gcc_startup_lpc5410x.c

//*****************************************************************************
//
// Startup code for use with GNU tools.
//
//*****************************************************************************


//*****************************************************************************
//
// Forward declaration of the default fault handlers.
//
//*****************************************************************************
static void Reset_Handler(void);
static void Default_Handler(void);

//*****************************************************************************
//
// External declaration for the interrupt handler used by the application.
//
//*****************************************************************************
void NMI_Handler(void)          __attribute__((weak, alias("Default_Handler")));
void HardFault_Handler(void)    __attribute__((weak, alias("Default_Handler")));
void MemManage_Handler(void)    __attribute__((weak, alias("Default_Handler")));
void BusFault_Handler(void)     __attribute__((weak, alias("Default_Handler")));
void UsageFault_Handler(void)   __attribute__((weak, alias("Default_Handler")));
void SVC_Handler(void)          __attribute__((weak, alias("Default_Handler")));
void DebugMon_Handler(void)     __attribute__((weak, alias("Default_Handler")));
void PendSV_Handler(void)       __attribute__((weak, alias("Default_Handler")));
void SysTick_Handler(void)      __attribute__((weak, alias("Default_Handler")));

void WDT_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void BOD_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void Reserved_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void DMA_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void GINT0_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));

void PIN_INT0_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void PIN_INT1_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void PIN_INT2_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void PIN_INT3_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void UTICK_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void MRT_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void CT32B0_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void CT32B1_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void CT32B2_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void CT32B3_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void CT32B4_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void SCT0_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void UART0_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void UART1_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void UART2_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void UART3_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void I2C0_IRQHandler(void)     __attribute__((weak, alias("Default_Handler")));
void I2C1_IRQHandler(void)     __attribute__((weak, alias("Default_Handler")));
void I2C2_IRQHandler(void)     __attribute__((weak, alias("Default_Handler")));
void SPI0_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void SPI1_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void ADC_SEQA_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void ADC_SEQB_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void ADC_THCMP_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
void RTC_IRQHandler(void)      __attribute__((weak, alias("Default_Handler")));
//void Reserved_IRQHandler(void)    __attribute__((weak, alias("Default_Handler")));
void MAILBOX_IRQHandler(void)   __attribute__((weak, alias("Default_Handler")));
void GINT1_IRQHandler(void)       __attribute__((weak, alias("Default_Handler")));
void PIN_INT4_IRQHandler(void)          __attribute__((weak, alias("Default_Handler")));
void PIN_INT5_IRQHandler(void)   __attribute__((weak, alias("Default_Handler")));
void PIN_INT6_IRQHandler(void)        __attribute__((weak, alias("Default_Handler")));
void PIN_INT7_IRQHandler(void)            __attribute__((weak, alias("Default_Handler")));
//void Reserved_IRQHandler(void) __attribute__((weak, alias("Default_Handler")));
//void Reserved_IRQHandler(void)          __attribute__((weak, alias("Default_Handler")));
//void Reserved_IRQHandler(void) __attribute__((weak, alias("Default_Handler")));
void RIT_IRQHandler(void)          __attribute__((weak, alias("Default_Handler")));
void Reserved41_IRQHandler(void) __attribute__((weak, alias("Default_Handler")));
void Reserved42_IRQHandler(void)          __attribute__((weak, alias("Default_Handler")));
void Reserved43_IRQHandler(void) __attribute__((weak, alias("Default_Handler")));
void Reserved44_IRQHandler(void)          __attribute__((weak, alias("Default_Handler")));
//*****************************************************************************
//
// The entry point for the application.
//
//*****************************************************************************
extern int main(void);

//*****************************************************************************
//
// Reserve space for the system stack.
//
//*****************************************************************************
static unsigned long pulStack[512];

//*****************************************************************************
//
// The vector table.  Note that the proper constructs must be placed on this to
// ensure that it ends up at physical address 0x0000.0000.
//
//*****************************************************************************
__attribute__ ((section(".isr_vector")))
void (* const g_pfnVectors[])(void) =
{
    (void (*)(void))((unsigned long)pulStack + sizeof(pulStack)),
    // The initial stack pointer
    Reset_Handler,              // Reset Handler
    NMI_Handler,                // NMI Handler
    HardFault_Handler,          // Hard Fault Handler
    MemManage_Handler,          // MPU Fault Handler
    BusFault_Handler,           // Bus Fault Handler
    UsageFault_Handler,         // Usage Fault Handler
    0,                          // Reserved
    0,                          // Reserved
    0,                          // Reserved
    0,                          // Reserved
    SVC_Handler,                // SVCall Handler
    DebugMon_Handler,           // Debug Monitor Handler
    0,                          // Reserved
    PendSV_Handler,             // PendSV Handler
    SysTick_Handler,            // SysTick Handler

    // External Interrupts
    WDT_IRQHandler,        
    BOD_IRQHandler, 
	Reserved_IRQHandler,	
    DMA_IRQHandler,        
    GINT0_IRQHandler,      
    PIN_INT0_IRQHandler,   
    PIN_INT1_IRQHandler,   
    PIN_INT2_IRQHandler,   
    PIN_INT3_IRQHandler,   
    UTICK_IRQHandler,      
    MRT_IRQHandler,        
    CT32B0_IRQHandler,     
    CT32B1_IRQHandler,     
    CT32B2_IRQHandler,     
    CT32B3_IRQHandler,     
    CT32B4_IRQHandler,     
    SCT0_IRQHandler,       
    UART0_IRQHandler,      
    UART1_IRQHandler,      
    UART2_IRQHandler,      
    UART3_IRQHandler,      
    I2C0_IRQHandler,      
    I2C1_IRQHandler,       
    I2C2_IRQHandler,       
    SPI0_IRQHandler,       
    SPI1_IRQHandler,       
    ADC_SEQA_IRQHandler,   
    ADC_SEQB_IRQHandler,   
    ADC_THCMP_IRQHandler,  
    RTC_IRQHandler,    
	Reserved_IRQHandler,    
    MAILBOX_IRQHandler,   
    GINT1_IRQHandler,      
    PIN_INT4_IRQHandler,   
    PIN_INT5_IRQHandler,   
    PIN_INT6_IRQHandler,   
    PIN_INT7_IRQHandler, 
	Reserved_IRQHandler,
	Reserved_IRQHandler,
	Reserved_IRQHandler,
	RIT_IRQHandler,       
	Reserved41_IRQHandler,	
	Reserved42_IRQHandler,
	Reserved43_IRQHandler,
	Reserved44_IRQHandler,	    
};
//**RIT_IRQHandler        ***************************************************************************
//  Reserved41_IRQHandler 
// TReserved42_IRQHandler he following are constructs created by the linker, indicating where the
// tReserved43_IRQHandler he "data" and "bss" segments reside in memory.  The initializers for the
// fReserved44_IRQHandler or the "data" segment resides immediately following the "text" segment.
//
//*****************************************************************************
extern unsigned long _etext;
extern unsigned long _data;
extern unsigned long _edata;
extern unsigned long _bss;
extern unsigned long _ebss;

//*****************************************************************************
//
// This is the code that gets called when the processor first starts execution
// following a reset event.  Only the absolutely necessary set is performed,
// after which the application supplied entry() routine is called.  Any fancy
// actions (such as making decisions based on the reset cause register, and
// resetting the bits in that register) are left solely in the hands of the
// application.
//
//*****************************************************************************
static void Reset_Handler(void)
{
    unsigned long *pulSrc, *pulDest;

    //
    // Copy the data segment initializers from flash to SRAM.
    //
    pulSrc = &_etext;
    for(pulDest = &_data; pulDest < &_edata; )
    {
        *pulDest++ = *pulSrc++;
    }
	
	
#if !defined (__USE_LPCOPEN)
// LPCOpen init code deals with FP and VTOR initialisation
#if defined (__VFP_FP__) && !defined (__SOFTFP__)
    /*
     * Code to enable the Cortex-M4 FPU only included
     * if appropriate build options have been selected.
     * Code taken from Section 7.1, Cortex-M4 TRM (DDI0439C)
     */
    // CPACR is located at address 0xE000ED88
    asm("LDR.W R0, =0xE000ED88");
    // Read CPACR
    asm("LDR R1, [R0]");
    // Set bits 20-23 to enable CP10 and CP11 coprocessors
    asm(" ORR R1, R1, #(0xF << 20)");
    // Write back the modified value to the CPACR
    asm("STR R1, [R0]");
#endif // (__VFP_FP__) && !(__SOFTFP__)
    // ******************************
    // Check to see if we are running the code from a non-zero
    // address (eg RAM, external flash), in which case we need
    // to modify the VTOR register to tell the CPU that the
    // vector table is located at a non-0x0 address.

    // Note that we do not use the CMSIS register access mechanism,
    // as there is no guarantee that the project has been configured
    // to use CMSIS.
    unsigned int * pSCB_VTOR = (unsigned int *) 0xE000ED08;
    if ((unsigned int *) g_pfnVectors != (unsigned int *) 0x00000000) {
        // CMSIS : SCB->VTOR = <address of vector table>
        *pSCB_VTOR = (unsigned int) g_pfnVectors;
    }
#endif
	
    //
    // Zero fill the bss segment.
    //
    __asm("    ldr     r0, =_bss\n"
          "    ldr     r1, =_ebss\n"
          "    mov     r2, #0\n"
          "    .thumb_func\n"
          "zero_loop:\n"
          "        cmp     r0, r1\n"
          "        it      lt\n"
          "        strlt   r2, [r0], #4\n"
          "        blt     zero_loop");

    // call system init.	
	SystemInit();

    //
    // Call the application's entry point.
    //
    main();
}

//*****************************************************************************
//
// This is the code that gets called when the processor receives an unexpected
// interrupt.  This simply enters an infinite loop, preserving the system state
// for examination by a debugger.
//
//*****************************************************************************
static void Default_Handler(void)
{
    //
    // Go into an infinite loop.
    //
    while(1)
    {
    }
}