Please help me with BS2 code for school robot project. Pic and code included!!!!

Tony_tsi

I am building a robot for school. I do not use basic stamp very often and I need help with a select...case statement. The select statement needs to select inputs 9-15. The code is very simple. I need a line to replace ( SELECT IN9-IN15 )

The code for the robot is in the link below.
code for robot.bs2

Tony_tsi

I should add that the line ( SELECT IN9-IN15 ) looks good but doesn't work.

Phil Pilgrim (PhiPi)

Your select condition, SELECT IN9-IN15, subtracts one bit input from another. Instead, try,

SELECT INS >> 9

This takes all 16 input bits as a word, and shifts it right by 9 positions, leaving bits 15..9 in positions 6..0.

But even then, I'm not sure that's what you want. Pins 15..9 represent seven pins, but your conditions use only six.

-Phil

skylight

It may or may not be relevant to which type of sensor being used whether infrared or QTI but if you look at the example code on the product page for the QTI sensors it suggests the result of the sensor is saved to a variable first and then used wih the Select Case method rather than reading direct, the infrared sensor is read direct using INL perhaps its a timing thing?

Tony_tsi

This is basically what i built except I used opamps to make a digital signal.
http://www.parallax.com/Store/Sensors/ColorLight/tabid/175/CategoryID/50/List/0/SortField/0/Level/a/ProductID/729/Default.aspx

skylight

Did you look at the example code on that product page? It suggests you use Select INL presuming you wired it as suggested to your robot.

Tony_tsi

The one parallax makes has 8 sensors I only have 5 on mine. Also INL selects inputs 0-7 I am using inputs 11-15. I think the suggestion from Phil will work i can test it today.

Tony_tsi

This worked great we won 1st place thanks for the help. info here: http://www.tonytronix.com/myprojects/ee101bugproject.html