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- /*
- * Copyright 2020 Richard Titmuss (richard.titmuss@gmail.com)
- * Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
- *
- * 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/>.
- */
-
- #include QMK_KEYBOARD_H
- #include "i2c_master.h"
- #include "mcp23018.h"
-
- #define MCP23018_ADDR 0b0100000
-
- #define MCP23018_TIMEOUT 100
-
- static i2c_status_t mcp23018_status = I2C_STATUS_ERROR;
-
- void msp23018_init(void) {
- mcp23018_status = I2C_STATUS_SUCCESS;
-
- // Set pin direction
- uint8_t iodir[] = {0b00001111, 0b11111111};
- mcp23018_writeReg(IODIRA, iodir, 2);
-
- // Set pull-up
- uint8_t gppu[] = {0b00001111, 0b11111000};
- mcp23018_writeReg(GPPUA, gppu, 2);
-
- // LEDs output high
- uint8_t gpio[] = {0b00000000, 0b00000111};
- mcp23018_writeReg(GPIOA, gpio, 2);
- }
-
- bool mcp23018_reset_required(void) { return mcp23018_status != I2C_STATUS_SUCCESS; }
-
- i2c_status_t mcp23018_writeReg(uint8_t regaddr, const uint8_t* data, uint16_t length) {
- if (mcp23018_status) {
- return mcp23018_status;
- }
-
- mcp23018_status = i2c_writeReg((MCP23018_ADDR << 1), regaddr, data, length, MCP23018_TIMEOUT);
- return mcp23018_status;
- }
-
- i2c_status_t mcp23018_readReg(uint8_t regaddr, uint8_t* data, uint16_t length) {
- if (mcp23018_status) {
- return mcp23018_status;
- }
-
- mcp23018_status = i2c_readReg((MCP23018_ADDR << 1), regaddr, data, length, MCP23018_TIMEOUT);
- return mcp23018_status;
- }
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