Dallas CRC8 Routines

[CocaColaKid]

Tom,

I finally have everything working properly. Thank you so very much for your help and understanding.

[taats]

after a couple of hours of hard work, i got it working now...

so thanks anyway!!,

Taats

[CocaColaKid]

Is there an easier way to do this?

owin portb.7,0,[data_in[0], data_in[1], data_in[2], data_in[3], data_in[4], data_in[5], data_in[6], data_in[7], data_in[8]]

[Tom Estes]

Using other 1wire devices I have been able to do the following:

' Read the next 32 bytes, calculate running CRC but discard the bytes
For Index = 1 to 32
OWIn OWPort, 0, [CRCData]
GoSub CRC
Next Index
OWIn OWPort,0,[DesiredData]
CRCData = DesiredData
GoSub CRC

In other words there may be enough time in between data bytes sent from the 1 wire device to calculate the CRC on a running basis. If you don't need all the data the CRC can be calculated and the data discarded, retaining only that data you need.

[CocaColaKid]

I was wondering if that would actually work or not. This is my final line. Again thanks for all your help.

    for x = 0 to 8
    owin portb.7,0,[i]
    dq[x] = i
    next x