TMSF28335程序设计实例解析.pdf

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1、TMSF28335 程序设计实例实现功能:AD 采样+PI 调节+一阶惯性head file#include DSP2833x_Device.h#in clude DSP2833x_Examples.hmacro#defi ne S1 AdcRegs.ADCST.bit.lNT_SEQ1/*globa|variable floatthis_zl;float upon _zl;int Pln=0;/symbol parameterint SCn=0;/symbol parameterfloat adclo=0;/AD refere need voltagefloat adcres=65536;f

2、loat Ta;一阶系统时间常数float temp=0.950213;int sc_D;float mf_scz;float mf_sc;/output*mai nfunction*un sig ned int*Sda;float power_set;float power_get;/actual output voltagefloat KP_wr;/PI proporti on coefficie ntfloat KI_wr;/PI in tegral coefficie ntfloat error_sg;/PI correlative parameterfloat error_1;flo

3、at error_2;fun ctionin terrupt void cpu_timerO_isr(void;in terrupt void ad_i sr(void;void Ini t_TimerO(void;void Ini t_Xi ntf(void;void Init_Gpio(void;/GPIO initialization program void Initadc(void;/AD initializefloat PI_T(float power_sd,float pow_i n;/PI con trol fun ctio nvoid delay_ys(void;/delay

4、 subprogramvoid ma in(voidun sig ned int*Sda=(u nsig ned int*0 x200000;/define DA address,XINTFZone7 InitSysCtrl(;/initialize system subprogramIni t_Timer0(;DINT;In itPieCtrl(;IER=0 x0000;IFR=0 x0000;In itPieVectTable(;In it_Gpio(;In itadc(;In it_Xi ntf(;CpuTimer0Regs.TCR.bit.TIE=1;EALLOW;/解除寄存器保护Pi

5、eVectTable.TINT0=&cpu_timer0_isr;/用 CUP_Timer0 中断函数入口更新/PIE 向量表PieVectTable.ADCINT=&adsr;/用 AD 中断函数更新 PIE 向量表EDIS;/使能寄存器保护Con figCpuTimer(&CpuTimer0,150,500;/timi ng 500usStartCpuTimer0(;PieCtrlRegs.PIEIER1.all=0 x60;使能 PIE 内的 CUP_TimerO 和 AD中断IER|=OxOOO1;/使能 CPU INT 1EINT;*in itializationCPU timer*

6、void In it_Timer0(voidCpuTimer0Regs.PRD.all=75000;/set timer period timi ng:500usCpuTimerORegs.TPR.all=O;CpuTimerORegs.TPRH.all=O;CpuTimer0Regs.TCR.bit.TSS=1;/stop timer*A/D|；re*；n*void In itadc(voidlong i;/AD in itializeAdcRegs.ADCTRL1.bit.RESET=1;for(i=0;i100;i+;AdcRegs.ADCTRL1.bit.RESET=0;AdcRegs

7、.ADCTRL1.bit.SUSMOD=0;AdcRegs.ADCTRL1.bit.ACQ_PS=0;/sett ing sample win dowAdcRegs.ADCTRL1.bit.CPS=0;AdcRegs.ADCTRL1.bit.CONT_RUN=0;/启动-停止模式AdcRegs.ADCTRL1.bit.SEQ_CASC=0;/AdcRegs.ADCTRL3.bit.ADCBGRFDN=3;/给 ADC 模块的内部基准电路上电for(i=0;i400000;i+;/delay more than 7msAdcRegs.ADCTRL3.bit.ADCPWDN=1;/给 ADC 模块

8、的其余模拟电路上电for(i=0;i10000;i+;/delay more than 20usAdcRegs.ADCTRL3.bit.ADCCLKPS=10;AdcRegs.ADCTRL3.bit.SMODE_SEL=0;/choose sample styleAdcRegs.ADCMAXCONV.all=0 x0000;AdcRegs.ADCCHSELSEQ1.bit.CONV00=0 x0000;AdcRegs.ADCST.bit.lNT_SEQ1_CLR=1;AdcRegs.ADCTRL2.bit.RST_SEQ1=1;/复位排序器 1AdcRegs.ADCTRL2.bit.lNT_E

9、NA_SEQ 仁 1;/SEQ1 in terruptAdcRegs.ADCTRL2.bit.lNT_M0D_SEQ 仁 0;/choose in terrupt stylein itializatio*void Ini t_Xin*external peripheralsntf(voidEALLOW;Xin tfRegs.XINTCNF2.bit.XTIMCLK=1;Xin tfRegs.XTIMING6.bit.XWRLEAD=3;Xin tfRegs.XTIMING6.bit.XWRACTIVE=7;Xin tfRegs.XTIMING6.bit.XWRTRAIL=3;Xin tfReg

10、s.XTIMING6.bit.XRDLEAD=3;Xin tfRegs.XTIMING6.bit.XRDACTIVE=7;Xin tfRegs.XTIMING6.bit.XRDTRAIL=3;Xin tfRegs.XTIMING6.bit.X2TIMING=0;Xin tfRegs.XTIMING6.bit.USEREADY=0;Xin tfRegs.XTIMING6.bit.XSIZE=3;EDIS;*in itializatio n*void Ini t_Gpio(voidEALLOW;/GPIO in itializeGpioCtrlRegs.GPBMUX1.all=0 xFFFFFC0

11、0;/设置 B 口为地址线以及 DAC 片选信号 GpioCtrlRegs.GPCMUX1.all=0 xFFFFFFFF;/set C Port as date addressGpioCtrlRegs.GPAMUX1.all=0 x0000;GpioCtrlRegs.GPADIR.all=0 x0003;GpioDataRegs.GPADA T.all=0 x0003;GpioDataRegs.GPACLEAR.all=0 x0003;/choose GPIO1,2 as DA sig nal addressEDIS;*PIfun cti*portal parameter:power_sdo

12、nand pow_i nexport parameter:this_zlfloat PI_T(float power_sd,float power_i nerror_1=error_sg;error_sg=power_sd-power_i n;error_2=error_sg-error_1;if(Pln=0error_2=4.0;/avoid error_2 too largePin+;this_zl=KP_wr*error_sg+Kl_wr*error_2;error_sg=error_1;return this_zl;*Delayfun cti*void delay_ys(voidonl

13、ong i;for(i=0;i100000;i+;*timer 0 in terrupt dealfun cti*onin terrupt void cpu_timer0_isr(voidDINT;StopCpuTimerO(;CpuTimerORegs.TCR.bit.TIF=1;清 CPU 定时器 0 的中断标志PieCtrIRegs.PIEACK.all|=OxOOO1;使能第一组中断以使 AD 产生的中断能/被 CPU 响应AdcRegs.ADCTRL2.bit.SOC_SEQ 仁 1;使能排序器，启动 AD 转换EINT;while(S 仁=0;/等待 AD 转换的完成delay_y

14、s(;*fun ction*AD in terrupt*in terrupt void ad_isr(voidDINT;AdcRegs.ADCTRL2.bit.RST_SEQ 仁 1;power_get=(floatAdcRegs.ADCRESULT0*3.0/adcres+adclo;/X 寸采样数据进行转换if(SC n=0 mf_scz=2.5;SCn+;mf_sc=mf_scz;upon_zl=PI_T(power_get,mf_sc;调用 PI 环节的函数mf_sc=1/Ta*upon_zl*temp;/通过一阶惯性环节的处理delay_ys(;mf_scz=mf_sc;sc_D=(i nt(mf_sc*4096/5;*(Sda=sc_D;写数据到 DA 的数据线AdcRegs.ADCST.bit.lNT_SEQ1_CLR=1;PieCtrIRegs.PIEACK.all|=0 x0001;使能第一组中断EINT;StartCpuTimer0(;启动定时器 0,开始下一次采样