Analogdicovery2 + Pmod TC1

[yohara33]

Hi. I'm high school physics teacher and I use analogdiscovery2 in my physics experiments as voltometers, osciloscopes, DC power sources and so on. Analogdicovery2 is incredible device so that students can measure many kind of physical properties by only one device! Now I'm wondering if students can measure temperature by means of Pmod TC1 with Analogdiscovery2 without coding? If it is possible, how can I do that? Thanks.

[attila]

Hi @yohara33

I could add example script for Pmod TC1 to Protocol and Script tools, just like we have for some other Pmods.
With this, the example only needs to be clicked and executed.

[yohara33]

Thank you attila! This seems fine for me, but I need more help. Where can I get example script for Pmod TC1 for SPI and how to add it into Waveforms? Thanks.

[attila]

Hi @yohara33

The following Script should work.
You may have to adjust the thermocouple temperature conversion, the "*0.25+0.0"

if(!('Protocol' in this)) open("Protocol")
Protocol.Mode.text = "SPI"

print("Chip temperature, thermocouple temperature, eventual faults")

while(wait(1)){ // wait 1 second
    Protocol.SPI.Start()
    var bits = Protocol.SPI.Read(32, 1) // read 32 bits
    Protocol.SPI.Stop()

    var chip = ((bits<<16)>>20)*0.0625 // chip temperature, two's comp
    var temp = (bits>>18)*0.25+0.0 // thermocouple with .25*C resolution, two's comp

    var text = "Chip: "+chip+"*C\tThermo: "+temp+"*C\t"
    if(bits&0x10000 || bits&7){
        text += "Fault:"
        if(bits&4) text += " SCV"
        if(bits&2) text += " SCG"
        if(bits&1) text += " OC"
    }
    print(text)
}