73 lines
2.8 KiB
C
73 lines
2.8 KiB
C
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/*
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* Copyright (C) 2016, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef PLATFORM_GALILEO_DRIVERS_CY8C9540A_H_
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#define PLATFORM_GALILEO_DRIVERS_CY8C9540A_H_
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#include <stdbool.h>
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#include <stdint.h>
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/* Driver for Cypress Semiconductors CY8C9540A device used for GPIO, PWM, and
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* pinmuxing on the first generation Intel Galileo.
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*/
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/* The numeric value of each drive mode corresponds to the device register
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* address for selecting that mode. Only a subset of the available modes are
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* listed here.
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*/
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typedef enum cy8c9540a_drive_mode {
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CY8C9540A_DRIVE_PULL_UP = 0x1D,
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CY8C9540A_DRIVE_PULL_DOWN = 0x1E,
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CY8C9540A_DRIVE_STRONG = 0x21,
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CY8C9540A_DRIVE_HI_Z = 0x23
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} cy8c9540a_drive_mode_t;
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typedef enum cy8c9540a_port_dir {
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CY8C9540A_PORT_DIR_OUT = 0,
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CY8C9540A_PORT_DIR_IN = 1
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} cy8c9540a_port_dir_t;
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typedef struct cy8c9540a_bit_addr {
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uint8_t port;
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int pin;
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} cy8c9540a_bit_addr_t;
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#define CY8C9540A_BIT_ADDR_INVALID_PORT 0xFF
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void cy8c9540a_init(void);
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void cy8c9540a_set_port_dir(cy8c9540a_bit_addr_t addr,
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cy8c9540a_port_dir_t dir);
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void cy8c9540a_set_drive_mode(cy8c9540a_bit_addr_t addr,
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cy8c9540a_drive_mode_t drv_mode);
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bool cy8c9540a_read(cy8c9540a_bit_addr_t addr);
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void cy8c9540a_write(cy8c9540a_bit_addr_t addr, bool val);
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#endif /* PLATFORM_GALILEO_DRIVERS_CY8C9540A_H_ */
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