serial : a small test main()
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@ -92,6 +92,9 @@ ne demande qu'à grandir.
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\subsection{Analyses}
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% -------------------------------------------------------------------
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\section{influxdb} \label{influxdb}
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@ -14,7 +14,11 @@ purpose-built platform that InfluxData provides._
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# On essaye ?
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Ok, c'est parti. On va écrire un injecteur en Perl.
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Ok, c'est parti. On va écrire un injecteur en Perl. Puis enchainer sur
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une visualisation dynamique des données en lancer de rayon.
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Projet ambitieux ? Non, la suite sera bien pire.
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@ -3,3 +3,6 @@
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use strict;
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print "injecteur v 0\n";
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0;
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@ -1,9 +1,9 @@
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OPT = -Wall -DDEBUG_LEVEL=1
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serial.o: serial.c serial.h Makefile
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gcc -Wall -c $<
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gcc ${OPT} -c $<
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t: t.c serial.o Makefile
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gcc -Wall $< serial.o -o $@
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gcc ${OPT} $< serial.o -o $@
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@ -1,6 +1,7 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/select.h>
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#include <unistd.h> //Used for UART
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#include <fcntl.h> //Used for UART
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#include <termios.h> //Used for UART
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@ -84,7 +85,7 @@ if (uart0== -1)
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baudbits = baudrate2const(baudrate);
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#if DEBUG_LEVEL
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fprintf(stderr, "%d -> %x\n", baudrate, baudbits);
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fprintf(stderr, "%d -> 0x%04x\n", baudrate, baudbits);
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#endif
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tcgetattr(uart0, &options);
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options.c_cflag = baudbits | CS8 | CLOCAL | CREAD; //<Set baud rate
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@ -98,7 +99,7 @@ return uart0;
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}
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/* -------------------------------------------------------------------- */
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/*
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* maybe we have to check for timeout ?
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* this function have NO timeout !
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*/
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int getbyte(int fd)
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{
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@ -115,3 +116,24 @@ return (int)byte;
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}
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/* -------------------------------------------------------------------- */
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/* timeout is in milliseconds */
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int getbyte_to (int fd, int to_ms)
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{
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unsigned char byte;
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struct timeval timeout;
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timeout.tv_sec = to_ms / 1000;
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timeout.tv_usec = (to_ms % 1000) * 1000;
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#if DEBUG_LEVEL
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fprintf(stderr, "timeout %6d is %4ld %6ld\n", to_ms,
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timeout.tv_sec, timeout.tv_usec);
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#endif
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return -3;
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}
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/* -------------------------------------------------------------------- */
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@ -1,8 +1,15 @@
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/*
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* serial.h
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* --------
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*
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*/
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int prepare_UART(char *port, int bauds);
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int getbyte(int fd);
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/* timeout is exprimed in milliseconds. */
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int getbyte_to (int fd, int to_ms);
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12
serial/t.c
12
serial/t.c
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@ -7,14 +7,20 @@
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int main (int argc, char *argv[])
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{
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int serial_in;
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int byte, foo;
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int byte, foo, to;
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serial_in = prepare_UART("/dev/ttyS0", 9600);
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fprintf(stderr, "prepare uart -> %d\n", serial_in);
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for (foo=0; foo<20; foo++) {
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byte = getbyte(serial_in);
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printf("%6d %02x\n", foo, byte);
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to = (foo+1) * 666;
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byte = getbyte_to(serial_in, to);
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if (byte < 0) {
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fprintf(stderr, "get byte : err is %d\n", byte);
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}
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else {
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printf("%6d %6d %02x\n", foo, to, byte);
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}
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}
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return 0;
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