From 15c6cbd8aea47cdab3b58f4614c54fd1b9538357 Mon Sep 17 00:00:00 2001
From: tth <sigfood@dinorama.fr>
Date: Mon, 28 Jan 2019 14:42:33 +0100
Subject: [PATCH] working on serial protocol

---
 serial/README.md |  2 ++
 serial/essai.sh  |  8 ++++----
 serial/funcs.c   | 13 ++++++++++++-
 serial/serial.h  |  2 +-
 serial/t.c       |  7 ++++++-
 5 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/serial/README.md b/serial/README.md
index a89a80a..7d76e1e 100644
--- a/serial/README.md
+++ b/serial/README.md
@@ -28,6 +28,8 @@ ne bloque pas, c'est un peu ironique.
 
 Après un peu plus d'investigation, j'en arrive à conclure qu'il y a
 plein de subtilités entre les diverses variantes d'Arduino. Mais pas que.
+Je pense que les quatre ports série supplémentaires de l'Arduino Mega
+seront moins capricieux.
 
 
 
diff --git a/serial/essai.sh b/serial/essai.sh
index 2526c3e..6c5d337 100755
--- a/serial/essai.sh
+++ b/serial/essai.sh
@@ -5,18 +5,18 @@ DATAFILE="foo.dat"
 TMPFILE="/tmp/dd2data"
 
 IMAGE="graphe.png"
-NB_READ=25000
+NB_READ=25
 
-./t -v -n ${NB_READ} -d ${DEVICE} | tee -a ${DATAFILE}
+./t -vv -n ${NB_READ} -d ${DEVICE} | tee -a ${DATAFILE}
 
 gnuplot << __EOC__
 set term png 	size 3200,512
 set output 	"${IMAGE}"
 set grid
-set title	"Dans le Double Dragon 2"
+set title	"Temperature dans le Double Dragon 2"
 set xdata 	time
 set timefmt 	"%s"
-set format x 	"%H:%M:%S"
+set format x 	"%a, %H:%M:%S"
 set yrange [ 5.0 : 30.0]
 plot	"${DATAFILE}" using 1:2 title " foo" with lines, \
 	"${DATAFILE}" using 1:3 title " bar" with lines, \
diff --git a/serial/funcs.c b/serial/funcs.c
index bc59658..cfd1808 100644
--- a/serial/funcs.c
+++ b/serial/funcs.c
@@ -7,6 +7,10 @@
 extern int	verbosity;
 
 /* ---------------------------------------------------------------- */
+/*
+ *	compute the integer mean value of a four values
+ *	tagged lines.
+ */
 int parseXvalue(char *line, char cflag)
 {
 int	value, foo;
@@ -32,10 +36,17 @@ if (4 != foo) {
 for (foo=0; foo<4; foo++) {
 	value += vrd[foo];
 	}
+
+value /= 4;
+
 return value;
 }
 /* ---------------------------------------------------------------- */
-int values2temps(float array[4])
+/*
+ *   this fonction is specific to the LM35 thermo-sensor
+ *   connected to a ADC pin of an Arduino Mega
+ */
+int values2temperature(float array[4])
 {
 int	foo;
 for (foo=0; foo<4; foo++) {
diff --git a/serial/serial.h b/serial/serial.h
index 158a2d1..bf6977c 100644
--- a/serial/serial.h
+++ b/serial/serial.h
@@ -17,7 +17,7 @@ int getline_to(int fd, char *where, int szm, int to_ms);
 /* auxiliary and test functions */
 
 int parseXvalue(char *asciidatas, char id);
-int values2temps(float array[4]);
+int values2temperature(float array[4]);
 
 int parse4values(char *line, char cflag, float array[4]);
 
diff --git a/serial/t.c b/serial/t.c
index eed23c6..69af8a7 100644
--- a/serial/t.c
+++ b/serial/t.c
@@ -37,7 +37,7 @@ for (count=0; count<iters; count++) {
 	// 
 	if (foo >= 0) {
 		temps = time(NULL);
-		values2temps(datas);
+		values2temperature(datas);
 		printf("%ld %f %f %f %f\n", temps,
 				datas[0], datas[1], datas[2], datas[3]);
 		fflush(stdout);
@@ -75,6 +75,11 @@ while ((opt = getopt(argc, argv, "d:n:v")) != -1) {
 
 	}
 
+if (verbosity) {
+	fprintf(stderr, "Testing Serial Software - compiled "	\
+				__DATE__ " " __TIME__ "\n");
+	}
+
 serial_in = prepare_UART(device, speed);
 if (serial_in < 0) {
 	fprintf(stderr, "%s : open device : error %d on %s\n",