reading 4 values from arduino

.gitignore

@@ -15,6 +15,6 @@ doc/*.ind
 */*.dat
 
 rrdb/*.png
-
+serial/*.png
 
 

serial/essai.sh

@@ -1,10 +1,25 @@
 #!/bin/bash
 
 DEVICE="/dev/ttyACM0"
+DATAFILE="foo.dat"
+IMAGE="graphe.png"
+NB_READ=1000
+
+./t -n ${NB_READ} -d ${DEVICE} | tee -a ${DATAFILE}
+
+gnuplot << __EOC__
+set term png 	size 1024,512
+set output 	"${IMAGE}"
+set grid
+set xdata 	time
+set timefmt 	"%s"
+set format x 	"%H:%M:S"
+plot	"${DATAFILE}" using 1:2 title "foo" with lines,	\
+	"${DATAFILE}" using 1:3 title "bar" with lines,	\
+	"${DATAFILE}" using 1:4 title "quux" with lines, \
+	"${DATAFILE}" using 1:5 title "booz" with lines
+__EOC__
+
+# display ${IMAGE}
+
 
-for p in {0..15}
-do
-	echo pass $p
-	./t ${DEVICE} | tee -a foo.dat
-	sleep 8
-done

serial/funcs.c

@@ -1,5 +1,6 @@
 
 #include  <stdio.h>
+#include  <string.h>
 
 #include  "serial.h"
 
@@ -15,7 +16,7 @@ value=0;
 
 if ( cflag != *line ) {
 	if (verbosity) {
-		fprintf(stderr, "%s line[0] 0x%x bad\n",
+		fprintf(stderr, "%s : line[0] 0x%x bad\n",
 					__func__, *line);
 		}
 	return -777;
@@ -36,8 +37,26 @@ return value;
 /* ---------------------------------------------------------------- */
 int parse4values(char *line, char cflag, float array[4])
 {
+float		ftmp[4];
+int		foo;
 
-
+if ( cflag != *line ) {
+	if (verbosity) {
+		fprintf(stderr, "%s : line[0] 0x%x bad\n",
+					__func__, *line);
+		}
 	return -777;
 	}
+
+foo = sscanf(line+1, "%f %f %f %f", ftmp, ftmp+1, ftmp+2, ftmp+3);
+if (4 != foo) {
+	fprintf(stderr, "%s : sscanf -> %d\n", __func__, foo);
+	return -666;
+	}
+// fprintf(stderr, "\tV %f\n", ftmp[0]);
+
+memcpy(array, ftmp, 4*sizeof(float));
+
+return 4;
+}
 /* ---------------------------------------------------------------- */

serial/serial.c

@@ -41,7 +41,7 @@ int		baudbits;
 struct termios	options;
 
 #if DEBUG_LEVEL
-fprintf(stderr, "%s ( %s %d )\n", __func__, port, baudrate);
+fprintf(stderr, ">>> %s ( %s %d )\n", __func__, port, baudrate);
 #endif
 // OPEN THE UART
 // The flags (defined in fcntl.h):
@@ -103,6 +103,8 @@ options.c_cc[VMIN] = 1;			/* ask for blocking read */
 tcflush(uart0, TCIFLUSH);
 tcsetattr(uart0, TCSANOW, &options);
 
+tcflush(uart0, TCIFLUSH);		/* do it again, sam */
+
 return uart0;
 }
 /* -------------------------------------------------------------------- */

serial/t.c

@@ -24,6 +24,7 @@ int loop(int sfd, int iters)
 int		count, foo;
 long		temps;
 char		ligne[200];
+float		datas[4];
 
 for (count=0; count<iters; count++) {
 	foo = getline_to(sfd, ligne, 100, 0);
@@ -32,16 +33,18 @@ for (count=0; count<iters; count++) {
 		fprintf(stderr, "getline #%d -> %d\n", count, foo);
 		fprintf(stderr, "%s\n", ligne);
 		}
-	foo = parseXvalue(ligne, 'X');
+	foo = parse4values(ligne, 'X', datas);
 	// 
 	if (foo >= 0) {
 		temps = time(NULL);
-		printf("%ld %d\n", temps, foo);
+		printf("%ld %f %f %f %f\n", temps,
+				datas[0], datas[1], datas[2], datas[3]);
 		fflush(stdout);
 		}
 	else	{
 		fprintf(stderr, "%s: parse -> %d\n", __func__, foo);
 		}
+	if (verbosity) fprintf(stderr, "\n");
 	}
 return 0;
 }

simulator/send-random/send-random.ino

@@ -5,6 +5,7 @@
 /* -------------------------------------------------- */
 
 #define NBVAL   4
+#define DELAI   1664
 
 int   values[NBVAL];
 
@@ -48,7 +49,7 @@ void sendvalues(void)
 void loop() {
   updatevalues();
   sendvalues();
-  delay(800);
+  delay(DELAI);
 }
 
 /* -------------------------------------------------- */