//***************************************************************************** // LPC18xx Microcontroller Startup code for use with LPCXpresso IDE // // Version : 150706 //***************************************************************************** // // Copyright(C) NXP Semiconductors, 2013-2015 // 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 //***************************************************************************** // // 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 DAC_IRQHandler(void) ALIAS(IntDefaultHandler); void DMA_IRQHandler(void) ALIAS(IntDefaultHandler); void FLASH_EEPROM_IRQHandler(void) ALIAS(IntDefaultHandler); void ETH_IRQHandler(void) ALIAS(IntDefaultHandler); void SDIO_IRQHandler(void) ALIAS(IntDefaultHandler); void LCD_IRQHandler(void) ALIAS(IntDefaultHandler); void USB0_IRQHandler(void) ALIAS(IntDefaultHandler); void USB1_IRQHandler(void) ALIAS(IntDefaultHandler); void SCT_IRQHandler(void) ALIAS(IntDefaultHandler); void RIT_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 MCPWM_IRQHandler(void) ALIAS(IntDefaultHandler); void ADC0_IRQHandler(void) ALIAS(IntDefaultHandler); void I2C0_IRQHandler(void) ALIAS(IntDefaultHandler); void I2C1_IRQHandler(void) ALIAS(IntDefaultHandler); void ADC1_IRQHandler(void) ALIAS(IntDefaultHandler); void SSP0_IRQHandler(void) ALIAS(IntDefaultHandler); void SSP1_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 I2S0_IRQHandler(void) ALIAS(IntDefaultHandler); void I2S1_IRQHandler(void) ALIAS(IntDefaultHandler); void SPIFI_IRQHandler(void) ALIAS(IntDefaultHandler); void SGPIO_IRQHandler(void) ALIAS(IntDefaultHandler); void GPIO0_IRQHandler(void) ALIAS(IntDefaultHandler); void GPIO1_IRQHandler(void) ALIAS(IntDefaultHandler); void GPIO2_IRQHandler(void) ALIAS(IntDefaultHandler); void GPIO3_IRQHandler(void) ALIAS(IntDefaultHandler); void GPIO4_IRQHandler(void) ALIAS(IntDefaultHandler); void GPIO5_IRQHandler(void) ALIAS(IntDefaultHandler); void GPIO6_IRQHandler(void) ALIAS(IntDefaultHandler); void GPIO7_IRQHandler(void) ALIAS(IntDefaultHandler); void GINT0_IRQHandler(void) ALIAS(IntDefaultHandler); void GINT1_IRQHandler(void) ALIAS(IntDefaultHandler); void EVRT_IRQHandler(void) ALIAS(IntDefaultHandler); void CAN1_IRQHandler(void) ALIAS(IntDefaultHandler); void ATIMER_IRQHandler(void) ALIAS(IntDefaultHandler); void RTC_IRQHandler(void) ALIAS(IntDefaultHandler); void WDT_IRQHandler(void) ALIAS(IntDefaultHandler); void CAN0_IRQHandler(void) ALIAS(IntDefaultHandler); void QEI_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); //***************************************************************************** // // External declaration for LPC MCU vector table checksum from Linker Script // //***************************************************************************** WEAK extern void __valid_user_code_checksum(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__ ((used,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 __valid_user_code_checksum, // LPC MCU Checksum 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 - LPC18 DAC_IRQHandler, // 16 0, // 17 DMA_IRQHandler, // 18 0, // 19 FLASH_EEPROM_IRQHandler, // 20 ORed flash Bank A, flash Bank B, EEPROM interrupts ETH_IRQHandler, // 21 SDIO_IRQHandler, // 22 LCD_IRQHandler, // 23 USB0_IRQHandler, // 24 USB1_IRQHandler, // 25 SCT_IRQHandler, // 26 RIT_IRQHandler, // 27 TIMER0_IRQHandler, // 28 TIMER1_IRQHandler, // 29 TIMER2_IRQHandler, // 30 TIMER3_IRQHandler, // 31 MCPWM_IRQHandler, // 32 ADC0_IRQHandler, // 33 I2C0_IRQHandler, // 34 I2C1_IRQHandler, // 35 0, // 36 ADC1_IRQHandler, // 37 SSP0_IRQHandler, // 38 SSP1_IRQHandler, // 39 UART0_IRQHandler, // 40 UART1_IRQHandler, // 41 UART2_IRQHandler, // 42 UART3_IRQHandler, // 43 I2S0_IRQHandler, // 44 I2S1_IRQHandler, // 45 SPIFI_IRQHandler, // 46 SGPIO_IRQHandler, // 47 GPIO0_IRQHandler, // 48 GPIO1_IRQHandler, // 49 GPIO2_IRQHandler, // 50 GPIO3_IRQHandler, // 51 GPIO4_IRQHandler, // 52 GPIO5_IRQHandler, // 53 GPIO6_IRQHandler, // 54 GPIO7_IRQHandler, // 55 GINT0_IRQHandler, // 56 GINT1_IRQHandler, // 57 EVRT_IRQHandler, // 58 CAN1_IRQHandler, // 59 0, // 60 0, // 61 ATIMER_IRQHandler, // 62 RTC_IRQHandler, // 63 0, // 64 WDT_IRQHandler, // 65 0, // 66 CAN0_IRQHandler, // 67 QEI_IRQHandler, // 68 }; //***************************************************************************** // 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. // //***************************************************************************** void ResetISR(void) { // ************************************************************* // The following conditional block of code manually resets as // much of the peripheral set of the LPC18 as possible. This is // done because the LPC18 does not provide a means of triggering // a full system reset under debugger control, which can cause // problems in certain circumstances when debugging. // // You can prevent this code block being included if you require // (for example when creating a final executable which you will // not debug) by setting the define 'DONT_RESET_ON_RESTART'. // #ifndef DONT_RESET_ON_RESTART // Disable interrupts __asm volatile ("cpsid i"); // equivalent to CMSIS '__disable_irq()' function unsigned int *RESET_CONTROL = (unsigned int *) 0x40053100; // LPC_RGU->RESET_CTRL0 @ 0x40053100 // LPC_RGU->RESET_CTRL1 @ 0x40053104 // Note that we do not use the CMSIS register access mechanism, // as there is no guarantee that the project has been configured // to use CMSIS. // Write to LPC_RGU->RESET_CTRL0 *(RESET_CONTROL+0) = 0x10DF0000; // GPIO_RST|AES_RST|ETHERNET_RST|SDIO_RST|DMA_RST| // USB1_RST|USB0_RST|LCD_RST // Write to LPC_RGU->RESET_CTRL1 *(RESET_CONTROL+1) = 0x00DFF7FF; // CAN0_RST|CAN1_RST|I2S_RST|SSP1_RST|SSP0_RST| // I2C1_RST|I2C0_RST|UART3_RST|UART1_RST|UART1_RST|UART0_RST| // DAC_RST|ADC1_RST|ADC0_RST|QEI_RST|MOTOCONPWM_RST|SCT_RST| // RITIMER_RST|TIMER3_RST|TIMER2_RST|TIMER1_RST|TIMER0_RST // Clear all pending interrupts in the NVIC volatile unsigned int *NVIC_ICPR = (unsigned int *) 0xE000E280; unsigned int irqpendloop; for (irqpendloop = 0; irqpendloop < 8; irqpendloop++) { *(NVIC_ICPR+irqpendloop)= 0xFFFFFFFF; } // Reenable interrupts __asm volatile ("cpsie i"); // equivalent to CMSIS '__enable_irq()' function #endif // ifndef DONT_RESET_ON_RESTART // ************************************************************* #if defined (__USE_LPCOPEN) SystemInit(); #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); } // ****************************** // Check to see if we are running the code from a non-zero // address (eg RAM, external flash), in which case we need // to modify the VTOR register to tell the CPU that the // vector table is located at a non-0x0 address. // Note that we do not use the CMSIS register access mechanism, // as there is no guarantee that the project has been configured // to use CMSIS. unsigned int * pSCB_VTOR = (unsigned int *) 0xE000ED08; if ((unsigned int *)g_pfnVectors!=(unsigned int *) 0x00000000) { // CMSIS : SCB->VTOR =
*pSCB_VTOR = (unsigned int)g_pfnVectors; } #if defined (__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) { } }