AD5941 Sequencer

Hi,

FIFO and sequencer settings cannot be configured inside a sequencer.

I was able to set the FIFO source within a sequence.  I modified the AD5940 Amperometric example to measure mean with one sequence and variance with another. 

/* Start sequence generator here for mean */
  AD5940_SEQGenCtrl(bTRUE); 
  AD5940_FIFOCtrlS(FIFOSRC_MEAN, bTRUE);  /* set source as mean */
  AD5940_SEQGpioCtrlS(AGPIO_Pin2);   /* sets this pin high ahead of conversion, others pulled low */
  AD5940_AFECtrlS(AFECTRL_ADCPWR|AFECTRL_SINC2NOTCH, bTRUE);
  AD5940_SEQGenInsert(SEQ_WAIT(16*250));    /* wait 250us */
  AD5940_AFECtrlS(AFECTRL_ADCCNV, bTRUE);   /* Start ADC convert*/
  AD5940_SEQGenInsert(SEQ_WAIT(WaitClks));  /* wait for first data ready */
  AD5940_AFECtrlS(AFECTRL_ADCPWR|AFECTRL_ADCCNV|AFECTRL_SINC2NOTCH, bFALSE);  /* Stop ADC */
  AD5940_SEQGpioCtrlS(0);    /* resets AGPIO_Pin2 following conversion */
  AD5940_EnterSleepS();/* Goto hibernate */
  /* Sequence end. */
  error = AD5940_SEQGenFetchSeq(&pSeqCmd, &SeqLen);
  AD5940_SEQGenCtrl(bFALSE); /* Stop sequencer generator */

Yes, I have tried and found it's able to change the fifo source. How about disable fifo first and enable it later to clear fifo.

Hi,

Data and command FIFO need to be configured outside sequence to avoid racing condition.

FIFOCfg_Type fifo_cfg;

fifo_cfg.FIFOEn = bFALSE;
fifo_cfg.FIFOMode = FIFOMODE_FIFO;
fifo_cfg.FIFOSize = FIFOSIZE_4KB; /* 4kB for FIFO, The reset 2kB for sequencer */
fifo_cfg.FIFOSrc = FIFOSRC_DFT;
fifo_cfg.FIFOThresh = 4;
AD5940_FIFOCfg(&fifo_cfg); /* Disable to reset FIFO. */
fifo_cfg.FIFOEn = bTRUE;
AD5940_FIFOCfg(&fifo_cfg);