DMX512 Problem ..Schema+Code

[programmer07]

sorrry i forgot it to say,
i use microcode studio and Pbp 2,47
and as a pic16f628A and 20Mhz

DEFINE OSC 20
DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 24h ' Enable transmit, BRGH = 1
DEFINE HSER_CLROERR 1 ' Clear overflow automatically
'DEFINE HSER_SPBRG 129
DEFINE HSER_BAUD 250000


many peoples say that it is impossible to receive dmx512 in pbp.i dont know it is true or not? and i see that usart interputs is very big problem to receive 512dmx.

is it possible to receive dmx512 in 250000 baudrate?

can you make a code example to me how can i use Hserin command to receive dmx512. you can see my schema that what i want to make i have 3 chanel on my devices and i will make intensty control

0 -255 data = %0 -%100 intentsy

[programmer07]

Dear mister_e thanks for you help you have said me so;
but they say that it is impossible to receive dmx in pbp code cause of usart interputs
is it true?

but can you send an example here how to receive dmx512 with "hserin" command?
you can look my schema and say cause i have 9 dip on my schema and it is with 3 leds (3 chanel adress).and i must make intensty for my leds

0-255 = %0 - %100 intensty for each led.
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DMX baudrate is 250 000 Baud, 9600 will never ever work.

AND as you dont use any HSERIN/HSEROUT, the DEFINE HSER_xxx are useless. You need to write the right value directly to the SPBRG, RCSTA, TXSTA register

AND @4MHZ... good luck to have a reliable 250K baud serial comm. 12MHZ and up will work.
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