• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 82 subscribers
  • Views 736 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADC SEQ2 doesn't work. [ F28335 / Dual Sequencer Mode ]

Sh.Sasaki
Guru 13625 points

Hi,

I have a question about F28335's ADC.

My device setting is following.
- Simultaneous Sampling
- Dual Sequencer Mode
- ADC trigger is SOCA & SOCB of ePWM1

Now, Sequencer2(SEQ2) doesn't work.

ETFLG->SOCA & SOCB is set. But SEQ2 isn't triggered.

My program is following.

Please let me know when you find out about it.

--------------------------------------------------------------------------------------------

InitAdc(); // For this example, init the ADC

AdcRegs.ADCTRL2.bit.RST_SEQ1 = 0x1;
AdcRegs.ADCTRL2.bit.RST_SEQ2 = 0x1;

/* ADC Config */
AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK;
AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS;
AdcRegs.ADCTRL1.bit.SEQ_CASC = 0;
AdcRegs.ADCTRL3.bit.SMODE_SEL = 1;
AdcRegs.ADCTRL1.bit.CONT_RUN = 1;
AdcRegs.ADCTRL1.bit.SEQ_OVRD = 0;
AdcRegs.ADCTRL2.bit.SOC_SEQ1 = 1;
AdcRegs.ADCTRL2.bit.SOC_SEQ2 = 1;

/* SEQ1 Config */
AdcRegs.ADCTRL2.bit.EPWM_SOCA_SEQ1 = 1;
AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1;
AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0;
AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0;
AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 0;
AdcRegs.ADCCHSELSEQ1.bit.CONV03 = 0;
AdcRegs.ADCMAXCONV.bit.MAX_CONV1 = 3;

/* SEQ2 Config */
AdcRegs.ADCTRL2.bit.EPWM_SOCB_SEQ2 = 1;
AdcRegs.ADCCHSELSEQ3.bit.CONV08 = 0;
AdcRegs.ADCCHSELSEQ3.bit.CONV09 = 0;
AdcRegs.ADCCHSELSEQ3.bit.CONV10 = 0;
AdcRegs.ADCCHSELSEQ3.bit.CONV11 = 0;
AdcRegs.ADCMAXCONV.bit.MAX_CONV2 = 3;

// Assumes ePWM1 clock is already enabled in InitSysCtrl();
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 4; // Select SOC from from CPMA on upcount

EPwm1Regs.ETSEL.bit.SOCBEN = 1; // Enable SOC on B group
EPwm1Regs.ETSEL.bit.SOCBSEL = 4; // Select SOC from from CPMA on upcount

EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate SOCA pulse on 1st event
EPwm1Regs.ETPS.bit.SOCBPRD = 1; // Generate SOCB pulse on 1st event
EPwm1Regs.CMPA.half.CMPA = 0x0080; // Set compare A value
EPwm1Regs.TBPRD = 0xFFFF; // Set period for ePWM1
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // count up and start

------------------------------------------------------------------------

Best regards,

FSSer

  • 0
    Guru 192875 points

    Hi FSSer,

    The above ADC configuration seems to be incorrect.

    Try this: Simply replace the above code with the one attached below

     // Configure ADC
      AdcRegs.ADCMAXCONV.all = 0x0005;       // Setup 3 conv's on SEQ1
      AdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0; // Setup ADCINA0 as 1st SEQ1 conv.			
      AdcRegs.ADCCHSELSEQ1.bit.CONV01 = 0x1; // Setup ADCINA1 as 2nd SEQ1 conv.			
      AdcRegs.ADCCHSELSEQ1.bit.CONV02 = 0x2; // Setup ADCINA2 as 3rd SEQ1 conv.			
      AdcRegs.ADCCHSELSEQ1.bit.CONV03 = 0x3; // Setup ADCINA3 as 4th SEQ1 conv.			
      AdcRegs.ADCCHSELSEQ2.bit.CONV04 = 0x4; // Setup ADCINA4 as 1st SEQ2 conv.			
      AdcRegs.ADCCHSELSEQ2.bit.CONV05 = 0x5; // Setup ADCINA5 as 2nd SEQ2 conv.			
      AdcRegs.ADCCHSELSEQ2.bit.CONV06 = 0x6; // Setup ADCINA6 as 2nd SEQ2 conv.			


     AdcRegs.ADCTRL2.bit.EPWM_SOCA_SEQ1 = 1;// Enable SOCA from ePWM to start SEQ1
     AdcRegs.ADCTRL2.bit.INT_ENA_SEQ1 = 1;  // Enable SEQ1 interrupt (every EOS)
     AdcRegs.ADCTRL2.bit.EPWM_SOCB_SEQ2 = 1;// Enable SOCB from ePWM to start SEQ2
     AdcRegs.ADCTRL2.bit.INT_ENA_SEQ2 = 1;  // Enable SEQ2 interrupt (every EOS)

    Also, you can select any ADC channel as per your requirement. Mine above is from ADC0-6.

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Guru 13625 points

    Hi Gautam,

    Thank you for your reply.

    But still does not work.

    Please teach us about the following.

    In the description of ADC RG(spru812a) Dual Sequencer Mode : 

    SEQ1 is CONV00~CONV07
    SEQ2 is CONV08~CONV15

    and,

    Example 1-1. Simultaneous Sampling Dual Sequencer Mode Example is : 18page

    I have programmed it to the reference.

    This is correct ?   --->  SEQ1 = CONV00~CONV0 & SEQ2 = CONV08~CONV15 in Dual Sequencer Mode.

    Regards,

    FSSer

  • 0 in reply to Sh.Sasaki
    Guru 13625 points

    Now, My program is working properly after  I modfied ADCTRL1.bit.CONT_RUN = 0.

    This thread I will close.

    Thanks & regards,

    FSSer

  • 0 in reply to Sh.Sasaki
    Guru 192875 points
    That's Great FSSer!

    Goodluck & Regards,
    Gautam