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espressif_tinyusb/hw/bsp/lpcxpresso11u68/cr_startup_lpc11u6x.c

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//*****************************************************************************
// LPC11U6x Microcontroller Startup code for use with LPCXpresso IDE
//
// Version : 140113
//*****************************************************************************
//
// Copyright(C) NXP Semiconductors, 2014
// All rights reserved.
//
// Software that is described herein is for illustrative purposes only
// which provides customers with programming information regarding the
// LPC products. This software is supplied "AS IS" without any warranties of
// any kind, and NXP Semiconductors and its licensor disclaim any and
// all warranties, express or implied, including all implied warranties of
// merchantability, fitness for a particular purpose and non-infringement of
// intellectual property rights. NXP Semiconductors assumes no responsibility
// or liability for the use of the software, conveys no license or rights under any
// patent, copyright, mask work right, or any other intellectual property rights in
// or to any products. NXP Semiconductors reserves the right to make changes
// in the software without notification. NXP Semiconductors also makes no
// representation or warranty that such application will be suitable for the
// specified use without further testing or modification.
//
// Permission to use, copy, modify, and distribute this software and its
// documentation is hereby granted, under NXP Semiconductors' and its
// licensor's relevant copyrights in the software, without fee, provided that it
// is used in conjunction with NXP Semiconductors microcontrollers. This
// copyright, permission, and disclaimer notice must appear in all copies of
// this code.
//*****************************************************************************
#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 (__cplusplus)
extern "C" {
#endif
//*****************************************************************************
#if defined (__USE_CMSIS) || defined (__USE_LPCOPEN)
// Declaration of external SystemInit function
extern void SystemInit(void);
#endif
// Patch the AEABI integer divide functions to use MCU's romdivide library
#ifdef __USE_ROMDIVIDE
// Location in memory that holds the address of the ROM Driver table
#define PTR_ROM_DRIVER_TABLE ((unsigned int *)(0x1FFF1FF8))
// Variables to store addresses of idiv and udiv functions within MCU ROM
unsigned int *pDivRom_idiv;
unsigned int *pDivRom_uidiv;
#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 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 I2C1_IRQHandler (void) ALIAS(IntDefaultHandler);
void USART1_4_IRQHandler (void) ALIAS(IntDefaultHandler);
void USART2_3_IRQHandler (void) ALIAS(IntDefaultHandler);
void SCT0_1_IRQHandler (void) ALIAS(IntDefaultHandler);
void SSP1_IRQHandler (void) ALIAS(IntDefaultHandler);
void I2C0_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 USART0_IRQHandler (void) ALIAS(IntDefaultHandler);
void USB_IRQHandler (void) ALIAS(IntDefaultHandler);
void USB_FIQHandler (void) ALIAS(IntDefaultHandler);
void ADCA_IRQHandler (void) ALIAS(IntDefaultHandler);
void RTC_IRQHandler (void) ALIAS(IntDefaultHandler);
void BOD_WDT_IRQHandler (void) ALIAS(IntDefaultHandler);
void FMC_IRQHandler (void) ALIAS(IntDefaultHandler);
void DMA_IRQHandler (void) ALIAS(IntDefaultHandler);
void ADCB_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"))) __attribute__ ((used))
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
SVC_Handler, // SVCall handler
0, // Reserved
0, // Reserved
PendSV_Handler, // The PendSV handler
SysTick_Handler, // The SysTick handler
// LPC11U6x specific handlers
PIN_INT0_IRQHandler, // 0 - GPIO pin interrupt 0
PIN_INT1_IRQHandler, // 1 - GPIO pin interrupt 1
PIN_INT2_IRQHandler, // 2 - GPIO pin interrupt 2
PIN_INT3_IRQHandler, // 3 - GPIO pin interrupt 3
PIN_INT4_IRQHandler, // 4 - GPIO pin interrupt 4
PIN_INT5_IRQHandler, // 5 - GPIO pin interrupt 5
PIN_INT6_IRQHandler, // 6 - GPIO pin interrupt 6
PIN_INT7_IRQHandler, // 7 - GPIO pin interrupt 7
GINT0_IRQHandler, // 8 - GPIO GROUP0 interrupt
GINT1_IRQHandler, // 9 - GPIO GROUP1 interrupt
I2C1_IRQHandler, // 10 - I2C1
USART1_4_IRQHandler, // 11 - combined USART1 & 4 interrupt
USART2_3_IRQHandler, // 12 - combined USART2 & 3 interrupt
SCT0_1_IRQHandler, // 13 - combined SCT0 and 1 interrupt
SSP1_IRQHandler, // 14 - SPI/SSP1 Interrupt
I2C0_IRQHandler, // 15 - I2C0
TIMER16_0_IRQHandler, // 16 - CT16B0 (16-bit Timer 0)
TIMER16_1_IRQHandler, // 17 - CT16B1 (16-bit Timer 1)
TIMER32_0_IRQHandler, // 18 - CT32B0 (32-bit Timer 0)
TIMER32_1_IRQHandler, // 19 - CT32B1 (32-bit Timer 1)
SSP0_IRQHandler, // 20 - SPI/SSP0 Interrupt
USART0_IRQHandler, // 21 - USART0
USB_IRQHandler, // 22 - USB IRQ
USB_FIQHandler, // 23 - USB FIQ
ADCA_IRQHandler, // 24 - ADC A(A/D Converter)
RTC_IRQHandler, // 25 - Real Time CLock interrpt
BOD_WDT_IRQHandler, // 25 - Combined Brownout/Watchdog interrupt
FMC_IRQHandler, // 27 - IP2111 Flash Memory Controller
DMA_IRQHandler, // 28 - DMA interrupt
ADCB_IRQHandler, // 24 - ADC B (A/D Converter)
USBWakeup_IRQHandler, // 30 - USB wake-up interrupt
0, // 31 - Reserved
};
//*****************************************************************************
// 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) {
// Optionally enable RAM banks that may be off by default at reset
#if !defined (DONT_ENABLE_DISABLED_RAMBANKS)
volatile unsigned int *SYSCON_SYSAHBCLKCTRL = (unsigned int *) 0x40048080;
// Ensure that RAM1(26) and USBSRAM(27) bits in SYSAHBCLKCTRL are set
*SYSCON_SYSAHBCLKCTRL |= (1 << 26) | (1 <<27);
#endif
//
// 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);
}
// Patch the AEABI integer divide functions to use MCU's romdivide library
#ifdef __USE_ROMDIVIDE
// Get address of Integer division routines function table in ROM
unsigned int *div_ptr = (unsigned int *)((unsigned int *)*(PTR_ROM_DRIVER_TABLE))[4];
// Get addresses of integer divide routines in ROM
// These address are then used by the code in aeabi_romdiv_patch.s
pDivRom_idiv = (unsigned int *)div_ptr[0];
pDivRom_uidiv = (unsigned int *)div_ptr[1];
#endif
#if defined (__USE_CMSIS) || defined (__USE_LPCOPEN)
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 SVC_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) { }
}
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