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