//***************************************************************************** // 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) { } }