keyboards/crkbd/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
  12 #ifdef USE_MATRIX_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
  35 #ifdef USE_MATRIX_I2C
  36     i2c_master_init();
  37 #else
  38     serial_master_init();
  39 #endif
  40 }
  41
  42 static void keyboard_slave_setup(void) {
  43
  44 #ifdef USE_MATRIX_I2C
  45     i2c_slave_init(SLAVE_I2C_ADDRESS);
  46 #else
  47     serial_slave_init();
  48 #endif
  49 }
  50
  51 bool has_usb(void) {
  52    USBCON |= (1 << OTGPADE); //enables VBUS pad
  53    _delay_us(5);
  54    return (USBSTA & (1<<VBUS));  //checks state of VBUS
  55 }
  56
  57 void split_keyboard_setup(void) {
  58    setup_handedness();
  59
  60    if (has_usb()) {
  61       keyboard_master_setup();
  62    } else {
  63       keyboard_slave_setup();
  64    }
  65    sei();
  66 }
  67
  68 // this code runs before the usb and keyboard is initialized
  69 void matrix_setup(void) {
  70     split_keyboard_setup();
  71 }