version stuff

src/Makefile

@@ -5,15 +5,21 @@ LDFLAGS=-lwiringPi -lcurl -lconfig
 
 INST_DIR=/opt/sbin
 
-counter:	counter.o LS7366R.o influx.o ringbuffer.o led.o logging.o
-	$(CC) -o $@ $(LDFLAGS) $^
-
-.c.o:
-	$(CC) $(CFLAGS) -c $<
+REFCNT:=$(shell git rev-list --all --count) 
+VERSION:=$(shell cat VERSION)
 
 .PHONY: all
 all:	counter
 
+counter:	counter.o LS7366R.o influx.o ringbuffer.o led.o logging.o version.o
+	$(CC) -o $@ $(LDFLAGS) $^
+
+version.o:	version.c VERSION
+	$(CC) -DD_REFCNT=$(REFCNT) -DD_VERSION=\"$(VERSION)\" -c $<
+
+.c.o:
+	$(CC) $(CFLAGS) -c $<
+
 .PHONY: clean
 clean:
 	-rm -f *.o counter
@@ -31,4 +37,10 @@ install:
 	sudo systemctl enable $(INST_DIR)/counter.service
 	sudo systemctl start counter
 
+.PHONY: stop
+stop:
+	sudo systemctl stop counter
 
+.PHONY: start
+start:
+	sudo systemctl start counter

src/VERSION

@@ -0,0 +1 @@
+0.94

src/counter.c

@@ -14,6 +14,9 @@
 #include "logging.h"
 
 
+extern char VERSION[];
+extern uint32_t REFCNT;
+
 const int CTRL_OUT = 16;
 const int INTR_IN  = 19;
 const int SPI_CHAN = 0;
@@ -66,6 +69,7 @@ void start() {
 }
 
 int main (void) {
+  fprintf(stderr, "VERSION: %s, REFCNT: %u\n", VERSION, REFCNT);
 
   readConfig();
   init();
@@ -93,7 +97,7 @@ int main (void) {
 
     double gradient = f - lastF;
     if (settled && (fabs(gradient) > epsilon)) {
-      logmsg(LOG_INFO, "Current f=%f, last f=%f, gradient too large, invalid\n", f, lastF);
+      logmsg(LOG_INFO, "Current f=%f, last f=%f, gradient %f too large, invalid\n", f, lastF, gradient);
       skipped++;
       f = lastF;
       valid = 0;

src/version.c

@@ -0,0 +1,6 @@
+#include <stdint.h>
+
+const uint32_t REFCNT = D_REFCNT;
+const char VERSION[] = D_VERSION;
+
+