mini6410中断控制器-VIC中断控制器

1. sf,#0xd2;切换到中断模式下
2. ldrsp,=0x51000000;设置中断模式栈指针
3. msrcpsr_cxsf,#0x13;返回管理模式
6. IMPORTxmain
7. blxmain
9. loop
10. bloop
12. ;***********************************************************************
13. ;中断处理
14. ;***********************************************************************
16. ;K1pressirq
17. EXPORTasm_handle_k1_irq
18. asm_handle_k1_irq
19. sublr,lr,#4;修正返回地址
20. stmdbsp!,{r0-r12,lr};保存程序执行现场
21. ldrlr,=isr_return;设置中断处理程序返回地址
22. IMPORT__do_k1_irq
23. ldrpc,=__do_k1_irq;跳入中断处理程序
26. ;timer0pressirq
27. EXPORTasm_handle_tmr0_irq
28. asm_handle_tmr0_irq
29. sublr,lr,#4;修正返回地址
30. stmdbsp!,{r0-r12,lr};保存程序执行现场
31. ldrlr,=isr_return;设置中断处理程序返回地址
32. IMPORT__do_tmr0_irq
33. ldrpc,=__do_tmr0_irq;跳入中断处理程序
35. isr_return;中断处理返回标签
36. ldmiasp!,{r0-r12,pc}^;恢复程序执行现场，返回继续执行
37. END;程序结束符

init.c
//////////////////////////////////////////////////////////////////////////////////

1. #defineGPNCON(*(volatileunsignedlong*)0x7F008830)
2. #defineGPNPUD(*(volatileunsignedlong*)0x7F008838)
4. #defineEINT0CON0(*(volatileunsignedlong*)0x7F008900)
5. #defineEINT0MASK(*(volatileunsignedlong*)0x7F008920)
7. #defineVIC0IRQSTATUS(*(volatileunsignedlong*)0x71200004)
8. #defineVIC0INTSELECT(*(volatileunsignedlong*)0x7120000C)
9. #defineVIC1INTSELECT(*(volatileunsignedlong*)0x7130000C)
11. #defineVIC0INTENABLE(*(volatileunsignedlong*)0x71200010)
12. #defineVIC1INTENABLE(*(volatileunsignedlong*)0x71300010)
14. #defineVIC0INTENCLEAR(*(volatileunsignedlong*)0x71200014)
15. #defineVIC1INTENCLEAR(*(volatileunsignedlong*)0x71300014)
16. #defineVIC0VECTADDR(*(volatileunsignedlong*)0x71200100)
19. #defineINT_EINT0_BIT0
21. #defineINT_TIMER0_BIT23
23. //////////////////////////////////////////////////////////////////////////////////
24. externvoidasm_handle_k1_irq(void);
25. externvoidasm_handle_tmr0_irq(void);
27. typedefvoid(fnc_t)(void);
28. fnc_t**isr_array=(fnc_t**)0x71200100;
30. voidirq_init()
31. {
33. __asm{
34. mrcp15,0,r0,c1,c0,0;
35. orrr0,r0,#(0x1000000);
36. mcrp15,0,r0,c1,c0,0;
37. }
39. //configureGPN0asEINT0
40. GPNCON&=(~0x2);
41. GPNCON|=0x2;
42. GPNPUD&=~(0x3);
44. //K1,K2fallingedgetrigged
45. EINT0CON0&=(~0x3);
46. EINT0CON0|=0x3;
48. //EnableEINT0irq
49. EINT0MASK&=(~0x1);
51. //SelectINT_EINT0modeasirq
52. VIC0INTSELECT&=(~(1
54. //inittheisraddr
55. isr_array[INT_EINT0_BIT]=(fnc_t*)asm_handle_k1_irq;
56. isr_array[INT_TIMER0_BIT]=(fnc_t*)asm_handle_tmr0_irq;
58. //enableINT_EINT0
59. VIC0INTENABLE|=(1
61. printk("irqinitOK\r\n");
63. }

handle_irq.c

1. //====================================================
3. #defineVIC0ADDRESS(*(volatileunsignedlong*)0x71200F00)
4. #defineVIC1ADDRESS(*(volatileunsignedlong*)0x71300F00)
5. #defineEINT0PEND(*(volatileunsignedlong*)0x7F008924)
6. #defineTINT_CSTAT(*(volatileunsignedlong*)0x7F006044)
9. externintprintk(char*);
11. /*系统中断处理函数*/
12. #defineclear_irq()\
13. do{\
14. VIC0ADDRESS=0;\
15. VIC1ADDRESS=0;\
16. }while(0)
18. void__do_k1_irq(void)
19. {
20. printk("do_irq\r\n");
22. //clearK1irq
23. EINT0PEND=1;
24. //clearVICADDRESS
25. clear_irq();
26. }
28. void__do_tmr0_irq(void)
29. {
30. printk("Timer0irqoccur\r\n");
31. //cleartimer0irq
32. TINT_CSTAT|=1<5;
33. //clearVICADDRESS
34. clear_irq();
35. return;
36. }

main.c

1. //===================================================
3. #defineGPKCON(*(volatileunsignedlong*)0x7F008800)
4. #defineGPKDAT(*(volatileunsignedlong*)0x7F008808)
5. #defineLED_BIT(1<5|1<6|1<7|1<8)
7. externvoiduart_init(void);
8. externvoidirq_init(void);
9. externvoidtimer0_init(void);
10. externintprintk(constchar*str);
11. externvoidled_run(void);
13. intled_on()
14. {
15. GPKCON&=0xFFFF0000;//设置GPB5~8为输出口
16. GPKCON|=0x11110000;
17. GPKDAT=0;//令LED亮灯
18. printk("led_on\n\r");
19. return0;
20. }
22. intxmain(){
23. uart_init();
24. printk("uart_initOK\n\r");
25. led_on();
26. irq_init();
27. timer0_init();
28. led_run();
29. return0;
30. }