Am 04.06.2011 um 11:22 schrieb pito:
> Hi, for debugging/educative purposes I'd like to monitor the
> activity of the inner interpreter. The idea is it to have an led
> switched on/off when running through the interpreter, so I can see
> the interpreter interprets words and the program is running.
> Moreover, I can maesure the processes with oscope.
> Now the Q: where is the best place to place the led_on and led_off
> within the inner interpreter to get as much as possible info? P.
Set A=portaddress, b=bit to toggle bits with sbi ... cbi pair. Place
it in the DO_EXECUTE part of inner interpreter as shown below. You
get a short positive pulse of constant width followed by a low gap
indicating the time amforth spends elsewhere.
Michael
DO_EXECUTE:
sbi A,b ; Set bit in I/O register, 2 cycles <---
movw zl, wl ; 1 cycles
readflashcell temp0,temp1 ; 8 cycles (see your *.lst file)
movw zl, temp0 ; 1 cycles
cbi A,b ; Clear bit in I/O register, 2 cycles. <---
ijmp
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