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rs485 communication
Hi i work on dmx receive code and some problem ,i want to receive 1 chanel dmx512 signal but what is my problem on this code ?
DEFINE OSC 20
CMCON = %00000111 TRISA = %11111110
TRISB = %00000010
OPTION_REG.7 = 1
T2CON = %00000100
' Set receive register to receiver enabled
RCSTA = %11010000
' Set transmit register to transmitter disabled
TXSTA = %00000110
' Set baud rate
SPBRG = 4
led1 var portb.4
Dummy var byte
Adres con 20
Break var bit
Adresteller var word
Ontvangbyte1 var byte
PWMLED1 var byte
pwmled1 = 0
while 1=1
if RCSTA.2 = 1 then ' framing error -> break
dummy = RCREG ' rcsta.2 reset
break = 1
portb.8 = 1 zet led 4 aan
Else
IF PIR1.5 = 1 then
if break = 1 then
break = 0
dummy = RCREG
adresteller = 0
else
dummy = RCREG
if adres = adresteller then
ontvangbyte1 = dummy
endif
adresteller = adresteller + 1
endif
endif
endif
'PWM VOOR 1 LEDje:
if pwmled1<=ontvangbyte1 then
led1 = 1
else
led1 = 0
endif
pwmled1 = pwmled1 + 1
if pwmled1 = 255 then pwmled1 = 0
wend
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Code:
CMCON = %00000111 TRISA = %11111110
error here
What? :)
Code:
portb.8 = 1 zet led 4 aan
will never work, well it might, but not the way you'd expect
If that's meant to be a label, won't work...
Code:
if pwmled1 = 255 then pwmled1 = 0
If you've got pwmled1 defined as a byte, no need to reset it, it'll just roll over to zero
