132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/*
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Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
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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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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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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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This work is heavily based on initial firmware for Ergodox keyboard.
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Copyright (c) 2012, 2013 Ben Blazak <benblazak.dev@gmail.com>
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Released under The MIT License (see "doc/licenses/MIT.md")
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Project located at <https://github.com/benblazak/ergodox-firmware>
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Most used files are located at
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<https://github.com/benblazak/ergodox-firmware/tree/partial-rewrite/firmware/keyboard/ergodox/controller>
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include "action.h"
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#include "command.h"
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#include "print.h"
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#include "debug.h"
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#include "ergodox.h"
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#include "i2cmaster.h"
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bool i2c_initialized = 0;
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bool ergodox_left_led_1 = 0; // left top
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bool ergodox_left_led_2 = 0; // left middle
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bool ergodox_left_led_3 = 0; // left bottom
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void init_ergodox(void)
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{
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// keyboard LEDs (see "PWM on ports OC1(A|B|C)" in "teensy-2-0.md")
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TCCR1A = 0b10101001; // set and configure fast PWM
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TCCR1B = 0b00001001; // set and configure fast PWM
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// (tied to Vcc for hardware convenience)
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DDRB &= ~(1<<4); // set B(4) as input
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PORTB &= ~(1<<4); // set B(4) internal pull-up disabled
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// unused pins - C7, D4, D5, D7, E6
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// set as input with internal pull-ip enabled
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DDRC &= ~(1<<7);
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DDRD &= ~(1<<7 | 1<<5 | 1<<4);
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DDRE &= ~(1<<6);
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PORTC |= (1<<7);
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PORTD |= (1<<7 | 1<<5 | 1<<4);
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PORTE |= (1<<6);
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// blink leds
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ergodox_led_all_off();
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ergodox_led_all_set(LED_BRIGHTNESS_HI);
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ergodox_led_all_on();
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_delay_ms(333);
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ergodox_led_all_off();
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}
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uint8_t init_mcp23018(void) {
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uint8_t err = 0x20;
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// I2C subsystem
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if (i2c_initialized == 0) {
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i2c_init(); // on pins D(1,0)
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i2c_initialized++;
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_delay_ms(1000);
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}
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// set pin direction
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// - unused : input : 1
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// - input : input : 1
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// - driving : output : 0
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err = i2c_start(I2C_ADDR_WRITE); if (err) goto out;
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err = i2c_write(IODIRA); if (err) goto out;
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err = i2c_write(0b00000000); if (err) goto out;
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err = i2c_write(0b00111111); if (err) goto out;
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i2c_stop();
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// set pull-up
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// - unused : on : 1
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// - input : on : 1
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// - driving : off : 0
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err = i2c_start(I2C_ADDR_WRITE); if (err) goto out;
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err = i2c_write(GPPUA); if (err) goto out;
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err = i2c_write(0b00000000); if (err) goto out;
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err = i2c_write(0b00111111); if (err) goto out;
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out:
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i2c_stop();
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if (!err) err = ergodox_left_leds_update();
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return err;
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}
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uint8_t ergodox_left_leds_update(void) {
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uint8_t err = 0x20;
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// set logical value (doesn't matter on inputs)
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// - unused : hi-Z : 1
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// - input : hi-Z : 1
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// - driving : hi-Z : 1
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err = i2c_start(I2C_ADDR_WRITE); if (err) goto out;
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err = i2c_write(OLATA); if (err) goto out;
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err = i2c_write(0b11111111
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& ~(ergodox_left_led_3<<LEFT_LED_3_SHIFT)
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); if (err) goto out;
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err = i2c_write(0b11111111
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& ~(ergodox_left_led_2<<LEFT_LED_2_SHIFT)
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& ~(ergodox_left_led_1<<LEFT_LED_1_SHIFT)
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); if (err) goto out;
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out:
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i2c_stop();
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return err;
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}
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