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openblt/Target/Demo/ARMCM4_XMC4_XMC4700_Relax_K.../Prog/boot.c

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/************************************************************************************//**
* \file Demo/ARMCM4_XMC4_XMC4700_Relax_Kit_IAR/Prog/boot.c
* \brief Demo program bootloader interface source file.
* \ingroup Prog_ARMCM4_XMC4_XMC4700_Relax_Kit_IAR
* \internal
*----------------------------------------------------------------------------------------
* C O P Y R I G H T
*----------------------------------------------------------------------------------------
* Copyright (c) 2017 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 "header.h" /* generic header */
#include "xmc_gpio.h" /* GPIO module */
#include "xmc_uart.h" /* UART driver header */
#include "xmc_can.h" /* CAN driver header */
/****************************************************************************************
* Function prototypes
****************************************************************************************/
#if (BOOT_COM_UART_ENABLE > 0)
static void BootComUartInit(void);
static void BootComUartCheckActivationRequest(void);
#endif
#if (BOOT_COM_CAN_ENABLE > 0)
static void BootComCanInit(void);
static void BootComCanCheckActivationRequest(void);
#endif
/************************************************************************************//**
** \brief Initializes the communication interface.
** \return none.
**
****************************************************************************************/
void BootComInit(void)
{
#if (BOOT_COM_UART_ENABLE > 0)
BootComUartInit();
#endif
#if (BOOT_COM_CAN_ENABLE > 0)
BootComCanInit();
#endif
} /*** end of BootComInit ***/
/************************************************************************************//**
** \brief Receives the CONNECT request from the host, which indicates that the
** bootloader should be activated and, if so, activates it.
** \return none.
**
****************************************************************************************/
void BootComCheckActivationRequest(void)
{
#if (BOOT_COM_UART_ENABLE > 0)
BootComUartCheckActivationRequest();
#endif
#if (BOOT_COM_CAN_ENABLE > 0)
BootComCanCheckActivationRequest();
#endif
} /*** end of BootComCheckActivationRequest ***/
/************************************************************************************//**
** \brief Bootloader activation function.
** \return none.
**
****************************************************************************************/
void BootActivate(void)
{
/* perform software reset to activate the bootoader again */
NVIC_SystemReset();
} /*** end of BootActivate ***/
#if (BOOT_COM_UART_ENABLE > 0)
/****************************************************************************************
* U N I V E R S A L A S Y N C H R O N O U S R X T X I N T E R F A C E
****************************************************************************************/
/****************************************************************************************
* Macro definitions
****************************************************************************************/
/** \brief Timeout time for the reception of a CTO packet. The timer is started upon
* reception of the first packet byte.
*/
#define UART_CTO_RX_PACKET_TIMEOUT_MS (100u)
/****************************************************************************************
* Function prototypes
****************************************************************************************/
static unsigned char UartReceiveByte(unsigned char *data);
/************************************************************************************//**
** \brief Initializes the UART communication interface.
** \return none.
**
****************************************************************************************/
static void BootComUartInit(void)
{
XMC_GPIO_CONFIG_t rx_config;
XMC_GPIO_CONFIG_t tx_config;
XMC_UART_CH_CONFIG_t uart_config;
/* set configuration and initialize UART channel */
uart_config.baudrate = BOOT_COM_UART_BAUDRATE;
uart_config.data_bits = 8;
uart_config.frame_length = 8;
uart_config.stop_bits = 1;
uart_config.oversampling = 16;
uart_config.parity_mode = XMC_USIC_CH_PARITY_MODE_NONE;
XMC_UART_CH_Init(XMC_UART0_CH0, &uart_config);
/* initialize UART Rx pin */
rx_config.mode = XMC_GPIO_MODE_INPUT_TRISTATE;
rx_config.output_level = XMC_GPIO_OUTPUT_LEVEL_HIGH;
rx_config.output_strength = XMC_GPIO_OUTPUT_STRENGTH_STRONG_SOFT_EDGE;
XMC_GPIO_Init(P1_4, &rx_config);
/* initialize UART Tx pin */
tx_config.mode = XMC_GPIO_MODE_OUTPUT_PUSH_PULL_ALT2;
tx_config.output_level = XMC_GPIO_OUTPUT_LEVEL_HIGH;
tx_config.output_strength = XMC_GPIO_OUTPUT_STRENGTH_STRONG_SOFT_EDGE;
XMC_GPIO_Init(P1_5, &tx_config);
/* set input source path to DXnB to connect P1_4 to ASC Receive. note that this
* function must be called after XMC_UART_CH_Init(), which is called when initializing
* the bootloader core with BootInit().
*/
XMC_USIC_CH_SetInputSource(XMC_UART0_CH0, XMC_USIC_CH_INPUT_DX0, 1U);
/* configure small transmit and receive FIFO */
XMC_USIC_CH_TXFIFO_Configure(XMC_UART0_CH0, 16U, XMC_USIC_CH_FIFO_SIZE_16WORDS, 1U);
XMC_USIC_CH_RXFIFO_Configure(XMC_UART0_CH0, 0U, XMC_USIC_CH_FIFO_SIZE_16WORDS, 1U);
/* start UART */
XMC_UART_CH_Start(XMC_UART0_CH0);
} /*** end of BootComUartInit ***/
/************************************************************************************//**
** \brief Receives the CONNECT request from the host, which indicates that the
** bootloader should be activated and, if so, activates it.
** \return none.
**
****************************************************************************************/
static void BootComUartCheckActivationRequest(void)
{
static unsigned char xcpCtoReqPacket[BOOT_COM_UART_RX_MAX_DATA+1];
static unsigned char xcpCtoRxLength;
static unsigned char xcpCtoRxInProgress = 0;
static unsigned long xcpCtoRxStartTime = 0;
/* start of cto packet received? */
if (xcpCtoRxInProgress == 0)
{
/* store the message length when received */
if (UartReceiveByte(&xcpCtoReqPacket[0]) == 1)
{
/* check that the length has a valid value. it should not be 0 */
if ( (xcpCtoReqPacket[0] > 0) &&
(xcpCtoReqPacket[0] <= BOOT_COM_UART_RX_MAX_DATA) )
{
/* store the start time */
xcpCtoRxStartTime = TimerGet();
/* indicate that a cto packet is being received */
xcpCtoRxInProgress = 1;
/* reset packet data count */
xcpCtoRxLength = 0;
}
}
}
else
{
/* store the next packet byte */
if (UartReceiveByte(&xcpCtoReqPacket[xcpCtoRxLength+1]) == 1)
{
/* increment the packet data count */
xcpCtoRxLength++;
/* check to see if the entire packet was received */
if (xcpCtoRxLength == xcpCtoReqPacket[0])
{
/* done with cto packet reception */
xcpCtoRxInProgress = 0;
/* check if this was an XCP CONNECT command */
if ((xcpCtoReqPacket[1] == 0xff) && (xcpCtoReqPacket[2] == 0x00))
{
/* connection request received so start the bootloader */
BootActivate();
}
}
}
else
{
/* check packet reception timeout */
if (TimerGet() > (xcpCtoRxStartTime + UART_CTO_RX_PACKET_TIMEOUT_MS))
{
/* cancel cto packet reception due to timeout. note that this automatically
* discards the already received packet bytes, allowing the host to retry.
*/
xcpCtoRxInProgress = 0;
}
}
}
} /*** end of BootComUartCheckActivationRequest ***/
/************************************************************************************//**
** \brief Receives a communication interface byte if one is present.
** \param data Pointer to byte where the data is to be stored.
** \return 1 if a byte was received, 0 otherwise.
**
****************************************************************************************/
static unsigned char UartReceiveByte(unsigned char *data)
{
if (XMC_USIC_CH_RXFIFO_IsEmpty(XMC_UART0_CH0) == 0)
{
/* retrieve and store the newly received byte */
*data = (unsigned char)XMC_UART_CH_GetReceivedData(XMC_UART0_CH0);
/* all done */
return 1;
}
/* still here to no new byte received */
return 0;
} /*** end of UartReceiveByte ***/
#endif /* BOOT_COM_UART_ENABLE > 0 */
#if (BOOT_COM_CAN_ENABLE > 0)
/****************************************************************************************
* C O N T R O L L E R A R E A N E T W O R K I N T E R F A C E
****************************************************************************************/
/****************************************************************************************
* Local data declarations
****************************************************************************************/
/** \brief Receive message object data structure. */
static XMC_CAN_MO_t receiveMsgObj;
/************************************************************************************//**
** \brief Initializes the CAN communication interface.
** \return none.
**
****************************************************************************************/
static void BootComCanInit(void)
{
XMC_GPIO_CONFIG_t rx_can_config;
XMC_GPIO_CONFIG_t tx_can_config;
unsigned char byteIdx;
unsigned long canModuleFreqHz;
XMC_CAN_NODE_NOMINAL_BIT_TIME_CONFIG_t baud;
unsigned long receiveId;
/* decide on fCAN frequency. it should be in the 5-120MHz range. according to the
* datasheet, it must be at least 12MHz if 1 node (channel) is used with up to
* 16 message objects. This is sufficient for this CAN driver.
*/
canModuleFreqHz = XMC_SCU_CLOCK_GetPeripheralClockFrequency();
/* increase if too low */
while (canModuleFreqHz < 12000000)
{
canModuleFreqHz *= 2;
}
/* decrease if too high */
while (canModuleFreqHz > 120000000)
{
canModuleFreqHz /= 2;
}
/* configure CAN module*/
XMC_CAN_Init(CAN, XMC_CAN_CANCLKSRC_FPERI, canModuleFreqHz);
/* configure CAN node baudrate */
baud.can_frequency = canModuleFreqHz;
baud.baudrate = BOOT_COM_CAN_BAUDRATE;
baud.sample_point = 8000;
baud.sjw = 1,
XMC_CAN_NODE_NominalBitTimeConfigure(CAN_NODE1, &baud);
/* set CCE and INIT bit NCR for node configuration */
XMC_CAN_NODE_EnableConfigurationChange(CAN_NODE1);
XMC_CAN_NODE_SetInitBit(CAN_NODE1);
/* configure the receive message object */
receiveMsgObj.can_mo_ptr = CAN_MO1;
receiveMsgObj.can_priority = XMC_CAN_ARBITRATION_MODE_IDE_DIR_BASED_PRIO_2;
/* set the receive CAN identifier and negate the bit that configures it as a
* 29-bit extended CAN identifier.
*/
receiveId = BOOT_COM_CAN_RX_MSG_ID;
receiveId &= ~0x80000000;
if ((BOOT_COM_CAN_RX_MSG_ID & 0x80000000) == 0)
{
/* 11-bit standard CAN identifier */
receiveMsgObj.can_identifier = receiveId;
receiveMsgObj.can_id_mask = receiveId;
receiveMsgObj.can_id_mode = XMC_CAN_FRAME_TYPE_STANDARD_11BITS;
XMC_CAN_MO_AcceptOnlyMatchingIDE(&receiveMsgObj);
}
else
{
/* 29-bit extended CAN identifier */
receiveMsgObj.can_identifier = receiveId;
receiveMsgObj.can_id_mask = receiveId;
receiveMsgObj.can_id_mode = XMC_CAN_FRAME_TYPE_EXTENDED_29BITS;
XMC_CAN_MO_AcceptOnlyMatchingIDE(&receiveMsgObj);
}
receiveMsgObj.can_data_length = BOOT_COM_CAN_RX_MAX_DATA;
for (byteIdx=0; byteIdx<receiveMsgObj.can_data_length; byteIdx++)
{
receiveMsgObj.can_data_byte[byteIdx] = 0;
}
receiveMsgObj.can_mo_type = XMC_CAN_MO_TYPE_RECMSGOBJ;
XMC_CAN_MO_Config(&receiveMsgObj);
/* allocate receive message object to the channel */
XMC_CAN_AllocateMOtoNodeList(CAN, 1, 1);
/* reset CCE and INIT bit NCR for node configuration */
XMC_CAN_NODE_DisableConfigurationChange(CAN_NODE1);
XMC_CAN_NODE_ResetInitBit(CAN_NODE1);
/* configure CAN receive pin */
rx_can_config.mode = XMC_GPIO_MODE_INPUT_TRISTATE;
XMC_GPIO_Init(P1_13, &rx_can_config);
/* configure CAN transmit pin */
tx_can_config.mode = XMC_GPIO_MODE_OUTPUT_PUSH_PULL_ALT2;
tx_can_config.output_level = XMC_GPIO_OUTPUT_LEVEL_HIGH;
tx_can_config.output_strength = XMC_GPIO_OUTPUT_STRENGTH_STRONG_SOFT_EDGE;
XMC_GPIO_Init(P1_12, &tx_can_config);
/* select CAN Receive Input C (N1_RXDC) to map P1_13 to CAN_NODE1 */
XMC_CAN_NODE_EnableConfigurationChange(CAN_NODE1);
XMC_CAN_NODE_SetReceiveInput(CAN_NODE1, XMC_CAN_NODE_RECEIVE_INPUT_RXDCC);
XMC_CAN_NODE_DisableConfigurationChange(CAN_NODE1);
} /*** end of BootComCanInit ***/
/************************************************************************************//**
** \brief Receives the CONNECT request from the host, which indicates that the
** bootloader should be activated and, if so, activates it.
** \return none.
**
****************************************************************************************/
static void BootComCanCheckActivationRequest(void)
{
unsigned char byteIdx;
unsigned char rxMsgData[8];
unsigned char rxMsgReceived = 0;
/* check if a new message was received */
if ((XMC_CAN_MO_GetStatus(&receiveMsgObj) & XMC_CAN_MO_STATUS_RX_PENDING) != 0)
{
/* read out and process the newly received data */
if (XMC_CAN_MO_Receive(&receiveMsgObj) == XMC_CAN_STATUS_SUCCESS)
{
for (byteIdx=0; byteIdx<receiveMsgObj.can_data_length; byteIdx++)
{
rxMsgData[byteIdx] = receiveMsgObj.can_data_byte[byteIdx];
/* set flag that message was received */
rxMsgReceived = 1;
}
}
/* reset the message received flag */
XMC_CAN_MO_ResetStatus(&receiveMsgObj, XMC_CAN_MO_RESET_STATUS_RX_PENDING);
}
/* process received message */
if (rxMsgReceived == 1)
{
/* reset flag */
rxMsgReceived = 0;
/* check if this was an XCP CONNECT command */
if ((rxMsgData[0] == 0xff) && (rxMsgData[1] == 0x00))
{
/* connection request received so start the bootloader */
BootActivate();
}
}
} /*** end of BootComCanCheckActivationRequest ***/
#endif /* BOOT_COM_CAN_ENABLE > 0 */
/*********************************** end of boot.c *************************************/
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