Refactor for better organization

CMakeLists.txt

@@ -8,5 +8,6 @@ project(zmk)
 
 # Add your source file to the "app" target. This must come after
 # find_package(Zephyr) which defines the target.
+target_sources(app PRIVATE src/kscan.c)
 target_sources(app PRIVATE src/main.c)
 

src/kscan.c

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2020 Peter Johanson
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <zephyr.h>
+#include <device.h>
+#include <devicetree.h>
+#include <drivers/kscan.h>
+
+static void zmk_kscan_callback(struct device *dev, u32_t row, u32_t column, bool pressed) {
+	printk("Row: %d, col: %d, pressed: %s\n", row, column, (pressed ? "true" : "false"));
+	// TODO: Push this to a message box, and then trigger a work item!
+}
+
+int zmk_kscan_init(char* name) {
+	struct device *dev = device_get_binding(name);
+	if (dev == NULL) {
+		printk("NO DEVICE!\n");
+		return -EINVAL;
+	}
+
+	return 0;
+
+	kscan_config(dev, zmk_kscan_callback);
+
+	kscan_enable_callback(dev);
+}

src/kscan.h

@@ -0,0 +1,2 @@
+
+int zmk_kscan_init(char *name);

src/main.c

@@ -1,33 +1,18 @@
 /*
- * Copyright (c) 2016 Intel Corporation
+ * Copyright (c) 2020 Peter Johanson
  *
- * SPDX-License-Identifier: Apache-2.0
+ * SPDX-License-Identifier: MIT
  */
 
 #include <zephyr.h>
 #include <device.h>
 #include <devicetree.h>
-#include <drivers/gpio.h>
-#include <drivers/kscan.h>
-
-
-void zmk_kscan_callback(struct device *dev, u32_t row, u32_t column, bool pressed) {
-	printk("Row: %d, col: %d, pressed: %s\n", row, column, (pressed ? "true" : "false"));
-}
 
+#include "kscan.h"
 
 void main(void)
 {
-	struct device *dev;
 	printk("Welcome to ZMK!\n");
 
-	dev = device_get_binding(CONFIG_KSCAN_MATRIX_DEV_NAME);
-	if (dev == NULL) {
-		printk("NO DEVICE!\n");
-		return;
-	}
-
-	kscan_config(dev, zmk_kscan_callback);
-
-	kscan_enable_callback(dev);
+	zmk_kscan_init(CONFIG_KSCAN_MATRIX_DEV_NAME);
 }