嵌入式中断实验报告

1、嵌入式实验报告实验名称中断向量姓名XXX学号XXX一、实验目的理解中断向量表的结构理解中断处理的过程学习中断处理程序的方法二、实验原理打开 cache，地址为 0 x01c00000初始化LED灯：PCONB4-5=0b00 ;使LED7和led8的控制孔为输出口初始化定时器TCFG0 = 199;TCFG1 = 3; /1/16TCMPB0 = 0;TCNTB0 = 9375;TCON = 0 x2;TCON = 0 x9;初始化中断：关中断，即cpsr寄存器的第七位置为1INTCON = 0 x5;INTMOD = 0 x0;工作在IRQ中断模式下INTMSK = 0 x7ffffff &

2、 (1 26 ) & (1 13 );timer0中断允许而后，开中断，即cpsr寄存器的第七位置0设置0 x18处的指令 b函数名设置程序从0 x0处运行，并使用之生成elf格式文件，以便烧写。三、实验内容写一个关于timer0中断的实验，使LED7，LED8可以交替亮将中断程序进行烧写四、实验代码export interrupt_startexport interrupt_stoparea mysection,code,readonly entryinterrupt_startmrs r0,cpsrbic r0,r0,#0 x80msr cpsr_c,r0mov pc,lrinterrup

3、t_stopmrs r0,cpsrorr r0,r0,#0 x80msr cpsr_c,r0mov pc,lrEndMain函数主要代码如下：void interrupt_init( void );void interrupt_start( void );void interrupt_stop( void );void led_init( void );void timer_init( void );void _irq timer_isr( void );int flag=1;#define PCONB#define PDATB*(volatile unsigned int *)0 x01D2

4、0008)*(volatile unsigned int *)0 x01D2000c)#define TCFG0#define TCFG1#define TCON#define TCNTB0#define TCMPB0*(volatile unsigned int *)0 x01D50000)*(volatile unsigned int *)0 x01D50004)*(volatile unsigned int *)0 x01D50008)*(volatile unsigned int *)0 x01D5000c)*(volatile unsigned int *)0 x01D50010)#

5、define INTCON#define INTPND#define INTMOD#define INTMSK#define I_ISPR#define I_ISPC#define rSYSCFG*(volatile unsigned int *)0 x01E00000)*(volatile unsigned int *)0 x01E00004)*(volatile unsigned int *)0 x01E00008)*(volatile unsigned int *)0 x01E0000C)*(volatile unsigned int *)0 x01E00020)*(volatile u

6、nsigned int *)0 x01E00024)(*(volatile unsigned *)0 x1c00000)#define rNCACHBE0 (*(volatile unsigned *)0 x1c00004)#define rNCACHBEl (*(volatile unsigned *)0 x1c00008)#define WRBUFOPT (0 x08)#define SYSCFG_8KB (0 x06 | WRBUFOPT)static void Cache_Init(void)(一rSYSCFG = 0 xf;/ rNCACHBE0 = 0 x20001c00;/rNC

7、ACHBE1 = 0 xe0003000;void _irq timer_isr( void )-if( flag = 1 )PDATB = ( PDATB & ( 3 4 ) ) | ( 0 x2 4 );elsePDATB = ( PDATB & ( 3 4 ) ) | ( 0 x1 4 );flag = flag 八 0 x1;I_ISPC = 1 13 ;void timer_init( void ) TOC o 1-5 h z TCFG0 =199;TCFG1 =3; /1/16TCMPB0 = 0;TCNTB0 = 9375;TCON =0 x2;TCON =0 x9;void led_init( void )PCONB = ( PCONB & ( 3 4 );void interrupt_init( void )interrupt_stop();INTCON =0 x5;INTMOD INTMSK /I_ISPC=0 x0;= 0 x7ffffff & (1 26 ) & (1 13 );=0 x3ffffff ;void Main( void )Cache_Init();led_init();i