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71 lines
1.9 KiB
71 lines
1.9 KiB
/* Copyright 2018 Mike Roberts
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MAP23017_H
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#define MAP23017_H
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#define EXPANDER_ADDR 0x27
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#define I2C_TIMEOUT 200 // milliseconds
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#define EXPANDER_PAUSE 0 // microseconds
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enum EXPANDER_REGISTERS {
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EXPANDER_REG_IODIRA = 0x00,
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EXPANDER_REG_IODIRB = 0x01,
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EXPANDER_REG_IPOLA = 0x02,
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EXPANDER_REG_IPOLB = 0x03,
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EXPANDER_REG_GPINTENA = 0x04,
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EXPANDER_REG_GPINTENB = 0x05,
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EXPANDER_REG_DEFVALA = 0x06,
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EXPANDER_REG_DEFVALB = 0x07,
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EXPANDER_REG_INTCONA = 0x08,
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EXPANDER_REG_INTCONB = 0x09,
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EXPANDER_REG_IOCONA = 0x0A,
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EXPANDER_REG_IOCONB = 0x0B,
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EXPANDER_REG_GPPUA = 0x0C,
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EXPANDER_REG_GPPUB = 0x0D,
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EXPANDER_REG_INTFA = 0x0E,
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EXPANDER_REG_INTFB = 0x0F,
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EXPANDER_REG_INTCAPA = 0x10,
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EXPANDER_REG_INTCAPB = 0x11,
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EXPANDER_REG_GPIOA = 0x12,
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EXPANDER_REG_GPIOB = 0x13,
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EXPANDER_REG_OLATA = 0x14,
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EXPANDER_REG_OLATB = 0x15
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};
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#define GPA0 0x0
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#define GPA1 0x1
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#define GPA2 0x2
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#define GPA3 0x3
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#define GPA4 0x4
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#define GPA5 0x5
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#define GPA6 0x6
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#define GPA7 0x7
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#define GPB0 0x8
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#define GPB1 0x9
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#define GPB2 0xA
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#define GPB3 0xB
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#define GPB4 0xC
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#define GPB5 0xD
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#define GPB6 0xE
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#define GPB7 0xF
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void expander_init(void);
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void expander_select(uint8_t pin);
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void expander_unselect(uint8_t pin);
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void expander_unselect_all(void);
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#endif
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