//*****************************************************************************
//   +--+       
//   | ++----+   
//   +-++    |  
//     |     |  
//   +-+--+  |   
//   | +--+--+  
//   +----+    Copyright (c) 2012 Code Red Technologies Ltd.
//
// NXP LPC13U Microcontroller Startup code for use with Red Suite
//
// Version : 120202
//
// Software License Agreement
// 
// The software is owned by Code Red Technologies and/or its suppliers, and is 
// protected under applicable copyright laws.  All rights are reserved.  Any 
// use in violation of the foregoing restrictions may subject the user to criminal 
// sanctions under applicable laws, as well as to civil liability for the breach 
// of the terms and conditions of this license.
// 
// THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
// OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
// USE OF THIS SOFTWARE FOR COMMERCIAL DEVELOPMENT AND/OR EDUCATION IS SUBJECT
// TO A CURRENT END USER LICENSE AGREEMENT (COMMERCIAL OR EDUCATIONAL) WITH
// CODE RED TECHNOLOGIES LTD. 
//
//*****************************************************************************
#if defined (__cplusplus)
#ifdef __REDLIB__
#error Redlib does not support C++
#else
//*****************************************************************************
//
// The entry point for the C++ library startup
//
//*****************************************************************************
extern "C" {
	extern void __libc_init_array(void);
}
#endif
#endif

#define WEAK __attribute__ ((weak))
#define ALIAS(f) __attribute__ ((weak, alias (#f)))

// Code Red - if CMSIS is being used, then SystemInit() routine
// will be called by startup code rather than in application's main()
#if defined (__USE_CMSIS)
#include "LPC13Uxx.h"
#endif

//*****************************************************************************
#if defined (__cplusplus)
extern "C" {
#endif

//*****************************************************************************
//
// Forward declaration of the default handlers. These are aliased.
// When the application defines a handler (with the same name), this will 
// automatically take precedence over these weak definitions
//
//*****************************************************************************
void ResetISR(void);
WEAK void NMI_Handler(void);
WEAK void HardFault_Handler(void);
WEAK void MemManage_Handler(void);
WEAK void BusFault_Handler(void);
WEAK void UsageFault_Handler(void);
WEAK void SVC_Handler(void);
WEAK void DebugMon_Handler(void);
WEAK void PendSV_Handler(void);
WEAK void SysTick_Handler(void);
WEAK void IntDefaultHandler(void);
//*****************************************************************************
//
// Forward declaration of the specific IRQ handlers. These are aliased
// to the IntDefaultHandler, which is a 'forever' loop. When the application
// defines a handler (with the same name), this will automatically take 
// precedence over these weak definitions
//
//*****************************************************************************
void PIN_INT0_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIN_INT1_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIN_INT2_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIN_INT3_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIN_INT4_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIN_INT5_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIN_INT6_IRQHandler(void) ALIAS(IntDefaultHandler);
void PIN_INT7_IRQHandler(void) ALIAS(IntDefaultHandler);
void GINT0_IRQHandler(void) ALIAS(IntDefaultHandler);
void GINT1_IRQHandler(void) ALIAS(IntDefaultHandler);
void OSTIMER_IRQHandler(void) ALIAS(IntDefaultHandler);
void SSP1_IRQHandler(void) ALIAS(IntDefaultHandler);
void I2C_IRQHandler(void) ALIAS(IntDefaultHandler);
void CT16B0_IRQHandler(void) ALIAS(IntDefaultHandler);
void CT16B1_IRQHandler(void) ALIAS(IntDefaultHandler);
void CT32B0_IRQHandler(void) ALIAS(IntDefaultHandler);
void CT32B1_IRQHandler(void) ALIAS(IntDefaultHandler);
void SSP0_IRQHandler(void) ALIAS(IntDefaultHandler);
void USART_IRQHandler(void) ALIAS(IntDefaultHandler);
void USB_IRQHandler(void) ALIAS(IntDefaultHandler);
void USB_FIQHandler(void) ALIAS(IntDefaultHandler);
void ADC_IRQHandler(void) ALIAS(IntDefaultHandler);
void WDT_IRQHandler(void) ALIAS(IntDefaultHandler);
void BOD_IRQHandler(void) ALIAS(IntDefaultHandler);
void FMC_IRQHandler(void) ALIAS(IntDefaultHandler);
void OSCFAIL_IRQHandler(void) ALIAS(IntDefaultHandler);
void PVTCIRCUIT_IRQHandler(void) ALIAS(IntDefaultHandler);
void USBWakeup_IRQHandler(void) ALIAS(IntDefaultHandler);

//*****************************************************************************
//
// The entry point for the application.
// __main() is the entry point for Redlib based applications
// main() is the entry point for Newlib based applications
//
//*****************************************************************************
#if defined (__REDLIB__)
extern void __main(void);
#endif
extern int main(void);
//*****************************************************************************
//
// External declaration for the pointer to the stack top from the Linker Script
//
//*****************************************************************************
extern void _vStackTop(void);

//*****************************************************************************
#if defined (__cplusplus)
} // extern "C"
#endif
//*****************************************************************************
//
// The vector table.  Note that the proper constructs must be placed on this to
// ensure that it ends up at physical address 0x0000.0000.
//
//*****************************************************************************
extern void (* const g_pfnVectors[])(void);
__attribute__ ((section(".isr_vector")))
void (* const g_pfnVectors[])(void) = {
	// Core Level - CM3
		&_vStackTop, // The initial stack pointer
		ResetISR, // The reset handler
		NMI_Handler, // The NMI handler
		HardFault_Handler, // The hard fault handler
		MemManage_Handler, // The MPU fault handler
		BusFault_Handler, // The bus fault handler
		UsageFault_Handler, // The usage fault handler
		0, // Reserved
		0, // Reserved
		0, // Reserved
		0, // Reserved
		SVC_Handler, // SVCall handler
		DebugMon_Handler, // Debug monitor handler
		0, // Reserved
		PendSV_Handler, // The PendSV handler
		SysTick_Handler, // The SysTick handler

        // LPC13U External Interrupts
		PIN_INT0_IRQHandler,	// All GPIO pin can be routed to PIN_INTx
		PIN_INT1_IRQHandler,
		PIN_INT2_IRQHandler,
		PIN_INT3_IRQHandler,
		PIN_INT4_IRQHandler,
		PIN_INT5_IRQHandler,
		PIN_INT6_IRQHandler,
		PIN_INT7_IRQHandler,
		GINT0_IRQHandler,
		GINT1_IRQHandler,		// PIO0 (0:7)
		0,
		0,
		OSTIMER_IRQHandler,
		0,
		SSP1_IRQHandler,		// SSP1
		I2C_IRQHandler,        	//  I2C
		CT16B0_IRQHandler,		// 16-bit Timer0
		CT16B1_IRQHandler,      // 16-bit Timer1
		CT32B0_IRQHandler,      // 32-bit Timer0
		CT32B1_IRQHandler,      // 32-bit Timer1
		SSP0_IRQHandler,        // SSP0
		USART_IRQHandler,       // USART
		USB_IRQHandler,         // USB IRQ
		USB_FIQHandler,         // USB FIQ
		ADC_IRQHandler,         // A/D Converter
		WDT_IRQHandler,         // Watchdog timer
		BOD_IRQHandler,         // Brown Out Detect
		FMC_IRQHandler,         // IP2111 Flash Memory Controller
		OSCFAIL_IRQHandler,     // OSC FAIL
		PVTCIRCUIT_IRQHandler,  // PVT CIRCUIT
		USBWakeup_IRQHandler,   // USB wake up
		0,
	};

//*****************************************************************************
// Functions to carry out the initialization of RW and BSS data sections. These
// are written as separate functions rather than being inlined within the
// ResetISR() function in order to cope with MCUs with multiple banks of
// memory.
//*****************************************************************************
__attribute__ ((section(".after_vectors")))
void data_init(unsigned int romstart, unsigned int start, unsigned int len) {
	unsigned int *pulDest = (unsigned int*) start;
	unsigned int *pulSrc = (unsigned int*) romstart;
	unsigned int loop;
	for (loop = 0; loop < len; loop = loop + 4)
		*pulDest++ = *pulSrc++;
}

__attribute__ ((section(".after_vectors")))
void bss_init(unsigned int start, unsigned int len) {
	unsigned int *pulDest = (unsigned int*) start;
	unsigned int loop;
	for (loop = 0; loop < len; loop = loop + 4)
		*pulDest++ = 0;
}

//*****************************************************************************
// The following symbols are constructs generated by the linker, indicating
// the location of various points in the "Global Section Table". This table is
// created by the linker via the Code Red managed linker script mechanism. It
// contains the load address, execution address and length of each RW data
// section and the execution and length of each BSS (zero initialized) section.
//*****************************************************************************
extern unsigned int __data_section_table;
extern unsigned int __data_section_table_end;
extern unsigned int __bss_section_table;
extern unsigned int __bss_section_table_end;

//*****************************************************************************
// Reset entry point for your code.
// Sets up a simple runtime environment and initializes the C/C++
// library.
//*****************************************************************************
__attribute__ ((section(".after_vectors")))
void
ResetISR(void) {

    //
    // Copy the data sections from flash to SRAM.
    //
	unsigned int LoadAddr, ExeAddr, SectionLen;
	unsigned int *SectionTableAddr;

	// Load base address of Global Section Table
	SectionTableAddr = &__data_section_table;

    // Copy the data sections from flash to SRAM.
	while (SectionTableAddr < &__data_section_table_end) {
		LoadAddr = *SectionTableAddr++;
		ExeAddr = *SectionTableAddr++;
		SectionLen = *SectionTableAddr++;
		data_init(LoadAddr, ExeAddr, SectionLen);
	}
	// At this point, SectionTableAddr = &__bss_section_table;
	// Zero fill the bss segment
	while (SectionTableAddr < &__bss_section_table_end) {
		ExeAddr = *SectionTableAddr++;
		SectionLen = *SectionTableAddr++;
		bss_init(ExeAddr, SectionLen);
	}

#ifdef __USE_CMSIS
	SystemInit();
#endif

#if defined (__cplusplus)
	//
	// Call C++ library initialisation
	//
	__libc_init_array();
#endif

#if defined (__REDLIB__)
	// Call the Redlib library, which in turn calls main()
	__main() ;
#else
	main();
#endif
	//
	// main() shouldn't return, but if it does, we'll just enter an infinite loop
	//
	while (1) {
		;
	}
}

//*****************************************************************************
// Default exception handlers. Override the ones here by defining your own
// handler routines in your application code.
//*****************************************************************************
__attribute__ ((section(".after_vectors")))
void NMI_Handler(void) {
	while (1) {
	}
}
__attribute__ ((section(".after_vectors")))
void HardFault_Handler(void) {
	while (1) {
	}
}
__attribute__ ((section(".after_vectors")))
void MemManage_Handler(void) {
	while (1) {
	}
}
__attribute__ ((section(".after_vectors")))
void BusFault_Handler(void) {
	while (1) {
	}
}
__attribute__ ((section(".after_vectors")))
void UsageFault_Handler(void) {
	while (1) {
	}
}
__attribute__ ((section(".after_vectors")))
void SVC_Handler(void) {
	while (1) {
	}
}
__attribute__ ((section(".after_vectors")))
void DebugMon_Handler(void) {
	while (1) {
	}
}
__attribute__ ((section(".after_vectors")))
void PendSV_Handler(void) {
	while (1) {
	}
}
__attribute__ ((section(".after_vectors")))
void SysTick_Handler(void) {
	while (1) {
	}
}

//*****************************************************************************
//
// Processor ends up here if an unexpected interrupt occurs or a handler
// is not present in the application code.
//
//*****************************************************************************
__attribute__ ((section(".after_vectors")))
void IntDefaultHandler(void) {
	//
	// Go into an infinite loop.
	//
	while (1) {
	}
}