LD=ld
CFLAGS=-Wall -O2 -g -fPIC
-LOG-PLOTTER_OBJS = baud.o main.o
+LOG-PLOTTER_OBJS = baud.o main.o options.o
ALL_OBJS = $(LOG-PLOTTER_OBJS)
ALL_DEBS = $(patsubst %.o,.%.o.d,$(ALL_OBJS))
#include <unistd.h>
#include <sys/epoll.h>
+#include "options.h"
#include "baud.h"
int main(int argc, char *argv[])
{
struct epoll_event ev;
+ struct plotter_options options;
int fd, baud, ret;
int epoll_fd;
- char *device;
char buf[256];
- if (argc < 2) {
- printf("Usage: %s SERIAL_DEVICE\n", argv[0]);
- return 1;
- }
- baud = 128000;
- device = argv[1];
+ if (read_args(argc, argv, &options))
+ return 1;
- fd = open_at_baud(device, &baud);
+ baud = options.baud_rate;
+ fd = open_at_baud(options.device_path, &baud);
if (fd < 0)
return 1;
- if (baud != 128000) {
- printf("Failed to set baudrate to 128000, only got %d\n", baud);
+ if (baud != options.baud_rate) {
+ printf("Failed to set baudrate to %d, only got %d\n",
+ options.baud_rate, baud);
close(fd);
return 1;
}
--- /dev/null
+#include <getopt.h>
+#include <string.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "options.h"
+
+static void set_default_options(struct plotter_options *opts)
+{
+ bzero(opts, sizeof(*opts));
+
+ opts->baud_rate = 128000;
+ opts->device_path = "/dev/ttyUSB0";
+}
+
+int read_args(int argc, char *argv[], struct plotter_options *opts)
+{
+ int option_index = 0, c;
+ static struct option long_options[] = {
+ { .val = 'd', .name = "device", .has_arg = 1, },
+ { .val = 'o', .name = "output", .has_arg = 1 },
+ { .val = 'o', .name = "baud", .has_arg = 1 },
+ };
+ char short_options[] = "d:o:b:";
+
+ set_default_options(opts);
+
+ while (1) {
+ c = getopt_long(argc, argv, short_options, long_options,
+ &option_index);
+
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'd':
+ opts->device_path = optarg;
+ break;
+ case 'o':
+ opts->output_path = optarg;
+ break;
+ case 'b':
+ opts->baud_rate = atoi(optarg);
+ break;
+ case '?':
+ return -1;
+ }
+ }
+
+ while (optind < argc) {
+ /* The rest of the options, ignored */
+ optind++;
+ }
+
+ return 0;
+}