FreeCalypso > hg > freecalypso-tools
view loadtools/sercomm.c @ 127:db7fc16bac1e
fc-tmsh: implemented reading of Tx ramp template files
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 19 Feb 2017 15:59:56 +0000 |
parents | e7502631a0f9 |
children | e7d5ce499693 |
line wrap: on
line source
/* * This module handles the establishment of serial communication * with the target, i.e., the host-side termios stuff. */ #include <sys/types.h> #include <sys/file.h> #include <sys/ioctl.h> #include <termios.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <unistd.h> #include "baudrate.h" char *target_ttydev; int target_fd; struct termios target_termios; struct baudrate baud_rate_table[] = { /* the first listed rate will be our default */ {"115200", B115200, 0}, {"57600", B57600, 1}, {"38400", B38400, 2}, {"19200", B19200, 4}, /* non-standard high baud rates "remapped" by CP2102 usb2serial IC */ {"812500", B921600, -1}, {"406250", B460800, -1}, {"203125", B230400, -1}, /* table search terminator */ {NULL, B0, -1}, }; struct baudrate *current_baud_rate; open_target_serial() { target_fd = open(target_ttydev, O_RDWR|O_NONBLOCK); if (target_fd < 0) { perror(target_ttydev); exit(1); } target_termios.c_iflag = IGNBRK; target_termios.c_oflag = 0; target_termios.c_cflag = CLOCAL|HUPCL|CREAD|CS8; target_termios.c_lflag = 0; target_termios.c_cc[VMIN] = 1; target_termios.c_cc[VTIME] = 0; /* start at B19200, as that's what we'll need to use initially */ cfsetispeed(&target_termios, B19200); cfsetospeed(&target_termios, B19200); if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) { perror("initial tcsetattr on target"); exit(1); } return 0; } struct baudrate * find_baudrate_by_name(srch_name) char *srch_name; { struct baudrate *br; for (br = baud_rate_table; br->name; br++) if (!strcmp(br->name, srch_name)) break; if (br->name) return(br); else { fprintf(stderr, "error: baud rate \"%s\" not known\n", srch_name); return(NULL); } } switch_baud_rate(br) struct baudrate *br; { cfsetispeed(&target_termios, br->termios_code); cfsetospeed(&target_termios, br->termios_code); if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) { perror("tcsetattr to switch baud rate"); exit(1); } current_baud_rate = br; }