Swordfish

I like the way Swordfish locates the variables and constants used in the asm and creates VARIABLE's that correspond with them. But I'm having problems with the constants. For instance... Const Aconst As Word = 500 ASM movlw High(Aconst) End ASM Results in ... VARIABLE ACONST = 244 MOVLW HIGH(ACONST)...

MOST of the instructions only use 1 word, but there are a few that take 2.

CALL
GOTO
LFSR
MOVFF

You can see it in the Instruction Set section of the datasheet, where it lists both WORDs and Cycles for each opcode.

I'm sure those would work, but it doesn't reduce the code size. MOVFF is a 2-word instruction ORG 0 CLRF TRISB ; 1 MOVFF CMCON, EECON1 ; 2 MOVFF EEDATA,LATB ; 2 INCF EEADR,1 ; 1 ;---- ; 6 words = 12 bytes Thought ya had me there for a minuite. :P

The damage is already done mister_e.

But it's good to know I won't need to write a Swordfish USB module for my new program.

One less thing to worry about.
Although, in an odd sort of way, I was looking forward to it.

Ha! There you go. :idea: Now it's the smallest 100% Swordfish program to do the job. And since you mentioned you were doing it on another forum too, and I assume that's a different language. Let me just continue the Sillyness with this 100% ASM program that I think would be the smallest, for any lan...

Thanks xor, But the "Good" part is debatable, as I'm sitting here on New Years Eve, still trying to come up with a better way. :oops: I wasn't satisfied with the last version at 35 bytes, because it relied on the bootloader for the timing, so in effect it really needed more code space than what Swor...

Dude! You're a hard man to beat. But here goes... 35 bytes. Device = 18F452 Clock = 20 Config WDT = OFF, STVR = OFF EEPROM = (1,2,4,8,16,32,64,128,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128,128,64,32,16,8,4,2,1, 1...

Hi Bruce , Indeed it does. Nice catch. I don't think I turned the power off the whole time I was playing with it. But sure enough, it only works some of the time when you do. It doesn't add much, weighs in at 39 bytes now. XOR , That works, although it runs a little bit slower. Possibly from the pow...

Tim, Thanks, I got lucky with that, since I had actually given up trying to beat your example. But after Bruce came up with something better, I figured maybe I quit too soon. :? XOR, Thought you had it! But after trying it, I found that Swordfish automatically puts ... SBGLB2 CLRWDT SLEEP BRA SBGLB...

Yeah, you're right. It's not exactly symmetrical . I was paying more attention to the challenge, than the look. So, here's a symmetrical data sequence. EEPROM = (1,2,4,8,16,32,64,128,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128,128,64,32,16,8,4,2,1, 1,2,4,8,1...

Here's 37 bytes. Assuming we're only talking Program space. Device = 18F452 Clock = 20 Config WDT = ON, WDTPS = 4 EEPROM = (1,2,4,8,16,32,64,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128,64,32,16,8,4,2,1, 1,2,4,8,16,32,64,128...

Hi Michael, That's great. Glad to know you can make some use of it. And I just happen to have a use for a Pressure units Converter too. But I'll leave that one up to you this time. :) I'm also going to need a Flow converter (GPM, GPH, GPD, LPM, LPH, LPD, etc). And of course there are so many other l...

Thanks for the info Warren,

I've always known LATB was there, but never saw anyone use it before, and never really thought much about what it was there for.

And, "roger that" on the "learning tool".

Hi Warren,

Just curious if there's some advantage to using LATB, instead of PORTB in your program?

Is it to overcome the Read/Modify/Write problem of the port?

Why the PWM output on all 8 pins of PORTB?

And, why not use the CCP module, since the PIC is now stuck doing a single task.

Excellent!

Thanks David.

My order's in.