Add export screen

Makefile

@@ -7,7 +7,8 @@ LD=clang
 LDFLAGS=-lgpio -lfigpar -lpthread ${SQLITE3_LDFLAGS}
 SRCS=src/main.c src/util.c src/lcd.c src/ths.c src/button.c src/ui/screen.c\
      src/ui/datesel.c src/ui/statsby.c src/ui/datapoints.c src/ui/timesel.c\
-     src/ui/statrange.c src/config.c src/ui/blankscreen.c
+     src/ui/statrange.c src/config.c src/ui/blankscreen.c src/drive.c\
+     src/ui/exportscreen.c
 PROG=rpi4b-temp-humidity
 
 OBJS=${SRCS:C/^src/bin/:C/.c$/.o/}
@@ -40,6 +41,8 @@ bin/main.o bin/ui/statsby.o: src/ui/statsby.h
 bin/main.o bin/ui/datapoints.o: src/ui/datapoints.h
 bin/main.o bin/ui/blankscreen.o: src/ui/blankscreen.h
 bin/main.o bin/ui/statrange.o: src/ui/statrange.h
+vin/main.o bin/ui/exportscreen.o: src/ui/exportscreen.h
+bin/main.o bin/drive.o bin/ui/exportscreen.o: src/drive.h
 
 .if "${DEFAULT_TEMP_UNIT}" != "F" && "${DEFAULT_TEMP_UNIT}" != "C" &&\
     "${DEFAULT_TEMP_UNIT}" != "c" && "${DEFAULT_TEMP_UNIT}" != "c"
@@ -58,6 +61,7 @@ ${OBJS}: ${.TARGET:C/^bin/src/:C/.o$/.c/}
 -DDEFAULT_DATABASE_LOCATION="\"${DEFAULT_DATABASE_LOCATION}\""\
 -DDEFAULT_REFRESH_TIME="${DEFAULT_REFRESH_TIME}"\
 -DDEFAULT_TEMP_UNIT="'${DEFAULT_TEMP_UNIT}'"\
+-DDEFAULT_EXPORT_FILE_NAME="\"${DEFAULT_EXPORT_FILE_NAME}\""\
 -o ${@} ${.TARGET:C/^bin/src/:C/.o$/.c/}
 
 clean: