// #################################################################################################
// # << NEORV32: neorv32_gpio.h - General Purpose Input/Output Port HW Driver (Header) >>          #
// # ********************************************************************************************* #
// # BSD 3-Clause License                                                                          #
// #                                                                                               #
// # Copyright (c) 2023, Stephan Nolting. 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.                                                            #
// # ********************************************************************************************* #
// # The NEORV32 Processor - https://github.com/stnolting/neorv32              (c) Stephan Nolting #
// #################################################################################################


/**********************************************************************//**
 * @file neorv32_gpio.h
 * @brief General purpose input/output port unit (GPIO) HW driver header file.
 *
 * @note These functions should only be used if the GPIO unit was synthesized (IO_GPIO_EN = true).
 **************************************************************************/

#ifndef neorv32_gpio_h
#define neorv32_gpio_h

/**********************************************************************//**
 * @name IO Device: General Purpose Input/Output Port Unit (GPIO)
 **************************************************************************/
/**@{*/
/** GPIO module prototype */
typedef volatile struct __attribute__((packed,aligned(4))) {
  const uint32_t INPUT_LO;  /**< offset 0:  parallel input port lower 32-bit, read-only */
  const uint32_t INPUT_HI;  /**< offset 4:  parallel input port upper 32-bit, read-only */
  uint32_t       OUTPUT_LO; /**< offset 8:  parallel output port lower 32-bit */
  uint32_t       OUTPUT_HI; /**< offset 12: parallel output port upper 32-bit */
} neorv32_gpio_t;

/** GPIO module hardware access (#neorv32_gpio_t) */
#define NEORV32_GPIO ((neorv32_gpio_t*) (NEORV32_GPIO_BASE))
/**@}*/


/**********************************************************************//**
 * @name Prototypes
 **************************************************************************/
/**@{*/
int      neorv32_gpio_available(void);
void     neorv32_gpio_pin_set(int pin);
void     neorv32_gpio_pin_clr(int pin);
void     neorv32_gpio_pin_toggle(int pin);
uint32_t neorv32_gpio_pin_get(int pin);

void     neorv32_gpio_port_set(uint64_t d);
uint64_t neorv32_gpio_port_get(void);
/**@}*/


#endif // neorv32_gpio_h