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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 have received a copy of the GNU General Public License along with OpenBLT. It
* should be located in ".\Doc\license.html". If not, contact Feaser to obtain a copy.
*
* \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_RS232_ENABLE > 0)
#include "rs232.h" /* rs232 driver module */
#endif
#if (BOOT_COM_MBRTU_ENABLE > 0)
#include "mb.h" /* modbus 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_RS232_ENABLE > 0)
/* initialize the RS232 interface */
Rs232Init();
/* set it as active */
comActiveInterface = COM_IF_RS232;
#endif
#if (BOOT_COM_MBRTU_ENABLE > 0)
/* initialize the Modbus RTU interface */
MbRtuInit();
/* set it as active */
comActiveInterface = COM_IF_MBRTU;
#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)
#if (BOOT_COM_NET_DEFERRED_INIT_ENABLE == 0)
/* initialize the TCP/IP interface */
NetInit();
/* set it as active */
comActiveInterface = COM_IF_NET;
#endif
#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)
{
blt_int8u xcpPacketLen;
/* 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], &xcpPacketLen) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_CAN;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0], xcpPacketLen);
}
#endif
#if (BOOT_COM_RS232_ENABLE > 0)
if (Rs232ReceivePacket(&xcpCtoReqPacket[0], &xcpPacketLen) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_RS232;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0], xcpPacketLen);
}
#endif
#if (BOOT_COM_MBRTU_ENABLE > 0)
if (MbRtuReceivePacket(&xcpCtoReqPacket[0], &xcpPacketLen) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_MBRTU;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0], xcpPacketLen);
}
#endif
#if (BOOT_COM_USB_ENABLE > 0)
if (UsbReceivePacket(&xcpCtoReqPacket[0], &xcpPacketLen) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_USB;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0], xcpPacketLen);
}
#endif
#if (BOOT_COM_NET_ENABLE > 0)
if (NetReceivePacket(&xcpCtoReqPacket[0], &xcpPacketLen) == BLT_TRUE)
{
/* make this the active interface */
comActiveInterface = COM_IF_NET;
/* process packet */
XcpPacketReceived(&xcpCtoReqPacket[0], xcpPacketLen);
}
#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_RS232_ENABLE > 0)
/* transmit the packet. note that len is limited to 255 in the plausibility check,
* so cast is okay.
*/
if (comActiveInterface == COM_IF_RS232)
{
Rs232TransmitPacket(data, (blt_int8u)len);
}
#endif
#if (BOOT_COM_MBRTU_ENABLE > 0)
/* transmit the packet. note that len is limited to 255 in the plausibility check,
* so cast is okay.
*/
if (comActiveInterface == COM_IF_MBRTU)
{
MbRtuTransmitPacket(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_RS232:
result = BOOT_COM_RS232_RX_MAX_DATA;
break;
case COM_IF_MBRTU:
result = BOOT_COM_MBRTU_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_RS232:
result = BOOT_COM_RS232_TX_MAX_DATA;
break;
case COM_IF_MBRTU:
result = BOOT_COM_MBRTU_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)
{
blt_bool result = BLT_FALSE;
/* Is there an active XCP connection? This indicates that the communication interface
* is in the connection state.
*/
if (XcpIsConnected())
{
result = BLT_TRUE;
}
#if (ADDON_GATEWAY_MOD_ENABLE > 0)
/* Is the gateway active? This indicates an XCP connection with a slave. */
if (GatewayIsActive())
{
result = BLT_TRUE;
}
#endif
/* give the result back to the caller. */
return result;
} /*** end of ComIsConnected ***/
#if (BOOT_COM_DEFERRED_INIT_ENABLE == 1)
/************************************************************************************//**
** \brief The deferred init feature makes it possible to bypass the initialization of
** a communication interface until this function is called. This feature can
** be enabled for a specific communication interface via macro
** BOOT_COM_XXX_DEFERRED_INIT_ENABLE in blt_conf.h. At this point only the NET
** communication interface supports this feature, as its initialization can
** take quite a long time. If there is a valid user program present, then this
** would cause an unwanted delay after each reset before the user program can
** be started.
** \attention Note that when this feature is enabled for a communication interface, the
** communication interface is only enabled when: (a) no valid user program is
** present or (b) when CpuUserProgramStartHook() returns BLT_FALSE. This means
** that after a normal reactivation of the bootloader from the user program,
** the communication interface is not initialized and firmware updates are
** not possible! In this case it is recommended to somehow pass on the
** communication initialization request from the user program to the
** bootloader. When this request detected by the bootloader application, this
** function should be called. EEPROM or shared RAM can be used to pass on such
** a request.
** \return none
**
****************************************************************************************/
void ComDeferredInit(void)
{
#if (BOOT_COM_NET_ENABLE > 0)
#if (BOOT_COM_NET_DEFERRED_INIT_ENABLE == 1)
/* perform deferred initialization the TCP/IP interface */
NetDeferredInit();
/* set it as active */
comActiveInterface = COM_IF_NET;
#endif
#endif
#if (BOOT_BACKDOOR_HOOKS_ENABLE == 0)
/* the default internal timed backdoor mechanism should start its timer after the
* communication interfaces are initialized. since a deferred initialization was now
* performed, the backdoor timer should be restarted.
*/
BackDoorRestartTimer();
#endif
} /*** end of ComDeferredInit ***/
#endif /* BOOT_COM_DEFERRED_INIT_ENABLE == 1 */
#endif /* BOOT_COM_ENABLE > 0 */
/*********************************** end of com.c **************************************/
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