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Add line response feature

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Add a simple line response feature to make it possible to send e.g. a
command string to your serial device and easily receive and parse a line
response.

This is a convenience feature for simple request/response interaction
based on lines. For more advanced interaction the socket feature should
be used instead.

The line response feature is detailed via the following options:

 -r, --response-wait

Wait for line response then quit. A line is considered any string ending
with either CR or NL character. If no line is received tio will quit
after response timeout.

Any tio text is automatically muted when piping a string to tio while in
response mode to make it easy to parse the response.

 --response-timeout <ms>

Set timeout [ms] of line response (default: 100).

Example:

Sending a string (SCPI command) to a test instrument (Korad PSU) and
print line response:

 $ echo "*IDN?" | tio /dev/ttyACM0 --response-wait
 KORAD KD3305P V4.2 SN:32477045
This commit is contained in:
Martin Lund 2022-08-13 00:04:00 +02:00
parent a75e04b883
commit e837fd0303
9 changed files with 143 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/options.c
View file

@ -43,6 +43,7 @@ enum opt_t
OPT_LOG_FILE,
OPT_LOG_STRIP,
OPT_LINE_PULSE_DURATION,
OPT_RESPONSE_TIMEOUT,
};
/* Default options */
@ -74,6 +75,9 @@ struct option_t option =
.hex_mode = false,
.prefix_code = 20, // ctrl-t
.prefix_key = 't',
.response_wait = false,
.response_timeout = 100,
.mute = false,
};
void print_help(char *argv[])
@ -103,6 +107,8 @@ void print_help(char *argv[])
printf(" -c, --color 0..255|bold|none|list Colorize tio text (default: bold)\n");
printf(" -S, --socket <socket> Redirect I/O to file or network socket\n");
printf(" -x, --hexadecimal Enable hexadecimal mode\n");
printf(" -r, --response-wait Wait for line response then quit\n");
printf(" --response-timeout <ms> Response timeout (default: 100)\n");
printf(" -v, --version Display version\n");
printf(" -h, --help Display help\n");
printf("\n");
@ -287,6 +293,8 @@ void options_parse(int argc, char *argv[])
{"map", required_argument, 0, 'm' },
{"color", required_argument, 0, 'c' },
{"hexadecimal", no_argument, 0, 'x' },
{"response-wait", no_argument, 0, 'r' },
{"response-timeout", required_argument, 0, OPT_RESPONSE_TIMEOUT },
{"version", no_argument, 0, 'v' },
{"help", no_argument, 0, 'h' },
{0, 0, 0, 0 }
@ -296,7 +304,7 @@ void options_parse(int argc, char *argv[])
int option_index = 0;
/* Parse argument using getopt_long */
c = getopt_long(argc, argv, "b:d:f:s:p:o:O:netLlS:m:c:xvh", long_options, &option_index);
c = getopt_long(argc, argv, "b:d:f:s:p:o:O:netLlS:m:c:xrvh", long_options, &option_index);
/* Detect the end of the options */
if (c == -1)
@ -421,6 +429,14 @@ void options_parse(int argc, char *argv[])
option.hex_mode = true;
break;
case 'r':
option.response_wait = true;
break;
case OPT_RESPONSE_TIMEOUT:
option.response_timeout = string_to_long(optarg);
break;
case 'v':
printf("tio v%s\n", VERSION);
exit(EXIT_SUCCESS);