andior：
用TMS320LF2407實現(xiàn)三相SPWM波形發(fā)生器FCL.usect ".data0",1;保存載波頻率浮點數(shù)的低位FCH.usect ".data0",1;保存載波頻率浮點數(shù)的高位FRL.usect ".data0",1;保存信號頻率浮點數(shù)的低位FRH.usect ".data0",1;保存信號頻率浮點數(shù)的高位AL.usect ".data0",1;保存調(diào)諧度浮點數(shù)低位AH.usect ".data0",1;保存調(diào)諧度浮點數(shù)高位N .usect ".data0",1 ;保存一個周期要輸出的PWM脈沖個數(shù)NL.usect ".data0",1;保存一個周期要輸出的PWM脈沖個數(shù)浮點數(shù)低位NH.usect ".data0",1;保存一個周期要輸出的PWM脈沖個數(shù)浮點數(shù)低位I.usect ".data0",1;保存當前輸出的是第幾個脈沖T3PR_TEMPL .usect".data0",1;保存定時器3周期寄存器值的浮點數(shù)低位 T3PR_TEMPH.usect".data0",1;保存定時器3周期寄存器值的浮點數(shù)高位 DATIOL .usect".data0",1;保存占空比浮點數(shù)低位DATIOH .usect".data0",1;保存占空比浮點數(shù)低位DFLAG.usect ".data0",1;送出一個脈沖的標志寄存器.include "F2407REGS.H";引用頭部文件.refF$$ITOF,F$$DIV,F$$MUL,F$$FTOI,F$$ADD,F$$LTOF,F$$SUB.ref _sin.def _c_int0;(1)建立中斷向量表.sect".vectors";定義主向量段RSVECTB _c_int0;PM0ResetVector1INT1 B PHANTOM;PM2Intlevel14INT2 B GISR2;PM4Intlevel25INT3 B PHANTOM;PM6Intlevel36INT4 B PHANTOM;PM8Intlevel47INT5 B PHANTOM;PMAIntlevel58INT6 B PHANTOM;PMCIntlevel69RESERVED B PHANTOM;PME(AnalysisInt)10SW_INT8 B PHANTOM;PM10 UserS/Wint— ? ?SW_INT31 B PHANTOM;PM3E UserS/Wint—;中斷子向量入口定義pvecs.sect".pvecs";定義子向量段PVECTORSBPHANTOM;Reservedpvectoraddroffset-0000hBPHANTOM;Reservedpvectoraddroffset-0001h ? ?BPHANTOM;Reservedpvectoraddroffset-002EhBT3GP_ISR;Reservedpvectoraddroffset-002Fh T3PINT中斷BPHANTOM;Reservedpvectoraddroffset-0030h ? ?BPHANTOM;Reservedpvectoraddroffset-0041h;(2)主程序.text_c_int0: CALLSYSINIT;調(diào)系統(tǒng)初始化子程序CALLPWM_INIT;調(diào)PWM初始化子程序 LDP#5SPLK#2710H,FCL;載波頻率SPLK#0,FCHSPLK#032H,FRL;信號頻率SPLK#0,FRHSPLK#3E8H,AL;調(diào)諧度AL=A*1000SPLK#0,AHSPLK#0,I;I=0SPLK#1,DFLAG CALL JISUANLOOP:LDP#5BITDFLAG,BIT0BCNDLOOP,NTCLACLDFLAGAND#0FFFEHSACLDFLAGCALLDATIOBLOOP;(3)系統(tǒng)初始化程序SYSINIT:SETCINTMCLRCCNFLDP#0SPLK#02h,IMR;使能第1級中斷2SPLK#0FFFFh,IFR;清第1級所有中斷標志位LDP#DP_PF1SPLK#0E8h,WDCR;禁止WDTLDP#00E0HSPLK#81FEH,SCSR1 ;CLKIN=6M,CLKOUT=24MRET;(4)EVB模塊的PWM初始化程序PWM_INIT:LDP#DP_PF2LACLMCRAOR#07EH;IOPE1~IOPE6SACLMCRC;配置為特殊功能LACLMCRCOR#600hSACLMCRCLDP#DP_EVBSPLK#0FFFFh,EVBIFRA;清EVA的所有中斷標志位SPLK#0555h,ACTRB;PWM6,4,2為低,PWM5,3,1為高SPLK#00h,DBTCONB;禁止死區(qū)控制SPLK#1fh,CMPR4;給比較寄存器賦初值SPLK#2Fh,CMPR5SPLK#3fh,CMPR6SPLK#0960h,T3PR;給周期寄存器賦初值LDP#5SPLK#0960h,T3PR_TEMPLSPLK#0,T3PR_TEMPHLDP#DP_EVBSPLK#0A600h,COMCONB;禁止比較功能SPLK0,T3CNTSPLK#41h,GPTCONBSPLK#080h,EVBIMRASPLK#0000101101001110b,T3CONCLRCINTMRET;(5)將一些整數(shù)轉換為浮點數(shù)子程序,得到計算占空比要用的常數(shù)JISUAN:LDP#5;調(diào)諧度由整形轉換為浮點LACLALLRLK AR1,STACK ;設置STACK指針SETCSXMCALLF$$ITOF,AR1;A=a×1000CLRCSXMMAR*-LACC*-,16ADDS*SACLALSACHAHLRLKAR1,STACK;A/2000=0.5aSETCSXMLACL#0SACL*+LACL#44FAH;44FA0000h=2000SACL*+LACLALSACL*+LACLAHSACL*+CALLF$$DIVMAR*-LACC*-,16ADDS*SACLALSACHAHLACLT3PR_TEMPLLRLK AR1,STACKSETCSXM;定時器周期寄存器;的值轉換為浮點數(shù)CALLF$$ITOF,AR1CLRCSXMMAR*-LACC*-,16ADDS*SACLT3PR_TEMPLSACHT3PR_TEMPHLACLFCL;FC值轉換為浮點數(shù)LRLK AR1,STACKSETCSXMCALLF$$LTOF,AR1CLRCSXMMAR*-LACC*-,16ADDS*SACLFCLSACHFCHLACLFRLLRLK AR1,STACKSETCSXM ;FR值轉換為浮點數(shù)CALLF$$ITOF,AR1CLRCSXMMAR*-LACC*-,16ADDS*SACLFRLSACHFRHLRLK AR1,STACK;N=FC/FRLACLFRLSACL*+LACLFRHSACL*+LACLFCLSACL*+LACLFCHSACL*+CALLF$$DIVMAR*-LACC*-,16ADDS*SACLNLSACHNH;N的浮點數(shù)LRLK AR1,STACKSETCSXMSACL*+SACH*+CALLF$$FTOISACLN;N的整數(shù)LRLKAR1,STACKSACL*+LACLNHSACL*+LACL#0F5C3H;40C8F5C3h=6.282=2×3.141SACL*+LACL#40C8HSACL*+CALLF$$DIVMAR*-LACC*-,16ADDS*SACLNLSACHNHRET;(6)計算占空比子程序DATIO:LDP#5LACLI ;I由整形轉換為浮點數(shù)LRLK AR1,STACKSETCSXMCALLF$$ITOF,AR1CLRCSXMMAR*-LACC*-,16ADDS*;結果保存在ACCLRLKAR1,STACK;i*2*3.14/NSACL*+SACH*+LACLNLSACL*+LACLNHSACL*+CALLF$$MULMAR*-ZALH*-ADDS*LRLK AR1,STACK;sin(i*2*3.14/N)SACL*+SACH*+CALL_sin;結果在ACCLRLK AR1,STACK;0.5a*sin(i*2*3.14/N)SACL*+SACH*+LACLALSACL*+LACLAHSACL*+CALLF$$MULMAR*-ZALH*-ADDS*;結果在ACCLRLK AR1,STACK;D=0.5+A*sin(i*2*3.14/N)SACL*+SACH*+LACL#0SACL*+LACL#3F00H;3F000000h=0.5SACL *+CALLF$$ADDMAR*-ZALH*-ADDS*;結果在ACCLRLKAR1,STACKSACL*+SACH*+LACLT3PR_TEMPLSACL*+LACLT3PR_TEMPHSACL*+CALLF$$MULMAR*-ZALH*-ADDS*;結果在ACCLRLK AR1,STACK;CMPR的浮點數(shù)轉換為整數(shù)SETCSXMSACL*+SACH*+CALLF$$FTOI,AR1CLRCSXM;結果在ACCSACLDATIOLLDP#5LACCISUBNBCNDNSPWM,GEQLACCIADD#1SACLIBRRETNSPWM:SPLK#0,I;斷是否是下一個周期RRET:RET PHANTOM:KICK_DOG;復位WD計數(shù)器RET;(7)定時器3中斷程序GISR2:SST#0,ST0_CON1;保存狀態(tài)寄存器SST#1,ST1_CON1LDP#0E0h;DP指針指向PIVR所在的數(shù)據(jù)區(qū)LACCPIVR,1;讀EVIVRB,結果左移一位ADD#PVECTORS;加上偏移量BACCT3GP_ISR:LDP#5LACCDFLAGOR#1;設置DFLAG.15＝1SACLDFLAGLACLDATIOLLDP#DP_EVBSACLCMPR4;更新比較寄存器的值ADD#32HSACLCMPR5ADD#32HSACLCMPR6LDP#0LST#1,ST1_CON1LST#0,ST0_CON1LDP#DP_EVBSPLK#0FFFFH,EVBIFRACLRCINTMRETEND