Initial commit

board v1, firmware for arduino

firmware/bdgsm.ino

@@ -0,0 +1,84 @@
+byte cmdlen = 0;
+
+void setup() {                
+  DDRC = B11111111; 
+  DDRB = B11111111;
+  DDRD = B11111110;
+  Serial.begin(9600);
+  PORTC = B00000000;
+  PORTB = B00000000;
+  PORTD = B00000000;
+}
+
+void loop() {
+  ServeConsole();
+}
+
+void ServeConsole() {
+  static char cmd[16];
+  while(Serial.available()) {                     // Read chars from buffer.
+    byte c = Serial.read();
+    if (cmdlen>=sizeof(cmd)) {
+      Serial.println("Troll detected!");
+      c = '-';
+    }
+    Serial.print((char)c);
+    if (c == 10 || c == 13 || c==64) {
+      for (cmdlen=cmdlen; cmdlen<sizeof(cmd); cmdlen++) {  // clean rest of cmd, because a troll user may occur
+        cmd[cmdlen] = 0;                                   // FIXME: better way is correct command terminator handling
+      }
+      Serial.println("exec");
+      ExecCommand(cmd);
+      cmd[cmdlen = 0] = 0;
+      return;
+    }
+    if (c == '-') {
+      cmd[cmdlen = 0] = 0;
+      Serial.println("Aborted.");
+      return;
+    }
+    cmd[cmdlen++] = c;
+    cmd[cmdlen] = 0;
+  }
+  return;
+}
+
+void ExecCommand(char *cmd) {
+  byte portnum;
+  boolean status;
+  switch (cmd[0]) {
+  case 's':
+    /* set bit
+        1 → portid (a-)
+        2 → state (1/0)
+        FIXME: syntax checking
+    */
+    portnum = cmd[1]-97;
+    status = false;
+    if (cmd[2] == '1') {
+      status = true;
+    }
+    if (portnum <= 7) {
+      PORTD = SetBit(portnum, PORTD, status);
+    } else if (portnum <= 15) {
+      PORTB = SetBit(portnum-8, PORTB, status);
+    } else if (portnum <= 23) {
+      PORTC = SetBit(portnum-16, PORTC, status);
+    }
+    break;
+  default:
+    Serial.println("WTF?");
+    break;
+  }
+  return;
+}
+
+byte SetBit (byte pos, byte packet, boolean state) {
+  if(state) {
+    bitWrite(packet, pos, 1);
+  } 
+  else {
+    bitWrite(packet, pos, 0);
+  }
+  return packet;
+}