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cr_startup_lpc176x.c
cr_startup_lpc176x.c 14.87 KiB
//*****************************************************************************
// +--+
// | ++----+
// +-++ |
// | |
// +-+--+ |
// | +--+--+
// +----+ Copyright (c) 2009-12 Code Red Technologies Ltd.
//
// Microcontroller Startup code for use with Red Suite
//
// Version : 120126
//
// 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_LPC17xx.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 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);
void USBActivity_IRQHandler(void) ALIAS(IntDefaultHandler);
void CANActivity_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 - 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
// 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, // 44, 0xb0 - 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)
USBActivity_IRQHandler, // 49, 0xc4 - USB Activity interrupt to wakeup
CANActivity_IRQHandler, // 50, 0xc8 - CAN Activity interrupt to wakeup
};
//*****************************************************************************
// 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)
{
}}
__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 specific
// handler is not present in the application code.
//
//*****************************************************************************
__attribute__ ((section(".after_vectors")))
void IntDefaultHandler(void)
{
while(1)
{
}}