select in 'get_byte_to' don't work
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4eed817ecb
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560edb14e8
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@ -86,7 +86,7 @@ if (uart0 < 0)
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baudbits = baudrate2const(baudrate);
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#if DEBUG_LEVEL
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#if DEBUG_LEVEL > 1
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fprintf(stderr, "%d -> 0x%04x\n", baudrate, baudbits);
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#endif
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@ -97,6 +97,9 @@ options.c_cflag = baudbits | CS8 | CLOCAL | CREAD;
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options.c_iflag = IGNPAR;
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options.c_oflag = 0;
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options.c_lflag = 0;
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options.c_cc[VMIN] = 1; /* ask for blocking read */
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tcflush(uart0, TCIFLUSH);
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tcsetattr(uart0, TCSANOW, &options);
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@ -133,9 +136,9 @@ struct timeval timeout;
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fd_set rfds;
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int retval;
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timeout.tv_sec = to_ms / 1000;
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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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#if DEBUG_LEVEL > 1
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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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@ -145,7 +148,7 @@ FD_SET (fd, &rfds);
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retval = select(1, &rfds, NULL, NULL, &timeout);
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#if DEBUG_LEVEL
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fprintf(stderr, "%s : select -> %d\n", __func__, retval);
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fprintf(stderr, "%s : select on %d -> %d\n", __func__, fd, retval);
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#endif
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switch (retval) {
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@ -156,7 +159,8 @@ switch (retval) {
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break;
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case 0:
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fprintf(stderr, "timeout\n");
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fprintf(stderr, "timeout %ld.%ld\n",
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timeout.tv_sec, timeout.tv_usec);
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retval = -99;
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break;
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51
serial/t.c
51
serial/t.c
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@ -1,4 +1,7 @@
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/*
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* Experiments with the serial input
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <stdio.h>
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#include <stdlib.h>
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@ -14,63 +17,35 @@
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int verbosity;
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/* ----------------------------------------------------- */
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int openserial(char *dev)
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{
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int uart;
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fprintf(stderr, "%s ( %s )\n", __func__, dev);
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uart = open(dev, O_RDONLY | O_NOCTTY);
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if (uart < 0)
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{
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perror("unable to open uart");
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exit(1);
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}
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return uart;
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}
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/* ----------------------------------------------------- */
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int configserial(int fd)
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{
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struct termios tios;
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bzero(&tios, sizeof(tios));
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tios.c_cflag = B9600 | CRTSCTS | CS8 | CLOCAL | CREAD;
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tios.c_lflag = ICANON;
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tios.c_cc[VMIN] = 1; /* read bloquant ??? */
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tcsetattr(fd,TCSANOW,&tios);
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return 0;
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}
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/* ----------------------------------------------------- */
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/* ---------------------------------------------------------------- */
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int main (int argc, char *argv[])
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{
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int serial_in, foo;
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unsigned char byte;
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if (2 != argc) {
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fprintf(stderr, "give me a device name, please.\n");
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return 2;
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}
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serial_in = openserial(argv[1]);
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fprintf(stderr, "openserial -> %d\n", serial_in);
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(void)configserial(serial_in);
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serial_in = prepare_UART(argv[1], 9600);
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fprintf(stderr, "going to listen on %d\n", serial_in);
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for (;;) {
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foo = read(serial_in, &byte, 1);
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if (1 != foo) {
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foo = getbyte_to(serial_in, 50000);
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if (foo < 0) {
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fprintf(stderr, "get byte : got %d, err is %d\n",
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foo, errno);
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}
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else {
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printf("%9ld $%02x ", time(NULL), byte);
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if (isprint(byte)) putchar(byte);
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printf("%9ld $%02x ", time(NULL), foo);
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if (isprint(foo)) putchar(foo);
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puts("");
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if ('\n'==byte) puts("");
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if ('\n'==foo) puts("");
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}
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}
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return 0;
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}
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/* ----------------------------------------------------- */
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/* ---------------------------------------------------------------- */
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