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223 lines
8.6 KiB
C
223 lines
8.6 KiB
C
//*****************************************************************************
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//
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// startup.c - Boot code for Stellaris.
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//
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// Copyright (c) 2005-2007 Luminary Micro, Inc. All rights reserved.
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//
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// Software License Agreement
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//
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// Luminary Micro, Inc. (LMI) is supplying this software for use solely and
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// exclusively on LMI's microcontroller products.
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//
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// The software is owned by LMI and/or its suppliers, and is protected under
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// applicable copyright laws. All rights are reserved. Any use in violation
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// of the foregoing restrictions may subject the user to criminal sanctions
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// under applicable laws, as well as to civil liability for the breach of the
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// terms and conditions of this license.
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//
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// THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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// OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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// LMI SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
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// CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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//
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// This is part of revision 1049 of the Stellaris Driver Library.
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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// Forward declaration of the default fault handlers.
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//
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//*****************************************************************************
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void ResetISR(void);
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static void NmiSR(void);
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static void FaultISR(void);
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static void IntDefaultHandler(void);
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extern void xPortPendSVHandler(void);
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extern void xPortSysTickHandler(void);
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extern void vUART_ISR( void );
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extern void vGPIO_ISR( void );
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extern void vPortSVCHandler( void );
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//*****************************************************************************
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//
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// The entry point for the application.
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//
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//*****************************************************************************
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extern int main(void);
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//*****************************************************************************
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//
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// Reserve space for the system stack.
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//
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//*****************************************************************************
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#ifndef STACK_SIZE
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#define STACK_SIZE 64
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#endif
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static unsigned long pulStack[STACK_SIZE];
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//*****************************************************************************
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//
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// The minimal vector table for a Cortex-M3. Note that the proper constructs
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// must be placed on this to ensure that it ends up at physical address
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// 0x0000.0000.
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//
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//*****************************************************************************
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__attribute__ ((section(".isr_vector")))
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void (* const g_pfnVectors[])(void) =
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{
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(void (*)(void))((unsigned long)pulStack + sizeof(pulStack)),
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// The initial stack pointer
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ResetISR, // The reset handler
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NmiSR, // The NMI handler
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FaultISR, // The hard fault handler
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IntDefaultHandler, // The MPU fault handler
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IntDefaultHandler, // The bus fault handler
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IntDefaultHandler, // The usage fault handler
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0, // Reserved
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0, // Reserved
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0, // Reserved
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0, // Reserved
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vPortSVCHandler, // SVCall handler
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IntDefaultHandler, // Debug monitor handler
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0, // Reserved
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xPortPendSVHandler, // The PendSV handler
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xPortSysTickHandler, // The SysTick handler
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IntDefaultHandler, // GPIO Port A
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IntDefaultHandler, // GPIO Port B
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vGPIO_ISR, // GPIO Port C
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IntDefaultHandler, // GPIO Port D
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IntDefaultHandler, // GPIO Port E
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vUART_ISR, // UART0 Rx and Tx
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IntDefaultHandler, // UART1 Rx and Tx
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IntDefaultHandler, // SSI Rx and Tx
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IntDefaultHandler, // I2C Master and Slave
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IntDefaultHandler, // PWM Fault
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IntDefaultHandler, // PWM Generator 0
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IntDefaultHandler, // PWM Generator 1
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IntDefaultHandler, // PWM Generator 2
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IntDefaultHandler, // Quadrature Encoder
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IntDefaultHandler, // ADC Sequence 0
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IntDefaultHandler, // ADC Sequence 1
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IntDefaultHandler, // ADC Sequence 2
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IntDefaultHandler, // ADC Sequence 3
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IntDefaultHandler, // Watchdog timer
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IntDefaultHandler, // Timer 0 subtimer A
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IntDefaultHandler, // Timer 0 subtimer B
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IntDefaultHandler, // Timer 1 subtimer A
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IntDefaultHandler, // Timer 1 subtimer B
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IntDefaultHandler, // Timer 2 subtimer A
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IntDefaultHandler, // Timer 2 subtimer B
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IntDefaultHandler, // Analog Comparator 0
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IntDefaultHandler, // Analog Comparator 1
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IntDefaultHandler, // Analog Comparator 2
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IntDefaultHandler, // System Control (PLL, OSC, BO)
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IntDefaultHandler // FLASH Control
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};
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//*****************************************************************************
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//
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// The following are constructs created by the linker, indicating where the
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// the "data" and "bss" segments reside in memory. The initializers for the
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// for the "data" segment resides immediately following the "text" segment.
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//
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//*****************************************************************************
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extern unsigned long _etext;
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extern unsigned long _data;
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extern unsigned long _edata;
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extern unsigned long _bss;
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extern unsigned long _ebss;
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//*****************************************************************************
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//
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// This is the code that gets called when the processor first starts execution
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// following a reset event. Only the absolutely necessary set is performed,
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// after which the application supplied main() routine is called. Any fancy
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// actions (such as making decisions based on the reset cause register, and
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// resetting the bits in that register) are left solely in the hands of the
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// application.
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//
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//*****************************************************************************
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void
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ResetISR(void)
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{
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unsigned long *pulSrc, *pulDest;
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//
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// Copy the data segment initializers from flash to SRAM.
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//
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pulSrc = &_etext;
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for(pulDest = &_data; pulDest < &_edata; )
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{
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*pulDest++ = *pulSrc++;
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}
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//
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// Zero fill the bss segment.
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//
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for(pulDest = &_bss; pulDest < &_ebss; )
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{
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*pulDest++ = 0;
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}
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//
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// Call the application's entry point.
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//
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main();
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}
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//*****************************************************************************
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//
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// This is the code that gets called when the processor receives a NMI. This
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// simply enters an infinite loop, preserving the system state for examination
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// by a debugger.
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//
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//*****************************************************************************
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static void
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NmiSR(void)
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{
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//
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// Enter an infinite loop.
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//
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while(1)
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{
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}
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}
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//*****************************************************************************
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//
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// This is the code that gets called when the processor receives a fault
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// interrupt. This simply enters an infinite loop, preserving the system state
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// for examination by a debugger.
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//
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//*****************************************************************************
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static void
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FaultISR(void)
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{
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//
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// Enter an infinite loop.
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//
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while(1)
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{
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}
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}
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//*****************************************************************************
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//
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// This is the code that gets called when the processor receives an unexpected
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// interrupt. This simply enters an infinite loop, preserving the system state
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// for examination by a debugger.
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//
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//*****************************************************************************
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static void
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IntDefaultHandler(void)
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{
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//
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// Go into an infinite loop.
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//
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while(1)
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{
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}
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}
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