Soldering station

[mister_e]

You can still shave some bytes...

- you don't need 2 spi routines LCD_ByteOut & PrintDataLcd,
- replace the For-To-Next loop with Repeat-Until ones,
- if at all possible, try to skip the div32.
- use internal timer for delays (not sure it will that much though
- pwm with a high/low loop maybe?
- select case for a couple a if-then

couples of ideas like that. sounds like a nice challenge

[mister_e]

Another thing about the graphic part, I've messed with it a lot recently and I saved a load of code space by skipping the whole SELCT-CASE + Lookup thing by using something like

SearchChar:
        read (index), char
        if char == TheCharYoureLookingFor then
            Gosub PrintIt
            index=endtable
            endif
        index=index+6
        if (index)<endtable then SearchChar

But you need to modify a little bit the way your DATA lines are done.

            DATA @0,"0",$3E,$51,$49,$45,$3E,_       ';// 0                   
                    "1",$00,$42,$7F,$40,$00,_       ';// 1
                    "2",$42,$61,$51,$49,$46,_       ';// 2
                    "3",$21,$41,$45,$4B,$31,_       ';// 3
                    "4",$18,$14,$12,$7F,$10,_       ';// 4
                    "5",$27,$45,$45,$45,$39,_       ';// 5
                    "6",$3C,$4A,$49,$49,$30,_       ';// 6
                    "7",$01,$71,$09,$05,$03,_       ';// 7
                    "8",$36,$49,$49,$49,$36,_       ';// 8
                    "9",$06,$49,$49,$29,$1E,_       ';// 9
                    "+",$08,$08,$3E,$08,$08,_       ';// +
                    "-",$08,$08,$08,$08,$08,_       ';// -
                    ".",$00,$60,$60,$00,$00,_       ';// .
                    "G",$00,$02,$05,$02,$00,_       ' grad
                    "C",$3E,$41,$41,$41,$22,_       ' C
                    "M",$7F,$02,$0C,$02,$7F,_       ' M     
                    " ",$00,$00,$00,$00,$00,_       ' space
                    "^",$08,$04,$7F,$04,$08,_       ' arrow up
                    "_",$20,$40,$7F,$40,$20         ' arrow down

so when you want to display your grad character, just need to send G to that routine above. Simple... if it fits the EEPROM ...

[HenrikOlsson]

Hi,
314 words is the size when compiled by itself. Depending on what functions your code uses it might already have one or more of the PBP library routines included meaning the total size will be less than whatever + 314 words.

But like I said, the problem in this case is likely the amount of available RAM. If my count is correct your code uses 23 bytes and the original incPID uses 29 bytes, then, if I'm not mistaken, PBP adds ~24 bytes for its internal use (might change depending on what library routines are used, I don't know for sure). All in all this adds up to more than the 64 bytes of RAM available on the 12F675.

What I meant with not being worth it wasn't that you should throw a "bigger" PIC at the issue. I meant that I don't think the effort of implementing incPID is worth it considering the performance gain you might get compared to the aproaches already discussed. Sure, it it fits it's wort a try, if it doesn't fit I'd try to make do with what's available.

Finally incPID was written in order to be versatile and easy to use. It's probably possible to reduce the size and amount of RAM needed further if adapting it to a specific application - but that's up to anyone using it to do.

/Henrik.

[cncmachineguy]

I'm sure there is something I am missing here but,

Still have BIG thermal inertia of iron soldering (about 7-8 degree)...

Do you think you can do better then this? Or need to? Now if its an excersize in learning and just the fun of doing it, well thats a great reason. But I would think the tip temp will cool that much if you just blow on the tip. but to raise it will take full power for a few seconds to get it back, then it will overshoot. Just my HO.

[Archangel]

I'm sure there is something I am missing here but,


Do you think you can do better then this? Or need to? Now if its an exercise in learning and just the fun of doing it, well that's a great reason. But I would think the tip temp will cool that much if you just blow on the tip. but to raise it will take full power for a few seconds to get it back, then it will overshoot. Just my HO.

Just so we are all playing on the same field . . . are we talking degrees C or degrees F ? I am guessing Centigrade so that's more like 13 or 14 Fahrenheit.
Check out Robert's article:
http://itech.fgcu.edu/faculty/zalews...PIDcontrol.pdf

[mister_e]

Sure enough, it's not Kelvin... just sayin

[Archangel]

Sure enough, it's not Kelvin... just sayin

Hey! He (Kelvin) used to work for me . . .

[Jerson]

I can hazard a guess that changing this section of code

     vt=adval * 500      
            vt=div32 1023 
            grup=vt+grup  
            PAUSE 10

to this

vt=adval >> 1
grup=vt+grup
PAUSE 10

might save you a bit of code & ram space. But, I've not checked this, so, you'll beware. Again, if you notice,
I've used an approximation of divide by 2(500/1000) for 500/1023 instead of 1/2.046 I do not think it will matter much if you calibrate
the readings.