Make button.c and button.h

Makefile

@@ -1,8 +1,8 @@
 CC=clang
-CFLAGS=-std=c99
+CFLAGS=-std=c99 -Wall
 LD=clang
 LDFLAGS=-lgpio -lfigpar
-SRCS=src/main.c src/util.c src/lcd.c src/ths.c
+SRCS=src/main.c src/util.c src/lcd.c src/ths.c src/button.c
 PROG=rpi4b-temp-humidity
 
 .include "config.mk"
@@ -11,9 +11,10 @@ OBJS=${SRCS:C/^src/bin/:C/.c$/.o/}
 bin/${PROG}: ${OBJS}
 	${LD} ${LDFLAGS} -o ${@} ${OBJS}
 
-main.o util.o lcd.o ths.o: util.h
+main.o util.o lcd.o ths.o button.o: util.h
 main.o lcd.o: lcd.h
 main.o ths.o: ths.h
+main.o button.o: button.h
 
 ${OBJS}: ${.TARGET:C/^bin/src/:C/.o$/.c/}
 	@mkdir -p bin/
@@ -25,6 +26,7 @@ ${OBJS}: ${.TARGET:C/^bin/src/:C/.o$/.c/}
 -DDEFAULT_FAIL_KEY="\"${DEFAULT_FAIL_KEY}\""\
 -DDEFAULT_FAIL_LIMIT="${DEFAULT_FAIL_LIMIT}"\
 -DDEFAULT_LCD_VERSION="\"${DEFAULT_LCD_VERSION}\""\
+-DDEFAULT_REFRESH_TIME="${DEFAULT_REFRESH_TIME}"\
 -o ${@} ${.ALLSRC}
 
 clean: