apply timezone on displayed time

2019-12-01 18:45:38 +01:00
parent 091a8c24e8
commit 9e934015e0
1 changed files with 9 additions and 0 deletions
--- a/code/src/main.c
+++ b/code/src/main.c
@@ -57,6 +57,15 @@ int main(void){
            cli();
            DS3231_read(clock);
            sei();
+
+            // convert from bcd and back
+            int8_t hour = (10 * (clock[2] & 0xF0)>>4) + (clock[2] & 0x0F);
+            hour += menu_val_timezone;
+            hour %= 24;
+            if(hour < 0)
+                hour = 24 + hour;
+            clock[2] = ((hour/10)<<4)|(hour % 10);
+
            clock_to_buffer(clock);

            PORTC = (PORTC & (~DOT)) | (clock[0]%2) << 4; // blink dots