   \
    ((((uint32_t)(configval) & 0x700) >> 8) << AM_HAL_GPIO_CFG_S(n))

#define AM_HAL_GPIO_CFG_W(n, configval)                                       \
    AM_REGVAL(AM_HAL_GPIO_CFG(n)) =                                           \
        (AM_HAL_GPIO_CFG_FIELD(n, configval) |                                \
         (AM_REGVAL(AM_HAL_GPIO_CFG(n)) & ~AM_HAL_GPIO_CFG_M(n)))

#define AM_HAL_GPIO_CFG_R(n)                                                  \
    ((AM_REGVAL(AM_HAL_GPIO_CFG(n)) & AM_HAL_GPIO_CFG_M(n)) >>                \
     AM_HAL_GPIO_CFG_S(n))

//*****************************************************************************
//
// Polarity helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_POL_S(n)                                                  \
    ((((uint32_t)(n) % 8) << 2) + 3)

#define AM_HAL_GPIO_POL_M(n)                                                  \
    ((uint32_t) 0x1 << AM_HAL_GPIO_POL_S(n))

#define AM_HAL_GPIO_POL_FIELD(n, polarity)                                    \
    (((uint32_t)(polarity) & 0x1) << AM_HAL_GPIO_POL_S(n))

#define AM_HAL_GPIO_POL_W(n, polarity)                                        \
    AM_REGVAL(AM_HAL_GPIO_CFG(n)) =                                           \
        (AM_HAL_GPIO_POL_FIELD(n, polarity) |                                 \
         (AM_REGVAL(AM_HAL_GPIO_CFG(n)) & ~AM_HAL_GPIO_POL_M(n)))

//*****************************************************************************
//
// RD helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_RD_REG(n)                                                 \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_RDA_O + (((uint32_t)(n) & 0x20) >> 3))

#define AM_HAL_GPIO_RD_S(n)                                                   \
    ((uint32_t)(n) % 32)

#define AM_HAL_GPIO_RD_M(n)                                                   \
    ((uint32_t) 0x1 << AM_HAL_GPIO_RD_S(n))

#define AM_HAL_GPIO_RD(n)                                                     \
    AM_REGVAL(AM_HAL_GPIO_RD_REG(n))

//*****************************************************************************
//
// WT helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_WT_REG(n)                                                 \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_WTA_O + (((uint32_t)(n) & 0x20) >> 3))

#define AM_HAL_GPIO_WT_S(n)                                                   \
    ((uint32_t)(n) % 32)

#define AM_HAL_GPIO_WT_M(n)                                                   \
    ((uint32_t) 0x1 << AM_HAL_GPIO_WT_S(n))

#define AM_HAL_GPIO_WT(n)                                                     \
    AM_REGVAL(AM_HAL_GPIO_WT_REG(n))

//*****************************************************************************
//
// WTS helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_WTS_REG(n)                                                \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_WTSA_O + (((uint32_t)(n) & 0x20) >> 3))

#define AM_HAL_GPIO_WTS_S(n)                                                  \
    ((uint32_t)(n) % 32)

#define AM_HAL_GPIO_WTS_M(n)                                                  \
    ((uint32_t) 0x1 << AM_HAL_GPIO_WTS_S(n))

#define AM_HAL_GPIO_WTS(n)                                                    \
    AM_REGVAL(AM_HAL_GPIO_WTS_REG(n))

//*****************************************************************************
//
// WTC helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_WTC_REG(n)                                                \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_WTCA_O + (((uint32_t)(n) & 0x20) >> 3))

#define AM_HAL_GPIO_WTC_S(n)                                                  \
    ((uint32_t)(n) % 32)

#define AM_HAL_GPIO_WTC_M(n)                                                  \
    ((uint32_t) 0x1 << AM_HAL_GPIO_WTC_S(n))

#define AM_HAL_GPIO_WTC(n)                                                    \
    AM_REGVAL(AM_HAL_GPIO_WTC_REG(n))

//*****************************************************************************
//
// EN helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_EN_REG(n)                                                 \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_ENA_O + (((uint32_t)(n) & 0x20) >> 3))

#define AM_HAL_GPIO_EN_S(n)                                                   \
    ((uint32_t)(n) % 32)

#define AM_HAL_GPIO_EN_M(n)                                                   \
    ((uint32_t) 0x1 << AM_HAL_GPIO_EN_S(n))

#define AM_HAL_GPIO_EN(n)                                                     \
    AM_REGVAL(AM_HAL_GPIO_EN_REG(n))

//*****************************************************************************
//
// ENS helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_ENS_REG(n)                                                \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_ENSA_O + (((uint32_t)(n) & 0x20) >> 3))

#define AM_HAL_GPIO_ENS_S(n)                                                  \
    ((uint32_t)(n) % 32)

#define AM_HAL_GPIO_ENS_M(n)                                                  \
    ((uint32_t) 0x1 << AM_HAL_GPIO_ENS_S(n))

#define AM_HAL_GPIO_ENS(n)                                                    \
    AM_REGVAL(AM_HAL_GPIO_ENS_REG(n))

//*****************************************************************************
//
// ENC helper macros.
//
//*****************************************************************************
#define AM_HAL_GPIO_ENC_REG(n)                                                \
    (AM_REG_GPIOn(0) + AM_REG_GPIO_ENCA_O + (((uint32_t)(n) & 0x20) >> 3))

#define AM_HAL_GPIO_ENC_S(n)                                                  \
    ((uint32_t)(n) % 32)

#define AM_HAL_GPIO_ENC_M(n)                                                  \
    ((uint32_t) 0x1 << AM_HAL_GPIO_ENC_S(n))

#define AM_HAL_GPIO_ENC(n)                                                    \
    AM_REGVAL(AM_HAL_GPIO_ENC_REG(n))

//*****************************************************************************
//
//! @brief Configure the GPIO PAD MUX & GPIO PIN Configurations
//!
//! @param ui32PinNumber - GPIO pin number.
//! @param ui32Config - Configuration options.
//!
//! This function applies the settings for a single GPIO. For a list of valid
//! options please see the top of this file (am_hal_gpio.h) and am_hal_pin.h.
//!
//! Usage examples:
//! am_hal_gpio_pin_config(11, AM_HAL_GPIO_INPUT);
//! am_hal_gpio_pin_config(10, AM_HAL_GPIO_OUTPUT);
//! am_hal_gpio_pin_config(14, AM_HAL_GPIO_OUTPUT | AM_HAL_GPIO_SLEWRATE);
//! am_hal_gpio_pin_config(15, AM_HAL_GPIO_OUTPUT | AM_HAL_GPIO_HIGHDRIVESTR);
//
//*****************************************************************************
#define am_hal_gpio_pin_config(ui32PinNumber, ui32Config)                     \
    if ( (uint32_t)(ui32PinNumber) < AM_HAL_GPIO_MAX_PADS )                   \
    {                                                                         \
        AM_CRITICAL_BEGIN_ASM                                                 \
                                                                              \
        AM_REGn(GPIO, 0, PADKEY) = AM_REG_GPIO_PADKEY_KEYVAL;                 \
                                                                              \
        AM_HAL_GPIO_CFG_W(ui32PinNumber, ui32Config);                         \
        AM_HAL_GPIO_PADREG_W(ui32PinNumber, ui32Config);                      \
        AM_HAL_GPIO_ALTPADREG_W(ui32PinNumber, ui32Config);                   \
                                                                              \
        AM_REGn(GPIO, 0, PADKEY) = 0;                                         \
                                                                              \
        AM_CRITICAL_END_ASM                                                   \
    }

//*****************************************************************************
//
//! @brief Set the state of one GPIO polarity bit.
//!
//! @param ui32BitNum - GPIO number.
//! @param ui32Polarity - Desired state.
//!
//! This function sets the state of one GPIO polarity bit to a supplied value.
//! The ui32Polarity parameter should be one of the following values:
//!
//!     AM_HAL_GPIO_FALLING
//!     AM_HAL_GPIO_RISING
//!
//! @return None.
//
//*****************************************************************************
#define am_hal_gpio_int_polarity_bit_set(ui32BitNum, ui32Polarity)            \
    if ( (uint32_t)(ui32BitNum) < AM_HAL_GPIO_MAX_PADS )                      \
    {                                                                         \
        AM_CRITICAL_BEGIN_ASM                                                 \
                                                                              \
        AM_REGn(GPIO, 0, PADKEY) = AM_REG_GPIO_PADKEY_KEYVAL;                 \
        AM_HAL_GPIO_POL_W(ui32BitNum, ui32Polarity);                          \
        AM_REGn(GPIO, 0, PADKEY) = 0;                                         \
                                                                              \
        AM_CRITICAL_END_ASM                                                   \
    }

//*****************************************************************************
//
//! @brief Get the state of one GPIO from the INPUT READ REGISTER.
//!
//! @param ui32BitNum - GPIO number.
//!
//! This function retrieves the state of one GPIO from the INPUT READ
//! REGISTER.
//!
//! @return the state for the requested GPIO.
//
//*****************************************************************************
#define am_hal_gpio_input_bit_read(ui32BitNum)                                \
    ((AM_HAL_GPIO_RD(ui32BitNum) & AM_HAL_GPIO_RD_M(ui32BitNum)) != 0)

//*****************************************************************************
//
//! @brief Get the state of one GPIO in the DATA OUTPUT REGISTER
//!
//! @param ui32BitNum - GPIO number.
//!
//! This function retrieves the state of one GPIO in the DATA OUTPUT REGISTER.
//!
//! @return the state for the requested GPIO or -1 for error.
//
//*****************************************************************************
#define am_hal_gpio_out_bit_read(ui32BitNum)                                  \
    ((AM_HAL_GPIO_WT(ui32BitNum) & AM_HAL_GPIO_WT_M(ui32BitNum)) != 0)

//*****************************************************************************
//
//! @brief Set the output state high for one GPIO.
//!
//! @param ui32BitNum - GPIO number.
//!
//! This function sets the output state to high for one GPIO.
//!
//! @return None.
//
//*****************************************************************************
#define am_hal_gpio_out_bit_set(ui32BitNum)                                   \
    AM_HAL_GPIO_WTS(ui32BitNum) = AM_HAL_GPIO_WTS_M(ui32BitNum)

//*****************************************************************************
//
//! @brief Sets the output state to low for one GPIO.
//!
//! @param ui32BitNum - GPIO number.
//!
//! This function sets the output state to low for one GPIO.
//!
//! @return None.
//
//*****************************************************************************
#define am_hal_gpio_out_bit_clear(ui32BitNum)                                 \
    AM_HAL_GPIO_WTC(ui32BitNum) = AM_HAL_GPIO_WTC_M(ui32BitNum)

//*****************************************************************************
//
//! @brief Sets the output state to ui32Value for one GPIO.
//!
//! @param ui32BitNum - GPIO number.
//! @param ui32Value - Desired output state.
//!
//! This function sets the output state to ui32Value for one GPIO.
//!
//! @return None.
//
//*****************************************************************************
#define am_hal_gpio_out_bit_replace(ui32BitNum, ui32Value)                    \
    if ( ui32Value )                                                          \
    {                                                                         \
        AM_HAL_GPIO_WTS(ui32BitNum) = AM_HAL_GPIO_WTS_M(ui32BitNum);          \
    }                                                                         \
    else                                                                      \
    {                                                                         \
        AM_HAL_GPIO_WTC(ui32BitNum) = AM_HAL_GPIO_WTC_M(ui32BitNum);          \
    }

//*****************************************************************************
//
//! @brief Toggle the output state of one GPIO.
//!
//! @param ui32BitNum - GPIO number.
//!
//! This function toggles the output state of one GPIO.
//!
//! @return None.
//
//*****************************************************************************
#define am_hal_gpio_out_bit_toggle(ui32BitNum)                                \
    if ( 1 )                                                                  \
    {                                                                         \
        AM_CRITICAL_BEGIN_ASM                                                 \
        AM_HAL_GPIO_WT(ui32BitNum) ^= AM_HAL_GPIO_WT_M(ui32BitNum);           \
        AM_CRITICAL_END_ASM                                                   \
    }

//*****************************************************************************
//
//! @brief Sets the output enable for one GPIO.
//!
//! @param ui32BitNum - GPIO number.
//!
//! This function sets the output enable for one GPIO.
//!
//! @return None.
//
//*****************************************************************************
#define am_hal_gpio_out_enable_bit_set(ui32BitNum)                            \
    AM_HAL_GPIO_ENS(ui32BitNum) = AM_HAL_GPIO_ENS_M(ui32BitNum)

//*****************************************************************************
//
//! @brief Clears the output enable for one GPIO.
//!
//! @param ui32BitNum - GPIO number.
//!
//! This function clears the output enable for one GPIO.
//!
//! @return None.
//
//*****************************************************************************
#define am_hal_gpio_out_enable_bit_clear(ui32BitNum)                          \
    AM_HAL_GPIO_ENC(ui32BitNum) = AM_HAL_GPIO_ENC_M(ui32BitNum)

//*****************************************************************************
//
// Function pointer type for GPIO interrupt handlers.
//
//*****************************************************************************
typedef void (*am_hal_gpio_handler_t)(void);

//*****************************************************************************
//
// External function prototypes
//
//*****************************************************************************
#ifdef __cplusplus
extern "C"
{
#endif

extern uint32_t am_hal_gpio_pin_config_read(uint32_t ui32PinNumber);
extern uint64_t am_hal_gpio_input_read(void);
extern uint64_t am_hal_gpio_out_read(void);
extern uint32_t am_hal_gpio_out_enable_bit_get(uint32_t ui32BitNum);
extern uint64_t am_hal_gpio_out_enable_get(void);
extern void am_hal_gpio_int_enable(uint64_t ui64InterruptMask);
extern uint64_t am_hal_gpio_int_enable_get(void);
extern void am_hal_gpio_int_disable(uint64_t ui64InterruptMask);
extern void am_hal_gpio_int_clear(uint64_t ui64InterruptMask);
extern void am_hal_gpio_int_set(uint64_t ui64InterruptMask);
extern uint64_t am_hal_gpio_int_status_get(bool bEnabledOnly);
extern void am_hal_gpio_int_service(uint64_t ui64Status);
extern void am_hal_gpio_int_register(uint32_t ui32GPIONumber,
                                     am_hal_gpio_handler_t pfnHandler);

extern bool am_hal_gpio_int_polarity_bit_get(uint32_t ui32BitNum);

#ifdef __cplusplus
}
#endif

#endif  // AM_HAL_GPIO_H

//*****************************************************************************
//
// End Doxygen group.
//! @}
//
//*****************************************************************************