nes-proj/platform/galileo/drivers/cy8c9540a.h

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/*
* Copyright (C) 2016, Intel Corporation. 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.
*/
#ifndef PLATFORM_GALILEO_DRIVERS_CY8C9540A_H_
#define PLATFORM_GALILEO_DRIVERS_CY8C9540A_H_
#include <stdbool.h>
#include <stdint.h>
/* Driver for Cypress Semiconductors CY8C9540A device used for GPIO, PWM, and
* pinmuxing on the first generation Intel Galileo.
*/
/* The numeric value of each drive mode corresponds to the device register
* address for selecting that mode. Only a subset of the available modes are
* listed here.
*/
typedef enum cy8c9540a_drive_mode {
CY8C9540A_DRIVE_PULL_UP = 0x1D,
CY8C9540A_DRIVE_PULL_DOWN = 0x1E,
CY8C9540A_DRIVE_STRONG = 0x21,
CY8C9540A_DRIVE_HI_Z = 0x23
} cy8c9540a_drive_mode_t;
typedef enum cy8c9540a_port_dir {
CY8C9540A_PORT_DIR_OUT = 0,
CY8C9540A_PORT_DIR_IN = 1
} cy8c9540a_port_dir_t;
typedef struct cy8c9540a_bit_addr {
uint8_t port;
int pin;
} cy8c9540a_bit_addr_t;
#define CY8C9540A_BIT_ADDR_INVALID_PORT 0xFF
void cy8c9540a_init(void);
void cy8c9540a_set_port_dir(cy8c9540a_bit_addr_t addr,
cy8c9540a_port_dir_t dir);
void cy8c9540a_set_drive_mode(cy8c9540a_bit_addr_t addr,
cy8c9540a_drive_mode_t drv_mode);
bool cy8c9540a_read(cy8c9540a_bit_addr_t addr);
void cy8c9540a_write(cy8c9540a_bit_addr_t addr, bool val);
#endif /* PLATFORM_GALILEO_DRIVERS_CY8C9540A_H_ */