Move device to a separate build target

device/BUILD

@@ -0,0 +1,6 @@
+cc_library(
+    name = "device",
+    srcs = glob(["*.c"]),
+    hdrs = glob(["*.h"]),
+    visibility = ["//visibility:public"]
+)

device/device.c

@@ -0,0 +1,5 @@
+#include <stdbool.h>
+#include "device.h"
+
+uint32_t device_pixels[DEVICE_H][DEVICE_W];
+bool device_buttons[DEVICE_BUTTON_N];

device/device.h

@@ -0,0 +1,28 @@
+#ifndef CROCPARTY_DEVICE_H
+#define CROCPARTY_DEVICE_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+// 240 x 135 is also cool
+#define DEVICE_W 128
+#define DEVICE_H 128
+
+typedef enum {
+    DEVICE_BUTTON_L=0,
+    DEVICE_BUTTON_R=1,
+    DEVICE_BUTTON_U=2,
+    DEVICE_BUTTON_D=3,
+
+    DEVICE_BUTTON_0=4,
+    DEVICE_BUTTON_1=5,
+    DEVICE_BUTTON_2=6,
+    DEVICE_BUTTON_3=7,
+
+    DEVICE_BUTTON_N=8,
+} DeviceButton;
+
+extern uint32_t device_pixels[DEVICE_H][DEVICE_W];
+extern bool device_buttons[DEVICE_BUTTON_N];
+
+#endif //CROCPARTY_DEVICE_H