PICBasic Pro Question !?

[metal]

Hello guys

I have seen this topic in http://www.rentron.com/PicBasic/IR_Chips.htm

What is" GOTO $+1 " supposed to mean, and how is the 40KHz signal is generated.

Regards

 

[micropar]

Hi metal,

"GOTO $+1" is asm directive type instruction which mean jump to next instruction. As $ means current program counter of the Assembler (it is psuedo type used to track generation of object code in all most all assembler). Since it is for PICmicro, in this case, it will exactly generate 2 cycles delay.

Regards,

 

[metal]

Hello micropar

Thanks for replying, that seems convincing, cause goto, and branch instructions consume two cycles

Any way, how is the 40 KHz is generated.

Thanks in advance

 

[pete]

Simple:
1/25microseconds = 40khz