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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2010, Atmel Corporation
* Copyright (c) 2017, Harald Welte <laforge@gnumonks.org>
* Copyright (c) 2018, sysmocom -s.f.m.c. GmbH, Author: Kevin Redon <kredon@sysmocom.de>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "board.h"
#include "board_lowlevel.h"
/*----------------------------------------------------------------------------
* Exported variables
*----------------------------------------------------------------------------*/
/* Stack Configuration */
#define STACK_SIZE 0x900 /** Stack size (in DWords) */
__attribute__ ((aligned(8),section(".stack")))
uint32_t pdwStack[STACK_SIZE] ;
/* Initialize segments */
extern uint32_t _sfixed;
extern uint32_t _efixed;
extern uint32_t _etext;
extern uint32_t _srelocate;
extern uint32_t _erelocate;
extern uint32_t _szero;
extern uint32_t _ezero;
/*----------------------------------------------------------------------------
* ProtoTypes
*----------------------------------------------------------------------------*/
/** \cond DOXYGEN_SHOULD_SKIP_THIS */
extern int main( void ) ;
/** \endcond */
void ResetException( void ) ;
/*------------------------------------------------------------------------------
* Exception Table
*------------------------------------------------------------------------------*/
__attribute__((section(".vectors")))
IntFunc exception_table[] = {
/* Configure Initial Stack Pointer, using linker-generated symbols */
(IntFunc)(&pdwStack[STACK_SIZE-1]),
ResetException,
NMI_Handler,
HardFault_Handler,
MemManage_Handler,
BusFault_Handler,
UsageFault_Handler,
0, 0, 0, 0, /* Reserved */
SVC_Handler,
DebugMon_Handler,
0, /* Reserved */
PendSV_Handler,
SysTick_Handler,
/* Configurable interrupts */
SUPC_IrqHandler, /* 0 Supply Controller */
RSTC_IrqHandler, /* 1 Reset Controller */
RTC_IrqHandler, /* 2 Real Time Clock */
RTT_IrqHandler, /* 3 Real Time Timer */
WDT_IrqHandler, /* 4 Watchdog Timer */
PMC_IrqHandler, /* 5 PMC */
EEFC_IrqHandler, /* 6 EEFC */
IrqHandlerNotUsed, /* 7 Reserved */
UART0_IrqHandler, /* 8 UART0 */
UART1_IrqHandler, /* 9 UART1 */
SMC_IrqHandler, /* 10 SMC */
PIOA_IrqHandler, /* 11 Parallel IO Controller A */
PIOB_IrqHandler, /* 12 Parallel IO Controller B */
PIOC_IrqHandler, /* 13 Parallel IO Controller C */
USART0_IrqHandler, /* 14 USART 0 */
USART1_IrqHandler, /* 15 USART 1 */
IrqHandlerNotUsed, /* 16 Reserved */
IrqHandlerNotUsed, /* 17 Reserved */
MCI_IrqHandler, /* 18 MCI */
TWI0_IrqHandler, /* 19 TWI 0 */
TWI1_IrqHandler, /* 20 TWI 1 */
SPI_IrqHandler, /* 21 SPI */
SSC_IrqHandler, /* 22 SSC */
TC0_IrqHandler, /* 23 Timer Counter 0 */
TC1_IrqHandler, /* 24 Timer Counter 1 */
TC2_IrqHandler, /* 25 Timer Counter 2 */
TC3_IrqHandler, /* 26 Timer Counter 3 */
TC4_IrqHandler, /* 27 Timer Counter 4 */
TC5_IrqHandler, /* 28 Timer Counter 5 */
ADC_IrqHandler, /* 29 ADC controller */
DAC_IrqHandler, /* 30 DAC controller */
PWM_IrqHandler, /* 31 PWM */
CRCCU_IrqHandler, /* 32 CRC Calculation Unit */
ACC_IrqHandler, /* 33 Analog Comparator */
USBD_IrqHandler, /* 34 USB Device Port */
IrqHandlerNotUsed /* 35 not used */
};
#if defined(BOARD_USB_DFU) && defined(APPLICATION_dfu) && defined(ENVIRONMENT_flash)
#include "usb/device/dfu/dfu.h"
static void BootIntoApp(void)
{
unsigned int *pSrc;
void (*appReset)(void);
pSrc = (unsigned int *) ((unsigned char *)IFLASH_ADDR + BOARD_DFU_BOOT_SIZE);
/* set vector table to application vector table (store at the beginning of the application) */
SCB->VTOR = (unsigned int)(pSrc);
/* set stack pointer to address provided in the beginning of the application (loaded into a register first) */
__asm__ volatile ("MSR msp,%0" : :"r"(*pSrc));
/* start application (by jumping to the reset function which address is stored as second entry of the vector table) */
appReset = (void(*)(void))pSrc[1];
g_dfu->state = DFU_STATE_appIDLE;
appReset();
}
#endif
/**
* \brief This is the code that gets called on processor reset.
* To initialize the device, and call the main() routine.
*/
void ResetException( void )
{
uint32_t *pSrc, *pDest ;
/* Low level Initialize */
LowLevelInit() ;
#if defined(BOARD_USB_DFU) && defined(APPLICATION_dfu) && defined(ENVIRONMENT_flash)
// boot application if there is not DFU override
if (!USBDFU_OverrideEnterDFU() && SCB->VTOR < IFLASH_ADDR + BOARD_DFU_BOOT_SIZE) {
UART_Exit();
__disable_irq();
BootIntoApp();
/* Infinite loop */
while ( 1 ) ;
}
#endif
/* Initialize the relocate segment */
pSrc = &_etext ;
pDest = &_srelocate ;
if ( pSrc != pDest )
{
for ( ; pDest < &_erelocate ; )
{
*pDest++ = *pSrc++ ;
}
}
/* Clear the zero segment */
for ( pDest = &_szero ; pDest < &_ezero ; )
{
*pDest++ = 0;
}
/* Set the vector table base address */
pSrc = (uint32_t *)&_sfixed;
SCB->VTOR = ( (uint32_t)pSrc & SCB_VTOR_TBLOFF_Msk ) ;
if ( ((uint32_t)pSrc >= IRAM_ADDR) && ((uint32_t)pSrc < IRAM_ADDR+IRAM_SIZE) )
{
SCB->VTOR |= 1 << SCB_VTOR_TBLBASE_Pos ;
}
/* App should have disabled interrupts during the transition */
__enable_irq();
/* Branch to main function */
main() ;
/* Infinite loop */
while ( 1 ) ;
}
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