plan undso

PLAN

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+Dinge die zu tun sind:
+
+- Schaltung entwerfen
+- Schaltung löten
+- blech sägen
+- brett sägen
+- brett aushölen
+- brett fasen
+- innenleben planen
+- impulsgeber befestigen
+- platte und heizelemente befestigen u. bohren
+- brett wachsen

firmware/codefragmente.c

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+
+// alter drehimpulsgebercode, aus marcus-thermometer
+void buttonpoll(){  // runs with 1.2kHz
+	uint8_t l,r,t,flanks,dir;
+	l=BUTTPIN & _BV(BUTTLPIN);
+	r=BUTTPIN & _BV(BUTTRPIN);
+	t=BUTTPIN & _BV(BUTTTPIN);
+
+	// debounce code
+	if (t != butttold && !butttbounce ) {
+		butttold = t;
+		butttbounce = BUTT_BOUNCE;
+		if (t == 0) { // active low
+			buttonevent |= BUTTEV_PUSH;
+		}
+	}
+
+	flanks=0;
+	dir=0;
+	if (l != buttlold) {
+		flanks += 1;
+	}
+	if (r != buttrold) {
+		flanks += 1;
+		dir = 1;
+	}
+	if (flanks == 1){ // we need to have exactly one flank, 0 flanks are no
+					  // change, and 2 flanks are too fast (error)
+		if (l) {
+			dir ^= 1;
+		}
+		if (r) {
+			dir ^= 1;
+		}
+		if ((r && l) || (!r && !l)) {
+			buttoninc += dir ? -1 : 1;
+		}
+	}
+
+	buttlold = l;
+	buttrold = r;
+
+
+	if(butttbounce){
+		butttbounce -= 1;
+	}
+
+}
+