Way

This work
if (RPM > 3) then
low Estarter
else
high Estarter
pause 100
endif

this no work

if (RPM <= 3) then
high Estarter
pause 100
low Estarter
endif

Is rpm less than or equal to 3 when it doesn't work?

This work
if (RPM > 3) then
low Estarter
else
high Estarter
pause 100
endif

this no work

if (RPM <= 3) then (when is less the 3)
high Estarter
pause 100
low Estarter
endif

IF THEN with out an else has to have the THEN condition on the same line. This should work assuming "Estarter" is a Label or Statement.

Code:

---

if (RPM <= 3) then high Estarter
pause 100
low Estarter

---

It should work fine as-is, but if you expect to see the LED blink, you would probably
want a short pause after each logic state change.

I.E.;

Code:

---

RPM VAR BYTE
SYMBOL Estarter = PORTB.0
PORTB.0=0
TRISB.0=0

Main:
    for RPM = 0 TO 255
    if (RPM > 3) then
      low Estarter
      pause 100
    else
      high Estarter
      pause 100
    endif

    if (RPM <= 3) then
      high Estarter
      pause 100
      low Estarter
      pause 100
    endif
    next RPM
    goto Main
   
    END

---

This definitely works. LED blinks 4 times on each pass through the loop.

I'm thinking they weren't meant to be in the same program.
They are attemping to do the same thing, 2 different ways.

Quote:

---

Originally Posted by jetpr

This work

Code:

---

        if (RPM > 3) then 
          low Estarter 
        else
          high Estarter
          pause 100
        endif

---

this no work

Code:

---

        if (RPM <= 3) then 
          high Estarter
          pause 100
          low Estarter 
        endif

---

---

In which case, the second example is simply missing the else...

Code:

---

        if (RPM <= 3) then 
          high Estarter
          pause 100
        else
          low Estarter 
        endif

---