μC/OS-II 移植笔记 2（FreeScale 68HCS12 核单片机）

1. F80={/*Interrupttable*/
2. software_trap63,/*63RESERVED*/
3. software_trap62,/*62RESERVED*/
4. software_trap61,/*61RESERVED*/
5. software_trap60,/*60RESERVED*/
6. software_trap59,/*59RESERVED*/
7. software_trap58,/*58RESERVED*/
8. software_trap57,/*57PWMEmergencyShutdown*/
9. software_trap56,/*56PortPInterrupt*/
10. software_trap55,/*55CAN4transmit*/
11. software_trap54,/*54CAN4receive*/
12. software_trap53,/*53CAN4errors*/
13. software_trap52,/*52CAN4wake-up*/
14. software_trap51,/*51CAN3transmit*/
15. software_trap50,/*50CAN3receive*/
16. software_trap49,/*49CAN3errors*/
17. software_trap48,/*48CAN3wake-up*/
18. software_trap47,/*47CAN2transmit*/
19. software_trap46,/*46CAN2receive*/
20. software_trap45,/*45CAN2errors*/
21. software_trap44,/*44CAN2wake-up*/
22. software_trap43,/*43CAN1transmit*/
23. software_trap42,/*42CAN1receive*/
24. software_trap41,/*41CAN1errors*/
25. software_trap40,/*40CAN1wake-up*/
26. software_trap39,/*39CAN0transmit*/
27. software_trap38,/*38CAN0receive*/
28. software_trap37,/*37CAN0errors*/
29. software_trap36,/*36CAN0wake-up*/
30. software_trap35,/*35FLASH*/
31. software_trap34,/*34EEPROM*/
32. software_trap33,/*33SPI2*/
33. software_trap32,/*32SPI1*/
34. software_trap31,/*31IICBus*/
35. software_trap30,/*30BDLC*/
36. software_trap29,/*29CRGSelfClockMode*/
37. software_trap28,/*28CRGPLLlock*/
38. software_trap27,/*27PulseAccumulatorBOverflow*/
39. software_trap26,/*26ModulusDownCounterunderflow*/
40. software_trap25,/*25PortH*/
41. software_trap24,/*24PortJ*/
42. software_trap23,/*23ATD1*/
43. software_trap22,/*22ATD0*/
44. SCI1_ISR,/*21SC11*/
45. SCI0_ISR,/*20SCI0*/
46. software_trap19,/*19SPI0*/
47. software_trap18,/*18Pulseaccumulatorinputedge*/
48. software_trap17,/*17PulseaccumulatorAoverflow*/
49. software_trap16,/*16EnhancedCaptureTimerOverflow*/
50. software_trap15,/*15EnhancedCaptureTimerchannel7*/
51. software_trap14,/*14EnhancedCaptureTimerchannel6*/
52. software_trap13,/*13EnhancedCaptureTimerchannel5*/
53. software_trap12,/*12EnhancedCaptureTimerchannel4*/
54. software_trap11,/*11EnhancedCaptureTimerchannel3*/
55. software_trap10,/*10EnhancedCaptureTimerchannel2*/
56. software_trap09,/*09EnhancedCaptureTimerchannel1*/
57. software_trap08,/*08EnhancedCaptureTimerchannel0*/
58. OSTickISR,/*07RealTimeInterrupt*/
59. software_trap06,/*06IRQ*/
60. software_trap05,/*05XIRQ*/
61. OSCtxSw,/*04SWI-BreakpointonHCS12SerialMon.*/
62. software_trap03,/*03Unimplementedinstructiontrap*/
63. software_trap02,/*02COPfailurereset*/
64. software_trap01//,/*01Clockmonitorfailreset*/
65. //_Startup/*00Resetvector*/
66. };

后记:
当我完成全部移植工作并测试通过后，我又重新审视了一遍整个移植过程，发现走了许多弯路。这些弯路基本都是因为我对C编译器的特性，尤其是内联汇编的处理不熟悉造成的。比如中断处理函数，其实可以直接写到 OS_CPU_C.C 中。就可以省略了 vector.c 文件了。其实我一开始也是这样做的，但是最初的中断处理函数混合了C 语句和汇编语句，产生了各种莫名奇妙的错误。比如下面的RTI中断处理函数代码：

1. interruptVectorNumber_VrtivoidOSTickISR(void)
2. {
3. OSIntNesting++;//4~,NotifyuC/OS-IIaboutISR
4. if(OSIntNesting==1)
5. {
6. __asm
7. {
8. ldxOSTCBCur//3~,OSTCBCur->OSTCBStkPtr=StackPointer
9. sts0,x//3~,}
10. }
11. }
12. CRGFLG_RTIF=1;//clearinterruptflag.
13. OSTimeTick();//6~+,CalluC/OS-IIstickupdatingfunction
14. OSIntExit();//6~+,NotifyuC/OS-IIaboutendofISR
15. }

对比后来的汇编代码，其实已经离成功很近了，只要将其中的C 语句全部用汇编写成来大功告成了：

1. interruptVectorNumber_VrtivoidOSTickISR(void)
2. {
3. __asm
4. {
5. incOSIntNesting
6. ldabOSIntNesting
7. cmpb#$01
8. bneOSTickISR1
9. ldxOSTCBCur
10. sts0,x
11. OSTickISR1:
12. BSET_CRGFLG,#128
13. jsrOSTimeTick
14. jsrOSIntExit
15. }
16. }

其他的代码也一样，都这样改写后就完全不需要 vector.c 文件了。但这里还是将这些本可以省略掉的代码保留下来了，是想记录下一条真实的探索路程。