1 files changed, 54 insertions, 0 deletions
diff --git a/atmel-samd/asf4/samd21/usb_start.c b/atmel-samd/asf4/samd21/usb_start.c
new file mode 100644
index 000000000..afd8f89b2
--- /dev/null
+++ b/atmel-samd/asf4/samd21/usb_start.c
@@ -0,0 +1,54 @@
+/*
+ * Code generated from Atmel Start.
+ *
+ * This file will be overwritten when reconfiguring your Atmel Start project.
+ * Please copy examples or other code you want to keep to a separate file or main.c
+ * to avoid loosing it when reconfiguring.
+ */
+#include "atmel_start.h"
+#include "usb_start.h"
+
+static uint8_t multi_desc_bytes[] = {
+    /* Device descriptors and Configuration descriptors list. */
+    COMPOSITE_DESCES_LS_FS,
+};
+
+static struct usbd_descriptors multi_desc = {multi_desc_bytes, multi_desc_bytes + sizeof(multi_desc_bytes)};
+
+/** Ctrl endpoint buffer */
+static uint8_t ctrl_buffer[64];
+
+/**
+ * \brief Composite Init
+ */
+void composite_device_init(void)
+{
+	/* usb stack init */
+	usbdc_init(ctrl_buffer);
+
+	/* usbdc_register_funcion inside */
+	cdcdf_acm_init();
+
+	usbdc_start(&multi_desc);
+	usbdc_attach();
+}
+
+/**
+ * Example of using Composite Function.
+ * \note
+ * In this example, we will use a PC as a USB host:
+ * - Connect the DEBUG USB on XPLAINED board to PC for program download.
+ * - Connect the TARGET USB on XPLAINED board to PC for running program.
+ */
+void composite_device_example(void)
+{
+	while (!cdcdf_acm_is_enabled()) {
+		// wait cdc acm to be installed
+	};
+}
+
+void usb_init(void)
+{
+
+	composite_device_init();
+}