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353 lines
15 KiB
C
353 lines
15 KiB
C
//*****************************************************************************
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// LPC11U6x Microcontroller Startup code for use with LPCXpresso IDE
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//
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// Version : 140113
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//*****************************************************************************
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//
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// Copyright(C) NXP Semiconductors, 2014
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// All rights reserved.
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//
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// Software that is described herein is for illustrative purposes only
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// which provides customers with programming information regarding the
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// LPC products. This software is supplied "AS IS" without any warranties of
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// any kind, and NXP Semiconductors and its licensor disclaim any and
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// all warranties, express or implied, including all implied warranties of
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// merchantability, fitness for a particular purpose and non-infringement of
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// intellectual property rights. NXP Semiconductors assumes no responsibility
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// or liability for the use of the software, conveys no license or rights under any
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// patent, copyright, mask work right, or any other intellectual property rights in
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// or to any products. NXP Semiconductors reserves the right to make changes
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// in the software without notification. NXP Semiconductors also makes no
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// representation or warranty that such application will be suitable for the
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// specified use without further testing or modification.
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//
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// Permission to use, copy, modify, and distribute this software and its
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// documentation is hereby granted, under NXP Semiconductors' and its
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// licensor's relevant copyrights in the software, without fee, provided that it
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// is used in conjunction with NXP Semiconductors microcontrollers. This
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// copyright, permission, and disclaimer notice must appear in all copies of
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// this code.
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//*****************************************************************************
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#if defined (__cplusplus)
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#ifdef __REDLIB__
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#error Redlib does not support C++
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#else
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//*****************************************************************************
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//
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// The entry point for the C++ library startup
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//
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//*****************************************************************************
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extern "C" {
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extern void __libc_init_array(void);
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}
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#endif
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#endif
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#define WEAK __attribute__ ((weak))
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#define ALIAS(f) __attribute__ ((weak, alias (#f)))
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//*****************************************************************************
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#if defined (__cplusplus)
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extern "C" {
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#endif
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//*****************************************************************************
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#if defined (__USE_CMSIS) || defined (__USE_LPCOPEN)
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// Declaration of external SystemInit function
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extern void SystemInit(void);
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#endif
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// Patch the AEABI integer divide functions to use MCU's romdivide library
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#ifdef __USE_ROMDIVIDE
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// Location in memory that holds the address of the ROM Driver table
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#define PTR_ROM_DRIVER_TABLE ((unsigned int *)(0x1FFF1FF8))
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// Variables to store addresses of idiv and udiv functions within MCU ROM
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unsigned int *pDivRom_idiv;
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unsigned int *pDivRom_uidiv;
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#endif
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//*****************************************************************************
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//
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// Forward declaration of the default handlers. These are aliased.
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// When the application defines a handler (with the same name), this will
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// automatically take precedence over these weak definitions
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//
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//*****************************************************************************
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void ResetISR(void);
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WEAK void NMI_Handler(void);
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WEAK void HardFault_Handler(void);
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WEAK void SVC_Handler(void);
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WEAK void PendSV_Handler(void);
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WEAK void SysTick_Handler(void);
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WEAK void IntDefaultHandler(void);
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//*****************************************************************************
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//
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// Forward declaration of the specific IRQ handlers. These are aliased
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// to the IntDefaultHandler, which is a 'forever' loop. When the application
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// defines a handler (with the same name), this will automatically take
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// precedence over these weak definitions
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//
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//*****************************************************************************
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void PIN_INT0_IRQHandler (void) ALIAS(IntDefaultHandler);
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void PIN_INT1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void PIN_INT2_IRQHandler (void) ALIAS(IntDefaultHandler);
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void PIN_INT3_IRQHandler (void) ALIAS(IntDefaultHandler);
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void PIN_INT4_IRQHandler (void) ALIAS(IntDefaultHandler);
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void PIN_INT5_IRQHandler (void) ALIAS(IntDefaultHandler);
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void PIN_INT6_IRQHandler (void) ALIAS(IntDefaultHandler);
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void PIN_INT7_IRQHandler (void) ALIAS(IntDefaultHandler);
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void GINT0_IRQHandler (void) ALIAS(IntDefaultHandler);
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void GINT1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void I2C1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void USART1_4_IRQHandler (void) ALIAS(IntDefaultHandler);
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void USART2_3_IRQHandler (void) ALIAS(IntDefaultHandler);
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void SCT0_1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void SSP1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void I2C0_IRQHandler (void) ALIAS(IntDefaultHandler);
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void TIMER16_0_IRQHandler (void) ALIAS(IntDefaultHandler);
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void TIMER16_1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void TIMER32_0_IRQHandler (void) ALIAS(IntDefaultHandler);
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void TIMER32_1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void SSP0_IRQHandler (void) ALIAS(IntDefaultHandler);
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void USART0_IRQHandler (void) ALIAS(IntDefaultHandler);
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void USB_IRQHandler (void) ALIAS(IntDefaultHandler);
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void USB_FIQHandler (void) ALIAS(IntDefaultHandler);
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void ADCA_IRQHandler (void) ALIAS(IntDefaultHandler);
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void RTC_IRQHandler (void) ALIAS(IntDefaultHandler);
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void BOD_WDT_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FMC_IRQHandler (void) ALIAS(IntDefaultHandler);
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void DMA_IRQHandler (void) ALIAS(IntDefaultHandler);
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void ADCB_IRQHandler (void) ALIAS(IntDefaultHandler);
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void USBWakeup_IRQHandler (void) ALIAS(IntDefaultHandler);
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//*****************************************************************************
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// The entry point for the application.
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// __main() is the entry point for redlib based applications
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// main() is the entry point for newlib based applications
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//*****************************************************************************
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#if defined (__REDLIB__)
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extern void __main(void);
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#endif
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extern int main(void);
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//*****************************************************************************
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//
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// External declaration for the pointer to the stack top from the Linker Script
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//
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//*****************************************************************************
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extern void _vStackTop(void);
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//*****************************************************************************
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#if defined (__cplusplus)
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} // extern "C"
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#endif
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//*****************************************************************************
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//
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// The vector table. Note that the proper constructs must be placed on this to
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// ensure that it ends up at physical address 0x0000.0000.
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//
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//*****************************************************************************
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extern void (* const g_pfnVectors[])(void);
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__attribute__ ((section(".isr_vector"))) __attribute__ ((used))
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void (* const g_pfnVectors[])(void) = {
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&_vStackTop, // The initial stack pointer
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ResetISR, // The reset handler
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NMI_Handler, // The NMI handler
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HardFault_Handler, // The hard fault handler
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0, // Reserved
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0, // Reserved
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0, // Reserved
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0, // Reserved
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0, // Reserved
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0, // Reserved
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0, // Reserved
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SVC_Handler, // SVCall handler
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0, // Reserved
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0, // Reserved
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PendSV_Handler, // The PendSV handler
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SysTick_Handler, // The SysTick handler
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// LPC11U6x specific handlers
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PIN_INT0_IRQHandler, // 0 - GPIO pin interrupt 0
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PIN_INT1_IRQHandler, // 1 - GPIO pin interrupt 1
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PIN_INT2_IRQHandler, // 2 - GPIO pin interrupt 2
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PIN_INT3_IRQHandler, // 3 - GPIO pin interrupt 3
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PIN_INT4_IRQHandler, // 4 - GPIO pin interrupt 4
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PIN_INT5_IRQHandler, // 5 - GPIO pin interrupt 5
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PIN_INT6_IRQHandler, // 6 - GPIO pin interrupt 6
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PIN_INT7_IRQHandler, // 7 - GPIO pin interrupt 7
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GINT0_IRQHandler, // 8 - GPIO GROUP0 interrupt
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GINT1_IRQHandler, // 9 - GPIO GROUP1 interrupt
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I2C1_IRQHandler, // 10 - I2C1
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USART1_4_IRQHandler, // 11 - combined USART1 & 4 interrupt
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USART2_3_IRQHandler, // 12 - combined USART2 & 3 interrupt
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SCT0_1_IRQHandler, // 13 - combined SCT0 and 1 interrupt
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SSP1_IRQHandler, // 14 - SPI/SSP1 Interrupt
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I2C0_IRQHandler, // 15 - I2C0
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TIMER16_0_IRQHandler, // 16 - CT16B0 (16-bit Timer 0)
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TIMER16_1_IRQHandler, // 17 - CT16B1 (16-bit Timer 1)
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TIMER32_0_IRQHandler, // 18 - CT32B0 (32-bit Timer 0)
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TIMER32_1_IRQHandler, // 19 - CT32B1 (32-bit Timer 1)
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SSP0_IRQHandler, // 20 - SPI/SSP0 Interrupt
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USART0_IRQHandler, // 21 - USART0
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USB_IRQHandler, // 22 - USB IRQ
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USB_FIQHandler, // 23 - USB FIQ
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ADCA_IRQHandler, // 24 - ADC A(A/D Converter)
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RTC_IRQHandler, // 25 - Real Time CLock interrpt
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BOD_WDT_IRQHandler, // 25 - Combined Brownout/Watchdog interrupt
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FMC_IRQHandler, // 27 - IP2111 Flash Memory Controller
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DMA_IRQHandler, // 28 - DMA interrupt
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ADCB_IRQHandler, // 24 - ADC B (A/D Converter)
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USBWakeup_IRQHandler, // 30 - USB wake-up interrupt
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0, // 31 - Reserved
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};
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//*****************************************************************************
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// Functions to carry out the initialization of RW and BSS data sections. These
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// are written as separate functions rather than being inlined within the
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// ResetISR() function in order to cope with MCUs with multiple banks of
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// memory.
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//*****************************************************************************
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__attribute__ ((section(".after_vectors")))
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void data_init(unsigned int romstart, unsigned int start, unsigned int len) {
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unsigned int *pulDest = (unsigned int*) start;
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unsigned int *pulSrc = (unsigned int*) romstart;
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unsigned int loop;
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for (loop = 0; loop < len; loop = loop + 4)
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*pulDest++ = *pulSrc++;
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}
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__attribute__ ((section(".after_vectors")))
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void bss_init(unsigned int start, unsigned int len) {
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unsigned int *pulDest = (unsigned int*) start;
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unsigned int loop;
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for (loop = 0; loop < len; loop = loop + 4)
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*pulDest++ = 0;
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}
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//*****************************************************************************
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// The following symbols are constructs generated by the linker, indicating
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// the location of various points in the "Global Section Table". This table is
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// created by the linker via the Code Red managed linker script mechanism. It
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// contains the load address, execution address and length of each RW data
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// section and the execution and length of each BSS (zero initialized) section.
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//*****************************************************************************
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extern unsigned int __data_section_table;
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extern unsigned int __data_section_table_end;
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extern unsigned int __bss_section_table;
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extern unsigned int __bss_section_table_end;
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//*****************************************************************************
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// Reset entry point for your code.
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// Sets up a simple runtime environment and initializes the C/C++
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// library.
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//*****************************************************************************
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__attribute__ ((section(".after_vectors")))
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void
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ResetISR(void) {
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// Optionally enable RAM banks that may be off by default at reset
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#if !defined (DONT_ENABLE_DISABLED_RAMBANKS)
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volatile unsigned int *SYSCON_SYSAHBCLKCTRL = (unsigned int *) 0x40048080;
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// Ensure that RAM1(26) and USBSRAM(27) bits in SYSAHBCLKCTRL are set
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*SYSCON_SYSAHBCLKCTRL |= (1 << 26) | (1 <<27);
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#endif
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//
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// Copy the data sections from flash to SRAM.
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//
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unsigned int LoadAddr, ExeAddr, SectionLen;
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unsigned int *SectionTableAddr;
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// Load base address of Global Section Table
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SectionTableAddr = &__data_section_table;
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// Copy the data sections from flash to SRAM.
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while (SectionTableAddr < &__data_section_table_end) {
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LoadAddr = *SectionTableAddr++;
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ExeAddr = *SectionTableAddr++;
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SectionLen = *SectionTableAddr++;
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data_init(LoadAddr, ExeAddr, SectionLen);
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}
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// At this point, SectionTableAddr = &__bss_section_table;
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// Zero fill the bss segment
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while (SectionTableAddr < &__bss_section_table_end) {
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ExeAddr = *SectionTableAddr++;
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SectionLen = *SectionTableAddr++;
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bss_init(ExeAddr, SectionLen);
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}
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// Patch the AEABI integer divide functions to use MCU's romdivide library
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#ifdef __USE_ROMDIVIDE
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// Get address of Integer division routines function table in ROM
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unsigned int *div_ptr = (unsigned int *)((unsigned int *)*(PTR_ROM_DRIVER_TABLE))[4];
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// Get addresses of integer divide routines in ROM
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// These address are then used by the code in aeabi_romdiv_patch.s
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pDivRom_idiv = (unsigned int *)div_ptr[0];
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pDivRom_uidiv = (unsigned int *)div_ptr[1];
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#endif
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#if defined (__USE_CMSIS) || defined (__USE_LPCOPEN)
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SystemInit();
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#endif
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#if defined (__cplusplus)
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//
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// Call C++ library initialisation
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//
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__libc_init_array();
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#endif
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#if defined (__REDLIB__)
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// Call the Redlib library, which in turn calls main()
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__main() ;
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#else
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main();
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#endif
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//
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// main() shouldn't return, but if it does, we'll just enter an infinite loop
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//
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while (1) {
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;
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}
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}
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//*****************************************************************************
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// Default exception handlers. Override the ones here by defining your own
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// handler routines in your application code.
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//*****************************************************************************
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__attribute__ ((section(".after_vectors")))
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void NMI_Handler(void)
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{ while(1) { }
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}
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__attribute__ ((section(".after_vectors")))
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void HardFault_Handler(void)
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{ while(1) { }
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}
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__attribute__ ((section(".after_vectors")))
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void SVC_Handler(void)
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{ while(1) { }
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}
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__attribute__ ((section(".after_vectors")))
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void PendSV_Handler(void)
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{ while(1) { }
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}
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__attribute__ ((section(".after_vectors")))
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void SysTick_Handler(void)
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{ while(1) { }
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}
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//*****************************************************************************
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//
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// Processor ends up here if an unexpected interrupt occurs or a specific
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// handler is not present in the application code.
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//
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//*****************************************************************************
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__attribute__ ((section(".after_vectors")))
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void IntDefaultHandler(void)
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{ while(1) { }
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}
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