#include #include /* DMX buffer: indexed 1..512 */ extern volatile uint8_t dmx_data[]; /* Pin bit definitions (change bit numbers if different on your board) */ /* PE4, PE5, PG5, PE3, PH3, PH4, PH5, PH6, PB4, PB5, PB6, PB7, PL7, PL6, PL5, PL4, PL3, PL2, PL1, PL0, PD4, PD5, PD6, PJ4 */ /* For each Dn we need to map which port and bit will hold bit0..bit7 of the output byte. Here we assume each DMX channel is presented on a contiguous 8-bit port where possible. Since the pins are all over, we output each DMX byte bit-by-bit to 8 dedicated pins: bit 0 -> mapped pin for bit0, ... bit7 -> mapped pin for bit7. Replace the per-bit port/bit assignments below to match your desired wiring. */ /* Example per-bit mapping for channel outputs (one mapping choice). */ /* For brevity we map bits 0..7 of each channel to the same physical pin for that channel, i.e., output the full byte on 8-bit bus is not possible on single scattered pin. Instead we simply write the byte value to the port pins that form an 8-bit port where possible. We'll implement writing each channel's byte to its single port's low 8 bits when that port contains 8 consecutive pins; otherwise we write the byte on the low 8 bits of a chosen port using the relevant mask. */ /* Define helper macros for writing masked values */ static inline void write_masked(volatile uint8_t *port, volatile uint8_t *ddr, uint8_t mask, uint8_t value) { uint8_t cur = *port & ~mask; *port = cur | (value & mask); *ddr |= mask; // ensure pins are outputs } /* Concrete writers for the pins used (mask and port pointers) */ /* Adjust masks to the actual bit positions used on each port. The following masks assume: PB4..PB7 -> bits 4..7 on PORTB (fits for D8..D11) PL0..PL7 -> bits 0..7 on PORTL (fits for D12..D19) PH0..PH7 -> bits 0..7 on PORTH (we use PH3..PH6 for D4..D7 -> need masking) PD4..PD6 -> bits 4..6 on PORTD (D20..D22) PE0..PE7 -> bits 0..7 on PORTE (we use PE3,PE4,PE5 for D0,D1,D3) PJ4 -> bit 4 on PORTJ (D23) PG5 -> bit 5 on PORTG (D2) */ /* Write channel values to ports with appropriate masks */ void output_dmx_channels_1_24(void) { /* D0 -> PE4 : map whole byte to bits 0..7 not possible; instead output LSB..MSB across 8 pins For simplicity we output the byte value on an 8-bit pseudo-bus using multiple ports: Here we implement a pragmatic approach: output each channel value on 8 dedicated IO pins defined below. You must adapt bit-to-pin assignments to match your wiring. */ /* Example assignment: use PORTL for D12..D19 (8-bit) */ /* D12..D19 handled below; for single-pin channels we output LSB on that pin (as HIGH/LOW) — if you actually need parallel 8-bit outputs on dedicated pins per channel, you'll need 8 pins per channel (192 pins) which is unlikely. So this snippet writes each channel's byte value as a PWM-like ON/OFF level on a single digital pin using thresholding: -> if value >= 128 -> set pin HIGH else LOW. */ /* Quick implementation: set output pin HIGH if channel value >= 128, else LOW. Map each D0..D23 to its port/bit and write accordingly. */ uint8_t v; /* D0: PE4 (bit 4) */ v = dmx_data[1]; if (v >= 128) PORTE |= (1 << 4); else PORTE &= ~(1 << 4); DDRE |= (1 << 4); /* D1: PE5 (bit 5) */ v = dmx_data[2]; if (v >= 128) PORTE |= (1 << 5); else PORTE &= ~(1 << 5); DDRE |= (1 << 5); /* D2: PG5 (bit 5) */ v = dmx_data[3]; if (v >= 128) PORTG |= (1 << 5); else PORTG &= ~(1 << 5); DDRG |= (1 << 5); /* D3: PE3 (bit 3) */ v = dmx_data[4]; if (v >= 128) PORTE |= (1 << 3); else PORTE &= ~(1 << 3); DDRE |= (1 << 3); /* D4: PH3 (bit 3) */ v = dmx_data[5]; if (v >= 128) PORTH |= (1 << 3); else PORTH &= ~(1 << 3); DDRH |= (1 << 3); /* D5: PH4 (bit 4) */ v = dmx_data[6]; if (v >= 128) PORTH |= (1 << 4); else PORTH &= ~(1 << 4); DDRH |= (1 << 4); /* D6: PH5 (bit 5) */ v = dmx_data[7]; if (v >= 128) PORTH |= (1 << 5); else PORTH &= ~(1 << 5); DDRH |= (1 << 5); /* D7: PH6 (bit 6) */ v = dmx_data[8]; if (v >= 128) PORTH |= (1 << 6); else PORTH &= ~(1 << 6); DDRH |= (1 << 6); /* D8: PB4 (bit 4) */ v = dmx_data[9]; if (v >= 128) PORTB |= (1 << 4); else PORTB &= ~(1 << 4); DDRB |= (1 << 4); /* D9: PB5 (bit 5) */ v = dmx_data[10]; if (v >= 128) PORTB |= (1 << 5); else PORTB &= ~(1 << 5); DDRB |= (1 << 5); /* D10: PB6 (bit 6) */ v = dmx_data[11]; if (v >= 128) PORTB |= (1 << 6); else PORTB &= ~(1 << 6); DDRB |= (1 << 6); /* D11: PB7 (bit 7) */ v = dmx_data[12]; if (v >= 128) PORTB |= (1 << 7); else PORTB &= ~(1 << 7); DDRB |= (1 << 7); /* D12: PL7 (bit 7) */ v = dmx_data[13]; if (v >= 128) PORTL |= (1 << 7); else PORTL &= ~(1 << 7); DDRL |= (1 << 7); /* D13: PL6 (bit 6) */ v = dmx_data[14]; if (v >= 128) PORTL |= (1 << 6); else PORTL &= ~(1 << 6); DDRL |= (1 << 6); /* D14: PL5 (bit 5) */ v = dmx_data[15]; if (v >= 128) PORTL |= (1 << 5); else PORTL &= ~(1 << 5); DDRL |= (1 << 5); /* D15: PL4 (bit 4) */ v = dmx_data[16]; if (v >= 128) PORTL |= (1 << 4); else PORTL &= ~(1 << 4); DDRL |= (1 << 4); /* D16: PL3 (bit 3) */ v = dmx_data[17]; if (v >= 128) PORTL |= (1 << 3); else PORTL &= ~(1 << 3); DDRL |= (1 << 3); /* D17: PL2 (bit 2) */ v = dmx_data[18]; if (v >= 128) PORTL |= (1 << 2); else PORTL &= ~(1 << 2); DDRL |= (1 << 2); /* D18: PL1 (bit 1) */ v = dmx_data[19]; if (v >= 128) PORTL |= (1 << 1); else PORTL &= ~(1 << 1); DDRL |= (1 << 1); /* D19: PL0 (bit 0) */ v = dmx_data[20]; if (v >= 128) PORTL |= (1 << 0); else PORTL &= ~(1 << 0); DDRL |= (1 << 0); /* D20: PD4 (bit 4) */ v = dmx_data[21]; if (v >= 128) PORTD |= (1 << 4); else PORTD &= ~(1 << 4); DDRD |= (1 << 4); /* D21: PD5 (bit 5) */ v = dmx_data[22]; if (v >= 128) PORTD |= (1 << 5); else PORTD &= ~(1 << 5); DDRD |= (1 << 5); /* D22: PD6 (bit 6) */ v = dmx_data[23]; if (v >= 128) PORTD |= (1 << 6); else PORTD &= ~(1 << 6); DDRD |= (1 << 6); /* D23: PJ4 (bit 4) */ v = dmx_data[24]; if (v >= 128) PORTJ |= (1 << 4); else PORTJ &= ~(1 << 4); DDRJ |= (1 << 4); }