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openblt/Target/Source/com.c

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/************************************************************************************//**
* \file Source\com.c
* \brief Bootloader communication interface source file.
* \ingroup Core
* \internal
*----------------------------------------------------------------------------------------
* C O P Y R I G H T
*----------------------------------------------------------------------------------------
* Copyright (c) 2011 by Feaser http://www.feaser.com All rights reserved
*
*----------------------------------------------------------------------------------------
* L I C E N S E
*----------------------------------------------------------------------------------------
* This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with OpenBLT.
* If not, see <http://www.gnu.org/licenses/>.
*
* A special exception to the GPL is included to allow you to distribute a combined work
* that includes OpenBLT without being obliged to provide the source code for any
* proprietary components. The exception text is included at the bottom of the license
* file <license.html>.
*
* \endinternal
****************************************************************************************/
/****************************************************************************************
* Include files
****************************************************************************************/
#include "boot.h" /* bootloader generic header */
#if (BOOT_COM_CAN_ENABLE > 0)
#include "can.h" /* can driver module */
#endif
#if (BOOT_COM_UART_ENABLE > 0)
#include "uart.h" /* uart driver module */
#endif
#if (BOOT_COM_USB_ENABLE > 0)
#include "usb.h" /* usb driver module */
#endif
#if (BOOT_COM_NET_ENABLE > 0)
#include "net.h" /* tcp/ip driver module */
#endif
#if (BOOT_COM_ENABLE > 0)
/****************************************************************************************
* Local data declarations
****************************************************************************************/
/** \brief Holds the communication interface of the currently active interface. */
static tComInterfaceId comActiveInterface = COM_IF_OTHER;
/************************************************************************************//**
** \brief Initializes the communication module including the hardware needed for
** the communication.
** \return none
**
****************************************************************************************/
void ComInit(void)
{
/* initialize the XCP communication protocol */
XcpInit();
#if (BOOT_COM_CAN_ENABLE > 0)
/* initialize the CAN controller */
CanInit();
/* set it as active */
comActiveInterface = COM_IF_CAN;
#endif
#if (BOOT_COM_UART_ENABLE > 0)
/* initialize the UART interface */
UartInit();
/* set it as active */
comActiveInterface = COM_IF_UART;
#endif
#if (BOOT_COM_USB_ENABLE > 0)
/* initialize the USB interface */
UsbInit();
/* set it as active */
comActiveInterface = COM_IF_USB;
#endif
#if (BOOT_COM_NET_ENABLE > 0)
/* initialize the TCP/IP interface */
NetInit();
/* set it as active */
comActiveInterface = COM_IF_NET;
#endif
} /*** end of ComInit ***/
/************************************************************************************//**
** \brief Updates the communication module by checking if new data was received
** and submitting the request to process newly received data.
** \return none
**
****************************************************************************************/
void ComTask(void)
{
/* make xcpCtoReqPacket static for runtime efficiency */
static blt_int8u xcpCtoReqPacket[BOOT_COM_RX_MAX_DATA];
#if (BOOT_COM_CAN_ENABLE > 0)
if (CanReceivePacket(&xcpCtoReqPacket[0]) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_CAN;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0]);
}
#endif
#if (BOOT_COM_UART_ENABLE > 0)
if (UartReceivePacket(&xcpCtoReqPacket[0]) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_UART;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0]);
}
#endif
#if (BOOT_COM_USB_ENABLE > 0)
if (UsbReceivePacket(&xcpCtoReqPacket[0]) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_USB;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0]);
}
#endif
#if (BOOT_COM_NET_ENABLE > 0)
if (NetReceivePacket(&xcpCtoReqPacket[0]) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_NET;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0]);
}
#endif
} /*** end of ComTask ***/
/************************************************************************************//**
** \brief Releases the communication module.
** \return none
**
****************************************************************************************/
void ComFree(void)
{
#if (BOOT_COM_USB_ENABLE > 0)
/* disconnect the usb device from the usb host */
UsbFree();
#endif
} /*** end of ComFree ***/
/************************************************************************************//**
** \brief Transmits the packet using the xcp transport layer.
** \param data Pointer to the byte buffer with packet data.
** \param len Number of data bytes that need to be transmitted.
** \return none
**
****************************************************************************************/
void ComTransmitPacket(blt_int8u *data, blt_int16u len)
{
#if (BOOT_COM_CAN_ENABLE > 0)
/* transmit the packet. note that len is limited to 8 in the plausibility check,
* so cast is okay.
*/
if (comActiveInterface == COM_IF_CAN)
{
CanTransmitPacket(data, (blt_int8u)len);
}
#endif
#if (BOOT_COM_UART_ENABLE > 0)
/* transmit the packet. note that len is limited to 255 in the plausibility check,
* so cast is okay.
*/
if (comActiveInterface == COM_IF_UART)
{
UartTransmitPacket(data, (blt_int8u)len);
}
#endif
#if (BOOT_COM_USB_ENABLE > 0)
/* transmit the packet */
if (comActiveInterface == COM_IF_USB)
{
UsbTransmitPacket(data, len);
}
#endif
#if (BOOT_COM_NET_ENABLE > 0)
if (comActiveInterface == COM_IF_NET)
{
/* transmit the packet */
NetTransmitPacket(data, len);
}
#endif
/* send signal that the packet was transmitted */
XcpPacketTransmitted();
} /*** end of ComTransmitPacket ***/
/************************************************************************************//**
** \brief Obtains the maximum number of bytes that can be received on the specified
** communication interface.
** \return Maximum number of bytes that can be received.
**
****************************************************************************************/
blt_int16u ComGetActiveInterfaceMaxRxLen(void)
{
blt_int16u result;
/* filter on communication interface identifier */
switch (comActiveInterface)
{
case COM_IF_UART:
result = BOOT_COM_UART_RX_MAX_DATA;
break;
case COM_IF_CAN:
result = BOOT_COM_CAN_RX_MAX_DATA;
break;
case COM_IF_USB:
result = BOOT_COM_USB_RX_MAX_DATA;
break;
case COM_IF_NET:
result = BOOT_COM_NET_RX_MAX_DATA;
break;
default:
result = BOOT_COM_RX_MAX_DATA;
break;
}
return result;
} /*** end of ComGetActiveInterfaceMaxRxLen ***/
/************************************************************************************//**
** \brief Obtains the maximum number of bytes that can be transmitted on the
** specified communication interface.
** \return Maximum number of bytes that can be received.
**
****************************************************************************************/
blt_int16u ComGetActiveInterfaceMaxTxLen(void)
{
blt_int16u result;
/* filter on communication interface identifier */
switch (comActiveInterface)
{
case COM_IF_UART:
result = BOOT_COM_UART_TX_MAX_DATA;
break;
case COM_IF_CAN:
result = BOOT_COM_CAN_TX_MAX_DATA;
break;
case COM_IF_USB:
result = BOOT_COM_USB_TX_MAX_DATA;
break;
case COM_IF_NET:
result = BOOT_COM_NET_TX_MAX_DATA;
break;
default:
result = BOOT_COM_TX_MAX_DATA;
break;
}
return result;
} /*** end of ComGetActiveInterfaceMaxTxLen ***/
/************************************************************************************//**
** \brief This function obtains the XCP connection state.
** \return BLT_TRUE when an XCP connection is established, BLT_FALSE otherwise.
**
****************************************************************************************/
blt_bool ComIsConnected(void)
{
return XcpIsConnected();
} /*** end of ComIsConnected ***/
#endif /* BOOT_COM_ENABLE > 0 */
/*********************************** end of com.c **************************************/
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