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toblerone · 01-22-2005, 06:14 AM

dunno if anyone here does embedded programming, if ya do Ive a little knot I need some help with
Im working with a 87C552, an 8051 derivative, and am reading a number from a keypad to use as an Id to select a servo motor to run PWM to.
1) I have the keypad scan function saving the kay value to the accumulator.
2) I have the current PWM value for each of the 5 motors stored in registers 1 to 5

How do I use the number in the accumulator to select the information in the relevant register?
IE
if A = 3
then
move data from R3 to PWM0.

01-22-2005, 06:14 AM	#1 (permalink)
toblerone Registered User Join Date: Jul 2004 Posts: 11	Assembelly code register addressing dunno if anyone here does embedded programming, if ya do Ive a little knot I need some help with Im working with a 87C552, an 8051 derivative, and am reading a number from a keypad to use as an Id to select a servo motor to run PWM to. 1) I have the keypad scan function saving the kay value to the accumulator. 2) I have the current PWM value for each of the 5 motors stored in registers 1 to 5 How do I use the number in the accumulator to select the information in the relevant register? IE if A = 3 then move data from R3 to PWM0.