Convert Digital Bus to an Integer value - Calculator Viva

FYI,  i failed to get either of the suggestions in the following solution to work:

How to get the decimal value of a digital bus at a given time point

Hi Faisal,

 Can you give more details of what went wrong trying the above solution? I just tried using expr numConv(value(VT("a<0:3>") 400n ) "dec" t) and it works fine for me. 

How your expression looks like and what kind of error you get if any? If it's an eval error you can probably do RMB->Job Log to get more details.

Regards,

Dimitra

Hi Dimitra,

i modified your expression to the following = numConv(value(VT("/vin<0:3>") 0) "dec" t)

i get the following output in CIW =

expression evaluation failed: val is not legal.
expression evaluation failed: numConv(value(VT("/vin<0:3>") 0) "dec" t)
("Exception" 1 t nil ("*Error* Exception: SKILL ERROR" nil))

FYI, 

the value() returns correctly but the numConv does NOT.

also im using the 617 with latest hotfixes

Hi Faisal,

 What value(VT("/vin<0:3>") 0) returns?

Regards,

Dimitra

Hi Dimitra,

it returns a list of analog values for each bit

vin<0> 0

vin<1> 1.2

etc ..

Faisal,

That's because your bus is an analog bus. If I convert it to digital, it works for me:

numConv(value(awvCreateBus("opBus" list(awvAnalog2Digital(leafValue(VT("/op<5:0>") "bit" "/op<5>") nil nil 0.6 nil "centre") awvAnalog2Digital(leafValue(VT("/op<5:0>") "bit" "/op<4>") nil nil 0.6 nil "centre") awvAnalog2Digital(leafValue(VT("/op<5:0>") "bit" "/op<3>") nil nil 0.6 nil "centre") awvAnalog2Digital(leafValue(VT("/op<5:0>") "bit" "/op<2>") nil nil 0.6 nil "centre") awvAnalog2Digital(leafValue(VT("/op<5:0>") "bit" "/op<1>") nil nil 0.6 nil "centre") awvAnalog2Digital(leafValue(VT("/op<5:0>") "bit" "/op<0>") nil nil 0.6 nil "centre") ) "Binary") 0) "dec" t)

The expression is a bit like War and Peace because it needs to take the analog bus, pull out the individual member (using leafValue) for each bit, and then use awvAnalog2Digital to convert it into a digital bus. I then find the value of this at time 0, and then use numConv to convert to decimal. For me I used bussetp and set the bus to 23 and the above expression also gives me 23.

I didn't write the above expression by hand. I plotted VT("/op<5:0>") and then selected the 6 member bits in the graph, and did Measurements->Analog to Digital, set my threshold, made sure the bits are in the right order, and said I wanted to make a bus. Then having done that, I selected the digital bus and sent it to the calculator and used value and numConv on the result.

Regards,

Andrew.

Good morning Andrew,

thanks for the thorough feedback.as always much appreciated.

we encounter this scenario often, and i think we would really benefit from this being a custom calculator defined function.

Any chance you have some bandwidth to help me with this ?

Cheers,

Faisal

Ps.

value(analog2Digital(VT("/vin<8:0>") "center" ?vCenter (VAR("vdd12") / 2)) 0)  "dec" t) 0) 

returns the correct binary list. If there was a way to convert this list into a string, couldnt we pass the string to numConv() ?

Hi Faisal,

I'll try to find some time to do this. The value function you show above seems to give a waveform with the x-axis being the bit, so it's not quite what you want. Anyway, I'll think about it - hopefully I'll have a bit of time in the next week or so.

Andrew. 

Hi Faisal,

I had a few minutes on a plane yesterday (I know how to have fun!), so I threw this together. It needs the code from this post too (I made life easier for myself by reusing some of that code).

To use it, use the "fx" button in the calculator function panel and navigate to the file - it will add the calculator UI too which works just like analog2Digital. See the comments at the top for an example usage.

/* abA2DBus.il

Author     A.D.Beckett
Group      Custom IC (UK), Cadence Design Systems Ltd.
Language   SKILL
Date       Jun 20, 2018 
Modified   May 13, 2023 
By         A.D.Beckett

Function to convert an analog bus to a digital bus. For example:

numConv(value(abA2DBus(VT("/op<5:0>")  "center" ?vCenter 0.6) 0 ) "dec" t)

Outputs the decimal value of the bus at time 0.

Can be installed in the calculator using the fx button in the function
panel, or the + button in the expresson builder

***************************************************

SCCS Info: @(#) abA2DBus.il 05/13/23.15:29:40 1.2

*/

/*********************************************************************
*                                                                    *
* abA2DBus(analogBus thresholdType [?radix radix] [?vCenter vCenter] *
*              [?vHigh vHigh] [?vLow  vlow] [?timeX 1])              *
*                                                                    *
*  Function similar to analog2Digital except will work on an analog  *
*                   bus and return a digital bus.                    *
*                                                                    *
*********************************************************************/

procedure(abA2DBus(analogBus @key (radix "Hex") @rest args)
    awvCreateBus(
        "Bus"
        apply('analog2Digital
            abUnwrapFamily(analogBus)~>wave
            args
        )
        radix
    )
)

;;;;;;;;;;;;;;;;;;;;;;;;;; GUI builder information ;;;;;;;;;;;;;;;;;;;;;;;;;;;
ocnmRegGUIBuilder(
  '(nil
    function abA2DBus
    name abA2DBus
    description "Returns the digital form of an analog bus waveform"
    category ("Custom Functions")
    analysis (nil
              general  (nil
                   format ("abA2DBus(%s %s)" signal thresholdType)
                   signals (nil
                            signal (nil
                                    prompt "Waveform"
                                    tooltip "Input waveform"
                                    )
                   )
                   params (nil
                           radix (nil
                                     prompt "Radix"
                                     tooltip "The radix of the bus"
                                     default "Hex"
                                     required t
                                     keyed t
                                     guiRowHint 1
                                     type ("Hex" "Octal" "Binary" "Ascii" "Signed Decimal" "Unsigned Decimal")
                                     )
                           thresholdType (nil
                                     prompt "Logic Threshold"
                                     tooltip "Logic Threshold."
                                     required t
                                     default "hilo"
                                     type (("hilo" (" \"hilo\" ?radix %s ?vHigh %s ?vLow %s ?timeX %s" radix vHigh vLow timeX)) 
                                         ("center" (" \"center\" ?radix %s ?vCenter %s" radix vCenter)))
                                     guiRowHint 2
                                     guiEnableHint ((vHigh "hilo") (vLow "hilo") (timeX "hilo") (vCenter "center"))
                                     )
                          vHigh (nil
                                     prompt "Voltage High/Low"
                                     tooltip "Any value higher than this is high state."
                                     default nil
                                     guiRowHint 3
                                     required nil
                                     keyed t
                                     type float)
                           vLow (nil
                                     prompt ""
                                     tooltip "Any value lower than this is low state."
                                     default nil
                                     guiRowHint 3
                                     required nil
                                     keyed t
                                     type float)
                           vCenter (nil
                                     prompt "Center Voltage"
                                     tooltip "Any value higher than this value is high state, and lower than this is low state."
                                     default nil
                                     guiRowHint 4
                                     required nil
                                     keyed t
                                     type float)
                           timeX (nil
                                     prompt "Time to X"
                                     tooltip "The minimum duration of analog signal between vHigh and vLow. It is used to determine logic X."
                                     default 1
                                     required nil
                                     keyed t
                                     guiRowHint 5
                                     type float)
                   )
                   inputrange t
                   )
    )
    outputs (result)
   )
)

Regards,

Andrew.

Hi Faisal,

I had a few minutes on a plane yesterday (I know how to have fun!), so I threw this together. It needs the code from this post too (I made life easier for myself by reusing some of that code).

To use it, use the "fx" button in the calculator function panel and navigate to the file - it will add the calculator UI too which works just like analog2Digital. See the comments at the top for an example usage.

/* abA2DBus.il

Author     A.D.Beckett
Group      Custom IC (UK), Cadence Design Systems Ltd.
Language   SKILL
Date       Jun 20, 2018 
Modified   May 13, 2023 
By         A.D.Beckett

Function to convert an analog bus to a digital bus. For example:

numConv(value(abA2DBus(VT("/op<5:0>")  "center" ?vCenter 0.6) 0 ) "dec" t)

Outputs the decimal value of the bus at time 0.

Can be installed in the calculator using the fx button in the function
panel, or the + button in the expresson builder

***************************************************

SCCS Info: @(#) abA2DBus.il 05/13/23.15:29:40 1.2

*/

/*********************************************************************
*                                                                    *
* abA2DBus(analogBus thresholdType [?radix radix] [?vCenter vCenter] *
*              [?vHigh vHigh] [?vLow  vlow] [?timeX 1])              *
*                                                                    *
*  Function similar to analog2Digital except will work on an analog  *
*                   bus and return a digital bus.                    *
*                                                                    *
*********************************************************************/

procedure(abA2DBus(analogBus @key (radix "Hex") @rest args)
    awvCreateBus(
        "Bus"
        apply('analog2Digital
            abUnwrapFamily(analogBus)~>wave
            args
        )
        radix
    )
)

;;;;;;;;;;;;;;;;;;;;;;;;;; GUI builder information ;;;;;;;;;;;;;;;;;;;;;;;;;;;
ocnmRegGUIBuilder(
  '(nil
    function abA2DBus
    name abA2DBus
    description "Returns the digital form of an analog bus waveform"
    category ("Custom Functions")
    analysis (nil
              general  (nil
                   format ("abA2DBus(%s %s)" signal thresholdType)
                   signals (nil
                            signal (nil
                                    prompt "Waveform"
                                    tooltip "Input waveform"
                                    )
                   )
                   params (nil
                           radix (nil
                                     prompt "Radix"
                                     tooltip "The radix of the bus"
                                     default "Hex"
                                     required t
                                     keyed t
                                     guiRowHint 1
                                     type ("Hex" "Octal" "Binary" "Ascii" "Signed Decimal" "Unsigned Decimal")
                                     )
                           thresholdType (nil
                                     prompt "Logic Threshold"
                                     tooltip "Logic Threshold."
                                     required t
                                     default "hilo"
                                     type (("hilo" (" \"hilo\" ?radix %s ?vHigh %s ?vLow %s ?timeX %s" radix vHigh vLow timeX)) 
                                         ("center" (" \"center\" ?radix %s ?vCenter %s" radix vCenter)))
                                     guiRowHint 2
                                     guiEnableHint ((vHigh "hilo") (vLow "hilo") (timeX "hilo") (vCenter "center"))
                                     )
                          vHigh (nil
                                     prompt "Voltage High/Low"
                                     tooltip "Any value higher than this is high state."
                                     default nil
                                     guiRowHint 3
                                     required nil
                                     keyed t
                                     type float)
                           vLow (nil
                                     prompt ""
                                     tooltip "Any value lower than this is low state."
                                     default nil
                                     guiRowHint 3
                                     required nil
                                     keyed t
                                     type float)
                           vCenter (nil
                                     prompt "Center Voltage"
                                     tooltip "Any value higher than this value is high state, and lower than this is low state."
                                     default nil
                                     guiRowHint 4
                                     required nil
                                     keyed t
                                     type float)
                           timeX (nil
                                     prompt "Time to X"
                                     tooltip "The minimum duration of analog signal between vHigh and vLow. It is used to determine logic X."
                                     default 1
                                     required nil
                                     keyed t
                                     guiRowHint 5
                                     type float)
                   )
                   inputrange t
                   )
    )
    outputs (result)
   )
)

Regards,

Andrew.