在线看毛片网站电影-亚洲国产欧美日韩精品一区二区三区,国产欧美乱夫不卡无乱码,国产精品欧美久久久天天影视,精品一区二区三区视频在线观看,亚洲国产精品人成乱码天天看,日韩久久久一区,91精品国产91免费

<menu id="6qfwx"><li id="6qfwx"></li></menu>

    1. <menu id="6qfwx"><dl id="6qfwx"></dl></menu>
      

      <label id="6qfwx"><ol id="6qfwx"></ol></label><menu id="6qfwx"></menu><object id="6qfwx"><strike id="6qfwx"><noscript id="6qfwx"></noscript></strike></object>
      2. 

          3. <center id="6qfwx"><dl id="6qfwx"></dl></center>
            
	
	
            
		
			
		
            
    
    	
            
  		
            
		    
            
		      
		      
		      
		    
            
  		
            
  		
            
	
            


	


            
		
            
		            
            
        		
            
		
            







            


            
	
	
            
		
            新聞中心
            
	
            
	
            
	
            EEPW首頁 
	 > 嵌入式系統(tǒng) > 設(shè)計應(yīng)用 > Freescale 9S12 系列單片機(jī)應(yīng)用筆記（SCI）3
            
    
            

            

            


	
	
	

            
	
            
		
            
			
            Freescale 9S12 系列單片機(jī)應(yīng)用筆記（SCI）3
            
						
            
				作者：
				時間：2016-11-20
				來源：網(wǎng)絡(luò)
				
				
				
				
				收藏
			
            

			
            
				
				
			
            

			
            
			
			
            
			
			
            
				
				
			
            
                
			這次介紹如何在 uC/OS-II 上實現(xiàn)串口驅(qū)動。

            本文引用地址：http://www.biyoush.com/article/201611/318825.htm
            1. /*sci_ucos.h*/
            2. #ifndef_SCI_RTOS_H_
            3. #define_SCI_RTOS_H_
              #defineSCI_RX_BUF_SIZE64/*NumberofcharactersinRxringbuffer*/
            4. #defineSCI_TX_BUF_SIZE64/*NumberofcharactersinTxringbuffer*/
              /*
            5. *********************************************************************************************************
            6. *CONSTANTS
            7. *********************************************************************************************************
            8. */
              #ifndefNUL
            9. #defineNUL0x00
            10. #endif
              /*ERRORCODES*/
            11. #defineSCI_NO_ERR0/*Functioncallwassuccessful*/
            12. #defineSCI_BAD_CH1/*Invalidcommunicationsportchannel*/
            13. #defineSCI_RX_EMPTY2/*Rxbufferisempty,nocharacteravailable*/
            14. #defineSCI_TX_FULL3/*Txbufferisfull,couldnotdepositcharacter*/
            15. #defineSCI_TX_EMPTY4/*IftheTxbufferisempty.*/
            16. #defineSCI_RX_TIMEOUT5/*Ifatimeoutoccurredwhilewaitingforacharacter*/
            17. #defineSCI_TX_TIMEOUT6/*Ifatimeoutoccurredwhilewaitingtosendachar.*/
            18. #defineSCI_PARITY_NONE0/*Definesforsettingparity*/
            19. #defineSCI_PARITY_ODD1
            20. #defineSCI_PARITY_EVEN2
            21. /*
            22. *********************************************************************************************************
            23. *DATATYPES
            24. *********************************************************************************************************
            25. */
            26. typedefstruct{
            27. shortRingBufRxCtr;/*NumberofcharactersintheRxringbuffer*/
            28. OS_EVENT*RingBufRxSem;/*PointertoRxsemaphore*/
            29. unsignedchar*RingBufRxInPtr;/*Pointertowherenextcharacterwillbeinserted*/
            30. unsignedchar*RingBufRxOutPtr;/*Pointerfromwherenextcharacterwillbeextracted*/
            31. unsignedcharRingBufRx[SCI_RX_BUF_SIZE];/*Ringbuffercharacterstorage(Rx)*/
            32. shortRingBufTxCtr;/*NumberofcharactersintheTxringbuffer*/
            33. OS_EVENT*RingBufTxSem;/*PointertoTxsemaphore*/
            34. unsignedchar*RingBufTxInPtr;/*Pointertowherenextcharacterwillbeinserted*/
            35. unsignedchar*RingBufTxOutPtr;/*Pointerfromwherenextcharacterwillbeextracted*/
            36. unsignedcharRingBufTx[SCI_TX_BUF_SIZE];/*Ringbuffercharacterstorage(Tx)*/
            37. }SCI_RING_BUF;
            38. /**
            39. *Toobtainacharacterfromthecommunicationschannel.
            40. *@paramport,portcanbeSCI0/SCI1
            41. *@paramto,istheamountoftime(inclockticks)thatthecallingfunctioniswillingto
            42. *waitforacharactertoarrive.Ifyouspecifyatimeoutof0,thefunctionwill
            43. *waitforeverforacharactertoarrive.
            44. *@paramerr,isapointertowhereanerrorcodewillbeplaced:
            45. **errissettoSCI_NO_ERRifacharacterhasbeenreceived
            46. **errissettoSCI_RX_TIMEOUTifatimeoutoccurred
            47. **errissettoSCI_BAD_CHifyouspecifyaninvalidchannelnumber
            48. *@returnThecharacterinthebuffer(orNULifatimeoutoccurred)
            49. */
            50. unsignedcharSCIGetCharB(unsignedcharch,unsignedshortto,unsignedchar*err);
              /**
            51. *Thisfunctioniscalledbyyourapplicationtosendacharacteronthecommunications
            52. *channel.Thefunctionwillwaitforthebuffertoemptyoutifthebufferisfull.
            53. *Thefunctionreturnstoyourapplicationifthebufferdoesntemptywithinthespecified
            54. *timeout.Atimeoutvalueof0meansthatthecallingfunctionwillwaitforeverforthe
            55. *buffertoemptyout.ThecharactertosendisfirstinsertedintotheTxbufferandwill
            56. *besentbytheTxISR.Ifthisisthefirstcharacterplacedintothebuffer,theTxISR
            57. *willbeenabled.
            58. *
            59. *@paramport,portcanbeSCI0/SCI1
            60. *@paramcisthecharactertosend.
            61. *@paramtoisthetimeout(inclockticks)towaitincasethebufferisfull.Ifyou
            62. *specifyatimeoutof0,thefunctionwillwaitforeverforthebuffertoempty.
            63. *@returnSCI_NO_ERRifthecharacterwasplacedintheTxbuffer
            64. *SCI_TX_TIMEOUTifthebufferdidntemptywithinthespecifiedtimeoutperiod
            65. *SCI_BAD_CHifyouspecifyaninvalidchannelnumber
            66. */
            67. unsignedcharSCIPutCharB(unsignedcharport,unsignedcharc,unsignedshortto);
              /**
            68. *Toinitializethecommunicationsmodule.
            69. *Youmustcallthisfunctionbeforecallinganyotherfunctions.
            70. */
            71. voidSCIBufferInit(void);
              /**
            72. *Toseeifanycharacterisavailablefromthecommunicationschannel.
            73. *
            74. *@paramport,portcanbeSCI0/SCI1
            75. *@returnIfatleastonecharacterisavailable,thefunctionreturns
            76. *FALSE(0)otherwise,thefunctionreturnsTRUE(1).
            77. */
            78. unsignedcharSCIBufferIsEmpty(unsignedcharport);
            79. /**
            80. *ToseeifanymorecharacterscanbeplacedintheTxbuffer.
            81. *Inotherwords,thisfunctionchecktoseeiftheTxbufferisfull.
            82. *
            83. *@paramport,portcanbeSCI0/SCI1
            84. *@returnIfthebufferisfull,thefunctionreturnsTRUE
            85. *otherwise,thefunctionreturnsFALSE.
            86. */
            87. unsignedcharSCIBufferIsFull(unsignedcharport);
              #endif

            1. /**
            2. *SCI(SerialCommunicationInterface)BufferedSerialI/O
            3. *@filesci_ucos.c
            4. *@authorLiYuan
            5. *@platformmc9s12XX
            6. *@date2012-7-22
            7. *@version1.0.1
            8. */
            9. #include"derivative.h"/*derivative-specificdefinitions*/
            10. #include
            11. #include"includes.H"
            12. #include"sci.h"
            13. #include"sci_rtos.h"
              /**
            14. *GLOBALVARIABLES
            15. */
            16. SCI_RING_BUFSCI0Buf;
            17. SCI_RING_BUFSCI1Buf;
            18. /**
            19. *Toobtainacharacterfromthecommunicationschannel.
            20. *@paramport,portcanbeSCI0/SCI1
            21. *@paramto,istheamountoftime(inclockticks)thatthecallingfunctioniswillingto
            22. *waitforacharactertoarrive.Ifyouspecifyatimeoutof0,thefunctionwill
            23. *waitforeverforacharactertoarrive.
            24. *@paramerr,isapointertowhereanerrorcodewillbeplaced:
            25. **errissettoSCI_NO_ERRifacharacterhasbeenreceived
            26. **errissettoSCI_RX_TIMEOUTifatimeoutoccurred
            27. **errissettoSCI_BAD_CHifyouspecifyaninvalidchannelnumber
            28. *@returnThecharacterinthebuffer(orNULifatimeoutoccurred)
            29. */
            30. unsignedcharSCIGetCharB(unsignedcharport,unsignedshortto,INT8U*err)
            31. {
            32. #ifOS_CRITICAL_METHOD==3u/*AllocatestorageforCPUstatusregister*/
            33. OS_CPU_SRcpu_sr=0u;
            34. #endif
            35. unsignedcharc;
            36. unsignedcharoserr;
            37. SCI_RING_BUF*pbuf;
              switch(port)
            38. {/*Obtainpointertocommunicationschannel*/
            39. caseSCI0:
            40. pbuf=&SCI0Buf;
            41. break;
              caseSCI1:
            42. pbuf=&SCI1Buf;
            43. break;
              default:
            44. *err=SCI_BAD_CH;
            45. return(0);
            46. }
            47. OSSemPend(pbuf->RingBufRxSem,to,&oserr);/*Waitforcharactertoarrive*/
            49. if(oserr==OS_TIMEOUT)
            50. {/*Seeifcharactersreceivedwithintimeout*/
            51. *err=SCI_RX_TIMEOUT;/*No,returnerrorcode*/
            52. return(NUL);
            53. }
            54. else
            55. {
            56. OS_ENTER_CRITICAL();
            57. pbuf->RingBufRxCtr--;/*Yes,decrementcharactercount*/
            58. c=*pbuf->RingBufRxOutPtr++;/*Getcharacterfrombuffer*/
            59. if(pbuf->RingBufRxOutPtr==&pbuf->RingBufRx[SCI_RX_BUF_SIZE]){/*WrapOUTpointer*/
            60. pbuf->RingBufRxOutPtr=&pbuf->RingBufRx[0];
            61. }
            62. OS_EXIT_CRITICAL();
            63. *err=SCI_NO_ERR;
            64. return(c);
            65. }
            66. }
              /**
            67. *Thisfunctioniscalledbyyourapplicationtosendacharacteronthecommunications
            68. *channel.Thefunctionwillwaitforthebuffertoemptyoutifthebufferisfull.
            69. *Thefunctionreturnstoyourapplicationifthebufferdoesntemptywithinthespecified
            70. *timeout.Atimeoutvalueof0meansthatthecallingfunctionwillwaitforeverforthe
            71. *buffertoemptyout.ThecharactertosendisfirstinsertedintotheTxbufferandwill
            72. *besentbytheTxISR.Ifthisisthefirstcharacterplacedintothebuffer,theTxISR
            73. *willbeenabled.
            74. *
            75. *@paramport,portcanbeSCI0/SCI1
            76. *@paramcisthecharactertosend.
            77. *@paramtoisthetimeout(inclockticks)towaitincasethebufferisfull.Ifyou
            78. *specifyatimeoutof0,thefunctionwillwaitforeverforthebuffertoempty.
            79. *@returnSCI_NO_ERRifthecharacterwasplacedintheTxbuffer
            80. *SCI_TX_TIMEOUTifthebufferdidntemptywithinthespecifiedtimeoutperiod
            81. *SCI_BAD_CHifyouspecifyaninvalidchannelnumber
            82. */
            83. unsignedcharSCIPutCharB(unsignedcharport,unsignedcharc,unsignedshortto)
            84. {
            85. #ifOS_CRITICAL_METHOD==3u/*AllocatestorageforCPUstatusregister*/
            86. OS_CPU_SRcpu_sr=0u;
            87. #endif
              SCI_RING_BUF*pbuf;
            88. unsignedcharoserr;
            89. switch(port)
            90. {/*Obtainpointertocommunicationschannel*/
            91. caseSCI0:
            92. pbuf=&SCI0Buf;
            93. break;
              caseSCI1:
            94. pbuf=&SCI1Buf;
            95. break;
              default:
            96. return(SCI_BAD_CH);
            97. }
              OSSemPend(pbuf->RingBufTxSem,to,&oserr);/*WaitforspaceinTxbuffer*/
            98. if(oserr==OS_TIMEOUT)
            99. {
            100. return(SCI_TX_TIMEOUT);/*Timedout,returnerrorcode*/
            101. }
            102. OS_ENTER_CRITICAL();
            103. pbuf->RingBufTxCtr++;/*No,incrementcharactercount*/
            104. *pbuf->RingBufTxInPtr++=c;/*Putcharacterintobuffer*/
            105. if(pbuf->RingBufTxInPtr==&pbuf->RingBufTx[SCI_TX_BUF_SIZE])
            106. {
            107. pbuf->RingBufTxInPtr=&pbuf->RingBufTx[0];/*WrapINpointer*/
            108. }
            109. if(pbuf->RingBufTxCtr==1)/*Seeifthisisthefirstcharacter*/
            110. {
            111. SCIEnableTxInt(port);/*Yes,EnableTxinterrupts*/
            112. }
            113. OS_EXIT_CRITICAL();
            114. return(SCI_NO_ERR);
            115. }
              /**
            116. *Toinitializethecommunicationsmodule.
            117. *Youmustcallthisfunctionbeforecallinganyotherfunctions.
            118. */
            119. voidSCIBufferInit(void)
            120. {
            121. SCI_RING_BUF*pbuf;
              pbuf=&SCI0Buf;/*InitializetheringbufferforSCI0*/
            122. pbuf->RingBufRxCtr=0;
            123. pbuf->RingBufRxInPtr=&pbuf->RingBufRx[0];
            124. pbuf->RingBufRxOutPtr=&pbuf->RingBufRx[0];
            125. pbuf->RingBufRxSem=OSSemCreate(0);
            126. pbuf->RingBufTxCtr=0;
            127. pbuf->RingBufTxInPtr=&pbuf->RingBufTx[0];
            128. pbuf->RingBufTxOutPtr=&pbuf->RingBufTx[0];
            129. pbuf->RingBufTxSem=OSSemCreate(SCI_TX_BUF_SIZE);
              pbuf=&SCI1Buf;/*InitializetheringbufferforSCI1*/
            130. pbuf->RingBufRxCtr=0;
            131. pbuf->RingBufRxInPtr=&pbuf->RingBufRx[0];
            132. pbuf->RingBufRxOutPtr=&pbuf->RingBufRx[0];
            133. pbuf->RingBufRxSem=OSSemCreate(0);
            134. pbuf->RingBufTxCtr=0;
            135. pbuf->RingBufTxInPtr=&pbuf->RingBufTx[0];
            136. pbuf->RingBufTxOutPtr=&pbuf->RingBufTx[0];
            137. pbuf->RingBufTxSem=OSSemCreate(SCI_TX_BUF_SIZE);
            138. }
              /**
            139. *Toseeifanycharacterisavailablefromthecommunicationschannel.
            140. *
            141. *@paramport,portcanbeSCI0/SCI1
            142. *@returnIfatleastonecharacterisavailable,thefunctionreturns
            143. *FALSE(0)otherwise,thefunctionreturnsTRUE(1).
            144. */
            145. unsignedcharSCIBufferIsEmpty(unsignedcharport)
            146. {
              #ifOS_CRITICAL_METHOD==3u/*AllocatestorageforCPUstatusregister*/
            147. OS_CPU_SRcpu_sr=0u;
            148. #endif
            149. unsignedcharempty;
            150. SCI_RING_BUF*pbuf;
            151. switch(port)
            152. {/*Obtainpointertocommunicationschannel*/
            153. caseSCI0:
            154. pbuf=&SCI0Buf;
            155. break;
              caseSCI1:
            156. pbuf=&SCI1Buf;
            157. break;
            158. default:
            159. return(0xff);
            160. break;
            161. }
            162. OS_ENTER_CRITICAL();
            163. if(pbuf->RingBufRxCtr>0)
            164. {/*Seeifbufferisempty*/
            165. empty=0;/*BufferisNOTempty*/
            166. }
            167. else
            168. {
            169. empty=1;/*Bufferisempty*/
            170. }
            171. OS_EXIT_CRITICAL();
            172. return(empty);
              }
              /**
            173. *ToseeifanymorecharacterscanbeplacedintheTxbuffer.
            174. *Inotherwords,thisfunctionchecktoseeiftheTxbufferisfull.
            175. *
            176. *@paramport,portcanbeSCI0/SCI1
            177. *@returnIfthebufferisfull,thefunctionreturnsTRUE
            178. *otherwise,thefunctionreturnsFALSE.
            179. */
            180. unsignedcharSCIBufferIsFull(unsignedcharport)
            181. {
            182. #ifOS_CRITICAL_METHOD==3u/*AllocatestorageforCPUstatusregister*/
            183. OS_CPU_SRcpu_sr=0u;
            184. #endif
            185. charfull;
            186. SCI_RING_BUF*pbuf;
            187. switch(port)
            188. {/*Obtainpointertocommunicationschannel*/
            189. caseSCI0:
            190. pbuf=&SCI0Buf;
            191. break;
              caseSCI1:
            192. pbuf=&SCI1Buf;
            193. break;
              default:
            194. return(255);
            195. }
            196. OS_ENTER_CRITICAL();
            197. if(pbuf->RingBufTxCtr
            198. full=0;/*BufferisNOTfull*/
            199. }else{
            200. full=1;/*Bufferisfull*/
            201. }
            202. OS_EXIT_CRITICAL();
            203. return(full);
            204. }
            205. //ThisfunctioniscalledbytheRxISRtoinsertacharacterintothereceiveringbuffer.
            206. staticvoidSCIPutRxChar(unsignedcharport,unsignedcharc)
            207. {
              SCI_RING_BUF*pbuf;
              switch(port)
            208. {/*Obtainpointertocommunicationschannel*/
            209. caseSCI0:
            210. pbuf=&SCI0Buf;
            211. break;
              caseSCI1:
            212. pbuf=&SCI1Buf;
            213. break;
              default:
            214. return;
            215. }
            216. if(pbuf->RingBufRxCtr
            217. pbuf->RingBufRxCtr++;/*No,incrementcharactercount*/
            218. *pbuf->RingBufRxInPtr++=c;/*Putcharacterintobuffer*/
            219. if(pbuf->RingBufRxInPtr==&pbuf->RingBufRx[SCI_RX_BUF_SIZE]){/*WrapINpointer*/
            220. pbuf->RingBufRxInPtr=&pbuf->RingBufRx[0];
            221. }
            222. (void)OSSemPost(pbuf->RingBufRxSem);/*Indicatethatcharacterwasreceived*/
            223. }
            224. }
            225. //ThisfunctioniscalledbytheTxISRtoextractthenextcharacterfromtheTxbuffer.
            226. //ThefunctionreturnsFALSEifthebufferisemptyafterthecharacterisextractedfrom
            227. //thebuffer.ThisisdonetosignaltheTxISRtodisableinterruptsbecausethisisthe
            228. //lastcharactertosend.
            229. staticunsignedcharSCIGetTxChar(unsignedcharport,unsignedchar*err)
            230. {
            231. unsignedcharc;
            232. SCI_RING_BUF*pbuf;
              switch(port)
            233. {/*Obtainpointertocommunicationschannel*/
            234. caseSCI0:
            235. pbuf=&SCI0Buf;
            236. break;
              caseSCI1:
            237. pbuf=&SCI1Buf;
            238. break;
              default:
            239. *err=SCI_BAD_CH;
            240. return(0);
            241. }
            242. if(pbuf->RingBufTxCtr>0){/*Seeifbufferisempty*/
            243. pbuf->RingBufTxCtr--;/*No,decrementcharactercount*/
            244. c=*pbuf->RingBufTxOutPtr++;/*Getcharacterfrombuffer*/
            245. if(pbuf->RingBufTxOutPtr==&pbuf->RingBufTx[SCI_TX_BUF_SIZE]){/*WrapOUTpointer*/
            246. pbuf->RingBufTxOutPtr=&pbuf->RingBufTx[0];
            247. }
            248. (void)OSSemPost(pbuf->RingBufTxSem);/*Indicatethatcharacterwillbesent*/
            249. *err=SCI_NO_ERR;
            250. return(c);/*Charactersarestillavailable*/
            251. }else{
            252. *err=SCI_TX_EMPTY;
            253. return(NUL);/*Bufferisempty*/
            254. }
            255. }
            256. voidSCI0_ISR_Handler(void)
            257. {
            258. charstatus;
            259. chardata;
            260. unsignedcharerr;
            262. status=SCI0SR1;
              if(status&0x0F)//0x1F=00011111,ifstatusisnotReceiveDataRegFullFlag
            263. {
            264. //Seeifwehavesomekindoferror
            265. //Clearinterrupt(donothingaboutit!)
            266. data=SCI0DRL;
            267. }
            268. elseif(status&0x20)//ReceiveDataRegFullFlag
            269. {
            270. data=SCI0DRL;
            271. SCIPutRxChar(SCI0,data);//Insertreceivedcharacterintobuffer
            272. }
            273. elseif(status&0x80)
            274. {
            275. data=SCIGetTxChar(SCI0,&err);//Getnextcharactertosend.
            276. if(err==SCI_TX_EMPTY)
            277. {//Dowehaveanymorecharacterstosend?
            278. //No,DisableTxinterrupts
            279. SCIDisTxInt(SCI0);
            280. }
            281. else
            282. {
            283. SCI0DRL=data;//Yes,Sendcharacter
            284. }
            285. }
            286. }
            287. voidSCI1_ISR_Handler(void)
            288. {
            289. charstatus;
            290. chardata;
            291. unsignedcharerr;
            293. status=SCI1SR1;
              if(status&0x0F)//0x1F=00011111,ifstatusisnotReceiveDataRegFullFlag
            294. {
            295. //Seeifwehavesomekindoferror
            296. //Clearinterrupt(donothingaboutit!)
            297. data=SCI1DRL;
            298. }
            299. elseif(status&0x20)//ReceiveDataRegFullFlag
            300. {
            301. data=SCI1DRL;
            302. SCIPutRxChar(SCI1,data);//Insertreceivedcharacterintobuffer
            303. }
            304. elseif(status&0x80)
            305. {
            306. data=SCIGetTxChar(SCI1,&err);//Getnextcharactertosend.
            307. if(err==SCI_TX_EMPTY)
            308. {//Dowehaveanymorecharacterstosend?
            309. //No,DisableTxinterrupts
            310. SCIDisTxInt(SCI1);
            311. }
            312. else
            313. {
            314. SCI1DRL=data;//Yes,Sendcharacter
            315. }
            316. }
            317. }
              #pragmaCODE_SEGNON_BANKED
            318. interruptVectorNumber_Vsci0voidSCI0_ISR(void)
            319. {
              #ifdefined(__BANKED__)||defined(__LARGE__)||defined(__PPAGE__)
            320. __asmldaaPPAGE;//3~,GetcurrentvalueofPPAGEregister
            321. __asmpsha;//2~,PushPPAGEregisterontocurrenttasksstack
            322. #endif
            324. __asmincOSIntNesting;//OSIntNesting++;
              //if(OSIntNesting==1)
            325. //{
            326. //OSTCBCur->OSTCBStkPtr=StackPointer;
            327. //}
            328. __asm
            329. {
            330. ldabOSIntNesting
            331. cmpb#$01
            332. bneSCI0ISR1
              ldxOSTCBCur
            333. sts0,x
            334. SCI0ISR1:
            335. }
              #ifdefined(__BANKED__)||defined(__LARGE__)||defined(__PPAGE__)
            336. __asmcallSCI0_ISR_Handler;
            337. __asmcallOSIntExit;
            338. #else
            339. __asmjsrSCI0_ISR_Handler;
            340. __asmjsrOSIntExit;
            341. #endif
              #ifdefined(__BANKED__)||defined(__LARGE__)||defined(__PPAGE__)
            342. __asmpula;//3~,GetvalueofPPAGEregister
            343. __asmstaaPPAGE;//3~,StoreintoCPUsPPAGEregister
            344. #endif
              }
              interruptVectorNumber_Vsci1voidSCI1_ISR(void)
            345. {
              #ifdefined(__BANKED__)||defined(__LARGE__)||defined(__PPAGE__)
            346. __asmldaaPPAGE;//3~,GetcurrentvalueofPPAGEregister
            347. __asmpsha;//2~,PushPPAGEregisterontocurrenttasksstack
            348. #endif
            350. __asmincOSIntNesting;//OSIntNesting++;
              //if(OSIntNesting==1)
            351. //{
            352. //OSTCBCur->OSTCBStkPtr=StackPointer;
            353. //}
            354. __asm
            355. {
            356. ldabOSIntNesting
            357. cmpb#$01
            358. bneSCI1ISR1
              ldxOSTCBCur
            359. sts0,x
            360. SCI1ISR1:
            361. }
              #ifdefined(__BANKED__)||defined(__LARGE__)||defined(__PPAGE__)
            362. __asmcallSCI1_ISR_Handler;
            363. __asmcallOSIntExit;
            364. #else
            365. __asmjsrSCI1_ISR_Handler;
            366. __asmjsrOSIntExit;
            367. #endif
              #ifdefined(__BANKED__)||defined(__LARGE__)||defined(__PPAGE__)
            368. __asmpula;//3~,GetvalueofPPAGEregister
            369. __asmstaaPPAGE;//3~,StoreintoCPUsPPAGEregister
            370. #endif
              }
            下面給個簡單的例子：
            1. #include/*commondefinesandmacros*/
            2. #include"derivative.h"/*derivative-specificdefinitions*/
              #include"INCLUDES.H"
            3. #include"crg.h"
            4. #include"sci.h"
            5. #include"sci_rtos.h"
              OS_STKAppStartTaskStk[64];
              staticvoidAppStartTask(void*pdata);
              voidmain(void)
            6. {
            7. /*putyourowncodehere*/
            8. OS_CPU_SRcpu_sr;
              CRGInit();
            9. CRGSetRTIFreqency(0x54);//200Hz
              EnableInterrupts;
            11. OS_ENTER_CRITICAL();
            12. SCIInit(SCI0);
            13. SCIInit(SCI1);
            14. OS_EXIT_CRITICAL();
            16. OSInit();
            18. SCISetIEBit(SCI0,SCI_RIE);
            19. SCISetIEBit(SCI1,SCI_RIE);
            20. SCIBufferInit();
            22. (void)OSTaskCreate(AppStartTask,(void*)0x4321,(void*)&AppStartTaskStk[63],0);
            23. (void)OSStart();
            25. for(;;)
            26. {
            27. _FEED_COP();/*feedsthedog*/
            28. }/*loopforever*/
            30. /*pleasemakesurethatyouneverleavemain*/
            31. }
              staticvoidAppStartTask(void*pdata)
            32. {
            33. INT8Uerr;
            34. charC;
            35. (void)pdata;
            36. for(;;)
            37. {
            38. C=SCIGetCharB(SCI1,0,&err);
            39. if(err==SCI_NO_ERR)
            40. (void)SCIPutCharB(SCI1,C,0);
            41. }
            42. }

            
				
            
                
			
							
            
                
			              
              
            
            
		
            
		
            
		
            
		
            
		
            
			
              
				
            • 
					
					
			  	
              • 
			  	
            • 
					
					
			  	
              • 
			  	
            • 
					
					
			  	
              • 
				
            • 
					
					
				
              • 
				
            • 
					
					
				
              • 
			
            
			
            
		
            
		
		
            
		
            
			
			
		
            
        
		
            
			
            關(guān)鍵詞：
            			            Freescale9S12系列單片
                        
            
            
            
			
            
		
            	
		

	

            
	
	
            
		
            
			
            評論
            					
		
            
		
            
			
            
			
				
            
					
					
            
						
                        
					
            
				
            
                		
						
						
			
            
		
            
		
            
		
            
            
			
            
		
            
	
            
	
            
	
            
		
		

            


	
            
	
            
		
		
	
            


    
            
        
            技術(shù)專區(qū)
            
      
            
      
            
			
      
             
       

            

   











            
	
            
	    關(guān)閉