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1 #include <avr/io.h>
2 #include <avr/wdt.h>
3 #include <avr/power.h>
4 #include <avr/interrupt.h>
5 #include <util/delay.h>
6 #include <avr/eeprom.h>
7 #include "split_util.h"
8 #include "matrix.h"
9 #include "keyboard.h"
10 #include "config.h"
11
12 #ifdef USE_I2C
13 #  include "i2c.h"
14 #else
15 #  include "serial.h"
16 #endif
17
18 volatile bool isLeftHand = true;
19
20 static void setup_handedness(void) {
21   #ifdef EE_HANDS
22     isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
23   #else
24     // I2C_MASTER_RIGHT is deprecated use MASTER_RIGHT instead since this works for both serial and i2c
25     #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
26       isLeftHand = !has_usb();
27     #else
28       isLeftHand = has_usb();
29     #endif
30   #endif
31 }
32
33 static void keyboard_master_setup(void) {
34 #ifdef USE_I2C
35     i2c_master_init();
36 #else
37     serial_master_init();
38 #endif
39 }
40
41 static void keyboard_slave_setup(void) {
42 #ifdef USE_I2C
43     i2c_slave_init(SLAVE_I2C_ADDRESS);
44 #else
45     serial_slave_init();
46 #endif
47 }
48
49 bool has_usb(void) {
50    USBCON |= (1 << OTGPADE); //enables VBUS pad
51    _delay_us(5);
52    return (USBSTA & (1<<VBUS));  //checks state of VBUS
53 }
54
55 void split_keyboard_setup(void) {
56    setup_handedness();
57
58    if (has_usb()) {
59       keyboard_master_setup();
60    } else {
61       keyboard_slave_setup();
62    }
63    sei();
64 }
65
66 void keyboard_slave_loop(void) {
67    matrix_init();
68
69    while (1) {
70       matrix_slave_scan();
71    }
72 }
73
74 // this code runs before the usb and keyboard is initialized
75 void matrix_setup(void) {
76     split_keyboard_setup();
77
78     if (!has_usb()) {
79         keyboard_slave_loop();
80     }
81 }