56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* Copyright 2021 Jane Bernhardt
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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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#pragma once
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#include "quantum.h"
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#include "i2c_master.h"
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extern i2c_status_t mcp23018_status;
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#define I2C_TIMEOUT 1000
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#define XXX KC_NO
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// I2C aliases and register addresses (see "mcp23018.md")
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#define I2C_ADDR 0x20 // 0b0100000
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#define I2C_ADDR_WRITE ((I2C_ADDR << 1) | I2C_WRITE)
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#define I2C_ADDR_READ ((I2C_ADDR << 1) | I2C_READ)
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#define IODIRA 0x00 // i/o direction register
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#define IODIRB 0x01
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#define GPPUA 0x0C // GPIO pull-up resistor register
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#define GPIOA 0x12 // general purpose i/o port register (write modifies OLAT)
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#define OLATA 0x14 // output latch register
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uint8_t init_mcp23018(void);
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#define LAYOUT_split_3x5_3( \
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L00, L01, L02, L03, L04, R00, R01, R02, R03, R04, \
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L10, L11, L12, L13, L14, R10, R11, R12, R13, R14, \
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L20, L21, L22, L23, L24, R20, R21, R22, R23, R24, \
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L30, L31, L32, R30, R31, R32 \
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) { \
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{ L04, L14, L24, XXX }, \
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{ L03, L13, L23, L32 }, \
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{ L02, L12, L22, L31 }, \
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{ L01, L11, L21, L30 }, \
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{ L00, L10, L20, XXX }, \
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{ R00, R10, R20, XXX }, \
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{ R01, R11, R21, R30 }, \
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{ R02, R12, R22, R31 }, \
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{ R03, R13, R23, R32 }, \
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{ R04, R14, R24, XXX } \
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}
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