FreeCalypso > hg > freecalypso-tools
view rfcal/cmu200/sertool.c @ 215:1a658ab756fe
doc/Loadtools-on-GTA0x article added, replacing the corresponding section
of the old loadtools/README file
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 19 May 2017 06:57:19 +0000 |
parents | 219ae678b955 |
children |
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/* * This module contains the main() function for fc-serscpi, a manual tool * intended for learning how to control the CMU200 with SCPI commands * over RS-232. */ #include <sys/types.h> #include <sys/errno.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <strings.h> extern int errno; int target_fd; static void safe_output(buf, cc) u_char *buf; { int i, c; for (i = 0; i < cc; i++) { c = buf[i]; if (c == '\r' || c == '\n' || c == '\t' || c == '\b') { putchar(c); continue; } if (c & 0x80) { putchar('M'); putchar('-'); c &= 0x7F; } if (c < 0x20) { putchar('^'); putchar(c + '@'); } else if (c == 0x7F) { putchar('^'); putchar('?'); } else putchar(c); } fflush(stdout); } main(argc, argv) char **argv; { char buf[BUFSIZ]; fd_set fds, fds1; register int i, cc, max; if (argc != 3) { fprintf(stderr, "usage: %s ttyname baudrate\n", argv[0]); exit(1); } open_target_serial(argv[1], argv[2]); set_serial_nonblock(0); FD_ZERO(&fds); FD_SET(0, &fds); FD_SET(target_fd, &fds); max = target_fd + 1; for (;;) { bcopy(&fds, &fds1, sizeof(fd_set)); i = select(max, &fds1, NULL, NULL, NULL); if (i < 0) { if (errno == EINTR) continue; perror("select"); exit(1); } if (FD_ISSET(0, &fds1)) { cc = read(0, buf, sizeof buf); if (cc <= 0) exit(0); write(target_fd, buf, cc); } if (FD_ISSET(target_fd, &fds1)) { cc = read(target_fd, buf, sizeof buf); if (cc <= 0) { fprintf(stderr, "EOF/error on target tty\n"); exit(1); } safe_output(buf, cc); } } }