Add Makefile

.gitignore

@@ -1,2 +1,3 @@
 klock4
+!klock4/
 html_out/

Arduino/klock4/klock4.ino

@@ -137,10 +137,10 @@ void clockUpdate() {
   ts += UPDATE_INTERVAL_S;
 
   /* drift determined experimentally:
-   * ~3.5 ms "calculation time" per cycle
-   * ~12.6ms/s aka 63.6ms/cycle other drift (wakeup time?)
+   * ~3.5ms/cycle "calculation time"
+   * 60ms/cycle other drift (wakeup time?)
    */
-  #define DRIFT_MS 65
+  #define DRIFT_MS 63
   #define SCHEDULE_DELAY_MS ((1000 * UPDATE_INTERVAL_S) - DRIFT_MS)
   scheduler.scheduleDelayed(clockUpdate, SCHEDULE_DELAY_MS);
 
@@ -173,7 +173,7 @@ void loop() {
       break;
   }
   */
-  ts = 1618048100L;
+  ts = 1618651100L;
 
   scheduler.execute();
 

Makefile

@@ -0,0 +1,18 @@
+CC = clang
+
+LIBS = -lm
+
+x86:
+	$(CC) $(LIBS) klock4_x86.c -o klock4-x86
+
+uc:
+	$(CC) $(LIBS) klock4_uc.c -o klock4-uc
+
+wasm:
+	mkdir -p html_out
+	emcc klock4_wasm.c -s WASM=1 -o html_out/klock4.html --shell-file html_template/shell_minimal.html
+
+all: x86 uc wasm
+
+clean:
+	rm -rf klock4-x86 klock4-uc html_out

klock4_wasm.c

@@ -80,7 +80,9 @@ void settime(time_t ts) {
 	float fminute = (float) minute + (float) second / 60;
 	minute = 5 * (unsigned int) roundf(fminute / 5);
 
-	unsigned int hour   = (ts / (60*60) + 1) % 12;
+	unsigned int timezone = 1;
+	unsigned int daylight_savings = 1;
+	unsigned int hour = (ts / (60*60) + timezone + daylight_savings) % 12;
 
 	//printf("%02d:%02d\n", hour, minute);