introduce display muxer

src/displayMuxer.c

@@ -0,0 +1,49 @@
+/*
+ * displayMuxer.c
+ *
+ *  Created on: 05.09.2016
+ *      Author: wn
+ */
+
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "displayMuxer.h"
+#include "display.h"
+
+
+typedef struct {
+	uint8_t value;
+	bool valid;
+} tDisplayValue;
+
+tDisplayValue displayValues[MUX_ENDS];
+
+
+void displayMuxerInit(void *handleArg) {
+	for (tMuxerSlot i = FIRST_MUX; i < MUX_ENDS; i++) {
+		displayValues[i].value = 0;
+		displayValues[i].valid = false;
+	}
+}
+
+void displayMuxerExec(void *handleArg) {
+	static tMuxerSlot slot = FIRST_MUX;
+
+	if (displayValues[slot].valid) {
+		displaySetValue(displayValues[slot].value);
+	}
+
+	slot++;
+	if (slot == MUX_ENDS) {
+		slot = FIRST_MUX;
+	}
+}
+
+void displayMuxerSetValue(uint8_t value, bool valid, tMuxerSlot slot) {
+	displayValues[slot].value = value;
+	displayValues[slot].valid = valid;
+}
+