workaround the infamous select() bug : first milestone, demo code is coming

.gitignore

@@ -12,4 +12,7 @@ doc/*.idx
 doc/*.ilg
 doc/*.ind
 
+*/foo.dat
+
+
 

serial/Makefile

@@ -4,6 +4,9 @@ OPT = -Wall -DDEBUG_LEVEL=1
 serial.o:	serial.c serial.h Makefile
 	gcc ${OPT} -c $<
 
-t:	t.c serial.o Makefile
+funcs.o:	funcs.c serial.h Makefile
-	gcc ${OPT}  $< serial.o -o $@
+	gcc ${OPT} -c $<
+
+t:	t.c serial.o funcs.o Makefile
+	gcc ${OPT}  $< serial.o funcs.o -o $@
 

serial/funcs.c

@@ -0,0 +1,26 @@
+
+#include  <stdio.h>
+
+#include  "serial.h"
+
+extern int	verbosity;
+
+/* ---------------------------------------------------------------- */
+int parseXvalue(char *line, char cflag)
+{
+int	value, foo;
+int	vrd[4];
+
+value=0;
+
+foo = sscanf(data+1, "%d %d %d %d", vrd, vrd+1, vrd+2, vrd+3);
+fprintf(stderr, "sscanf -> %d\n", foo);
+if (4 != foo) {
+	return -666;
+	}
+for (foo=0; foo<4; foo++) {
+	value += vrd[foo];
+	}
+return value;
+}
+/* ---------------------------------------------------------------- */

serial/serial.c

@@ -148,7 +148,7 @@ FD_SET    (fd, &rfds);
 
 retval = select(1, &rfds, NULL, NULL, &timeout);
 #if DEBUG_LEVEL
-fprintf(stderr, "%s : select on %d -> %d\n", __func__, fd, retval);
+fprintf(stderr, "%s : select on fd %d -> %d\n", __func__, fd, retval);
 #endif
 
 switch (retval) {
@@ -187,12 +187,22 @@ int getline_to(int fd, char *where, int szm, int to_ms)
 {
 int	curpos, byte, retval;
 
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %d %p %d %d )\n", __func__,
+				fd, where, szm, to_ms);
+#endif
+
 curpos = 0;
 retval = -7;					/* magic number powa */
 where[0] = '\0';				/* erase all the bs  */
 
 for(;;)	{
+	if (to_ms) {
 		byte = getbyte_to (fd, to_ms);
+		}
+	else	{
+		byte = getbyte(fd);
+		}
 
 	if (byte < 0) {
 		fprintf(stderr, "%s : somthing is wrong %d\n", 
@@ -204,6 +214,7 @@ for(;;)	{
 	if ('\n' == byte) {			/* got an EOL ? */
 		where[curpos] = '\0';
 		retval = curpos;
+		break;
 		}
 
 	if (curpos < szm) {			/* ya de la place */

serial/serial.h

@@ -14,4 +14,8 @@ int getbyte_to (int fd, int to_ms);
 
 int getline_to(int fd, char *where, int szm, int to_ms);
 
+/* auxiliary and test functions */
+
+int parseXvalue(char *asciidatas, char id);
+
 

serial/t.c

@@ -17,10 +17,12 @@
 
 int	verbosity;
 
+/* ---------------------------------------------------------------- */
 /* ---------------------------------------------------------------- */
 int main (int argc, char *argv[])
 {
-int		serial_in, foo;
+int		serial_in, foo, count;
+char		ligne[200];
 
 if (2 != argc) {
 	fprintf(stderr, "give me a device name, please.\n");
@@ -31,17 +33,15 @@ serial_in = prepare_UART(argv[1], 9600);
 
 fprintf(stderr, "going to listen on %d\n", serial_in);
 
-for (;;) {
+for (count=0; count<10000; count++) {
-	foo = getbyte_to(serial_in, 50000);
+	foo = getline_to(serial_in, ligne, 100, 0);
-	if (foo < 0) {
+	fprintf(stderr, "getline #%d -> %d\n", count, foo);
-		fprintf(stderr, "get byte : got %d, err is %d\n",
+	fprintf(stderr, "%s\n", ligne);
-						foo, errno);
+	foo = parseXvalue(ligne);
-		}
+	fprintf(stderr, "parse -> %d\n", foo);
-	else	{
+	if (foo>= 0) {
-		printf("%9ld    $%02x  ", time(NULL), foo);
+		printf("%d %d\n", count, foo);
-		if (isprint(foo))	putchar(foo);
+		fflush(stdout);
-		puts("");
-		if ('\n'==foo) 	puts("");
 		}
 	}
 

simulator/send-random/send-random.ino

@@ -26,7 +26,7 @@ void updatevalues(void)
       values[foo] += (foo + 1);
       }
     if (values[foo] > 1023) {
-      values[foo] = rand()%15;
+      values[foo] = rand()%25;
       }
   }
 }
@@ -48,7 +48,7 @@ void sendvalues(void)
 void loop() {
   updatevalues();
   sendvalues();
-  delay(2500);
+  delay(800);
 }
 
 /* -------------------------------------------------- */