382 lines
14 KiB
C
382 lines
14 KiB
C
//*****************************************************************************
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// +--+
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// | ++----+
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// +-++ |
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// | |
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// +-+--+ |
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// | +--+--+
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// +----+ Copyright (c) 2011 Code Red Technologies Ltd.
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//
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// Microcontroller Startup code for use with Red Suite
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//
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// Version : 110323
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//
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// Software License Agreement
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//
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// The software is owned by Code Red Technologies and/or its suppliers, and is
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// protected under applicable copyright laws. All rights are reserved. Any
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// use in violation of the foregoing restrictions may subject the user to criminal
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// sanctions under applicable laws, as well as to civil liability for the breach
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// of the terms and conditions of this license.
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//
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// THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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// OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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// USE OF THIS SOFTWARE FOR COMMERCIAL DEVELOPMENT AND/OR EDUCATION IS SUBJECT
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// TO A CURRENT END USER LICENSE AGREEMENT (COMMERCIAL OR EDUCATIONAL) WITH
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// CODE RED TECHNOLOGIES LTD.
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//
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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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// Code Red - if CMSIS is being used, then SystemInit() routine
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// will be called by startup code rather than in application's main()
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#if defined (__USE_CMSIS)
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#include "LPC11Uxx.h"
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#endif
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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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// 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 SVCall_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 FLEX_INT0_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FLEX_INT1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FLEX_INT2_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FLEX_INT3_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FLEX_INT4_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FLEX_INT5_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FLEX_INT6_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FLEX_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 SSP1_IRQHandler (void) ALIAS(IntDefaultHandler);
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void I2C_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 UART_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 ADC_IRQHandler (void) ALIAS(IntDefaultHandler);
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void WDT_IRQHandler (void) ALIAS(IntDefaultHandler);
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void BOD_IRQHandler (void) ALIAS(IntDefaultHandler);
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void FMC_IRQHandler (void) ALIAS(IntDefaultHandler);
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void USBWakeup_IRQHandler (void) ALIAS(IntDefaultHandler);
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//*****************************************************************************
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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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//*****************************************************************************
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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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//*****************************************************************************
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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")))
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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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SVCall_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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// LPC11U specific handlers
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FLEX_INT0_IRQHandler, // 0 - GPIO pin interrupt 0
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FLEX_INT1_IRQHandler, // 1 - GPIO pin interrupt 1
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FLEX_INT2_IRQHandler, // 2 - GPIO pin interrupt 2
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FLEX_INT3_IRQHandler, // 3 - GPIO pin interrupt 3
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FLEX_INT4_IRQHandler, // 4 - GPIO pin interrupt 4
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FLEX_INT5_IRQHandler, // 5 - GPIO pin interrupt 5
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FLEX_INT6_IRQHandler, // 6 - GPIO pin interrupt 6
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FLEX_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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0, // 10 - Reserved
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0, // 11 - Reserved
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0, // 12 - Reserved
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0, // 13 - Reserved
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SSP1_IRQHandler, // 14 - SPI/SSP1 Interrupt
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I2C_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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UART_IRQHandler, // 21 - UART0
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USB_IRQHandler, // 22 - USB IRQ
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USB_FIQHandler, // 23 - USB FIQ
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ADC_IRQHandler, // 24 - ADC (A/D Converter)
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WDT_IRQHandler, // 25 - WDT (Watchdog Timer)
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BOD_IRQHandler, // 26 - BOD (Brownout Detect)
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FMC_IRQHandler, // 27 - IP2111 Flash Memory Controller
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0, // 28 - Reserved
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0, // 29 - Reserved
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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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#ifndef USE_OLD_STYLE_DATA_BSS_INIT
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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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#else
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//*****************************************************************************
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// The following symbols are constructs generated by the linker, indicating
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// the load address, execution address and length of the RW data section and
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// the execution and length of the BSS (zero initialized) section.
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// Note that these symbols are not normally used by the managed linker script
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// mechanism in Red Suite/LPCXpresso 3.6 (Windows) and LPCXpresso 3.8 (Linux).
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// They are provide here simply so this startup code can be used with earlier
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// versions of Red Suite which do not support the more advanced managed linker
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// script mechanism introduced in the above version. To enable their use,
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// define "USE_OLD_STYLE_DATA_BSS_INIT".
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//*****************************************************************************
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extern unsigned int _etext;
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extern unsigned int _data;
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extern unsigned int _edata;
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extern unsigned int _bss;
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extern unsigned int _ebss;
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#endif
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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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#ifndef USE_OLD_STYLE_DATA_BSS_INIT
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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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#else
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// Use Old Style Data and BSS section initialization.
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// This will only initialize a single RAM bank.
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unsigned int * LoadAddr, *ExeAddr, *EndAddr, SectionLen;
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// Copy the data segment from flash to SRAM.
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LoadAddr = &_etext;
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ExeAddr = &_data;
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EndAddr = &_edata;
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SectionLen = (void*)EndAddr - (void*)ExeAddr;
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data_init((unsigned int)LoadAddr, (unsigned int)ExeAddr, SectionLen);
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// Zero fill the bss segment
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ExeAddr = &_bss;
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EndAddr = &_ebss;
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SectionLen = (void*)EndAddr - (void*)ExeAddr;
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bss_init ((unsigned int)ExeAddr, SectionLen);
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#endif
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#ifdef __USE_CMSIS
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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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{
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while(1)
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{
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}
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}
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__attribute__ ((section(".after_vectors")))
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void HardFault_Handler(void)
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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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__attribute__ ((section(".after_vectors")))
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void SVCall_Handler(void)
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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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__attribute__ ((section(".after_vectors")))
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void PendSV_Handler(void)
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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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__attribute__ ((section(".after_vectors")))
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void SysTick_Handler(void)
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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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//
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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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{
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while(1)
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{
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}
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}
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