mirror of https://github.com/rusefi/openblt.git
184 lines
7.4 KiB
C
184 lines
7.4 KiB
C
/****************************************************************************************
|
|
| Description: demo program bootloader interface source file
|
|
| File Name: boot.c
|
|
|
|
|
|----------------------------------------------------------------------------------------
|
|
| C O P Y R I G H T
|
|
|----------------------------------------------------------------------------------------
|
|
| Copyright (c) 2012 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>.
|
|
|
|
|
****************************************************************************************/
|
|
|
|
/****************************************************************************************
|
|
* Include files
|
|
****************************************************************************************/
|
|
#include "header.h" /* generic header */
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: BootActivate
|
|
** PARAMETER: none
|
|
** RETURN VALUE: none
|
|
** DESCRIPTION: Bootloader activation function.
|
|
**
|
|
****************************************************************************************/
|
|
static void BootActivate(void)
|
|
{
|
|
void (*pEntryFromProgFnc)(void);
|
|
|
|
/* stop the timer interrupt */
|
|
TimerDeinit();
|
|
/* set pointer to the address of function EntryFromProg in the bootloader. note that
|
|
* 1 is added to this address to enable a switch from Thumb2 to Thumb mode
|
|
*/
|
|
pEntryFromProgFnc = (void*)0x000000B8 + 1;
|
|
/* call EntryFromProg to activate the bootloader. */
|
|
pEntryFromProgFnc();
|
|
} /*** 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
|
|
****************************************************************************************/
|
|
|
|
/****************************************************************************************
|
|
* Function prototypes
|
|
****************************************************************************************/
|
|
static unsigned char UartReceiveByte(unsigned char *data);
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: BootComInit
|
|
** PARAMETER: none
|
|
** RETURN VALUE: none
|
|
** DESCRIPTION: Initializes the UART communication interface
|
|
**
|
|
****************************************************************************************/
|
|
void BootComInit(void)
|
|
{
|
|
LEUART_Init_TypeDef init = LEUART_INIT_DEFAULT;
|
|
|
|
/* configure GPIO pins */
|
|
CMU_ClockEnable(cmuClock_GPIO, true);
|
|
/* to avoid false start, configure output as high */
|
|
GPIO_PinModeSet(gpioPortC, 6, gpioModePushPull, 1);
|
|
GPIO_PinModeSet(gpioPortC, 7, gpioModeInput, 0);
|
|
/* enable CORE LE clock in order to access LE modules */
|
|
CMU_ClockEnable(cmuClock_CORELE, true);
|
|
/* select LFXO for LEUARTs (and wait for it to stabilize) */
|
|
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
|
|
/* do not prescale clock */
|
|
CMU_ClockDivSet(cmuClock_LEUART1, cmuClkDiv_1);
|
|
/* enable LEUART1 clock */
|
|
CMU_ClockEnable(cmuClock_LEUART1, true);
|
|
/* configure LEUART */
|
|
init.enable = leuartDisable;
|
|
LEUART_Init(LEUART1, &init);
|
|
LEUART_BaudrateSet(LEUART1, 0, BOOT_COM_UART_BAUDRATE);
|
|
/* enable pins at default location */
|
|
LEUART1->ROUTE = LEUART_ROUTE_RXPEN | LEUART_ROUTE_TXPEN;
|
|
/* clear previous RX interrupts */
|
|
LEUART_IntClear(LEUART1, LEUART_IF_RXDATAV);
|
|
/* finally enable it */
|
|
LEUART_Enable(LEUART1, leuartEnable);
|
|
} /*** end of BootComInit ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: BootComCheckActivationRequest
|
|
** PARAMETER: none
|
|
** RETURN VALUE: none
|
|
** DESCRIPTION: Receives the CONNECT request from the host, which indicates that the
|
|
** bootloader should be activated and, if so, activates it.
|
|
**
|
|
****************************************************************************************/
|
|
void BootComCheckActivationRequest(void)
|
|
{
|
|
static unsigned char xcpCtoReqPacket[BOOT_COM_UART_RX_MAX_DATA+1];
|
|
static unsigned char xcpCtoRxLength;
|
|
static unsigned char xcpCtoRxInProgress = 0;
|
|
|
|
/* start of cto packet received? */
|
|
if (xcpCtoRxInProgress == 0)
|
|
{
|
|
/* store the message length when received */
|
|
if (UartReceiveByte(&xcpCtoReqPacket[0]) == 1)
|
|
{
|
|
/* 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();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} /*** end of BootComCheckActivationRequest ***/
|
|
|
|
|
|
/****************************************************************************************
|
|
** NAME: UartReceiveByte
|
|
** PARAMETER: data pointer to byte where the data is to be stored.
|
|
** RETURN VALUE: 1 if a byte was received, 0 otherwise.
|
|
** DESCRIPTION: Receives a communication interface byte if one is present.
|
|
**
|
|
****************************************************************************************/
|
|
static unsigned char UartReceiveByte(unsigned char *data)
|
|
{
|
|
/* check to see if a new bytes was received */
|
|
if ((LEUART1->IF & LEUART_IF_RXDATAV) != 0)
|
|
{
|
|
/* store the received data byte and set return value to positive */
|
|
*data = LEUART_Rx(LEUART1);
|
|
return 1;
|
|
}
|
|
/* still here to no new byte received */
|
|
return 0;
|
|
} /*** end of UartReceiveByte ***/
|
|
#endif /* BOOT_COM_UART_ENABLE > 0 */
|
|
|
|
|
|
/*********************************** end of boot.c *************************************/
|