Campbell DSP4 Especificações descarregar pdf (Página 154)

Section 6. Data Table Declarations and Output Processing Instructions

Histogram4D Output Example

'The example program below is an example of using the Histogram4D

'instruction to calculate a 2 dimensional histogram of RPM distribution vs Gear

'\\\\\\\\\\\\\\\\\\\\ VARIABLES and CONSTANTS ////////////////////

Public RPM, Gear, Port(4)

Dim Bin(2)

'\\\\\\\\\\\\\\\\\\\\\\\\ OUTPUT SECTION ////////////////////////

DataTable (RPMvsG,1,100)

DataInterval(0,60,Min,100)

Histogram4D(Bin(), FP2, 0,4,8, 0, 0,000,1,0.5, 4.5, 0,8000, 0, 0, 0, 0)

'4 bins for gear, range 0.5 to 4.5; 8 bins for RPM range 0 to 8000

'Open form so that RPM >8000 is included in 7000 to 8000 bin

EndTable

'\\\\\\\\\\\\\\\\\\\\\\\\\\\ PROGRAM ///////////////////////////

BeginProg

Scan (100,mSec,3,0)

PulseCount (RPM,1,1 ,1,1,0.4225,0) 'RPM from pick up on 142 tooth fly wheel

'60 rpm/142 Hz = 0.42253 ...

Portget (Port(1),1) 'There are digital inputs to ports 1 to 4

Portget (Port(2),2) 'If C1 is high then the car is in first gear

Portget (Port(3),3) 'C2 indicates 2nd gear etc.

Portget (Port(4),4)

IF Port(1) then Gear = 1

If Port(2) Then Gear = 2

If Port(3) Then Gear = 3

If Port(4) Then Gear = 4

Bin(1) = Gear

Bin(2) = RPM

CallTable RPMvsG

Next Scan

EndProg

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Campbell DSP4 Especificações Página 154