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comparison loadtools/sercomm.c @ 49:54392d1ea474

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loadtools: first beginnings for the baud rate switching logic
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 23 Jun 2013 02:53:16 +0000
parents fea204bc7674
children f1df95eed62c
comparison
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48:38664e0b7c32 49:54392d1ea474
8 #include <sys/ioctl.h> 8 #include <sys/ioctl.h>
9 #include <termios.h> 9 #include <termios.h>
10 #include <stdio.h> 10 #include <stdio.h>
11 #include <stdlib.h> 11 #include <stdlib.h>
12 #include <unistd.h> 12 #include <unistd.h>
13 #include "baudrate.h"
13 14
14 char *target_ttydev; 15 char *target_ttydev;
15 int target_fd; 16 int target_fd;
16 struct termios target_termios; 17 struct termios target_termios;
18
19 struct baudrate baud_rate_table[] = {
20 /* the first listed rate will be our default */
21 {"115200", B115200, 0},
22 {"57600", B57600, 1},
23 {"38400", B38400, 2},
24 {"19200", B19200, 4},
25 /* non-standard high baud rates "remapped" by CP2102 usb2serial IC */
26 {"812500", B921600, -1},
27 {"406250", B460800, -1},
28 {"203125", B230400, -1},
29 /* table search terminator */
30 {NULL, B0, -1},
31 };
32 struct baudrate *current_baud_rate;
17 33
18 open_target_serial() 34 open_target_serial()
19 { 35 {
20 target_fd = open(target_ttydev, O_RDWR|O_NONBLOCK); 36 target_fd = open(target_ttydev, O_RDWR|O_NONBLOCK);
21 if (target_fd < 0) { 37 if (target_fd < 0) {
36 exit(1); 52 exit(1);
37 } 53 }
38 return 0; 54 return 0;
39 } 55 }
40 56
41 switch_baud_rate(code) 57 switch_baud_rate(br)
58 struct baudrate *br;
42 { 59 {
43 cfsetispeed(&target_termios, code); 60 cfsetispeed(&target_termios, br->termios_code);
44 cfsetospeed(&target_termios, code); 61 cfsetospeed(&target_termios, br->termios_code);
45 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) { 62 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) {
46 perror("tcsetattr to switch baud rate"); 63 perror("tcsetattr to switch baud rate");
47 exit(1); 64 exit(1);
48 } 65 }
66 current_baud_rate = br;
49 } 67 }