keyboards/lets_split/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
  13 #ifdef USE_I2C
  14 #  include "i2c.h"
  15 #else
  16 #  include "serial.h"
  17 #endif
  18
  19 volatile bool isLeftHand = true;
  20
  21 static void setup_handedness(void) {
  22   #ifdef EE_HANDS
  23     isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
  24   #else
  25     // I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
  26     #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
  27       isLeftHand = !has_usb();
  28     #else
  29       isLeftHand = has_usb();
  30     #endif
  31   #endif
  32 }
  33
  34 static void keyboard_master_setup(void) {
  35 #ifdef USE_I2C
  36     i2c_master_init();
  37 #ifdef SSD1306OLED
  38     matrix_master_OLED_init ();
  39 #endif
  40 #else
  41     serial_master_init();
  42 #endif
  43 }
  44
  45 static void keyboard_slave_setup(void) {
  46   timer_init();
  47 #ifdef USE_I2C
  48     i2c_slave_init(SLAVE_I2C_ADDRESS);
  49 #else
  50     serial_slave_init();
  51 #endif
  52 }
  53
  54 bool has_usb(void) {
  55    USBCON |= (1 << OTGPADE); //enables VBUS pad
  56    _delay_us(5);
  57    return (USBSTA & (1<<VBUS));  //checks state of VBUS
  58 }
  59
  60 void split_keyboard_setup(void) {
  61    setup_handedness();
  62
  63    if (has_usb()) {
  64       keyboard_master_setup();
  65    } else {
  66       keyboard_slave_setup();
  67    }
  68    sei();
  69 }
  70
  71 void keyboard_slave_loop(void) {
  72    matrix_init();
  73
  74    while (1) {
  75       matrix_slave_scan();
  76    }
  77 }
  78
  79 // this code runs before the usb and keyboard is initialized
  80 void matrix_setup(void) {
  81     split_keyboard_setup();
  82
  83     if (!has_usb()) {
  84         keyboard_slave_loop();
  85     }
  86 }