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
  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     #ifdef I2C_MASTER_RIGHT
  25       isLeftHand = !has_usb();
  26     #else
  27       isLeftHand = has_usb();
  28     #endif
  29   #endif
  30 }
  31
  32 static void keyboard_master_setup(void) {
  33 #ifdef USE_I2C
  34     i2c_master_init();
  35 #else
  36     serial_master_init();
  37 #endif
  38 }
  39
  40 static void keyboard_slave_setup(void) {
  41 #ifdef USE_I2C
  42     i2c_slave_init(SLAVE_I2C_ADDRESS);
  43 #else
  44     serial_slave_init();
  45 #endif
  46 }
  47
  48 bool has_usb(void) {
  49    USBCON |= (1 << OTGPADE); //enables VBUS pad
  50    _delay_us(5);
  51    return (USBSTA & (1<<VBUS));  //checks state of VBUS
  52 }
  53
  54 void split_keyboard_setup(void) {
  55    setup_handedness();
  56
  57    if (has_usb()) {
  58       keyboard_master_setup();
  59    } else {
  60       keyboard_slave_setup();
  61    }
  62    sei();
  63 }
  64
  65 void keyboard_slave_loop(void) {
  66    matrix_init();
  67
  68    while (1) {
  69       matrix_slave_scan();
  70    }
  71 }
  72
  73 // this code runs before the usb and keyboard is initialized
  74 void matrix_setup(void) {
  75     split_keyboard_setup();
  76
  77     if (!has_usb()) {
  78         keyboard_slave_loop();
  79     }
  80 }