201 lines
6.8 KiB
C
201 lines
6.8 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include "board.h"
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#include "exceptions.h"
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#include "board_lowlevel.h"
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#include <core_cm3.h>
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//------------------------------------------------------------------------------
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// External Variables
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//------------------------------------------------------------------------------
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// Stack top
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extern unsigned int _estack;
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// Vector start address
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extern unsigned int _vect_start;
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// Initialize segments
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extern unsigned int _sfixed;
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extern unsigned int _sfixed;
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extern unsigned int _efixed;
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extern unsigned int _srelocate;
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extern unsigned int _erelocate;
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extern unsigned int _szero;
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extern unsigned int _ezero;
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#if defined(psram)
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extern unsigned int _svectorrelocate;
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extern unsigned int _evectorrelocate;
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#endif
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//------------------------------------------------------------------------------
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// ProtoTypes
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//------------------------------------------------------------------------------
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extern int main(void);
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void ResetException(void);
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//------------------------------------------------------------------------------
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// Exception Table
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//------------------------------------------------------------------------------
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__attribute__((section(".vectors")))
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IntFunc exception_table[] = {
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// Configure Initial Stack Pointer, using linker-generated symbols
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(IntFunc)&_estack,
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ResetException,
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NMI_Handler,
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HardFault_Handler,
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MemManage_Handler,
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BusFault_Handler,
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UsageFault_Handler,
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0, 0, 0, 0, // Reserved
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SVC_Handler,
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DebugMon_Handler,
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0, // Reserved
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PendSV_Handler,
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SysTick_Handler,
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// Configurable interrupts
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SUPC_IrqHandler, // 0 SUPPLY CONTROLLER
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RSTC_IrqHandler, // 1 RESET CONTROLLER
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RTC_IrqHandler, // 2 REAL TIME CLOCK
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RTT_IrqHandler, // 3 REAL TIME TIMER
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WDT_IrqHandler, // 4 WATCHDOG TIMER
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PMC_IrqHandler, // 5 PMC
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EFC0_IrqHandler, // 6 EFC0
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EFC1_IrqHandler, // 7 EFC1
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DBGU_IrqHandler, // 8 DBGU
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HSMC4_IrqHandler, // 9 HSMC4
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PIOA_IrqHandler, // 10 Parallel IO Controller A
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PIOB_IrqHandler, // 11 Parallel IO Controller B
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PIOC_IrqHandler, // 12 Parallel IO Controller C
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USART0_IrqHandler, // 13 USART 0
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USART1_IrqHandler, // 14 USART 1
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USART2_IrqHandler, // 15 USART 2
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USART3_IrqHandler, // 16 USART 3
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MCI0_IrqHandler, // 17 Multimedia Card Interface
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TWI0_IrqHandler, // 18 TWI 0
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TWI1_IrqHandler, // 19 TWI 1
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SPI0_IrqHandler, // 20 Serial Peripheral Interface
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SSC0_IrqHandler, // 21 Serial Synchronous Controller 0
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TC0_IrqHandler, // 22 Timer Counter 0
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TC1_IrqHandler, // 23 Timer Counter 1
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TC2_IrqHandler, // 24 Timer Counter 2
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PWM_IrqHandler, // 25 Pulse Width Modulation Controller
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ADCC0_IrqHandler, // 26 ADC controller0
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ADCC1_IrqHandler, // 27 ADC controller1
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HDMA_IrqHandler, // 28 HDMA
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USBD_IrqHandler, // 29 USB Device High Speed UDP_HS
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IrqHandlerNotUsed // 30 not used
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};
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#if defined(BOARD_USB_DFU) && !defined(dfu)
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static void BootIntoApp(void)
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{
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unsigned int *pSrc;
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void (*appReset)(void);
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pSrc = (unsigned int *) ((unsigned char *)AT91C_IFLASH0 + BOARD_DFU_BOOT_SIZE);
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AT91C_BASE_NVIC->NVIC_VTOFFR = ((unsigned int)(pSrc)) | (0x0 << 7);
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appReset = pSrc[1];
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appReset();
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}
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#endif
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//------------------------------------------------------------------------------
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/// This is the code that gets called on processor reset. To initialize the
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/// device. And call the main() routine.
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//------------------------------------------------------------------------------
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void ResetException(void)
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{
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unsigned int *pSrc, *pDest;
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LowLevelInit();
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#if defined(BOARD_USB_DFU) && !defined(dfu)
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#ifdef BOARD_DFU_BTN_PIOA
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/* There is a PIO button that can be used to enter DFU */
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOA;
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AT91C_BASE_PIOA->PIO_PPUER = (1 << BOARD_DFU_BTN_PIOA);
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AT91C_BASE_PIOA->PIO_ODR = (1 << BOARD_DFU_BTN_PIOA);
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AT91C_BASE_PIOA->PIO_PER = (1 << BOARD_DFU_BTN_PIOA);
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if (AT91C_BASE_PIOA->PIO_PDSR & (1 << BOARD_DFU_BTN_PIOA) &&
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#else /* BOARD_DFU_BTN_PIOA */
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if (1 &&
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#endif /* BOARD_DFU_BTN_PIOA */
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(unsigned long *)AT91C_IRAM != 0xDFDFDFDF) {
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BootIntoApp();
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}
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#endif
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#if defined(psram)
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pDest = &_vect_start;
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pSrc = &_svectorrelocate;
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for(; pSrc < &_evectorrelocate;) {
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*pDest++ = *pSrc++;
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}
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#endif
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// Initialize data
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pSrc = &_efixed;
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pDest = &_srelocate;
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if (pSrc != pDest) {
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for(; pDest < &_erelocate;) {
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*pDest++ = *pSrc++;
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}
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}
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// Zero fill bss
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for(pDest = &_szero; pDest < &_ezero;) {
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*pDest++ = 0;
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}
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#if defined(psram)
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pSrc = (unsigned int *)&_vect_start;
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#else
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pSrc = (unsigned int *)&_sfixed;
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#endif
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AT91C_BASE_NVIC->NVIC_VTOFFR = ((unsigned int)(pSrc)) | (0x0 << 7);
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/* APP should have disabled interrupts during the transition */
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__enable_irq();
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main();
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}
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