Initial commit

Author: StefanKrupop

.gitignore

@@ -0,0 +1,8 @@
+*.asm
+*.bin
+*.crt
+*.d64
+*.int
+*.lbl
+*.map
+*.prg

Arduino/NodleR4sUltimate/NodleR4sUltimate.ino

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+#include <DMXSerial.h>
+
+#define PC2   7
+#define PA2   15
+
+#define LED   17
+#define IRQ_DEBUG A2
+
+volatile uint8_t _state = 0;
+volatile uint16_t _address = 0;
+volatile uint8_t _len = 0;
+
+void receiveByte() {
+  digitalWrite(IRQ_DEBUG, HIGH);
+  uint8_t b = PINB;
+  uint8_t c = PINC;
+  uint8_t d = PIND;
+  // PB3, PB2, PB6, PB5, PB4, PD7, PC6, PD4
+  // PB1
+  uint8_t rec = ((b & 0x0c) << 4) | ((b & 0x70) >> 1) | ((d & 0x80) >> 5) | ((c & 0x40) >> 5) | ((d & 0x10) >> 4);
+  if ((b & 0x2) == 0) {
+    _address = rec;
+    digitalWrite(LED, LOW);
+    _state = 1;
+  } else if (_state == 1) {
+    _address = (_address << 8) | rec;
+    _state = 2;
+  } else if (_state == 2) {
+    _len = rec;
+    _state = 3;
+  } else if (_state == 3) {
+    DMXSerial.write(_address, rec);
+    _address++;
+    _len--;
+    if (_len == 0) {
+      digitalWrite(LED, HIGH);
+      _state = 0;
+    }
+  }
+  digitalWrite(IRQ_DEBUG, LOW);
+}
+
+void setup() {
+   pinMode(PC2, INPUT);
+   pinMode(PA2, INPUT);
+   pinMode(4, INPUT); pinMode(5, INPUT); pinMode(6, INPUT); pinMode(8, INPUT); pinMode(9, INPUT); pinMode(10, INPUT); pinMode(14, INPUT); pinMode(16, INPUT);
+   pinMode(7, INPUT);
+   attachInterrupt(digitalPinToInterrupt(PC2), receiveByte, FALLING);
+   pinMode(LED, OUTPUT);
+   digitalWrite(LED, HIGH);
+   pinMode(IRQ_DEBUG, OUTPUT);
+   digitalWrite(IRQ_DEBUG, LOW);
+
+   DMXSerial.init(DMXController);
+}
+
+void loop() {
+}

Arduino/NodleR4sUltimate/README.md

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+# Nodle R4S ULTIMATE #
+
+This is a do-it-yourself DMX 512 interface to be connected to the user port of a Commodore C64.
+It uses a Sparkfun Pro Micro (or compatible) and the Arduino framework.
+
+## Pinout ##
+
+| **C64 User Port** | **Pro Micro** |
+|:-----------------:|:-------------:|
+|         1         |      GND      |
+|         2         |      VCC      |
+|         8         |       7       |
+|         C         |       4       |
+|         D         |       5       |
+|         E         |       6       |
+|         F         |       8       |
+|         H         |       9       |
+|         J         |      10       |
+|         K         |      16       |
+|         L         |      14       |
+|         M         |      15       |
+
+Pin TXO of the Pro Micro is the DMX Out and needs to go to a RS485 Transceiver (e.g. SN75176) and then out to the DMX bus.