Bit Angle Modulation (BAM) in a PIC

[sanch0]

And I use only pure ASM code for such relatively slow MCUs, of course...

p.s. please don't expect me to do it very soon, as i have to finish some other projects too. Firstly I must repair of girlfriend's apartment and after that I planned to develop some mechanics for other project. It could take 2 weeks, i hope. Sorry. Hope u'll be patient.
Darrel Taylor: )))))))))))))))))))))))))))))))))))))))))))))
It do what it supposed to do, not less not more.)) I've got enough measurement tools and other stuff to be 100% sure what i'm saying. And even i hadn't any of them... I don't just put MCU instructions into text file randomly. I know what i'm doing _exactly_, Darrel. I started studying electronics and ASM (for Z80 - first programming language i studied and used, M68K, PIC, AVR, x86 etc.) from my childrenhood, so i know what about i'm talking. U just have not any chanse, Darrel))))

[lanyong]

And I use only pure ASM code for such relatively slow MCUs, of course...

because u can share ur code.

so i say the secret,haha.

we can get A[0],A[1],,,A[13].

then

move A[1] to W.

then

movff A[0], PORTA
movwf PORTA

then we changer the H/L in a cycle.

have a good time.

haha.

[sanch0]

because u can share ur code.

so i say the secret,haha.

we can get A[0],A[1],,,A[13].

then

move A[1] to W.

then

movff A[0], PORTA
movwf PORTA

then we changer the H/L in a cycle.

have a good time.

haha.

Yep=)))
It's something like that.


btw, i had got my first shocks from electronics when i tryed to understand how my photoflash works. There was ~1000V on capacitor after trafo, but it didn't scare me) i was 5 years old then)

[lanyong]

Yep=)))
It's something like that.


btw, i had got my first shocks from electronics mosquitowhen i tryed to understand how my photoflash works. There was ~1000V on capacitor after trafo, but it didn't scare me) i was 5 years old then)

but it is a secret for me.

we can use the 1000v to electronic mosquito,

[Mike, K8LH]

Darrel,

I think these Gentlemen may be having a little fun at your expense as they try to get a rise out of you (LOL). That's the only reason I can think of for avoiding a simple question and for becoming a bit offensive when challenged.

My precalculated "output table" or "toggle table" MIBAM method should work fine with 13 or 14 bit duty cycle values but as you've already determined I can only get refresh rates of 610-Hz (8-chan, 13-bit, 200-nsec step) or 305-Hz (16-chan, 13-bit, 400-nsec step), etc., when using an 18F' device and 40-MHz clock (Tcy = 100-nsec). ISR "overhead" would be about 77% for the example below but could be improved with some structural changes.

Take care. Kind regards, Mike

;
;  8-chan (port b), 13-bit, 200-nsec (1638.4-usec period), 610-Hz
;
v_isr_h
        movff   bdat+12,LATB    ; b12 data        (2048T)
        inDlyCy(2048*tStep-2)   ; half 2^12
        movff   bdat+11,LATB    ; b11 data        (1024T)
        inDlyCy(1024*tStep-2)   ; half 2^11
        movff   bdat+10,LATB    ; b10 data        (512T)
        inDlyCy(512*tStep-2)    ; half 2^10
        movff   bdat+09,LATB    ; b9 data         (256T)
        inDlyCy(256*tStep-2)    ; half 2^9
        movff   bdat+08,LATB    ; b8 data         (128T)
        inDlyCy(128*tStep-2)    ; half 2^8
        movff   bdat+07,LATB    ; b7 data         (64T)
        inDlyCy(64*tStep-2)     ; half 2^7
        movff   bdat+06,LATB    ; b6 data         (32T)
        inDlyCy(32*tStep-2)     ; half 2^6
        movff   bdat+05,LATB    ; b5 data         (16T)
        inDlyCy(16*tStep-2)     ; half 2^5
        movff   bdat+04,LATB    ; b4 data         (8T)
        inDlyCy(8*tStep-2)      ; half 2^4
        movff   bdat+03,LATB    ; b3 data         (4T)
        inDlyCy(4*tStep-2)      ; half 2^3
        movff   bdat+02,LATB    ; b2 data         (2T)
        inDlyCy(2*tStep-2)      ; half 2^2
        movff   bdat+01,LATB    ; b1 data         (1T)
        inDlyCy(1*tStep-2)      ; half 2^1 (0 delay)
        movff   bdat+00,LATB    ; b0 data         (1T)
        inDlyCy(1*tStep-2)      ; full 2^0 (0 delay)
        movff   bdat+01,LATB    ; b1 data         (1T)
        inDlyCy(1*tStep-2)      ; half 2^1 (0 delay)
        movff   bdat+02,LATB    ; b2 data         (2T)
        inDlyCy(2*tStep-2)      ; half 2^2
        movff   bdat+03,LATB    ; b3 data         (4T)
        inDlyCy(4*tStep-2)      ; half 2^3
        movff   bdat+04,LATB    ; b4 data         (8T)
        inDlyCy(8*tStep-2)      ; half 2^4
        movff   bdat+05,LATB    ; b5 data         (16T)
        inDlyCy(16*tStep-2)     ; half 2^5
        movff   bdat+06,LATB    ; b6 data         (32T)
        inDlyCy(32*tStep-2)     ; half 2^6
        movff   bdat+07,LATB    ; b7 data         (64T)
        inDlyCy(64*tStep-2)     ; half 2^7
        movff   bdat+08,LATB    ; b8 data         (128T)
        inDlyCy(128*tStep-2)    ; half 2^8
        movff   bdat+09,LATB    ; b9 data         (256T)
        inDlyCy(256*tStep-2)    ; half 2^9
        movff   bdat+10,LATB    ; b10 data        (512T)
        inDlyCy(512*tStep-2)    ; half 2^10
        movff   bdat+11,LATB    ; b11 data        (1024T)
        inDlyCy(1024*tStep-802) ; half 2^11
        rcall   prep            ; rebuild bdat array
        movff   btmp,LATB       ; b12 data        (2048T)
        retfie  FAST            ;
;

[Darrel Taylor]

Thanks for the Backup Mike.
It's nice to see somebody else gets the same numbers.

I'm making some progress with the "full-port" modification to MIBAM.

Actually doing the outputs is easy, just like you showed previously.
But I'm still having problems letting the user assign pins at random.

It's getting there, although a bit slower than anticipated.
<br>

[sanch0]

Thanks for the Backup Mike.
It's nice to see somebody else gets the same numbers.

I'm making some progress with the "full-port" modification to MIBAM.

Actually doing the outputs is easy, just like you showed previously.
But I'm still having problems letting the user assign pins at random.

It's getting there, although a bit slower than anticipated.
<br>

that's nice, but not so effective at all. interleaving could be used to get more channels at the same freq. and something else to get 100ns discretization.)))

[lanyong]

from ur childrenhood.

my god.

too young,haha.

i learn mcu in Unversity only.