USART+PWM Problem

[skimask]

Yes we canmake it so as a 1 chanel and workşng no problem but if i want to use it 4 or 8 chanel then i will need a pwm and pic has max 3 pwm no more how can we use and make other chanels pwm if i want to use 5 chanel dmx data for led inensty?Then i will need more pwm and i have to make it with code i think*

SSPWM...already been mentioned here...in this thread...

[alex-x]

SSPWM ??

how is it?

[skimask]

SSPWM ??

how is it?

Did you search for it yet?

[mister_e]

http://www.pbpgroup.com/modules/wfse...p?articleid=12

[alex-x]

@mister_e thanks i will try it

[dreamman]

Hi , i tryed this code but it is not working as a pwm for led
where is the problem?

is it here ? How can we use newlevel1 as a pwm value?

"" pwm portc.2, newlevel1 ,100 'i want dimming a LED on PORTC.2"""




************************************************** *******
************************************************** *******

DEFINE OSC 20
DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 24h
DEFINE HSER_SPBRG 4
DEFINE HSER_BAUD 250000
DEFINE HSER_CLROERR 1



counter VAR word
idleflag VAR WORD
dummy VAR WORD
RCIF VAR byte
startcode VAR WORD
aminus VAR WORD
adresse_grada VAR WORD
x VAR WORD
newlevel1 VAR WORD
ADCON0=0
ADCON1=7
adresse_grada = 2


checkdmx:

counter = 1
pulsin portc.7,0,counter
if counter = 0 then
idleflag = 1
endif


if counter < 40 then checkdmx

dummy = RCREG
dummy = RCREG
SPBRG = 0
TXSTA.2 = 0 'brgh = 0
TXSTA.4 = 0
RCSTA.7 = 1
RCSTA.6 = 0
RCSTA.4 = 0
RCSTA.4 = 1

while RCIF = 0:wend

startcode = RCREG

if startcode <> 0 then checkdmx

aminus = adresse_grada - 1

for x = 1 to aminus
while RCIF = 0:WEND
dummy = RCREG
next x

newlevel1 = RCREG
pwm portc.2, newlevel1 ,100 ' HERE PROBLEM I THINK
RCSTA.7 = 0

goto checkdmx
return

[mister_e]

Hi and welcome on the forum.

1. Those DEFINE's HSER_xxxx are not needed if you're not using HSERIN.

2. it look like another DMX routine to me

What's working and what doesn't?

Do you understand the DMX protocol?

How about your schematic, configuration fuses, PIC#?

[rlmack35]

SSPWM ??

how is it?

MiBAM is much smoother (personal opinion). You can dim 24 pins with very little processing power. Send the value and it retains it until you change it.