//***************************************************************************** | |
// +--+ | |
// | ++----+ | |
// +-++ | | |
// | | | |
// +-+--+ | | |
// | +--+--+ | |
// +----+ Copyright (c) 2009-10 Code Red Technologies Ltd. | |
// | |
// Microcontroller Startup code for use with Red Suite | |
// | |
// Version : 101130 | |
// | |
// 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 "system_LPC11xx.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 SVCall_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 CAN_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void SSP1_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void I2C_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void TIMER16_0_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void TIMER16_1_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void TIMER32_0_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void TIMER32_1_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void SSP0_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void UART_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void ADC_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void WDT_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void BOD_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void PIOINT3_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void PIOINT2_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void PIOINT1_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void PIOINT0_IRQHandler (void) ALIAS(IntDefaultHandler); | |
void WAKEUP_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 | |
// | |
//***************************************************************************** | |
// | |
// 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) = { | |
&_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 | |
SVCall_Handler, // SVCall handler | |
0, // Reserved | |
0, // Reserved | |
PendSV_Handler, // The PendSV handler | |
SysTick_Handler, // The SysTick handler | |
// Wakeup sources for the I/O pins: | |
// PIO0 (0:11) | |
// PIO1 (0) | |
WAKEUP_IRQHandler, // PIO0_0 Wakeup | |
WAKEUP_IRQHandler, // PIO0_1 Wakeup | |
WAKEUP_IRQHandler, // PIO0_2 Wakeup | |
WAKEUP_IRQHandler, // PIO0_3 Wakeup | |
WAKEUP_IRQHandler, // PIO0_4 Wakeup | |
WAKEUP_IRQHandler, // PIO0_5 Wakeup | |
WAKEUP_IRQHandler, // PIO0_6 Wakeup | |
WAKEUP_IRQHandler, // PIO0_7 Wakeup | |
WAKEUP_IRQHandler, // PIO0_8 Wakeup | |
WAKEUP_IRQHandler, // PIO0_9 Wakeup | |
WAKEUP_IRQHandler, // PIO0_10 Wakeup | |
WAKEUP_IRQHandler, // PIO0_11 Wakeup | |
WAKEUP_IRQHandler, // PIO1_0 Wakeup | |
CAN_IRQHandler, // C_CAN Interrupt | |
SSP1_IRQHandler, // SPI/SSP1 Interrupt | |
I2C_IRQHandler, // I2C0 | |
TIMER16_0_IRQHandler, // CT16B0 (16-bit Timer 0) | |
TIMER16_1_IRQHandler, // CT16B1 (16-bit Timer 1) | |
TIMER32_0_IRQHandler, // CT32B0 (32-bit Timer 0) | |
TIMER32_1_IRQHandler, // CT32B1 (32-bit Timer 1) | |
SSP0_IRQHandler, // SPI/SSP0 Interrupt | |
UART_IRQHandler, // UART0 | |
0, // Reserved | |
0, // Reserved | |
ADC_IRQHandler, // ADC (A/D Converter) | |
WDT_IRQHandler, // WDT (Watchdog Timer) | |
BOD_IRQHandler, // BOD (Brownout Detect) | |
0, // Reserved | |
PIOINT3_IRQHandler, // PIO INT3 | |
PIOINT2_IRQHandler, // PIO INT2 | |
PIOINT1_IRQHandler, // PIO INT1 | |
PIOINT0_IRQHandler, // PIO INT0 | |
}; | |
//***************************************************************************** | |
// 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; | |
} | |
#ifndef USE_OLD_STYLE_DATA_BSS_INIT | |
//***************************************************************************** | |
// 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; | |
#else | |
//***************************************************************************** | |
// The following symbols are constructs generated by the linker, indicating | |
// the load address, execution address and length of the RW data section and | |
// the execution and length of the BSS (zero initialized) section. | |
// Note that these symbols are not normally used by the managed linker script | |
// mechanism in Red Suite/LPCXpresso 3.6 (Windows) and LPCXpresso 3.8 (Linux). | |
// They are provide here simply so this startup code can be used with earlier | |
// versions of Red Suite which do not support the more advanced managed linker | |
// script mechanism introduced in the above version. To enable their use, | |
// define "USE_OLD_STYLE_DATA_BSS_INIT". | |
//***************************************************************************** | |
extern unsigned int _etext; | |
extern unsigned int _data; | |
extern unsigned int _edata; | |
extern unsigned int _bss; | |
extern unsigned int _ebss; | |
#endif | |
//***************************************************************************** | |
// 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) { | |
#ifndef USE_OLD_STYLE_DATA_BSS_INIT | |
// | |
// 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); | |
} | |
#else | |
// Use Old Style Data and BSS section initialization. | |
// This will only initialize a single RAM bank. | |
unsigned int * LoadAddr, *ExeAddr, *EndAddr, SectionLen; | |
// Copy the data segment from flash to SRAM. | |
LoadAddr = &_etext; | |
ExeAddr = &_data; | |
EndAddr = &_edata; | |
SectionLen = (void*)EndAddr - (void*)ExeAddr; | |
data_init((unsigned int)LoadAddr, (unsigned int)ExeAddr, SectionLen); | |
// Zero fill the bss segment | |
ExeAddr = &_bss; | |
EndAddr = &_ebss; | |
SectionLen = (void*)EndAddr - (void*)ExeAddr; | |
bss_init ((unsigned int)ExeAddr, SectionLen); | |
#endif | |
#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) | |
{ | |
} | |
} | |
void pop_registers_from_fault_stack(unsigned int * hardfault_args) | |
{ | |
volatile unsigned int stacked_r0; | |
volatile unsigned int stacked_r1; | |
volatile unsigned int stacked_r2; | |
volatile unsigned int stacked_r3; | |
volatile unsigned int stacked_r12; | |
volatile unsigned int stacked_lr; | |
volatile unsigned int stacked_pc; | |
volatile unsigned int stacked_psr; | |
stacked_r0 = ((unsigned long) hardfault_args[0]); | |
stacked_r1 = ((unsigned long) hardfault_args[1]); | |
stacked_r2 = ((unsigned long) hardfault_args[2]); | |
stacked_r3 = ((unsigned long) hardfault_args[3]); | |
stacked_r12 = ((unsigned long) hardfault_args[4]); | |
stacked_lr = ((unsigned long) hardfault_args[5]); | |
stacked_pc = ((unsigned long) hardfault_args[6]); | |
stacked_psr = ((unsigned long) hardfault_args[7]); | |
/* Inspect stacked_pc to locate the offending instruction. */ | |
for( ;; ) | |
{ | |
__asm volatile ( "NOP" ); | |
} | |
} | |
__attribute__ ((section(".after_vectors"))) | |
void HardFault_Handler(void) | |
{ | |
__asm volatile | |
( | |
" mov r0, lr \n" | |
" mov r1, #4 \n" | |
" and r1, r0 \n" | |
" cmp r1, #0 \n" | |
" beq is_equal \n" | |
" mrs r0, psp \n" | |
" b is_done \n" | |
"is_equal: \n" | |
" mrs r0, msp \n" | |
"is_done: \n" | |
" ldr r1, [r0, #24] \n" | |
" ldr r2, handler2_address_const \n" | |
" bx r2 \n" | |
" handler2_address_const: .word pop_registers_from_fault_stack \n" | |
); | |
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) | |
{ | |
} | |
} | |