//***************************************************************************** | |
// +--+ | |
// | ++----+ | |
// +-++ | | |
// | | | |
// +-+--+ | | |
// | +--+--+ | |
// +----+ Copyright (c) 2009 Code Red Technologies Ltd. | |
// | |
// Microcontroller Startup code for use with Red Suite | |
// | |
// 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. | |
// | |
//***************************************************************************** | |
#define WEAK __attribute__ ((weak)) | |
#define ALIAS(f) __attribute__ ((weak, alias (#f))) | |
//***************************************************************************** | |
// | |
// Forward declaration of the default handlers. | |
// | |
//***************************************************************************** | |
void Reset_Handler(void); | |
void ResetISR(void) ALIAS(Reset_Handler); | |
static void NMI_Handler(void); | |
static void HardFault_Handler(void); | |
static void MemManage_Handler(void) __attribute__((naked)); | |
static void BusFault_Handler(void) __attribute__((naked)); | |
static void UsageFault_Handler(void) __attribute__((naked)); | |
static void DebugMon_Handler(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 WDT_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void TIMER0_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void TIMER1_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void TIMER2_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void TIMER3_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void UART0_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void UART1_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void UART2_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void UART3_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void PWM1_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void I2C0_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void I2C1_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void I2C2_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void SPI_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void SSP0_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void SSP1_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void PLL0_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void RTC_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void EINT0_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void EINT1_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void EINT2_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void EINT3_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void ADC_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void BOD_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void USB_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void CAN_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void DMA_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void I2S_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void ENET_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void RIT_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void MCPWM_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void QEI_IRQHandler(void) ALIAS(IntDefaultHandler); | |
void PLL1_IRQHandler(void) ALIAS(IntDefaultHandler); | |
extern void xPortSysTickHandler(void); | |
extern void xPortPendSVHandler(void); | |
extern void vPortSVCHandler( void ); | |
//***************************************************************************** | |
// | |
// The entry point for the C++ library startup | |
// | |
//***************************************************************************** | |
extern WEAK void __libc_init_array(void); | |
//***************************************************************************** | |
// | |
// The entry point for the application. | |
// __main() is the entry point for redlib based applications | |
// main() is the entry point for newlib based applications | |
// | |
//***************************************************************************** | |
extern WEAK void __main(void); | |
extern WEAK void main(void); | |
//***************************************************************************** | |
// | |
// External declaration for the pointer to the stack top from the Linker Script | |
// | |
//***************************************************************************** | |
extern void _vStackTop; | |
//***************************************************************************** | |
// | |
// The vector table. | |
// This relies on the linker script to place at correct location in memory. | |
// | |
//***************************************************************************** | |
__attribute__ ((section(".isr_vector"))) | |
void (* const g_pfnVectors[])(void) = | |
{ | |
// Core Level - CM3 | |
(void *)&_vStackTop, // The initial stack pointer | |
Reset_Handler, // 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 | |
vPortSVCHandler, // SVCall handler | |
DebugMon_Handler, // Debug monitor handler | |
0, // Reserved | |
xPortPendSVHandler, // The PendSV handler | |
xPortSysTickHandler, // The SysTick handler | |
// Chip Level - LPC17 | |
WDT_IRQHandler, // 16, 0x40 - WDT | |
TIMER0_IRQHandler, // 17, 0x44 - TIMER0 | |
TIMER1_IRQHandler, // 18, 0x48 - TIMER1 | |
TIMER2_IRQHandler, // 19, 0x4c - TIMER2 | |
TIMER3_IRQHandler, // 20, 0x50 - TIMER3 | |
UART0_IRQHandler, // 21, 0x54 - UART0 | |
UART1_IRQHandler, // 22, 0x58 - UART1 | |
UART2_IRQHandler, // 23, 0x5c - UART2 | |
UART3_IRQHandler, // 24, 0x60 - UART3 | |
PWM1_IRQHandler, // 25, 0x64 - PWM1 | |
I2C0_IRQHandler, // 26, 0x68 - I2C0 | |
I2C1_IRQHandler, // 27, 0x6c - I2C1 | |
I2C2_IRQHandler, // 28, 0x70 - I2C2 | |
SPI_IRQHandler, // 29, 0x74 - SPI | |
SSP0_IRQHandler, // 30, 0x78 - SSP0 | |
SSP1_IRQHandler, // 31, 0x7c - SSP1 | |
PLL0_IRQHandler, // 32, 0x80 - PLL0 (Main PLL) | |
RTC_IRQHandler, // 33, 0x84 - RTC | |
EINT0_IRQHandler, // 34, 0x88 - EINT0 | |
EINT1_IRQHandler, // 35, 0x8c - EINT1 | |
EINT2_IRQHandler, // 36, 0x90 - EINT2 | |
EINT3_IRQHandler, // 37, 0x94 - EINT3 | |
ADC_IRQHandler, // 38, 0x98 - ADC | |
BOD_IRQHandler, // 39, 0x9c - BOD | |
USB_IRQHandler, // 40, 0xA0 - USB | |
CAN_IRQHandler, // 41, 0xa4 - CAN | |
DMA_IRQHandler, // 42, 0xa8 - GP DMA | |
I2S_IRQHandler, // 43, 0xac - I2S | |
ENET_IRQHandler, // Ethernet. | |
RIT_IRQHandler, // 45, 0xb4 - RITINT | |
MCPWM_IRQHandler, // 46, 0xb8 - Motor Control PWM | |
QEI_IRQHandler, // 47, 0xbc - Quadrature Encoder | |
PLL1_IRQHandler, // 48, 0xc0 - PLL1 (USB PLL) | |
}; | |
//***************************************************************************** | |
// | |
// The following are constructs created by the linker, indicating where the | |
// the "data" and "bss" segments reside in memory. The initializers for the | |
// for 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; | |
extern unsigned long __privileged_data_start__; | |
extern unsigned long __privileged_data_end__; | |
//***************************************************************************** | |
// Reset entry point for your code. | |
// Sets up a simple runtime environment and initializes the C/C++ | |
// library. | |
// | |
//***************************************************************************** | |
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++; | |
} | |
// | |
// Zero fill the bss segment. This is done with inline assembly since this | |
// will clear the value of pulDest if it is not kept in a register. | |
// | |
__asm(" ldr r0, =_bss\n" | |
" ldr r1, =_ebss\n" | |
" mov r2, #0\n" | |
" .thumb_func\n" | |
"zero_loop_bss:\n" | |
" cmp r0, r1\n" | |
" it lt\n" | |
" strlt r2, [r0], #4\n" | |
" blt zero_loop_bss"); | |
// | |
// Call C++ library initilisation, if present | |
// | |
if (__libc_init_array) | |
__libc_init_array() ; | |
// | |
// Call the application's entry point. | |
// __main() is the entry point for redlib based applications (which calls main()) | |
// main() is the entry point for newlib based applications | |
// | |
if (__main) | |
__main() ; | |
else | |
main() ; | |
// | |
// main() shouldn't return, but if it does, we'll just enter an infinite loop | |
// | |
while (1) { | |
; | |
} | |
} | |
//***************************************************************************** | |
// | |
// This is the code that gets called when the processor receives a NMI. This | |
// simply enters an infinite loop, preserving the system state for examination | |
// by a debugger. | |
// | |
//***************************************************************************** | |
static void NMI_Handler(void) | |
{ | |
while(1) | |
{ | |
} | |
} | |
static void HardFault_Handler(void) | |
{ | |
for( ;; ); | |
} | |
void pop_registers_from_fault_stack(unsigned int * hardfault_args) | |
{ | |
unsigned int stacked_r0; | |
unsigned int stacked_r1; | |
unsigned int stacked_r2; | |
unsigned int stacked_r3; | |
unsigned int stacked_r12; | |
unsigned int stacked_lr; | |
unsigned int stacked_pc; | |
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( ;; ); | |
} | |
static void MemManage_Handler(void) | |
{ | |
__asm volatile | |
( | |
" tst lr, #4 \n" | |
" ite eq \n" | |
" mrseq r0, msp \n" | |
" mrsne r0, psp \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" | |
); | |
} | |
static void BusFault_Handler(void) | |
{ | |
__asm volatile | |
( | |
" tst lr, #4 \n" | |
" ite eq \n" | |
" mrseq r0, msp \n" | |
" mrsne r0, psp \n" | |
" ldr r1, [r0, #24] \n" | |
" ldr r2, handler3_address_const \n" | |
" bx r2 \n" | |
" handler3_address_const: .word pop_registers_from_fault_stack \n" | |
); | |
} | |
static void UsageFault_Handler(void) | |
{ | |
__asm volatile | |
( | |
" tst lr, #4 \n" | |
" ite eq \n" | |
" mrseq r0, msp \n" | |
" mrsne r0, psp \n" | |
" ldr r1, [r0, #24] \n" | |
" ldr r2, handler4_address_const \n" | |
" bx r2 \n" | |
" handler4_address_const: .word pop_registers_from_fault_stack \n" | |
); | |
} | |
static void DebugMon_Handler(void) | |
{ | |
while(1) | |
{ | |
} | |
} | |
//***************************************************************************** | |
// | |
// Processor ends up here if an unexpected interrupt occurs or a handler | |
// is not present in the application code. | |
// | |
//***************************************************************************** | |
static void IntDefaultHandler(void) | |
{ | |
// | |
// Go into an infinite loop. | |
// | |
while(1) | |
{ | |
} | |
} |