serial : a small test main()

This commit is contained in:
tth 2018-12-12 20:07:49 +01:00
parent 933365b883
commit cda7b7f45e
7 changed files with 54 additions and 9 deletions

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@ -92,6 +92,9 @@ ne demande qu'à grandir.
\subsection{Analyses} \subsection{Analyses}
% -------------------------------------------------------------------
\section{influxdb} \label{influxdb}

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@ -14,7 +14,11 @@ purpose-built platform that InfluxData provides._
# On essaye ? # On essaye ?
Ok, c'est parti. On va écrire un injecteur en Perl. Ok, c'est parti. On va écrire un injecteur en Perl. Puis enchainer sur
une visualisation dynamique des données en lancer de rayon.
Projet ambitieux ? Non, la suite sera bien pire.

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@ -3,3 +3,6 @@
use strict; use strict;
print "injecteur v 0\n"; print "injecteur v 0\n";
0;

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

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@ -1,6 +1,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/select.h>
#include <unistd.h> //Used for UART #include <unistd.h> //Used for UART
#include <fcntl.h> //Used for UART #include <fcntl.h> //Used for UART
#include <termios.h> //Used for UART #include <termios.h> //Used for UART
@ -84,7 +85,7 @@ if (uart0== -1)
baudbits = baudrate2const(baudrate); baudbits = baudrate2const(baudrate);
#if DEBUG_LEVEL #if DEBUG_LEVEL
fprintf(stderr, "%d -> %x\n", baudrate, baudbits); fprintf(stderr, "%d -> 0x%04x\n", baudrate, baudbits);
#endif #endif
tcgetattr(uart0, &options); tcgetattr(uart0, &options);
options.c_cflag = baudbits | CS8 | CLOCAL | CREAD; //<Set baud rate options.c_cflag = baudbits | CS8 | CLOCAL | CREAD; //<Set baud rate
@ -98,7 +99,7 @@ return uart0;
} }
/* -------------------------------------------------------------------- */ /* -------------------------------------------------------------------- */
/* /*
* maybe we have to check for timeout ? * this function have NO timeout !
*/ */
int getbyte(int fd) int getbyte(int fd)
{ {
@ -115,3 +116,24 @@ return (int)byte;
} }
/* -------------------------------------------------------------------- */ /* -------------------------------------------------------------------- */
/* timeout is in milliseconds */
int getbyte_to (int fd, int to_ms)
{
unsigned char byte;
struct timeval timeout;
timeout.tv_sec = to_ms / 1000;
timeout.tv_usec = (to_ms % 1000) * 1000;
#if DEBUG_LEVEL
fprintf(stderr, "timeout %6d is %4ld %6ld\n", to_ms,
timeout.tv_sec, timeout.tv_usec);
#endif
return -3;
}
/* -------------------------------------------------------------------- */

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@ -1,8 +1,15 @@
/* /*
* serial.h * serial.h
* --------
*
*/ */
int prepare_UART(char *port, int bauds); int prepare_UART(char *port, int bauds);
int getbyte(int fd); int getbyte(int fd);
/* timeout is exprimed in milliseconds. */
int getbyte_to (int fd, int to_ms);

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@ -7,14 +7,20 @@
int main (int argc, char *argv[]) int main (int argc, char *argv[])
{ {
int serial_in; int serial_in;
int byte, foo; int byte, foo, to;
serial_in = prepare_UART("/dev/ttyS0", 9600); serial_in = prepare_UART("/dev/ttyS0", 9600);
fprintf(stderr, "prepare uart -> %d\n", serial_in); fprintf(stderr, "prepare uart -> %d\n", serial_in);
for (foo=0; foo<20; foo++) { for (foo=0; foo<20; foo++) {
byte = getbyte(serial_in); to = (foo+1) * 666;
printf("%6d %02x\n", foo, byte); byte = getbyte_to(serial_in, to);
if (byte < 0) {
fprintf(stderr, "get byte : err is %d\n", byte);
}
else {
printf("%6d %6d %02x\n", foo, to, byte);
}
} }
return 0; return 0;