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stefanomalizia
Joined: 21 Jul 2011
Posts: 1
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| Problem with dimmer DMX and PIC18F26K22 |
 Posted: Fri Sep 30, 2011 5:15 pm |
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Hi guys, I'm a new user on this forum and I apologize for my bad English.
I explain my problem
my code works fine but sometimes I have errors in reception, occasionally I get the next channel of the channel set.
for example:
The board address is 120, sometimes I get the value of address 121.
Why????
I use Mark code receiver routine copied from this forum and pic work at 16MHz ( Cristal)
this is the full code:
| Code: |
//Compilatore PCWHD 4.122
/************************************************************************
* DEFINIZIONE I/O *
************************************************************************/
#define b0 PIN_A0 //PIN address
#define b1 PIN_B1
#define b2 PIN_B2
#define b3 PIN_B3
#define b4 PIN_B4 //PIN address
#define b5 PIN_B5
#define b6 PIN_B6
#define b7 PIN_B7
#define b8 PIN_A1
#define config PIN_A2
#define dim_1 PIN_C0
#define data_led PIN_A5
/************************************************************************
* DEFINIZIONE REGISTRI *
************************************************************************/
#byte SPBRGH1 = 0xFB0
#byte SPBRG1 = 0xFAF
#byte TXSTA1 = 0xFAC
#bit SYNC = TXSTA1.4
#bit BRGH = TXSTA1.2
#byte TRISC = 0xF94
#bit TRISC7 = TRISC.7
#bit TRISC6 = TRISC.6
#byte RCSTA1 = 0xFAB
#bit SPEN = RCSTA1.7
#bit RX9 = RCSTA1.6
#bit CREN = RCSTA1.4
#bit ADDEN = RCSTA1.3
#bit FERR = RCSTA1.2
#bit OERR = RCSTA1.1
#bit RX9D = RCSTA1.0
#byte RCREG1 = 0xFAE
#byte BAUDCON1 = 0xFB8
#bit DTRXP = BAUDCON1.5
#bit BRG16 = BAUDCON1.3
#byte INTCON = 0xFF2
#bit GIE = INTCON.3 // GIE/GIEH
#bit PEIE = INTCON.6 // PEIE/GIEL
#byte PIE1 = 0xF9D
#bit RC1IE = PIE1.5
#byte PIR1 = 0xF9E
#bit RC1IF = PIR1.5
/************************************************************************
* DEFINIZIONE VARIABILI GLOBALI *
************************************************************************/
//#define DMX_512_Offset 12 //Indirizzo Principale dispositivo DMX
int16 DMX_512_Offset=1;
#define MAX_BUFFER 1 //antes 24
int8 Rx_Buffer[MAX_BUFFER];
int8 Val_1 = 0;
/************************************************************************
* INIZIALIZZAZIONE RS485 *
************************************************************************/
void rs485_init(void)
{
TRISC6=1;
TRISC7=1;
SPBRGH1=0; //Baud Rate Generator
SPBRG1=3; //Baud Rate Generator
BRGH=1; // High Baud Rate Select bit
BRG16=0; // 16-bit Baud Rate Generator bi
SYNC=0; // EUSART Mode Select bit
SPEN=1; // Serial Port Enable bit
RC1IE=1;
GIE=1;
PEIE=1;
RX9=1; //9-bit Receive Enable bit
ADDEN=0; // Enables address detection, enable interrupt and load the receive buffer when RSR<8> is set
//DTRXP=0; // Data/Receive Polarity Select bit
CREN=1; //Continuous Receive Enable bit
return;
}
/************************************************************************
* Dimming MAP *
************************************************************************/
const int16 Map[256] = { 27536, 27536, 27536, 27536, 27536, 27536, 27691, 27846, 28001, 28156,
28311, 28467, 28622, 28777, 28932, 29087, 29242, 29397, 29552, 29707,
29862, 30018, 30173, 30328, 30483, 30638, 30793, 30948, 31103, 31258,
31413, 31569, 31724, 31879, 32034, 32189, 32344, 32499, 32654, 32809,
32964, 33120, 33275, 33430, 33585, 33740, 33895, 34050, 34205, 34360,
34515, 34671, 34826, 34981, 35136, 35291, 35446, 35601, 35756, 35911,
36066, 36221, 36377, 36532, 36687, 36842, 36997, 37152, 37307, 37462,
37617, 37772, 37928, 38083, 38238, 38393, 38548, 38703, 38858, 39013,
39168, 39323, 39479, 39634, 39789, 39944, 40099, 40254, 40409, 40564,
40719, 40874, 41030, 41185, 41340, 41495, 41650, 41805, 41960, 42115,
42270, 42425, 42581, 42736, 42891, 43046, 43201, 43356, 43511, 43666,
43821, 43976, 44131, 44287, 44442, 44597, 44752, 44907, 45062, 45217,
45372, 45527, 45682, 45838, 45993, 46148, 46303, 46458, 46613, 46768,
46923, 47078, 47233, 47389, 47544, 47699, 47854, 48009, 48164, 48319,
48474, 48629, 48784, 48940, 49095, 49250, 49405, 49560, 49715, 49870,
50025, 50180, 50335, 50490, 50646, 50801, 50956, 51111, 51266, 51421,
51576, 51731, 51886, 52041, 52197, 52352, 52507, 52662, 52817, 52972,
53127, 53282, 53437, 53592, 53748, 53903, 54058, 54213, 54368, 54523,
54678, 54833, 54988, 55143, 55299, 55454, 55609, 55764, 55919, 56074,
56229, 56384, 56539, 56694, 56850, 57005, 57160, 57315, 57470, 57625,
57780, 57935, 58090, 58245, 58400, 58556, 58711, 58866, 59021, 59176,
59331, 59486, 59641, 59796, 59951, 60107, 60262, 60417, 60572, 60727,
60882, 61037, 61192, 61347, 61502, 61658, 61813, 61968, 62123, 62278,
62433, 62588, 62743, 62898, 63053, 63209, 63364, 63519, 63674, 63829,
63984, 64139, 64294, 64449, 64604, 64760, 64915, 65070, 65225, 65380,
65535, 65535, 65535, 65535, 65535, 65535 };
/************************************************************************
* Pulse *
************************************************************************/
void trig(void)
{
output_high(dim_1);
delay_us(100);
output_low(dim_1);
return;
}
/************************************************************************
* RS485 *
************************************************************************/
#INT_RDA
void DMX_Rx_isr()
{
#define WAIT_FOR_NEXT_BYTE 0
#define WAIT_FOR_BREAK 1
#define WAIT_FOR_START 2
#define WAIT_FOR_DATA 3
#define RECEIVE_DATA 4
char data;
static char Rx_State = WAIT_FOR_BREAK;
union {
unsigned char fullbyte;
struct {
unsigned char RX9D:1;
unsigned char OERR:1;
unsigned char FERR:1;
unsigned char ADDEN:1;
unsigned char CREN:1;
unsigned char SREN:1;
unsigned char RX9:1;
unsigned char SPEN:1;
} bits ;
}rcsta;
static unsigned int16 DMX_512_Count=0;
static char Rx_Index = 0;
while (RC1IF)
{
output_high(data_led);
rcsta.fullbyte = RCSTA1;
data = RCREG1;
if (rcsta.bits.OERR)
{
CREN=0;
CREN=1;
Rx_State = WAIT_FOR_NEXT_BYTE;
return;
}
switch (Rx_State)
{
case WAIT_FOR_NEXT_BYTE:
if (!rcsta.bits.FERR)
Rx_State = WAIT_FOR_BREAK;
break;
case WAIT_FOR_BREAK:
/* Check for a framing error */
if (rcsta.bits.FERR)
{
if (!data)
Rx_State = WAIT_FOR_START;
}
break;
case WAIT_FOR_START:
if (rcsta.bits.FERR)
Rx_State = WAIT_FOR_NEXT_BYTE;
else
{
if (!data)
{
Rx_Index = 0;
if (DMX_512_Offset == 1)
Rx_State = RECEIVE_DATA;
else
{
Rx_State = WAIT_FOR_DATA;
DMX_512_Count = 1;
}
}
else
{
Rx_State = WAIT_FOR_BREAK;
}
}
break;
case WAIT_FOR_DATA:
if (rcsta.bits.FERR)
if (!data)
Rx_State = WAIT_FOR_START;
else
Rx_State = WAIT_FOR_NEXT_BYTE;
else
{
DMX_512_Count++;
if (DMX_512_Count == DMX_512_Offset)
Rx_State = RECEIVE_DATA;
}
break;
case RECEIVE_DATA:
if (rcsta.bits.FERR)
{
if (!data)
Rx_State = WAIT_FOR_START;
else
Rx_State = WAIT_FOR_NEXT_BYTE;
}
else
{
/* Store the data received in the Rx buffer */
//if (Rx_Buffer[Rx_Index] != data)
// levels[Rx_Index] |= 0x80;
Rx_Buffer[Rx_Index] = data;
/* Point to the next byte */
++Rx_Index;
/* Check to see if we have received all of our data */
if (Rx_Index >= MAX_BUFFER)
Rx_State = WAIT_FOR_BREAK;
}
break;
// default:
/* Unknown start code */
}
}
output_low(data_led);
return;
}
/************************************************************************
* ZERO CROSSING AND DIMMING INTERRUPT *
************************************************************************/
#int_EXT
void EXT_isr(void)
{
clear_interrupt(int_timer1);
clear_interrupt(int_timer3);
if(Val_1 < 5 ) //Lampada OFF
{
output_low(dim_1);
}else if(Val_1 > 250) //Lampada ON
{
output_high(dim_1);
}else
{
set_timer1(Map[Val_1]);
enable_interrupts(INT_TIMER1);
set_timer3(27000);
enable_interrupts(INT_TIMER3);
}
return;
}
#INT_TIMER1
void TIMER1_isr(void)
{
trig();
disable_interrupts(INT_TIMER1);
clear_interrupt(int_timer1);
return;
}
#INT_TIMER3
void TIMER3_isr(void)
{
set_timer1(Map[Val_1]);
enable_interrupts(INT_TIMER1);
disable_interrupts(INT_TIMER3);
clear_interrupt(int_timer3);
return;
}
/************************************************************************
* GET ADDRESS *
************************************************************************/
int16 get_address(void)
{
int16 address=0;
if(!input(b0))
{
address += 1;
}
if(!input(b1))
{
address += 2;
}
if(!input(b2))
{
address += 4;
}
if(!input(b3))
{
address += 8;
}
if(!input(b4))
{
address += 16;
}
if(!input(b5))
{
address += 32;
}
if(!input(b6))
{
address += 64;
}
if(!input(b7))
{
address += 128;
}
if(!input(b8))
{
address += 256;
}
return address;
}
/************************************************************************
* Programma Principale *
************************************************************************/
void main()
{
setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);
setup_timer_3(T3_INTERNAL|T3_DIV_BY_1);
setup_timer_4(T4_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);// This device COMP currently not supported by the PICWizard
//pulisco le uscite
output_low(data_led);
output_low(dim_1);
Rx_Buffer[0]=0; // Inizializzo buffer
port_b_pullups(TRUE);
//INIZIO ROUTINE DMX512
DMX_512_Offset = get_address(); //Acquisizione indirizzo scheda
ext_int_edge( H_TO_L ); //Interrupt sul fronte di discesa
enable_interrupts(INT_RDA); //abilito interrupt porta seriale
enable_interrupts(GLOBAL); //Abilito interrupt globali
rs485_init(); //Inizializzo comunicazione seriale rs485
if(input(config)) //Controllo Modalita DipSW-10
{
enable_interrupts(INT_EXT);
while(true)
{
Val_1 = Rx_Buffer[0];
/*
if((Rx_Buffer[0] < 5) && (Rx_Buffer[0]> 250))
{
Val_1 = Rx_Buffer[0];
}else
{
if(Val_1 < Rx_Buffer[0])
{
Val_1++;
}
if(Val_1 > Rx_Buffer[0])
{
Val_1--;
}
}
*/
}
} else //Modalità ON/OFF
{
disable_interrupts(INT_EXT); //Disabilito lo zero crossing
while(true) //ON/OFF routine
{
if(Rx_Buffer[0]>128) // 0-128 --> OFF / 129-255 --> ON
{
output_high(dim_1);
}else
{
output_low(dim_1);
}
}
}
}
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I hope in your help to solve this little problem... 
thank you |
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temtronic
Joined: 01 Jul 2010
Posts: 9127
Location: Greensville,Ontario
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| Posted: Fri Sep 30, 2011 6:38 pm |
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Without cut/paste/compiling your copied code I'd say that the difference in the addresses may be due to a timing problem(slewing or stretching). DMX512 is 250KHz I believe and is doable with a 16MHz xtal.
I used PicBaud.exe to figure out your setup may not be right, though PicBaud gives 2 perfect answers, the 3rd, like your program gives an error.
Any error in timing will cause problems,especially if using long lines, unshielded wire, EMI, etc. |
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freesat
Joined: 08 Feb 2011
Posts: 32
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| Posted: Wed Oct 05, 2011 2:11 am |
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I have done some dmx devices using long lines, poor cables and works fine! 100% success, but!!! I have problem like your only using AC Dimmer, in this case, delay routines caused the problem.
Now I'm trying dimmer based only in timer0, without delay_?s().
Check if your code have free cycles to handle dmx at 16Mhz. |
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