//***************************************************************************** // LPC84x Microcontroller Startup code for use with MCUXpresso IDE // // Version : 170111 //***************************************************************************** // // Copyright(C) NXP Semiconductors, 2017 // 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 *)(0x0F001FF8)) // 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 SPI0_IRQHandler(void) ALIAS(IntDefaultHandler); void DAC0_IRQHandler(void) ALIAS(IntDefaultHandler); void UART0_IRQHandler(void) ALIAS(IntDefaultHandler); void UART1_IRQHandler(void) ALIAS(IntDefaultHandler); void I2C1_IRQHandler(void) ALIAS(IntDefaultHandler); void I2C0_IRQHandler(void) ALIAS(IntDefaultHandler); void MRT_IRQHandler(void) ALIAS(IntDefaultHandler); void CMP_IRQHandler(void) ALIAS(IntDefaultHandler); void WDT_IRQHandler(void) ALIAS(IntDefaultHandler); void BOD_IRQHandler(void) ALIAS(IntDefaultHandler); void FLASH_IRQHandler(void) ALIAS(IntDefaultHandler); void WKT_IRQHandler(void) ALIAS(IntDefaultHandler); void ADC_SEQA_IRQHandler(void) ALIAS(IntDefaultHandler); void ADC_SEQB_IRQHandler(void) ALIAS(IntDefaultHandler); void ADC_THCMP_IRQHandler(void) ALIAS(IntDefaultHandler); void ADC_OVR_IRQHandler(void) ALIAS(IntDefaultHandler); void CTIMER0_IRQHandler(void) ALIAS(IntDefaultHandler); void PININT0_IRQHandler(void) ALIAS(IntDefaultHandler); void PININT1_IRQHandler(void) ALIAS(IntDefaultHandler); void PININT2_IRQHandler(void) ALIAS(IntDefaultHandler); void PININT3_IRQHandler(void) ALIAS(IntDefaultHandler); void PININT4_IRQHandler(void) ALIAS(IntDefaultHandler); void PININT5_IRQHandler(void) ALIAS(IntDefaultHandler); void PININT6_IRQHandler(void) ALIAS(IntDefaultHandler); void PININT7_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); #else extern int main(void); #endif //***************************************************************************** // // External declaration for the pointer to the stack top from the Linker Script // //***************************************************************************** extern void _vStackTop(void); //***************************************************************************** // // External declaration for LPC MCU vector table checksum from Linker Script // //***************************************************************************** WEAK extern void __valid_user_code_checksum(); //***************************************************************************** #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__ ((used,section(".isr_vector"))) void (* const g_pfnVectors[])(void) = { // Core Level - CM0plus &_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 __valid_user_code_checksum, // LPC MCU Checksum 0, // Reserved 0, // Reserved 0, // Reserved SVC_Handler, // SVCall handler 0, // Reserved 0, // Reserved PendSV_Handler, // The PendSV handler SysTick_Handler, // The SysTick handler // Chip Level - LPC80x SPI0_IRQHandler, // 0 - SPI0 0, // 1 - Reserved DAC0_IRQHandler, // 2 - DAC0 UART0_IRQHandler, // 3 - UART0 UART1_IRQHandler, // 4 - UART1 0, // 5 - Reserved 0, // 6 - Reserved I2C1_IRQHandler, // 7 - I2C1 I2C0_IRQHandler, // 8 - I2C0 0, // 9 - Reserved MRT_IRQHandler, // 10 - Multi-rate timer CMP_IRQHandler, // 11 - Analog comparator / Cap Touch WDT_IRQHandler, // 12 - Windowed watchdog timer BOD_IRQHandler, // 13 - BOD FLASH_IRQHandler, // 14 - FLASH WKT_IRQHandler, // 15 - Self wake-up timer ADC_SEQA_IRQHandler, // 16 - ADC seq A ADC_SEQB_IRQHandler, // 17 - ADC_seq B ADC_THCMP_IRQHandler, // 18 - ADC threshold compare ADC_OVR_IRQHandler, // 19 - ADC overrun 0, // 20 - Reserved 0, // 21 - Reserved 0, // 22 - Reserved CTIMER0_IRQHandler, // 23 - Timer 0 PININT0_IRQHandler, // 24 - PININT0 PININT1_IRQHandler, // 25 - PININT1 PININT2_IRQHandler, // 26 - PININT2 PININT3_IRQHandler, // 27 - PININT3 PININT4_IRQHandler, // 28 - PININT4 PININT5_IRQHandler, // 29 - PININT5 PININT6_IRQHandler, // 30 - PININT6 PININT7_IRQHandler // 31 - PININT7 }; /* End of g_pfnVectors */ //***************************************************************************** // 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) { // // 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) {} }