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[qmk_firmware.git] / quantum / split_common / split_util.c
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 #include "timer.h"
12 #include "split_flags.h"
13
14 #ifdef RGBLIGHT_ENABLE
15 #   include "rgblight.h"
16 #endif
17 #ifdef BACKLIGHT_ENABLE
18 #   include "backlight.h"
19 #endif
20
21 #ifdef SPLIT_HAND_PIN
22 #   include "pincontrol.h"
23 #endif
24
25 #if defined(USE_I2C) || defined(EH)
26 #  include "i2c.h"
27 #else
28 #  include "serial.h"
29 #endif
30
31 volatile bool isLeftHand = true;
32
33 volatile uint8_t setTries = 0;
34
35 static void setup_handedness(void) {
36   #ifdef SPLIT_HAND_PIN
37     // Test pin SPLIT_HAND_PIN for High/Low, if low it's right hand
38     pinMode(SPLIT_HAND_PIN, PinDirectionInput);
39     isLeftHand = digitalRead(SPLIT_HAND_PIN);
40   #else
41     #ifdef EE_HANDS
42       isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
43     #else
44       // I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
45       #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
46         isLeftHand = !has_usb();
47       #else
48         isLeftHand = has_usb();
49       #endif
50     #endif
51   #endif
52 }
53
54 static void keyboard_master_setup(void) {
55 #if defined(USE_I2C) || defined(EH)
56   i2c_master_init();
57   #ifdef SSD1306OLED
58     matrix_master_OLED_init ();
59   #endif
60 #else
61   serial_master_init();
62 #endif
63
64     // For master the Backlight info needs to be sent on startup
65     // Otherwise the salve won't start with the proper info until an update
66     BACKLIT_DIRTY = true;
67 }
68
69 static void keyboard_slave_setup(void) {
70   timer_init();
71 #if defined(USE_I2C) || defined(EH)
72     i2c_slave_init(SLAVE_I2C_ADDRESS);
73 #else
74     serial_slave_init();
75 #endif
76 }
77
78 bool has_usb(void) {
79    USBCON |= (1 << OTGPADE); //enables VBUS pad
80    _delay_us(5);
81    return (USBSTA & (1<<VBUS));  //checks state of VBUS
82 }
83
84 void split_keyboard_setup(void) {
85    setup_handedness();
86
87    if (has_usb()) {
88       keyboard_master_setup();
89    } else {
90       keyboard_slave_setup();
91    }
92    sei();
93 }
94
95 void disable_JTAG(void);
96 void keyboard_slave_loop(void) {
97    // Disable JTAG since we skip calling keyboard_init() on the slave side
98    // Future fix will possible call keyboard_init() on the slave to remove this need
99    disable_JTAG();
100
101    matrix_init();
102
103    //Init RGB
104    #ifdef RGBLIGHT_ENABLE
105       rgblight_init();
106    #endif
107
108    while (1) {
109     // Matrix Slave Scan
110     matrix_slave_scan();
111
112     // Read Backlight Info
113     #ifdef BACKLIGHT_ENABLE
114         #ifdef USE_I2C
115             if (BACKLIT_DIRTY) {
116                 backlight_set(i2c_slave_buffer[I2C_BACKLIT_START]);
117                 BACKLIT_DIRTY = false;
118             }
119         #else // USE_SERIAL
120             backlight_set(serial_master_buffer[SERIAL_BACKLIT_START]);
121         #endif
122     #endif
123     // Read RGB Info
124     #ifdef RGBLIGHT_ENABLE
125         #ifdef USE_I2C
126             if (RGB_DIRTY) {
127                 // Disable interupts (RGB data is big)
128                 cli();
129                 // Create new DWORD for RGB data
130                 uint32_t dword;
131
132                 // Fill the new DWORD with the data that was sent over
133                 uint8_t *dword_dat = (uint8_t *)(&dword);
134                 for (int i = 0; i < 4; i++) {
135                     dword_dat[i] = i2c_slave_buffer[I2C_RGB_START+i];
136                 }
137
138                 // Update the RGB now with the new data and set RGB_DIRTY to false
139                 rgblight_update_dword(dword);
140                 RGB_DIRTY = false;
141                 // Re-enable interupts now that RGB is set
142                 sei();
143             }
144         #else // USE_SERIAL
145             // Add serial implementation for RGB here
146         #endif
147     #endif
148    }
149 }
150
151 // this code runs before the usb and keyboard is initialized
152 void matrix_setup(void) {
153     split_keyboard_setup();
154
155     if (!has_usb()) {
156         //rgblight_init();
157         keyboard_slave_loop();
158     }
159 }
160
161 // Temporary code to disable JTAG on the slave board
162 void disable_JTAG(void) {
163     /* Copied from tmk_core/common/keybaord.c */
164     // To use PORTF disable JTAG with writing JTD bit twice within four cycles.
165     #if  (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega32U4__))
166       MCUCR |= _BV(JTD);
167       MCUCR |= _BV(JTD);
168     #endif
169 }