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ADuCM355 - Trigger Sequencer (or alternatively Measurement itself) with Push-Button

Category: Software
Product Number: AVAS104341
Software Version: Arm 9.30.1


I'm running the "M355_ECSns_SingleWE" and "-_DualWE" -Examples for the ADUCM355 on the EVAL-ADUCM355QSPZ-Board.

The basic structure of these two (and all other) Application-Examples from the ADUCM355 Git is like:

After starting the program/application, and all configuration-routines finished, the sequencer runs the according measurement endlessly via the sleep- and wakeup-timer-interrupts.

This process can only be interrupted by stopping the whole program/application.

I would like to use the "M355_GPIO" -Example from the DigitalDie examples and combine it with the examples mentioned above to apply the following changes:

- At start of the program, only the configuration routines get executed but the sequencer is not started automatically.

- Instead the program should enter an "idle-state" where it does nothing.

- Pressing the push button S2 on the EVAL-Board starts the sequencer (and so the measurement).

- After this, the sequencer is running (as in the standard version of the examples) and controls the measurement and all stuff (sendig data to UART etc.)

- Pressing the push button S3 on the EVAL-Board stops the sequencer after finishing the current measurement cycle.

- After this, the program goes back in the "idle-state" and pressing S2 can start the sequencer again and so on.

Would this changes be possible with a moderate amount of effort or would it be possible to build a complete new application ?

Many Greetings

  • I will try to precise my question, in the "Amperometric.c" file there ist this function:

    AD5940Err AppAMPCtrl(int32_t AmpCtrl, void *pPara)
      switch (AmpCtrl)
        case AMPCTRL_START:
          WUPTCfg_Type wupt_cfg;
          AD5940_ReadReg(REG_AFE_ADCDAT); /* Any SPI Operation can wakeup AFE */
          if(AppAmpCfg.AMPInited == bFALSE)
            return AD5940ERR_APPERROR;
          /* Start it */
          wupt_cfg.WuptEn = bTRUE;
          wupt_cfg.WuptEndSeq = WUPTENDSEQ_A;
          wupt_cfg.WuptOrder[0] = SEQID_0;
          wupt_cfg.SeqxSleepTime[SEQID_0] = 4-1;
          wupt_cfg.SeqxWakeupTime[SEQID_0] = (uint32_t)(AppAmpCfg.WuptClkFreq*AppAmpCfg.AmpODR)-4-1; 
          AppAmpCfg.FifoDataCount = 0;  /* restart */
        case AMPCTRL_STOPNOW:
          AD5940_ReadReg(REG_AFE_ADCDAT); /* Any SPI Operation can wakeup AFE */
          /* Start Wupt right now */
          AD5940_WUPTCtrl(bFALSE);  /* @todo is it sure this will stop Wupt? */
        case AMPCTRL_STOPSYNC:
          AppAmpCfg.StopRequired = bTRUE;
        case AMPCTRL_SHUTDOWN:
          AppAMPCtrl(AMPCTRL_STOPNOW, 0);  /* Stop the measurment if it's running. */
          /* Turn off LPloop related blocks which are not controlled automatically by sleep operation */
          AFERefCfg_Type aferef_cfg;
          LPLoopCfg_Type lp_loop;
          memset(&aferef_cfg, 0, sizeof(aferef_cfg));
          memset(&lp_loop, 0, sizeof(lp_loop));
          AD5940_EnterSleepS();  /* Enter Hibernate */
      return AD5940ERR_OK;

    In the standard application it gets called one times after initialization and before the while(1) loop with "AMPCTRL_START" Argument, to start the application.

    If i got things right to stop the application (the measurement) by a button press while staying able to restart it again at runtime (so start a new measurement without reset the program) I had to call this function again with the "AMPCTRL_STOPNOW" Argument right ?

    Could you eventually clarify what exactly is the difference between calling the function with the "AMPCTRL_STOPNOW", "AMPCTRL_STOPSYNC" and the "AMPCTRL_SHUTDOWN" argument ?


  • Hi,

      One simple way to implement the above is as below:

    void AD5940_Main(void)
    uint32_t temp;

    AppAMPCfg_Type *pAmpCfg;

    AD5940AMPStructInit(); /* Configure your parameters in this function */

    /* Initialise 2 EC sensors */
    AppECSnrInit(&pAmpCfg->SensorCh0, M355_CHAN0);

    AppAMPInit(AppBuff, APPBUFF_SIZE); /* Initialize application. Provide a buffer, which is used to store sequencer commands */
    while (AD5940_ReadReg(REG_AGPIO_GP0IN) == 0xA)
    AppAMPCtrl(AMPCTRL_START, 0); /* Control measurment to start. Second parameter has no meaning with this command. */

    /* Wait for data ready interrupt on internal GPIO pin */
    AD5940_ClrMCUIntFlag(); /* Clear this flag */
    AppAMPISR(AppBuff, &temp); /* Deal with it and provide a buffer to store data we got */
    AMPShowResult((float*)AppBuff, temp); /* Show the results to UART */
    /*Digital die sleep untill wakeup timer expires*/
    PwrCfg(ENUM_PMG_PWRMOD_HIBERNATE,MONITOR_VBAT_EN,0); //this line is all code for digital die entering hibernate

    if (AD5940_ReadReg(REG_AGPIO_GP0IN) == 0xB)


  • Hi,

    AMPCTRL_STOPNOW : Stop the wakeup timer asap.

    AMPCTRL_STOPSYNC: Stop the wake up timer after completing the current measurement sequence.

    AMPCTRL_SHUTDOWN: Stop the wake up timer asap, and Turn off LPloop related blocks.