From d707738616c140f8d9c8eded7b64e5fc806f4b24 Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Tue, 5 Jul 2016 23:27:10 -0400
Subject: i2c working

---
 keyboards/lets_split/split_util.c | 67 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 keyboards/lets_split/split_util.c

(limited to 'keyboards/lets_split/split_util.c')

diff --git a/keyboards/lets_split/split_util.c b/keyboards/lets_split/split_util.c
new file mode 100644
index 000000000..c394596e0
--- /dev/null
+++ b/keyboards/lets_split/split_util.c
@@ -0,0 +1,67 @@
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/power.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <avr/eeprom.h>
+#include "split_util.h"
+#include "matrix.h"
+#include "i2c.h"
+#include "keyboard.h"
+#include "config.h"
+
+volatile bool isLeftHand = true;
+
+static void setup_handedness(void) {
+    isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
+}
+
+static void keyboard_master_setup(void) {
+#ifdef USE_I2C
+    i2c_master_init();
+#else
+    serial_master_init();
+#endif
+}
+
+static void keyboard_slave_setup(void) {
+#ifdef USE_I2C
+    i2c_slave_init(SLAVE_I2C_ADDRESS);
+#else
+    serial_slave_init();
+#endif
+}
+
+bool has_usb(void) {
+   USBCON |= (1 << OTGPADE); //enables VBUS pad
+   _delay_us(5);
+   return (USBSTA & (1<<VBUS));  //checks state of VBUS
+}
+
+void split_keyboard_setup(void) {
+   setup_handedness();
+
+   if (has_usb()) {
+      keyboard_master_setup();
+   } else {
+      keyboard_slave_setup();
+   }
+   sei();
+}
+
+void keyboard_slave_loop(void) {
+   matrix_init();
+
+   while (1) {
+      matrix_slave_scan();
+   }
+}
+
+// this code runs before the usb and keyboard is initialized
+void matrix_setup(void) {
+    split_keyboard_setup();
+
+    if (!has_usb()) {
+        keyboard_slave_loop();
+    }
+}
-- 
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