D语言中的Cortex-M4系列中断向量表处理

• 向量表:
• 在mculib4d中的定义方式

向量表:

// form file:stm32f401xc.h
struct IRQn_Type
{ 

  Reset_IRQn				  = -15,
  NonMaskableInt_IRQn         = -14,    
  MemoryManagement_IRQn       = -12,    
  BusFault_IRQn               = -11,    
  UsageFault_IRQn             = -10,    
  SVCall_IRQn                 = -5,     
  DebugMonitor_IRQn           = -4,     
  PendSV_IRQn                 = -2,     
  SysTick_IRQn                = -1,     

  WWDG_IRQn                   = 0,      
  PVD_IRQn                    = 1,      
  TAMP_STAMP_IRQn             = 2,      
  RTC_WKUP_IRQn               = 3,      
  FLASH_IRQn                  = 4,      
  RCC_IRQn                    = 5,      
  EXTI0_IRQn                  = 6,      
  EXTI1_IRQn                  = 7,      
  EXTI2_IRQn                  = 8,      
  EXTI3_IRQn                  = 9,      
  EXTI4_IRQn                  = 10,     
  DMA1_Stream0_IRQn           = 11,     
  DMA1_Stream1_IRQn           = 12,     
  DMA1_Stream2_IRQn           = 13,     
  DMA1_Stream3_IRQn           = 14,     
  DMA1_Stream4_IRQn           = 15,     
  DMA1_Stream5_IRQn           = 16,     
  DMA1_Stream6_IRQn           = 17,     
  ADC_IRQn                    = 18,     
  EXTI9_5_IRQn                = 23,     
  TIM1_BRK_TIM9_IRQn          = 24,     
  TIM1_UP_TIM10_IRQn          = 25,     
  TIM1_TRG_COM_TIM11_IRQn     = 26,     
  TIM1_CC_IRQn                = 27,     
  TIM2_IRQn                   = 28,     
  TIM3_IRQn                   = 29,     
  TIM4_IRQn                   = 30,     
  I2C1_EV_IRQn                = 31,     
  I2C1_ER_IRQn                = 32,     
  I2C2_EV_IRQn                = 33,     
  I2C2_ER_IRQn                = 34,     
  SPI1_IRQn                   = 35,     
  SPI2_IRQn                   = 36,     
  USART1_IRQn                 = 37,     
  USART2_IRQn                 = 38,     
  EXTI15_10_IRQn              = 40,     
  RTC_Alarm_IRQn              = 41,     
  OTG_FS_WKUP_IRQn            = 42,     
  DMA1_Stream7_IRQn           = 47,     
  SDIO_IRQn                   = 49,     
  TIM5_IRQn                   = 50,     
  SPI3_IRQn                   = 51,     
  DMA2_Stream0_IRQn           = 56,     
  DMA2_Stream1_IRQn           = 57,     
  DMA2_Stream2_IRQn           = 58,     
  DMA2_Stream3_IRQn           = 59,     
  DMA2_Stream4_IRQn           = 60,     
  OTG_FS_IRQn                 = 67,     
  DMA2_Stream5_IRQn           = 68,     
  DMA2_Stream6_IRQn           = 69,     
  DMA2_Stream7_IRQn           = 70,     
  USART6_IRQn                 = 71,     
  I2C3_EV_IRQn                = 72,     
  I2C3_ER_IRQn                = 73,     
  FPU_IRQn                    = 81,     
  SPI4_IRQn                   = 84      
} ;

在mculib4d中的定义方式

static import ldc.attributes;								// 附加参数

enum isr_vector = ldc.attributes.section(".isr_vector");	// 存储 section 的定义
enum naked = ldc.attributes.naked;							// naked 函数

@naked extern(C) void Def_Handler(string nm)()				// 默认中断模板
{ 
	while(true){ }
}

alias VectorFunc = void function();							// 函数型

alias NonMaskableInt_IRQn = Def_Handler!"NonMaskableInt_IRQn";	// 建立一个模板函数
enum IRQs_Max = 0x64;										//初始化的SP定义到了LD脚本内
enum IRQs_Offset = 0x0f;									// 原始定义有负数,需要有修正

extern(C) static immutable VectorFunc[IRQs_Max] CortexM_IVT = { 
  VectorFunc[IRQs_Max] ret;

  ret[0 + IRQs_Offset] = &Reset_Handler;
  ret[IRQn_Type.NonMaskableInt_IRQn + IRQs_Offset] = &NonMaskableInt_IRQn;
  
  
  return ret;
}();

pragma(mangle, NonMaskableInt_IRQn.mangleof) void irq1()		// 可在代码中通过定义替换中断默认模板
{ 
	
}

@naked extern(C) void Reset_Handler()							// 主函数
{ 
	while(true){ }
}

采用这种方式是为了更容易的阅读与书写定位.