Servo control / UART / SPI help needed

[sayzer]

...
A 10mS pause is easy.... PAUSE 50

Because your PIC is running 5 times as fast as the compiler thinks it is, all delays will be a fifth of what it expects so the 50mS pause will become 10mS.

This is not valid for PAUSE command. It is for PULSOUT type of commands.

I want a 10 microsecond pause not a 10 millisecond pause, that's the problem

With at least 10Mhz OSC, 10uS pause can be achieved using PAUSEUS command. Since you are using 20Mhz, it WOULD BE ok in your case by PAUSEUS 10 but you are not using PBP. So it won't be possible until you get PBP.

Therefore, you will need to use ASM routine to create a sensitive uS delay.



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[paul borgmeier]

Therefore, you will need to use ASM routine to create a sensitive uS delay.

Not so - try this (with 20Mhz xtal 4 instructions = 1 uS)

Main:

Gosub Delay_10	' 10 uS delay
Gosub Delay_1 	' 1 us delay

GOTO Main

' *** Delay 10 us Subroutine (2 instructions to get here and 2 to get back)
Delay_10:
Gosub Delay_1
Gosub Delay_1
Gosub Delay_1
Gosub Delay_1
Gosub Delay_1
Gosub Delay_1
Gosub Delay_1
Gosub Delay_1
Gosub Delay_1
Return

' *** Delay 1 us Subroutine (2 instructions to get here and 2 to get back)
Delay_1:
Return

END

[sayzer]

hehe

Clever!


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[Blackhawk]

Thanks for the help, I was wondering if I could uselessly move bits around to get the delay but I didn't know exactly how long the processes would take.