PIC10F202 Variable trouble

[paul borgmeier]

Another option that does not involve ASM, EXT, or altering files (but should work even though it is slightly contrived.)... You are low on Data Ram but big on Program Space (200 of 512 words used) right?

1) Change the IF-AND-THEN to nested IF-THENs as noted by Steve and Bruce

2) b0 ranges from 0-3 (2 bits). Drop the b0 variable and stash the values in OPTION_REG<1:0> (with the prescaler pointed to the Timer, which you are not using)

3)Time2 ranges from 0-73 (7 bits). Drop the Time2 variable and store the lower 5 bits in the FSR register, the 6th bit in OPTION_REG<2>, and the 7th bit in OPTION_REG<4>.

The rest of your variables fit – the code to deal with the above changes adds some complexity but would not be hard to implement.

Yet another option (you said commercial product – the price difference between the 202 and the 629 in quantity is about 0.30USD). Live with the loss or charge your customer a little more and have a clean solution with the 12F629.

Yet another option – take a week to learn ASM if you do not already know it. This part (10F202) has little complexity and it would not be difficult to convert your code to ASM. Bruce has a good ASM example posted in the example code section plus there are lots of good tutorials out there.

[picnaut]

Hi,

Depending on the volume of sales you expect, it may be worth the expense of switching to a different compiler for this project.
I’ve heard that the Hitech PIC C-compiler is very good at producing lean and reliable code. It’s pricey though.

Another option is the Proton compiler (at least the latest version that comes with PDS). A guy on that forum was able to compile your program using only 12 vars. This is a much cheaper option and should be really easy to port over from PBP (both are basic compilers).

Alternatively, maybe someone on the PDS forum could simply give you the HEX file for your program (for free or maybe only a small fee).
It’s a pretty simple program so, unless you’re planning on making lots of changes to it, that may be the cheapest option.

Cheers,

[mister_e]

Another option is the Proton compiler (at least the latest version that comes with PDS).

i know you could'nt resist...

[George]

Thanks for all your help guys very useful info all of you - I'll have a play with it next week and see what I can sort if I can't sort it I might see if one of you guys wouldn't mind being paid to convert to asm.

Cheers

[Ron Marcus]

Yet another option – take a week to learn ASM if you do not already know it. This part (10F202) has little complexity and it would not be difficult to convert your code to ASM. Bruce has a good ASM example posted in the example code section plus there are lots of good tutorials out there.

Off/on topic... Can I use PBP to compile for the 202, but other than declaring constants and variables, do everything in assembly? And...will this add code to the program as opposed to writing it on MPASM?

Thanks,
Ron

[Ron Marcus]

Duh!
I asked the same question in February. I should probably do a search before I post and embarrass myself!

Ron

[sayzer]

Duh!
I asked the same question in February. I should probably do a search before I post and embarrass myself!

Ron

It shall be your right to ask the same question again if you did not get the (an) answer in Feb. I see no embarrassing.

[Ron Marcus]

No...I got the answer back then too! I've got to switch to lead free solder!