Flap Position Indicator Code

[iwik]

Hi Guys,
Been trying to get Code to opearate corectly. Its for a Cessna and has o 10 20 and 30
degree steps. With the following code it works with one exception.
When the Indicator moves from 20 to 30 degrees or 30 to 20 the servo seems to speed up . Looking at the Fsuipc value when its showing 8192 its at 20 but as it passes thru
i think it appears to be a slight delay the the servo operates and moves at the correct speed until 30 is reached. Its almost as though when you just pass thru this 8192
its not seeing any change then it sees it and catches up ie increase in speed.
0 to 10 to 20 degrees either up or down is fine.
Appreciate anyones help to see where ive gone wrong.
Here is the code;

//
*******************************************************************
**********
// * Config_SIOC ver 3.4 - By Manolo Vélez - www.opencockpits.com (http://www.opencockpits.com)
//
*******************************************************************
**********
// * FileName : sioc.txt
// * Date : 04/06/2011

Var 0030, Link FSUIPC_INOUT, Offset $0BE0, Length 4 // Flap
Position
{
L0 = V0030
L0 = ABS L0
L2 = L0
IF L0 <= 5461
{
L1 = L2 * 0.0325
}
ELSE
{
L2 = L0 - 5461
IF L0 <= 8192
{
L1 = L2 * 0.044
L1 = L1 + 178
}
ELSE
{
L2 = L0 - 8192
IF L0 <= 16383
{
L1 = L2 * 0.0415
L1 = L1 + 536
}
}
}
&FlapPosServo = L1 + 72
}
Var 0001, name FlapPosServo, Link USB_SERVOS, Device 0, Output 1,
PosL 1, PosC 512, PosR 1023 // FLAP INDICATOR

Thanks
Les

[fordgt40]

Les

I do not see anything wrong with your code. The only thing that I can think of is that the servo ramp calculations are "interrupting" the smooth movement, though this seems highly unlikely :)

I attach a working code for the 737, though of course you will need to remove the LED outputs, change the servo and flap value/number of positions. Might be worth a try as it works smoothly on my machine.


Var 0095, name LE_EXT_LED, Link IOCARD_OUT, Output 41

Var 0096, name LE_TRANS_LED, Link IOCARD_OUT, Output 39

Var 0099, name FLAPS_IN, Link FSUIPC_INOUT, Offset $0BE0, Length 4
{
L0 = &FLAPS_IN
L0 = ABS L0
L2 = L0
IF L0 < 10
{
&LE_EXT_LED = 0
&LE_TRANS_LED = 0
}
C0 = L0 >= 10
C1 = L0 <= 408
IF C0 AND C1
{
&LE_TRANS_LED = 1
&LE_EXT_LED = 0
}
IF L0 > 408
{
C0 = L0 > 2049
C1 = L0 < 4095
IF C0 AND C1
{
&LE_TRANS_LED = 1
&LE_EXT_LED = 0
}
ELSE
{
&LE_TRANS_LED = 0
&LE_EXT_LED = 1
}
}
C0 = L0 >= 0
C1 = L0 <= 409
IF C0 AND C1
{
&x1 = 0 // between 0 and 1
&x2 = 409
&y1 = 1023
&y2 = 950
}
C0 = L0 >= 409
C1 = L0 <= 819
IF C0 AND C1
{
&x1 = 409
&x2 = 819
&y1 = 950
&y2 = 760 // between 1 and 2
}
C0 = L0 >= 819
C1 = L0 <= 2047
IF C0 AND C1
{
&x1 = 819
&x2 = 2047
&y1 = 760
&y2 = 650 // between 2 and 5
}
C0 = L0 >= 2047
C1 = L0 <= 4095
IF C0 AND C1
{
&x1 = 2047
&x2 = 4095
&y1 = 650
&y2 = 500 // between 5 and 10
}
C0 = L0 >= 4095
C1 = L0 <= 6143
IF C0 AND C1
{
&x1 = 4095
&x2 = 6143
&y1 = 500
&y2 = 400 // between 10 and 15
}
C0 = L0 >= 6143
C1 = L0 <= 10239
IF C0 AND C1
{
&x1 = 6143
&x2 = 10239
&y1 = 400
&y2 = 300 // between 15 and 25
}
C0 = L0 >= 10239
C1 = L0 <= 12287
IF C0 AND C1
{
&x1 = 10239
&x2 = 12287
&y1 = 300
&y2 = 220 // between 25 and 30
}
C0 = L0 >= 12287
C1 = L0 <= 16383
IF C0 AND C1
{
&x1 = 12287
&x2 = 16383
&y1 = 220
&y2 = 179 // between 30 and 40
}
&dy21 = &y2 - &y1
&dx21 = &x2 - &x1
&dx = L0 - &x1
&dy = &dy21 * &dx
&dy = &dy / &dx21
L1 = &y1 + &dy
&FLAPSERVO = L1
}

Var 0086, name dy

Var 0087, name dx21

Var 0088, name dy21

Var 0089, name dx

Var 0090, name x1

Var 0091, name x2

Var 0092, name y1

Var 0093, name y2

var 0022, name FLAPSERVO, Link USB_SERVOS,Output 1, POSL 177, POSC 512, POSR 1024

[iwik]

David,
Thanks for comments which are valued. After posting i hacked o/c code which ended up like yours and worked liked the one listed with this anomaly.
Further investigation, now think what im seeing is normal. You us ethe 737 and have degree settings of 0 1 2 5 10 ect. Looking at the gauge in the default
737 it can be seen to move thru 1 2 and 5 quicker than the rest. So changes in speed of servo not really noticeable. In my case i go from 0 to 10 degrees and so the degree diff is much greater and hence speed of servo will be more noticeable. I cant be sure about this unless i came across some one trying to do what i am doing. Others are using Simkits and they of course have their own code.
This effect is not really a problem as it is very quick occurence, maybe i could add afew more dummy positions to fine up up the resolution.
Regards
Les

[fordgt40]

Les

Thanks for the update and I think your conclusion is logical. A few more dummy positions or a DELAY factor could evem out the speed

Regards

David

[iwik]

Take Care
Les