PSoC™ 5, 3 & 1 Forum Discussions

Hello All,

Has anyone been able to successfully measure the Max voltage of a sine wave?

I am routing my analog wave through a PGA before inputting into the ADCINCVR. The Clock frequency is set to 2Mhz, the CPU is set to 12Mhz. The input wave is 3Vpp @ 3840Hz with a DC bias of 1V.

    while(1){
        if(ADCINCVR_1_fIsDataAvailable()){                // check flag to see if last conversion is complete
            ADCcount[0] = ADCINCVR_1_iGetDataClearFlag();    // read sample from the ADC    
            break;
        }
    }
    ADCcount[0] = 0;
    loopCount=0;
    while (loopCount<20){
            PRT2DR|=IO_TEST;  //DRIVE P2[0] HIGH
            ADCcount[loopCount]=ADCINCVR_1_iGetData();
            loopCount++;
            PRT2DR &= ~IO_TEST;  //DRIVE P2[0] LOW 
    }

After taking the 20 samples, I am looking for the highest value in the array.

The problem I am running into is that I can only recover the DC offset portion of the wave.

To verify the sampling frequency is sufficent, I put an o-scope on the input wave and output of PRT2DR.  I am able to see that sample is being taken at various portions of the sine wave.

Any Ideas?

Vlad

state_var is only available in main loop. Nowhere else this value is neither read nor written.
How it's possible, that in case statement case 7:
value on exit is negative?

in assemble there are 3 instructions related to increament state_var.

However it's not rtos but a simple single thread aplication, mainly for problem isolation.

Should I disable breakpoints during increment/decrement which do not play with this variable at all?

 Hello all,

my design holds microSD card (working with emfile) and Serial RAM (connected to the same SPI lines as microSD card).

My question is how can I assign same pins to both emfile and SPI Master?

Whenever I set pins for emfile (in Pin Editor), pins for SPI Master get deselected and vice versa. Is there something basic that I am missing?

Regards

 Hello!

I was using a chip AXI-060 (PSoC 5 architecture I think) before and was getting readings from some analog sensors (pressure transducers). Those readings were pretty accurate. I am now working with a 5 LP-032 chip, and I just notice that, even if I'm using the same code as on the AXI-060, those readings are completely different. I get a reading in mV that is about 3 times less than what I was getting with the old chip.

This is pretty scary. Any idea of what would cause that? Is the ADC different in PSoC 5 and PSoC 5LP?

Thank you.

 In thermocouple example Thermocouple_GetVoltage() API accept temperature range maximum of 100 Degree. 

But how can i modify that API for Full temperature range for any thermocouple.??