cr_startup_8xx.c

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// *****************************************************************************
//   +--+
//   | ++----+
//   +-++    |
//     |     |
//   +-+--+  |
//   | +--+--+
//   +----+    Copyright (c) 2012 Code Red Technologies Ltd.
//
// LPC8xx Microcontroller Startup code for use with Red Suite
//
// Version : 121107
//
// 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)))

// #if defined (__USE_CMSIS)
// #include "LPC8xx.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 SVC_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 SPI0_IRQHandler(void) ALIAS(IntDefaultHandler);
void SPI1_IRQHandler(void) ALIAS(IntDefaultHandler);
void UART0_IRQHandler(void) ALIAS(IntDefaultHandler);
void UART1_IRQHandler(void) ALIAS(IntDefaultHandler);
void UART2_IRQHandler(void) ALIAS(IntDefaultHandler);
void I2C_IRQHandler(void) ALIAS(IntDefaultHandler);
void SCT_IRQHandler(void) ALIAS(IntDefaultHandler);
void MRT_IRQHandler(void) ALIAS(IntDefaultHandler);
void CMP_IRQHandler(void) ALIAS(IntDefaultHandler);
void WDT_IRQHandler(void) ALIAS(IntDefaultHandler);
void BOD_IRQHandler(void) ALIAS(IntDefaultHandler);
void FLASH_IRQHandler(void) ALIAS(IntDefaultHandler);
void WKT_IRQHandler(void) ALIAS(IntDefaultHandler);
void PININT0_IRQHandler(void) ALIAS(IntDefaultHandler);
void PININT1_IRQHandler(void) ALIAS(IntDefaultHandler);
void PININT2_IRQHandler(void) ALIAS(IntDefaultHandler);
void PININT3_IRQHandler(void) ALIAS(IntDefaultHandler);
void PININT4_IRQHandler(void) ALIAS(IntDefaultHandler);
void PININT5_IRQHandler(void) ALIAS(IntDefaultHandler);
void PININT6_IRQHandler(void) ALIAS(IntDefaultHandler);
void PININT7_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.
// This relies on the linker script to place at correct location in memory.
//
// *****************************************************************************
extern void(*const g_pfnVectors[]) (void);
__attribute__ ((section(".isr_vector")))
void(*const g_pfnVectors[]) (void) = {
 // Core Level - CM0plus
 &_vStackTop,// The initial stack pointer
 ResetISR,      // The reset handler
 NMI_Handler,     // The NMI handler
 HardFault_Handler,    // The hard fault handler
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 SVC_Handler,     // SVCall handler
 0,        // Reserved
 0,        // Reserved
 PendSV_Handler,     // The PendSV handler
 SysTick_Handler,    // The SysTick handler

 // Chip Level - LPC8xx
 SPI0_IRQHandler,    // SPI0 controller
 SPI1_IRQHandler,    // SPI1 controller
 0,        // Reserved
 UART0_IRQHandler,    // UART0
 UART1_IRQHandler,    // UART1
 UART2_IRQHandler,    // UART2
 0,        // Reserved
 0,        // Reserved
 I2C_IRQHandler,     // I2C controller
 SCT_IRQHandler,     // Smart Counter Timer
 MRT_IRQHandler,     // Multi-Rate Timer
 CMP_IRQHandler,     // Comparator
 WDT_IRQHandler,     // Watchdog
 BOD_IRQHandler,     // Brown Out Detect
 FLASH_IRQHandler,    // FLASH
 WKT_IRQHandler,     // Wakeup timer
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 0,        // Reserved
 PININT0_IRQHandler,    // PIO INT0
 PININT1_IRQHandler,    // PIO INT1
 PININT2_IRQHandler,    // PIO INT2
 PININT3_IRQHandler,    // PIO INT3
 PININT4_IRQHandler,    // PIO INT4
 PININT5_IRQHandler,    // PIO INT5
 PININT6_IRQHandler,    // PIO INT6
 PININT7_IRQHandler,    // PIO INT7
}; /* End of g_pfnVectors */

// *****************************************************************************
// 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);
 }
 extern void SystemInit(void);

 SystemInit();

#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 SVCall_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 specific
// handler is not present in the application code.
//
// *****************************************************************************
__attribute__ ((section(".after_vectors")))
void IntDefaultHandler(void)
{
 while (1) {}
}