/*
 * 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"

#define CDCD_ECHO_BUF_SIZ CONF_USB_CDCD_ACM_DATA_BULKIN_MAXPKSZ

/** Buffers to receive and echo the communication bytes. */
static uint32_t usbd_cdc_buffer[CDCD_ECHO_BUF_SIZ / 4];

/** Ctrl endpoint buffer */
static uint8_t ctrl_buffer[64];

/**
 * \brief Callback invoked when bulk OUT data received
 */
static bool usb_device_cb_bulk_out(const uint8_t ep, const enum usb_xfer_code rc, const uint32_t count)
{
	cdcdf_acm_write((uint8_t *)usbd_cdc_buffer, count);

	/* No error. */
	return false;
}

/**
 * \brief Callback invoked when bulk IN data received
 */
static bool usb_device_cb_bulk_in(const uint8_t ep, const enum usb_xfer_code rc, const uint32_t count)
{
	/* Echo data. */
	cdcdf_acm_read((uint8_t *)usbd_cdc_buffer, sizeof(usbd_cdc_buffer));

	/* No error. */
	return false;
}

/**
 * \brief Callback invoked when Line State Change
 */
static bool usb_device_cb_state_c(usb_cdc_control_signal_t state)
{
	if (state.rs232.DTR) {
		/* Callbacks must be registered after endpoint allocation */
		cdcdf_acm_register_callback(CDCDF_ACM_CB_READ, (FUNC_PTR)usb_device_cb_bulk_out);
		cdcdf_acm_register_callback(CDCDF_ACM_CB_WRITE, (FUNC_PTR)usb_device_cb_bulk_in);
		/* Start Rx */
		cdcdf_acm_read((uint8_t *)usbd_cdc_buffer, sizeof(usbd_cdc_buffer));
	}

	/* No error. */
	return false;
}

extern const struct usbd_descriptors usb_descs[];

/**
 * \brief CDC ACM Init
 */
void cdc_device_acm_init(void)
{
	/* usb stack init */
	usbdc_init(ctrl_buffer);

	/* usbdc_register_funcion inside */
	cdcdf_acm_init();

	usbdc_start((struct usbd_descriptors *) usb_descs);
	usbdc_attach();
}

/**
 * \brief Start USB stack
 */
void usb_start(void)
{
	while (!cdcdf_acm_is_enabled()) {
		// wait cdc acm to be installed
	};

	cdcdf_acm_register_callback(CDCDF_ACM_CB_STATE_C, (FUNC_PTR)usb_device_cb_state_c);
}

void usb_init(void)
{

	cdc_device_acm_init();
	ccid_df_init();
}