2833ADC 双排序器Start/Stop模式-TI中文支持网

有个问题！

关于28335ADC的 Sequencer Start/Stop模式，在TI28335 ADC 参考手册第22页，如下图：

代码初始化：

1. eWPM1计数器工作在up-down模式；

2. CTR=0时，产生ePWM1SOCA触发AD排序器1采样转换I1,I2,I3这三个通道；

3. CTR=PRD时，产生ePWM1SOCB触发AD排序器2采样转换V1,V2,V3这三个通道；

但为什么转换的结果只有I1,I2,I3这三个通道转换成功了，而V1,V2,V3折三个通道始终值为0。

请问大家使用过这种模式吗？

麻烦大家给指导指导吧！！

测试代码如下：

附件中是源文件！

#include "DSP2833x_Device.h" // DSP2833x Headerfile Include File

#include "DSP2833x_Examples.h" // DSP2833x Examples Include File

// Prototype statements for functions found within this file.

interrupt void adc_isr(void);

Uint16 VoltageA[3];

Uint16 VoltageB[3];

Uint16 upDownFlag = 0;

Uint16 PWMDuty = 0;

void main(void)

{

InitSysCtrl();

DINT;

InitPieCtrl();

IER = 0x0000;

IFR = 0x0000;

InitPieVectTable();

InitEPwm1Gpio(); //PWM outPin≥ı ºªØ

EALLOW;

GpioCtrlRegs.GPAMUX1.bit.GPIO7 = 0; // GPIO0∏¥”√Œ™GPIOπ¶ƒ‹

GpioCtrlRegs.GPADIR.bit.GPIO7 = 1; // GPIO0…Ë÷√Œ™ ‰≥ˆ

PieVectTable.ADCINT = &adc_isr;//ADC interrupt

PieVectTable.EPWM1_INT = &EPWM1_INT_ISR; //ePWM1 zero interrupt

EDIS;

AdcRegs.ADCTRL1.all = 0;

AdcRegs.ADCTRL2.all = 0;

AdcRegs.ADCTRL3.all = 0;

//config ADC

AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1;

AdcRegs.ADCTRL2.bit.RST_SEQ2 = 1;

AdcRegs.ADCTRL1.bit.ACQ_PS = 3;

AdcRegs.ADCTRL1.bit.SEQ_CASC = 0;//0:À´≈≈–Ú∆˜ƒ£ Ω£ª1£∫º∂¡™≈≈–Úƒ£ Ω

AdcRegs.ADCTRL3.bit.SMODE_SEL = 0;//0:¡¨–¯≤…—˘£ª1£∫Õ¨≤Ω≤…—˘ƒ£ Ω

AdcRegs.ADCTRL1.bit.CONT_RUN = 0;//0£∫∆Ù∂Ø/Õ£÷πƒ£ Ω£ª1:¡¨–¯ƒ£ Ω

AdcRegs.ADCTRL1.bit.SEQ_OVRD = 0;

//config SEQ1

AdcRegs.ADCTRL2.bit.SOC_SEQ1 = 1;

AdcRegs.ADCTRL2.bit.EPWM_SOCA_SEQ1 = 1;

AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1;

AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x00;

AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x01;

AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 0x02;

AdcRegs.ADCMAXCONV.all = 0x22;

//config SEQ2

AdcRegs.ADCTRL2.bit.SOC_SEQ2 = 1;

AdcRegs.ADCTRL2.bit.EPWM_SOCB_SEQ2 = 1;

AdcRegs.ADCTRL2.bit.INT_ENA_SEQ2 = 1;

AdcRegs.ADCCHSELSEQ3.bit.CONV08 = 0x08;

AdcRegs.ADCCHSELSEQ3.bit.CONV09 = 0x09;

AdcRegs.ADCCHSELSEQ3.bit.CONV10 = 0x0A;

// AdcRegs.ADCMAXCONV.bit.MAX_CONV2 = 0x2;

extern void DSP28x_usDelay(Uint32 Count);

AdcRegs.ADCTRL3.all |= 0x00E0; // Power up bandgap/reference/ADC circuits

DELAY_US(5000L); // Delay before converting ADC channels

/*ePWM config*/

EPwm1Regs.TBPRD = 6000; // ±ª˘º∆ ˝÷‹∆⁄

EPwm1Regs.CMPA.half.CMPA = 1500; //º∆ ˝±»Ωœºƒ¥Ê∆˜A

EPwm1Regs.TBPHS.all = 0;// ±ª˘Õ¨≤Ωœ‡Œª

EPwm1Regs.TBCTR = 0;// ±ª˘º∆ ˝∆˜≥ı º÷µ

EPwm1Regs.TBCTL.bit.PHSDIR = TB_UP;//œ‡Œª∑ΩœÚøÿ÷∆ºƒ¥Ê∆˜£¨µ±Õ¨≤Ω–≈∫≈¿¥ ±£¨◊∞‘ÿ¡Àœ‡Œªºƒ¥Ê∆˜µƒ÷µ∫Û «œÚ…œº∆ ˝ªπ «œÚœ¬º∆ ˝

EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO; //œ‡ŒªÕ¨≤Ω–≈∫≈‘¥—°‘Ò£¨µ±CTR=ZERO ± ‰≥ˆÕ¨≤Ω–≈∫≈

EPwm1Regs.TBCTL.bit.PHSEN = TB_ENABLE;//µ±Õ¨≤Ω–≈∫≈¿¥ ±£¨øÿ÷∆ «∑Ò◊∞‘ÿœ‡Œªºƒ¥Ê∆˜µƒ÷µ–µ±Õ¨≤Ω–≈∫≈¿¥ ±£¨º∆ ˝ºƒ¥Ê∆˜◊∞‘ÿœ‡Œªºƒ¥Ê∆˜µƒ÷µ

EPwm1Regs.TBCTL.bit.PRDLD = TB_IMMEDIATE; //Ω˚÷π π”√”∞◊”ºƒ¥Ê∆˜

EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; //º∆ ˝ƒ£ Ωøÿ÷∆ºƒ¥Ê∆˜:up; down; up-down;stop

EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; //∏ﬂÀŸ ±ª˘ ±÷”∑÷∆µ

EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1;// ±ª˘ ±÷”∑÷∆µ

EPwm1Regs.DBCTL.bit.IN_MODE = DBA_ALL;//À¿«¯ƒ£øÈ ‰»Î‘¥øÿ÷∆£¨Ω´ePWM3A◊˜Œ™À´±ﬂ—ÿ—” ± ‰»Î‘¥

EPwm1Regs.DBCTL.bit.POLSEL = DB_ACTV_HIC; //À¿«¯º´–‘—°‘Òøÿ÷∆£¨ePWM3A≤ª∑≠◊™£¨ePWM3B∑≠◊™

EPwm1Regs.DBCTL.bit.OUT_MODE = DB_FULL_ENABLE;

EPwm1Regs.DBRED = 100;//À¿«¯…œ…˝—ÿ—” ±ºƒ¥Ê∆˜

EPwm1Regs.DBFED = 100;//À¿«¯œ¬Ωµ—ÿ—” ±ºƒ¥Ê∆˜

EPwm1Regs.AQCTLA.bit.ZRO = AQ_CLEAR; //µ± ±ª˘º∆ ˝∆˜µƒ÷µµ»”⁄0 ±£¨ePWM3A ‰≥ˆµÕ

EPwm1Regs.AQCTLA.bit.CAU = AQ_SET;//µ± ±ª˘º∆ ˝∆˜œÚ…œº∆ ˝£¨≤¢«“ ±ª˘º∆ ˝∆˜µƒ÷µ”ÎCMPAºƒ¥Ê∆˜µƒ÷µœ‡µ» ±£¨ePWMA ‰≥ˆ∏ﬂ

EPwm1Regs.AQCTLA.bit.CAD = AQ_CLEAR;//µ± ±ª˘º∆ ˝∆˜œÚœ¬º∆ ˝£¨≤¢«“ ±ª˘º∆ ˝∆˜µƒ÷µ”ÎCMPAºƒ¥Ê∆˜µƒ÷µœ‡µ» ±£¨eWPMA ‰≥ˆµÕ

EPwm1Regs.ETSEL.bit.SOCASEL = ET_CTR_PRD; //ePWMxSOCA¥•∑¢–≈∫≈≤˙…˙Ãıº˛£¨µ±CTR=0 ±≤˙…˙÷–∂œ¥•∑¢

EPwm1Regs.ETSEL.bit.SOCAEN = 0x1;// πƒ‹ePWMxSOCA–≈∫≈≤˙…˙

EPwm1Regs.ETSEL.bit.SOCBEN = 0x1;// πƒ‹ePWMxSOCB–≈∫≈≤˙…˙

EPwm1Regs.ETSEL.bit.SOCBSEL = ET_CTR_ZERO; //ePWMxSOCB¥•∑¢–≈∫≈≤˙…˙Ãıº˛£¨µ±CTR=PRD ±≤˙…˙÷–∂œ¥•∑¢

EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO; //ePWM÷–∂œÃıº˛—°‘Ò

EPwm1Regs.ETSEL.bit.INTEN = 0x1;// πƒ‹ePWM÷–∂œ

EPwm1Regs.ETPS.bit.SOCACNT = 0x1;//∂‘≤˙…˙ePWMxSOCAÃıº˛ ¬º˛º∆ ˝£¨”–1¥Œ ¬º˛∑¢…˙ ±

EPwm1Regs.ETPS.bit.SOCAPRD = 0x1;//ePWMxSOCA–≈∫≈≤˙…˙Ãıº˛£¨‘⁄µ⁄1∏ˆ ¬º˛ ±£¨≤˙…˙SOC–≈∫≈

EPwm1Regs.ETPS.bit.SOCBCNT = 0x1;//∂‘≤˙…˙ePWMxSOCBÃıº˛ ¬º˛º∆ ˝£¨”–1¥Œ ¬º˛∑¢…˙ ±

EPwm1Regs.ETPS.bit.SOCBPRD = 0x1;//ePWMxSOCB–≈∫≈≤˙…˙Ãıº˛£¨‘⁄µ⁄1∏ˆ ¬º˛ ±£¨≤˙…˙SOC–≈∫≈

EPwm1Regs.ETPS.bit.INTCNT = 0x1;//∂‘ePWM÷–∂œ ¬º˛º∆ ˝

EPwm1Regs.ETPS.bit.INTPRD = 0x1;//÷–∂œ≤˙…˙Ãıº˛…Ë÷√£¨µ±INTCNT º∆ ˝µ»”⁄1 ±£¨≤˙…˙÷–∂œ

EPwm1Regs.ETCLR.bit.INT = 0x1;//«Â≥˝÷–∂œ±Í÷æŒª

EPwm1Regs.ETCLR.bit.SOCA = 0x1;//«Â≥˝SOCA±Í÷æŒª

EPwm1Regs.ETCLR.bit.SOCB = 0x1;

//enable Interrupt

PieCtrlRegs.PIECTRL.bit.ENPIE = 1; //vector enable

PieCtrlRegs.PIEIER1.bit.INTx6 = 1; //enable adc

PieCtrlRegs.PIEIER3.bit.INTx1 = 1; //enable ePWM1 zero interrupt

IER |= M_INT1;

IER |= M_INT3;

EINT; // ◊‹÷–∂œ INTM πƒ‹

ERTM; // πƒ‹◊‹ µ ±÷–∂œ DBGM

while(1)

{

DELAY_US(1000);

}

interrupt void adc_isr(void)

{

GpioDataRegs.GPADAT.bit.GPIO7 = 1;

// Insert ISR Code here

VoltageA[0] = AdcRegs.ADCRESULT0 >>4;

VoltageA[1] = AdcRegs.ADCRESULT1 >>4;

VoltageA[2] = AdcRegs.ADCRESULT2 >>4;

VoltageB[0] = AdcRegs.ADCRESULT3 >>4;

VoltageB[1] = AdcRegs.ADCRESULT4 >>4;

VoltageB[2] = AdcRegs.ADCRESULT5 >>4;

AdcRegs.ADCTRL2.bit.RST_SEQ1 = 1; // Reset SEQ1

AdcRegs.ADCTRL2.bit.RST_SEQ2 = 1; // Reset SEQ1

AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1; // Clear INT SEQ1 bit

AdcRegs.ADCST.bit.INT_SEQ2_CLR = 1; // Clear INT SEQ1 bit

PieCtrlRegs.PIEACK.all = PIEACK_GROUP1; // Acknowledge interrupt to PIE

GpioDataRegs.GPADAT.bit.GPIO7 = 0;

}

Linda：

您好!

请到以下网址下载controlSUITE:

www.ti.com/controlsuite

(选择offline ZIP installer)

安装后可以在以下目录下找到F28335的例程:

C:\ti\controlSUITE\device_support\f2833x\v142\DSP2833x_examples_ccsv5

可以参考其中adc_开头的例程中的设置.