From ac7e8b2318a0e118d4cb7ced49d109c40908cb85 Mon Sep 17 00:00:00 2001
From: root <root@ka-ata-killa.ourano.james.local>
Date: Sun, 21 Mar 2021 00:24:14 +0000
Subject: fix content-type headers, and store a day's worth of weather data

---
 app/Makefile        |  6 +++--
 app/dcf77.c         |  2 ++
 app/httpd.c         | 19 ++++++++++------
 app/lwip/lwipopts.h |  2 ++
 app/meteotime.c     | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 app/prototypes.h    |  3 +++
 6 files changed, 88 insertions(+), 9 deletions(-)
 create mode 100644 app/meteotime.c

diff --git a/app/Makefile b/app/Makefile
index 224f182..fddc03b 100644
--- a/app/Makefile
+++ b/app/Makefile
@@ -21,15 +21,17 @@
 CPROTO=cproto
 PROG=clockv2
 
+
 LDSCRIPT = ${PROG}.ld
 
 V=1
 default: ${PROG}.elf
 
+
 CSRCS=led.c ticker.c ring.c usart.c stdio.c lwip_glue.c steth.c msf.c abs.c \
       pll.c main.c time_fn.c ntp.c dcf77.c util.c stats.c gps.c hexdump.c bits.c \
       max7219.c  report.c sysclk.c cdcacm.c usb.c dfu.c adc.c dummy_kb.c ref.c \
-      ptp.c display.c httpd.c alarm.c
+      ptp.c display.c httpd.c alarm.c meteotime.c
 
 HSRCS= events.h  gps.h  project.h  ring.h  steth.h  time_fn.h  ubx.h
 
@@ -162,7 +164,7 @@ almanac:
 	wget -O almanac.alp http://alp.u-blox.com/current_7d.alp
 
 
-EXTRA_CLEAN=${OBJS} ${LWIP_OBJS:%.o=%.d} almanac.c
+EXTRA_CLEAN=${OBJS} ${LWIP_OBJS:%.o=%.d} almanac.c *.orig
 
 tidy:
 	astyle -A3 -s2 --attach-extern-c -L -c -w -Y -m0 -f -p  -H -U -k3 -xj -xd ${CSRCS} ${HSRCS} 
diff --git a/app/dcf77.c b/app/dcf77.c
index 30cfd26..4b69a69 100644
--- a/app/dcf77.c
+++ b/app/dcf77.c
@@ -104,6 +104,8 @@ static void process_bits (uint64_t abs, uint64_t ptp)
   printf ("DCF77: Next minute is: %02d-%02d-%02d %02d:%02d\r\n", u.year, u.month, u.mday, u.hour, u.minute);
   time_print_epoch ("DCF77: ", e, dcf77_info);
 
+  meteotime_save(&u,bits);
+
   dump_bits ("dcf77", bits);
 }
 
diff --git a/app/httpd.c b/app/httpd.c
index 3fdea93..b3776c3 100644
--- a/app/httpd.c
+++ b/app/httpd.c
@@ -257,19 +257,24 @@ static const char *cgi_set_handler (int idx, int num_params, char *params[], cha
 
 int fs_open_custom (struct fs_file *file, const char *name)
 {
-  int len;
 
-  if (!strcmp (name, "/index.html"))
-    len = make_index();
-  else if (!strcmp (name, "/alarm.html"))
-    len = make_alarm();
+  if (!strcmp (name, "/index.html")) {
+  file->data = (const char *)html_buf;
+  file->len =  make_index();
+  }
+  else if (!strcmp (name, "/alarm.html")) {
+  	file->data = (const char *)html_buf;
+    file->len = make_alarm();
+  }
+  else if (!strcmp (name, "/meteotime.dat")) {
+  	file->data = (const char *)meteotime_data;
+	file->len=sizeof(meteotime_data);
+  }
   else {
     printf ("looking for url=%s, found nothing\n", name);
     return 0;
   }
 
-  file->data = (const char *)html_buf;
-  file->len = len;
   file->index = file->len;
   file->pextension = NULL;
   file->flags = 0;
diff --git a/app/lwip/lwipopts.h b/app/lwip/lwipopts.h
index b3e37c7..a44c06c 100644
--- a/app/lwip/lwipopts.h
+++ b/app/lwip/lwipopts.h
@@ -216,6 +216,8 @@ The STM32F4x7 allows computing and verifying the IP, UDP, TCP and ICMP checksums
 #define LWIP_HTTPD_CUSTOM_FILES 	1
 #define LWIP_HTTPD_FILE_STATE         0
 #define LWIP_HTTPD_CGI	         1
+#define LWIP_HTTPD_DYNAMIC_HEADERS 1
+#define HTTPD_ADDITIONAL_CONTENT_TYPES {"dat", HTTP_CONTENT_TYPE("application/octet-stream")}
 
 #define LWIP_IGMP 1
 #define LWIP_MDNS_RESPONDER 1
diff --git a/app/meteotime.c b/app/meteotime.c
new file mode 100644
index 0000000..5734a0b
--- /dev/null
+++ b/app/meteotime.c
@@ -0,0 +1,65 @@
+#include "project.h"
+
+#define BITS_PER_MIN 37
+#define MINS_PER_HOUR 60
+#define HOURS_PER_DAY 24
+
+#define N_BITS ((BITS_PER_MIN)*(MINS_PER_HOUR)*(HOURS_PER_DAY))
+
+#define BITS_PER_WORD 32
+
+#define N_WORDS	(((N_BITS)+(BITS_PER_WORD-1))/(BITS_PER_WORD))
+
+
+#define M1 (~0UL)
+#define M2 ((1UL << (BITS_PER_MIN - BITS_PER_WORD))-1)
+
+uint32_t meteotime_data[N_WORDS];
+
+void meteotime_save(UTC *u, uint8_t *bits)
+{
+uint32_t c;
+uint32_t d1;
+uint32_t d2;
+
+unsigned i;
+unsigned word;
+unsigned bit;
+unsigned ibit;
+
+
+//0-13
+for (d1=0,c=1,i=1;i<15;++i,c<<=1)
+	if (bits[i]) d1|=c;
+
+//14
+if (bits[17]) d1|=c;
+c<<=1;
+
+//15-31
+for (i=36;i<53;++i,c<<=1)
+	if (bits[i]) d1|=c;
+
+//0-4
+for (d2=0,c=1,i=53;i<58;++i,c<<=1)
+	if (bits[i]) d2|=c;
+
+bit=u->hour;
+bit*=60;
+bit+=u->minute;
+bit*=BITS_PER_MIN;
+
+word=bit/BITS_PER_WORD;
+bit=bit & (BITS_PER_WORD -1);
+ibit=BITS_PER_WORD-bit;
+
+
+meteotime_data[word] &=~(M1 << bit);
+meteotime_data[word] |=(d1 << bit);
+
+word++;
+
+meteotime_data[word] &=~((M1 >> ibit) |(M2 <<bit));
+meteotime_data[word] |=(d1 >> ibit) | (d2 <<bit);
+
+}
diff --git a/app/prototypes.h b/app/prototypes.h
index e1164bf..e502fd9 100644
--- a/app/prototypes.h
+++ b/app/prototypes.h
@@ -206,3 +206,6 @@ extern void cgi_init(void);
 /* alarm.c */
 extern EPOCH alarm;
 extern void alarm_dispatch(void);
+/* meteotime.c */
+extern uint32_t meteotime_data[(((((37)*(60)*(24)))+(32 -1))/(32))];
+extern void meteotime_save(UTC *u, uint8_t *bits);
-- 
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