Attachment 190667 Details for Bug 225932 – pattern generator for frequency measurements

pattern generator for frequency measurements

sendF0.cc (text/plain), 1.30 KB, created by Gabor Simon on 2018-02-15 19:55:25 UTC

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Creator: Gabor Simon

Created: 2018-02-15 19:55:25 UTC

Size: 1.30 KB

patch

obsolete

>#include <fcntl.h>
>#include <stdint.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <sys/stat.h>
>#include <sys/types.h>
>#include <unistd.h>
>#include <termios.h>
>#include <errno.h>
>
>int
>main(int argc, char **argv) {
>    int res;
>    struct termios tio;
>
>    int fd_serial = open("/dev/ttyU1", O_RDWR | O_NONBLOCK | O_NOCTTY);
>    memset(&tio, 0, sizeof(struct termios));
>    tio.c_iflag = INPCK | IGNPAR;
>    tio.c_oflag = 0;
>    tio.c_cflag = CREAD | CS8;
>    tio.c_lflag = 0;
>    memset(tio.c_cc, 0, sizeof(tio.c_cc));
>    tio.c_cc[VMIN] = 1;
>    tio.c_cc[VTIME] = 0;
>
>    if (argc > 1)
>        tio.c_ispeed = tio.c_ospeed = strtoul(argv[1], NULL, 0);
>    else
>        tio.c_ispeed = tio.c_ospeed = 9600;
>
>    res = tcsetattr(fd_serial, TCSANOW, &tio);
>    printf("tcsetattr: %d, err=%s, spd=0x%08x=%u\n", res, strerror(errno), tio.c_ospeed, tio.c_ospeed);
>    memset(&tio, 0, sizeof(struct termios));
>    res = tcgetattr(fd_serial, &tio);
>    printf("tcgetattr: %d, ispd=%u, ospd=%u\n", res, tio.c_ispeed, tio.c_ospeed);
>
>    uint8_t values[1<<20];
>    //memset(values, 0x55, sizeof(values)); // baudrate = freq * 5/10 = freq / 2
>    memset(values, 0xf0, sizeof(values)); // baudrate = freq * 1/10
>    while (1) {
>        write(fd_serial, values, sizeof(values));
>    }
>
>    close(fd_serial);
>    return 0;
>}

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Attachments on bug 225932: 190665 | 190666 | 190667