TX/source/USB/virtual_com.c

/*
 * Copyright (c) 2015 - 2016, Freescale Semiconductor, Inc.
 * Copyright 2016 - 2017 NXP
 * All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include "fsl_device_registers.h"
#include "fsl_debug_console.h"
#include "pin_mux.h"
#include "clock_config.h"
#include "board.h"

#include "usb_device_config.h"
#include "usb.h"
#include "usb_device.h"

#include "usb_device_class.h"
#include "usb_device_cdc_acm.h"
#include "usb_device_ch9.h"

#include "usb_device_descriptor.h"
#include "virtual_com.h"
#if (defined(FSL_FEATURE_SOC_SYSMPU_COUNT) && (FSL_FEATURE_SOC_SYSMPU_COUNT > 0U))
#include "fsl_sysmpu.h"
#endif /* FSL_FEATURE_SOC_SYSMPU_COUNT */

#if ((defined FSL_FEATURE_SOC_USBPHY_COUNT) && (FSL_FEATURE_SOC_USBPHY_COUNT > 0U))
#include "usb_phy.h"
#endif
#if defined(FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED) && (FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED > 0U) && \
    defined(USB_DEVICE_CONFIG_KEEP_ALIVE_MODE) && (USB_DEVICE_CONFIG_KEEP_ALIVE_MODE > 0U) &&             \
    defined(FSL_FEATURE_USB_KHCI_USB_RAM) && (FSL_FEATURE_USB_KHCI_USB_RAM > 0U)
extern uint8_t USB_EnterLowpowerMode(void);
#endif
#include "fsl_power.h"

//Application Includes
#include "flashUpdate.h"
#include "usbComms.h"
#include "System/system.h"

/*******************************************************************************
 * Definitions
 ******************************************************************************/

#define CR						'\r'	//carriage return
#define LF						'\n'	//line feed
#define null	0						//NULL is defined at (void *)0 so it causes errors

/*******************************************************************************
 * Prototypes
 ******************************************************************************/
void BOARD_InitHardware(void);
void USB_DeviceClockInit(void);
void USB_DeviceIsrEnable(void);
#if USB_DEVICE_CONFIG_USE_TASK
void USB_DeviceTaskFn(void *deviceHandle);
#endif

void BOARD_DbgConsole_Deinit(void);
void BOARD_DbgConsole_Init(void);
usb_status_t USB_DeviceCdcVcomCallback(class_handle_t handle, uint32_t event, void *param);
usb_status_t USB_DeviceCallback(usb_device_handle handle, uint32_t event, void *param);


#if 0	//Trying to fix project after adding, then removing FLASHIAP driver. Makes no difference
extern usb_status_t USB_DeviceCdcAcmSend(class_handle_t handle, uint8_t ep, uint8_t *buffer, uint32_t length);
extern usb_status_t USB_DeviceCdcAcmRecv(class_handle_t handle, uint8_t ep, uint8_t *buffer, uint32_t length);
#endif

/*******************************************************************************
 * Variables
 ******************************************************************************/

//Application
extern USB_t usb;


extern usb_device_endpoint_struct_t g_UsbDeviceCdcVcomDicEndpoints[];
extern usb_device_class_struct_t g_UsbDeviceCdcVcomConfig;
/* Data structure of virtual com device */
usb_cdc_vcom_struct_t s_cdcVcom;

/* Line coding of cdc device */
USB_DMA_INIT_DATA_ALIGN(USB_DATA_ALIGN_SIZE)
static uint8_t s_lineCoding[LINE_CODING_SIZE] = {
    /* E.g. 0x00,0xC2,0x01,0x00 : 0x0001C200 is 115200 bits per second */
    (LINE_CODING_DTERATE >> 0U) & 0x000000FFU,
    (LINE_CODING_DTERATE >> 8U) & 0x000000FFU,
    (LINE_CODING_DTERATE >> 16U) & 0x000000FFU,
    (LINE_CODING_DTERATE >> 24U) & 0x000000FFU,
    LINE_CODING_CHARFORMAT,
    LINE_CODING_PARITYTYPE,
    LINE_CODING_DATABITS};

/* Abstract state of cdc device */
USB_DMA_INIT_DATA_ALIGN(USB_DATA_ALIGN_SIZE)
static uint8_t s_abstractState[COMM_FEATURE_DATA_SIZE] = {(STATUS_ABSTRACT_STATE >> 0U) & 0x00FFU,
                                                          (STATUS_ABSTRACT_STATE >> 8U) & 0x00FFU};

/* Country code of cdc device */
USB_DMA_INIT_DATA_ALIGN(USB_DATA_ALIGN_SIZE)
static uint8_t s_countryCode[COMM_FEATURE_DATA_SIZE] = {(COUNTRY_SETTING >> 0U) & 0x00FFU,
                                                        (COUNTRY_SETTING >> 8U) & 0x00FFU};

/* CDC ACM information */
USB_DMA_NONINIT_DATA_ALIGN(USB_DATA_ALIGN_SIZE) static usb_cdc_acm_info_t s_usbCdcAcmInfo;
/* Data buffer for receiving and sending*/
USB_DMA_NONINIT_DATA_ALIGN(USB_DATA_ALIGN_SIZE) static uint8_t rxBuffer[USB_BUFFER_SIZE];
USB_DMA_NONINIT_DATA_ALIGN(USB_DATA_ALIGN_SIZE) static uint8_t txBuffer[USB_BUFFER_SIZE];
volatile static uint32_t rxDataSize = 0;
volatile static uint32_t txDataSize = 0;

/* USB device class information */
static usb_device_class_config_struct_t s_cdcAcmConfig[1] = {{
    USB_DeviceCdcVcomCallback,
    0,
    &g_UsbDeviceCdcVcomConfig,
}};

/* USB device class configuration information */
static usb_device_class_config_list_struct_t s_cdcAcmConfigList = {
    s_cdcAcmConfig,
    USB_DeviceCallback,
    1,
};

#if defined(FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED) && (FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED > 0U) && \
    defined(USB_DEVICE_CONFIG_KEEP_ALIVE_MODE) && (USB_DEVICE_CONFIG_KEEP_ALIVE_MODE > 0U) &&             \
    defined(FSL_FEATURE_USB_KHCI_USB_RAM) && (FSL_FEATURE_USB_KHCI_USB_RAM > 0U)
volatile static uint8_t s_waitForDataReceive = 0;
volatile static uint8_t s_comOpen            = 0;
#endif
/*******************************************************************************
 * Code
 ******************************************************************************/

void USB0_IRQHandler(void)
{
    USB_DeviceLpcIp3511IsrFunction(s_cdcVcom.deviceHandle);
}

void USB_DeviceClockInit(void)
{
    /* enable USB IP clock */
    CLOCK_EnableUsbfs0Clock(kCLOCK_UsbSrcFro, CLOCK_GetFreq(kCLOCK_FroHf));
}
void USB_DeviceIsrEnable(void)
{
    uint8_t irqNumber;

    uint8_t usbDeviceIP3511Irq[] = USB_IRQS;
    irqNumber                    = usbDeviceIP3511Irq[CONTROLLER_ID - kUSB_ControllerLpcIp3511Fs0];

    /* Install isr, set priority, and enable IRQ. */
    NVIC_SetPriority((IRQn_Type)irqNumber, USB_DEVICE_INTERRUPT_PRIORITY);
    EnableIRQ((IRQn_Type)irqNumber);
}
#if USB_DEVICE_CONFIG_USE_TASK
void USB_DeviceTaskFn(void *deviceHandle)
{
    USB_DeviceLpcIp3511TaskFunction(deviceHandle);
}
#endif
/*!
 * @brief CDC class specific callback function.
 *
 * This function handles the CDC class specific requests.
 *
 * @param handle          The CDC ACM class handle.
 * @param event           The CDC ACM class event type.
 * @param param           The parameter of the class specific request.
 *
 * @return A USB error code or kStatus_USB_Success.
 */
usb_status_t USB_DeviceCdcVcomCallback(class_handle_t handle, uint32_t event, void *param)
{
    uint32_t len;
    uint8_t *uartBitmap;
    usb_device_cdc_acm_request_param_struct_t *acmReqParam;
    usb_device_endpoint_callback_message_struct_t *epCbParam;
    usb_status_t error          = kStatus_USB_Error;
    usb_cdc_acm_info_t *acmInfo = &s_usbCdcAcmInfo;
    acmReqParam                 = (usb_device_cdc_acm_request_param_struct_t *)param;
    epCbParam                   = (usb_device_endpoint_callback_message_struct_t *)param;
    switch (event)
    {
        case kUSB_DeviceCdcEventSendResponse:
        {
            if ((epCbParam->length != 0) && (!(epCbParam->length % g_UsbDeviceCdcVcomDicEndpoints[0].maxPacketSize)))
            {
                /* If the last packet is the size of endpoint, then send also zero-ended packet,
                 ** meaning that we want to inform the host that we do not have any additional
                 ** data, so it can flush the output.
                 */
                error = USB_DeviceCdcAcmSend(handle, USB_CDC_VCOM_BULK_IN_ENDPOINT, NULL, 0);
            }
            else if ((1 == s_cdcVcom.attach) && (1 == s_cdcVcom.startTransactions))
            {
                if ((epCbParam->buffer != NULL) || ((epCbParam->buffer == NULL) && (epCbParam->length == 0)))
                {
                    /* User: add your own code for send complete event */
                    /* Schedule buffer for next receive event */
                    error = USB_DeviceCdcAcmRecv(handle, USB_CDC_VCOM_BULK_OUT_ENDPOINT, rxBuffer,
                                                 g_UsbDeviceCdcVcomDicEndpoints[0].maxPacketSize);
#if defined(FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED) && (FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED > 0U) && \
    defined(USB_DEVICE_CONFIG_KEEP_ALIVE_MODE) && (USB_DEVICE_CONFIG_KEEP_ALIVE_MODE > 0U) &&             \
    defined(FSL_FEATURE_USB_KHCI_USB_RAM) && (FSL_FEATURE_USB_KHCI_USB_RAM > 0U)
                    s_waitForDataReceive = 1;
                    USB0->INTEN &= ~USB_INTEN_SOFTOKEN_MASK;
#endif
                }
            }
            else
            {
            }
        }
        break;
        case kUSB_DeviceCdcEventRecvResponse:
        {
            if ((1 == s_cdcVcom.attach) && (1 == s_cdcVcom.startTransactions))
            {
                rxDataSize = epCbParam->length;

#if defined(FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED) && (FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED > 0U) && \
    defined(USB_DEVICE_CONFIG_KEEP_ALIVE_MODE) && (USB_DEVICE_CONFIG_KEEP_ALIVE_MODE > 0U) &&             \
    defined(FSL_FEATURE_USB_KHCI_USB_RAM) && (FSL_FEATURE_USB_KHCI_USB_RAM > 0U)
                s_waitForDataReceive = 0;
                USB0->INTEN |= USB_INTEN_SOFTOKEN_MASK;
#endif
                if (!rxDataSize)
                {
                    /* Schedule buffer for next receive event */
                    error = USB_DeviceCdcAcmRecv(handle, USB_CDC_VCOM_BULK_OUT_ENDPOINT, rxBuffer,
                                                 g_UsbDeviceCdcVcomDicEndpoints[0].maxPacketSize);
#if defined(FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED) && (FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED > 0U) && \
    defined(USB_DEVICE_CONFIG_KEEP_ALIVE_MODE) && (USB_DEVICE_CONFIG_KEEP_ALIVE_MODE > 0U) &&             \
    defined(FSL_FEATURE_USB_KHCI_USB_RAM) && (FSL_FEATURE_USB_KHCI_USB_RAM > 0U)
                    s_waitForDataReceive = 1;
                    USB0->INTEN &= ~USB_INTEN_SOFTOKEN_MASK;
#endif
                }
            }
        }
        break;
        case kUSB_DeviceCdcEventSerialStateNotif:
            ((usb_device_cdc_acm_struct_t *)handle)->hasSentState = 0;
            error                                                 = kStatus_USB_Success;
            break;
        case kUSB_DeviceCdcEventSendEncapsulatedCommand:
            break;
        case kUSB_DeviceCdcEventGetEncapsulatedResponse:
            break;
        case kUSB_DeviceCdcEventSetCommFeature:
            if (USB_DEVICE_CDC_FEATURE_ABSTRACT_STATE == acmReqParam->setupValue)
            {
                if (1 == acmReqParam->isSetup)
                {
                    *(acmReqParam->buffer) = s_abstractState;
                }
                else
                {
                    *(acmReqParam->length) = 0;
                }
            }
            else if (USB_DEVICE_CDC_FEATURE_COUNTRY_SETTING == acmReqParam->setupValue)
            {
                if (1 == acmReqParam->isSetup)
                {
                    *(acmReqParam->buffer) = s_countryCode;
                }
                else
                {
                    *(acmReqParam->length) = 0;
                }
            }
            else
            {
            }
            error = kStatus_USB_Success;
            break;
        case kUSB_DeviceCdcEventGetCommFeature:
            if (USB_DEVICE_CDC_FEATURE_ABSTRACT_STATE == acmReqParam->setupValue)
            {
                *(acmReqParam->buffer) = s_abstractState;
                *(acmReqParam->length) = COMM_FEATURE_DATA_SIZE;
            }
            else if (USB_DEVICE_CDC_FEATURE_COUNTRY_SETTING == acmReqParam->setupValue)
            {
                *(acmReqParam->buffer) = s_countryCode;
                *(acmReqParam->length) = COMM_FEATURE_DATA_SIZE;
            }
            else
            {
            }
            error = kStatus_USB_Success;
            break;
        case kUSB_DeviceCdcEventClearCommFeature:
            break;
        case kUSB_DeviceCdcEventGetLineCoding:
            *(acmReqParam->buffer) = s_lineCoding;
            *(acmReqParam->length) = LINE_CODING_SIZE;
            error                  = kStatus_USB_Success;
            break;
        case kUSB_DeviceCdcEventSetLineCoding:
        {
            if (1 == acmReqParam->isSetup)
            {
                *(acmReqParam->buffer) = s_lineCoding;
            }
            else
            {
                *(acmReqParam->length) = 0;
            }
        }
            error = kStatus_USB_Success;
            break;
        case kUSB_DeviceCdcEventSetControlLineState:
        {
            s_usbCdcAcmInfo.dteStatus = acmReqParam->setupValue;
            /* activate/deactivate Tx carrier */
            if (acmInfo->dteStatus & USB_DEVICE_CDC_CONTROL_SIG_BITMAP_CARRIER_ACTIVATION)
            {
                acmInfo->uartState |= USB_DEVICE_CDC_UART_STATE_TX_CARRIER;
            }
            else
            {
                acmInfo->uartState &= (uint16_t)~USB_DEVICE_CDC_UART_STATE_TX_CARRIER;
            }

            /* activate carrier and DTE. Com port of terminal tool running on PC is open now */
            if (acmInfo->dteStatus & USB_DEVICE_CDC_CONTROL_SIG_BITMAP_DTE_PRESENCE)
            {
                acmInfo->uartState |= USB_DEVICE_CDC_UART_STATE_RX_CARRIER;
            }
            /* Com port of terminal tool running on PC is closed now */
            else
            {
                acmInfo->uartState &= (uint16_t)~USB_DEVICE_CDC_UART_STATE_RX_CARRIER;
            }

            /* Indicates to DCE if DTE is present or not */
            acmInfo->dtePresent = (acmInfo->dteStatus & USB_DEVICE_CDC_CONTROL_SIG_BITMAP_DTE_PRESENCE) ? 1 : 0;

            /* Initialize the serial state buffer */
            acmInfo->serialStateBuf[0] = NOTIF_REQUEST_TYPE;                /* bmRequestType */
            acmInfo->serialStateBuf[1] = USB_DEVICE_CDC_NOTIF_SERIAL_STATE; /* bNotification */
            acmInfo->serialStateBuf[2] = 0x00;                              /* wValue */
            acmInfo->serialStateBuf[3] = 0x00;
            acmInfo->serialStateBuf[4] = 0x00; /* wIndex */
            acmInfo->serialStateBuf[5] = 0x00;
            acmInfo->serialStateBuf[6] = UART_BITMAP_SIZE; /* wLength */
            acmInfo->serialStateBuf[7] = 0x00;
            /* Notify to host the line state */
            acmInfo->serialStateBuf[4] = acmReqParam->interfaceIndex;
            /* Lower byte of UART BITMAP */
            uartBitmap    = (uint8_t *)&acmInfo->serialStateBuf[NOTIF_PACKET_SIZE + UART_BITMAP_SIZE - 2];
            uartBitmap[0] = acmInfo->uartState & 0xFFu;
            uartBitmap[1] = (acmInfo->uartState >> 8) & 0xFFu;
            len           = (uint32_t)(NOTIF_PACKET_SIZE + UART_BITMAP_SIZE);
            if (0 == ((usb_device_cdc_acm_struct_t *)handle)->hasSentState)
            {
                error = USB_DeviceCdcAcmSend(handle, USB_CDC_VCOM_INTERRUPT_IN_ENDPOINT, acmInfo->serialStateBuf, len);
                if (kStatus_USB_Success != error)
                {
                    //usb_echo("kUSB_DeviceCdcEventSetControlLineState error!");
                }
                ((usb_device_cdc_acm_struct_t *)handle)->hasSentState = 1;
            }

            /* Update status */
            if (acmInfo->dteStatus & USB_DEVICE_CDC_CONTROL_SIG_BITMAP_CARRIER_ACTIVATION)
            {
                /*  To do: CARRIER_ACTIVATED */
            }
            else
            {
                /* To do: CARRIER_DEACTIVATED */
            }
            if (acmInfo->dteStatus & USB_DEVICE_CDC_CONTROL_SIG_BITMAP_DTE_PRESENCE)
            {
                /* DTE_ACTIVATED */
                if (1 == s_cdcVcom.attach)
                {
                    s_cdcVcom.startTransactions = 1;
#if defined(FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED) && (FSL_FEATURE_USB_KHCI_KEEP_ALIVE_ENABLED > 0U) && \
    defined(USB_DEVICE_CONFIG_KEEP_ALIVE_MODE) && (USB_DEVICE_CONFIG_KEEP_ALIVE_MODE > 0U) &&             \
    defined(FSL_FEATURE_USB_KHCI_USB_RAM) && (FSL_FEATURE_USB_KHCI_USB_RAM > 0U)
                    s_waitForDataReceive = 1;
                    USB0->INTEN &= ~USB_INTEN_SOFTOKEN_MASK;
                    s_comOpen = 1;
                    usb_echo("USB_APP_CDC_DTE_ACTIVATED\r\n");
#endif
                }
            }
            else
            {
                /* DTE_DEACTIVATED */
                if (1 == s_cdcVcom.attach)
                {
                    s_cdcVcom.startTransactions = 0;
                }
            }
        }
        break;
        case kUSB_DeviceCdcEventSendBreak:
            break;
        default:
            break;
    }

    return error;
}

/*!
 * @brief USB device callback function.
 *
 * This function handles the usb device specific requests.
 *
 * @param handle          The USB device handle.
 * @param event           The USB device event type.
 * @param param           The parameter of the device specific request.
 *
 * @return A USB error code or kStatus_USB_Success.
 */
usb_status_t USB_DeviceCallback(usb_device_handle handle, uint32_t event, void *param)
{
    usb_status_t error = kStatus_USB_Error;
    uint16_t *temp16   = (uint16_t *)param;
    uint8_t *temp8     = (uint8_t *)param;

    switch (event)
    {
        case kUSB_DeviceEventBusReset:
        {
            s_cdcVcom.attach               = 0;
            s_cdcVcom.currentConfiguration = 0U;
#if (defined(USB_DEVICE_CONFIG_EHCI) && (USB_DEVICE_CONFIG_EHCI > 0U)) || \
    (defined(USB_DEVICE_CONFIG_LPCIP3511HS) && (USB_DEVICE_CONFIG_LPCIP3511HS > 0U))
            /* Get USB speed to configure the device, including max packet size and interval of the endpoints. */
            if (kStatus_USB_Success == USB_DeviceClassGetSpeed(CONTROLLER_ID, &s_cdcVcom.speed))
            {
                USB_DeviceSetSpeed(handle, s_cdcVcom.speed);
            }
#endif
        }
        break;
        case kUSB_DeviceEventSetConfiguration:
            if (0U == (*temp8))
            {
                s_cdcVcom.attach               = 0;
                s_cdcVcom.currentConfiguration = 0U;
            }
            else if (USB_CDC_VCOM_CONFIGURE_INDEX == (*temp8))
            {
                s_cdcVcom.attach               = 1;
                s_cdcVcom.currentConfiguration = *temp8;
                /* Schedule buffer for receive */
                USB_DeviceCdcAcmRecv(s_cdcVcom.cdcAcmHandle, USB_CDC_VCOM_BULK_OUT_ENDPOINT, rxBuffer,
                                     g_UsbDeviceCdcVcomDicEndpoints[0].maxPacketSize);
            }
            else
            {
                error = kStatus_USB_InvalidRequest;
            }
            break;
        case kUSB_DeviceEventSetInterface:
            if (s_cdcVcom.attach)
            {
                uint8_t interface        = (uint8_t)((*temp16 & 0xFF00U) >> 0x08U);
                uint8_t alternateSetting = (uint8_t)(*temp16 & 0x00FFU);
                if (interface < USB_CDC_VCOM_INTERFACE_COUNT)
                {
                    s_cdcVcom.currentInterfaceAlternateSetting[interface] = alternateSetting;
                }
            }
            break;
        case kUSB_DeviceEventGetConfiguration:
            break;
        case kUSB_DeviceEventGetInterface:
            break;
        case kUSB_DeviceEventGetDeviceDescriptor:
            if (param)
            {
                error = USB_DeviceGetDeviceDescriptor(handle, (usb_device_get_device_descriptor_struct_t *)param);
            }
            break;
        case kUSB_DeviceEventGetConfigurationDescriptor:
            if (param)
            {
                error = USB_DeviceGetConfigurationDescriptor(handle,
                                                             (usb_device_get_configuration_descriptor_struct_t *)param);
            }
            break;
        case kUSB_DeviceEventGetStringDescriptor:
            if (param)
            {
                /* Get device string descriptor request */
                error = USB_DeviceGetStringDescriptor(handle, (usb_device_get_string_descriptor_struct_t *)param);
            }
            break;
        default:
            break;
    }

    return error;
}

/*!
 * @brief Application initialization function.
 *
 * This function initializes the application.
 *
 * @return None.
 */
void USB_Init(void)
{
	if(usb.initialized)
	{
		return;
	}

	usb.initialized = true;

    USB_DeviceClockInit();
#if (defined(FSL_FEATURE_SOC_SYSMPU_COUNT) && (FSL_FEATURE_SOC_SYSMPU_COUNT > 0U))
    SYSMPU_Enable(SYSMPU, 0);
#endif /* FSL_FEATURE_SOC_SYSMPU_COUNT */

    usb.rxDataIndex = 0;

    s_cdcVcom.speed        = USB_SPEED_FULL;
    s_cdcVcom.attach       = 0;
    s_cdcVcom.cdcAcmHandle = (class_handle_t)NULL;
    s_cdcVcom.deviceHandle = NULL;

    if (kStatus_USB_Success != USB_DeviceClassInit(CONTROLLER_ID, &s_cdcAcmConfigList, &s_cdcVcom.deviceHandle))
    {
        //usb_echo("USB device init failed\r\n");
    }
    else
    {
        usb_echo("USB device CDC virtual com demo\r\n");
        s_cdcVcom.cdcAcmHandle = s_cdcAcmConfigList.config->classHandle;
    }

    USB_DeviceIsrEnable();

    /*Add one delay here to make the DP pull down long enough to allow host to detect the previous disconnection.*/
    SDK_DelayAtLeastUs(5000, SDK_DEVICE_MAXIMUM_CPU_CLOCK_FREQUENCY);
    USB_DeviceRun(s_cdcVcom.deviceHandle);
}

/*!
 * @brief Application task function.
 *
 * This function runs the task for application.
 *
 * @return None.
 */
void USB_Update(void)
{
    usb_status_t error = kStatus_USB_Error;
    if ((1 == s_cdcVcom.attach) && (1 == s_cdcVcom.startTransactions))
    {
        /* User Code */
        /* endpoint callback length is USB_CANCELLED_TRANSFER_LENGTH (0xFFFFFFFFU) when transfer is canceled */
        if ((0 != rxDataSize) && (USB_CANCELLED_TRANSFER_LENGTH != rxDataSize))
        {

        	usb.rxDataIndex = 0;

			//copy to rxDataBuffer for processing
			for (int32_t i = 0; i < rxDataSize; i++)
			{
				usb.rxDataBuffer[usb.rxDataIndex++] = rxBuffer[i];
			}
			uint32_t tempDataSize = rxDataSize;	//temp variable to pass to USB_ProcessData()
			rxDataSize = 0;

			if(usb.programMode)	//ProgramMode = send data for write to FLASH
			{
				FU_WriteProgramDataToFLASH();
			}
			else
			{
				//Process String
				USB_ProcessString(tempDataSize);
			}

        }
#if 0	//Transmit
        if (txDataSize)
        {
            uint32_t size = txDataSize;
            txDataSize    = 0;

            error = USB_DeviceCdcAcmSend(s_cdcVcom.cdcAcmHandle, USB_CDC_VCOM_BULK_IN_ENDPOINT, txBuffer, size);

            if (error != kStatus_USB_Success)
            {
                /* Failure to send Data Handling code here */
            }
        }
#endif
    }
}

//Send data to via USB
void USB_SendString(uint8_t * str)
{
	if(!s_cdcVcom.attach)			//exit if USB not connected
	{
		return;
	}

	uint32_t length = strlen(str);

	if(length > USB_BUFFER_SIZE - 1)	//allow for LF char
	{
		return;	//TODO: handle this better. Use a txRingbuffer
	}

	//copy data to txBuffer
	memcpy(txBuffer, str, length);
	txBuffer[length++] = CR;		//append CR for realterm
	txBuffer[length++] = LF;		//append LF for windows
	txDataSize = length;

#if 1	//Send data

	//Wait for USB ready
	// TODO: Need to timeout here
	SYSTEM_DATA_t *sys = system_getSys();
	uint32_t timeout = sys->systemTime + 100;
	while(!((1 == s_cdcVcom.attach) && (1 == s_cdcVcom.startTransactions)))
	{
		if (sys->systemTime > timeout)
		{
			txDataSize = 0;
			return;
		}
	}

	uint32_t size = txDataSize;
	txDataSize    = 0;

	usb_status_t error = USB_DeviceCdcAcmSend(s_cdcVcom.cdcAcmHandle, USB_CDC_VCOM_BULK_IN_ENDPOINT, txBuffer, size);
	if (error != kStatus_USB_Success)
	{
		/* Failure to send Data Handling code here */
		usb.sendErrorCount++;
	}

#endif

}

#if 0	//main function from example
int main(void)
{
    /* attach 12 MHz clock to FLEXCOMM0 (debug console) */
    CLOCK_AttachClk(BOARD_DEBUG_UART_CLK_ATTACH);
    BOARD_InitPins();
    BOARD_BootClockPLL150M();
    CLOCK_SetupFROClocking(96000000U); /*!< Set up high frequency FRO output to selected frequency */
    BOARD_InitDebugConsole();
    POWER_DisablePD(kPDRUNCFG_PD_USB0_PHY); /*Turn on USB Phy */

    USB_Init();

    while (1)
    {
        USB_Update();

    }
}
#endif