K60学习笔记二：PORT中断
1.C预备知识
关于断言：
断言其实就是一个宏定义
void assert_failed(char * ,int ); //断言失败执行的函数
#if define(DEBUG) //在DEBUG模式下进行调用
#define ASSERT(expr) if(!(expr)) \
assert_failed(_FILE_,_LINE_) //宏定义，如果断言失败则执行函数
#else
#define ASSERT(exper) //非DEBUG模式下，不执行断言函数
#endif
void assert_failed(char * file,int line){
printf("Assertion failed in %s at line %d\n",file,line);
while(1){
//死循环等待程序员检测为何断言失败
}
} 在C的编译器环境下有;
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
int main(v0id){
FILE * fp = NULL;
fp = fopen("a.txt","w");
assert(fp);
fclose(fp);
fp = fopen("b.txt","r");
assert(fp); //这里出错，显示文件名和行数
fclose(fp);
return 0;
Assertion failed! //断言失败
Program: C:\Users\ \Desktop\C\ \duanyan.exe
File: C:\Users\duanyan.c, Line 14
Expression: fp
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
}进入正题：
PORT中断的步骤：
设置中断向量表里的中断服务函数，只有中断向量表位与icf的制定的RAM区域是，此函数才有效
void set_vector_handler(VECTORn_t vector ,中断函数名)
//VECTORn_t vector 为一种枚举类型：是中断向量表声明
{
extern uint32 _VECTOR_RAM[];
ASSERT(SCB_VTOR == (uint32)___VECTOR_RAM);//断言，是否在RAM中
__VECTOR_RAM[vector] = (uint32)pfunc_handler;
}
//VECTORn_t vector 为一种枚举类型：是中断向量表声明
typedef enum
{
Initial_Stack_Pointer_VECTORn = 0, /**< Initial stack pointer */
Initial_Program_Counter_VECTORn = 1, /**< Initial program counter */
NMI_VECTORn = 2, /**< Non-maskable interrupt */
Hard_Fault_VECTORn = 3, /**< Hard fault exception */
Reserved4_VECTORn = 4, /**< Reserved interrupt 4 */
Reserved5_VECTORn = 5, /**< Reserved interrupt 5 */
Reserved6_VECTORn = 6, /**< Reserved interrupt 6 */
Reserved7_VECTORn = 7, /**< Reserved interrupt 7 */
Reserved8_VECTORn = 8, /**< Reserved interrupt 8 */
Reserved9_VECTORn = 9, /**< Reserved interrupt 9 */
Reserved10_VECTORn = 10, /**< Reserved interrupt 10 */
SVCall_VECTORn = 11, /**< A supervisor call exception */
Reserved12_VECTORn = 12, /**< Reserved interrupt 12 */
Reserved13_VECTORn = 13, /**< Reserved interrupt 13 */
PendableSrvReq_VECTORn = 14, /**< PendSV exception - request for system level service */
SysTick_VECTORn = 15, /**< SysTick interrupt */
DMA0_VECTORn = 16, /**< DMA channel 0 transfer complete/error interrupt */
DMA1_VECTORn = 17, /**< DMA channel 1 transfer complete/error interrupt */
DMA2_VECTORn = 18, /**< DMA channel 2 transfer complete/error interrupt */
DMA3_VECTORn = 19, /**< DMA channel 3 transfer complete/error interrupt */
Reserved20_VECTORn = 20, /**< Reserved interrupt 20 */
FTFA_VECTORn = 21, /**< FTFA command complete/read collision interrupt */
LVD_LVW_VECTORn = 22, /**< Low Voltage Detect, Low Voltage Warning */
LLW_VECTORn = 23, /**< Low Leakage Wakeup */
I2C0_VECTORn = 24, /**< I2C0 interrupt */
I2C1_VECTORn = 25, /**< I2C0 interrupt 25 */
SPI0_VECTORn = 26, /**< SPI0 interrupt */
SPI1_VECTORn = 27, /**< SPI1 interrupt */
UART0_VECTORn = 28, /**< UART0 status/error interrupt */
UART1_VECTORn = 29, /**< UART1 status/error interrupt */
UART2_VECTORn = 30, /**< UART2 status/error interrupt */
ADC0_VECTORn = 31, /**< ADC0 interrupt */
CMP0_VECTORn = 32, /**< CMP0 interrupt */
TPM0_VECTORn = 33, /**< TPM0 fault, overflow and channels interrupt */
TPM1_VECTORn = 34, /**< TPM1 fault, overflow and channels interrupt */
TPM2_VECTORn = 35, /**< TPM2 fault, overflow and channels interrupt */
RTC_VECTORn = 36, /**< RTC interrupt */
RTC_Seconds_VECTORn = 37, /**< RTC seconds interrupt */
PIT_VECTORn = 38, /**< PIT timer interrupt */
I2S0_VECTORn = 39, /**< I2S0 transmit interrupt */
USB0_VECTORn = 40, /**< USB0 interrupt */
DAC0_VECTORn = 41, /**< DAC0 interrupt */
TSI0_VECTORn = 42, /**< TSI0 interrupt */
MCG_VECTORn = 43, /**< MCG interrupt */
LPTMR_VECTORn = 44, /**< LPTimer interrupt */
Reserved45_VECTORn = 45, /**< Reserved interrupt 45 */
PORTA_VECTORn = 46, /**< Port A interrupt */
PORTC_PORTD_VECTORn = 47 /**< Port C and port D interrupt */
} VECTORn_t;
//PORT端口外部中断函数：
void porta_handler(void)
{
uint8 n = 0; //引脚号
n = 6;
if(PORTA_ISFR & (1 << n)) //PTA6触发中断
{
PORTA_ISFR = (1 << n); //写1清中断标志位
}
}