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/* Copyright 2019 Neil Kettle
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "quantum.h"
#ifdef RIGHT_HALF
# include <stdint.h>
# include "i2c_master.h"
// I2C aliases and register addresses (see "mcp23018.md")
# define I2C_ADDR 0b0100000
# define I2C_ADDR_WRITE ( (I2C_ADDR<<1) | I2C_WRITE )
# define I2C_ADDR_READ ( (I2C_ADDR<<1) | I2C_READ )
# define IODIRA 0x00 // i/o direction register
# define IODIRB 0x01
# define GPPUA 0x0C // GPIO pull-up resistor register
# define GPPUB 0x0D
# define GPIOA 0x12 // general purpose i/o port register (write modifies OLAT)
# define GPIOB 0x13
# define OLATA 0x14 // output latch register
# define OLATB 0x15
extern i2c_status_t mcp23018_status;
# define MCP23018_I2C_TIMEOUT 100
uint8_t init_mcp23018(void);
#endif
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