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- /* Copyright 2018 Mike Roberts
- *
- * 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/>.
- */
- #ifndef MAP23017_H
- #define MAP23017_H
-
- #define EXPANDER_ADDR 0x27
- #define I2C_TIMEOUT 200 // milliseconds
- #define EXPANDER_PAUSE 0 // microseconds
-
- enum EXPANDER_REGISTERS {
- EXPANDER_REG_IODIRA = 0x00,
- EXPANDER_REG_IODIRB = 0x01,
- EXPANDER_REG_IPOLA = 0x02,
- EXPANDER_REG_IPOLB = 0x03,
- EXPANDER_REG_GPINTENA = 0x04,
- EXPANDER_REG_GPINTENB = 0x05,
- EXPANDER_REG_DEFVALA = 0x06,
- EXPANDER_REG_DEFVALB = 0x07,
- EXPANDER_REG_INTCONA = 0x08,
- EXPANDER_REG_INTCONB = 0x09,
- EXPANDER_REG_IOCONA = 0x0A,
- EXPANDER_REG_IOCONB = 0x0B,
- EXPANDER_REG_GPPUA = 0x0C,
- EXPANDER_REG_GPPUB = 0x0D,
- EXPANDER_REG_INTFA = 0x0E,
- EXPANDER_REG_INTFB = 0x0F,
- EXPANDER_REG_INTCAPA = 0x10,
- EXPANDER_REG_INTCAPB = 0x11,
- EXPANDER_REG_GPIOA = 0x12,
- EXPANDER_REG_GPIOB = 0x13,
- EXPANDER_REG_OLATA = 0x14,
- EXPANDER_REG_OLATB = 0x15
- };
-
- #define GPA0 0x0
- #define GPA1 0x1
- #define GPA2 0x2
- #define GPA3 0x3
- #define GPA4 0x4
- #define GPA5 0x5
- #define GPA6 0x6
- #define GPA7 0x7
- #define GPB0 0x8
- #define GPB1 0x9
- #define GPB2 0xA
- #define GPB3 0xB
- #define GPB4 0xC
- #define GPB5 0xD
- #define GPB6 0xE
- #define GPB7 0xF
-
-
- void expander_init(void);
- void expander_select(uint8_t pin);
- void expander_unselect(uint8_t pin);
- void expander_unselect_all(void);
-
- #endif
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