FreeCalypso > hg > freecalypso-sw

annotate rvinterf/lowlevel/openport.c @ 923:10b4bed10192

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gsm-fw/L1: fix for the DSP patch corruption bug The L1 code we got from the LoCosto fw contains a feature for DSP CPU load measurement. This feature is a LoCosto-ism, i.e., not applicable to earlier DBB chips (Calypso) with their respective earlier DSP ROMs. Most of the code dealing with that feature is conditionalized as #if (DSP >= 38), but one spot was missed, and the MCU code was writing into an API word dealing with this feature. In TCS211 this DSP API word happens to be used by the DSP code patch, hence that write was corrupting the patched DSP code.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Mon, 19 Oct 2015 17:13:56 +0000
parents f42854da4563
children
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173
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1 /*
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2 * This module takes care of opening the serial port and setting the
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3 * proper "raw" termios modes, including the baud rate.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <sys/file.h>
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8 #include <sys/ioctl.h>
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9 #include <termios.h>
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include <string.h>
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13 #include <strings.h>
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14 #include <unistd.h>
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15
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16 int target_fd;
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17 char *baudrate_name = "115200";
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18
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19 static struct baudrate {
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20 char *name;
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21 speed_t termios_code;
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22 } baud_rate_table[] = {
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23 {"19200", B19200},
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24 {"38400", B38400},
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25 {"57600", B57600},
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26 {"115200", B115200},
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27 /* non-standard high baud rates "remapped" by CP2102 usb2serial IC */
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28 {"203125", B230400},
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29 {"406250", B460800},
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30 {"812500", B921600},
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31 /* table search terminator */
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32 {NULL, B0}
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33 };
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34
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35 static speed_t
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36 get_baud_rate()
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37 {
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38 struct baudrate *br;
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39
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40 for (br = baud_rate_table; br->name; br++)
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41 if (!strcmp(br->name, baudrate_name))
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42 break;
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43 if (!br->name) {
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44 fprintf(stderr, "baud rate \"%s\" unknown/unsupported\n",
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45 baudrate_name);
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46 exit(1);
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47 }
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48 return br->termios_code;
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49 }
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50
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51 open_target_serial(ttydev)
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52 char *ttydev;
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53 {
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54 struct termios target_termios;
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55 speed_t br_code;
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56
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57 br_code = get_baud_rate();
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58 target_fd = open(ttydev, O_RDWR|O_NONBLOCK);
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59 if (target_fd < 0) {
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60 perror(ttydev);
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61 exit(1);
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62 }
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63 target_termios.c_iflag = IGNBRK;
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64 target_termios.c_oflag = 0;
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65 target_termios.c_cflag = CLOCAL|HUPCL|CREAD|CS8;
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66 target_termios.c_lflag = 0;
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67 target_termios.c_cc[VMIN] = 1;
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68 target_termios.c_cc[VTIME] = 0;
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69 cfsetispeed(&target_termios, br_code);
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70 cfsetospeed(&target_termios, br_code);
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71 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) {
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72 perror("initial tcsetattr on target");
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73 exit(1);
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74 }
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75 return 0;
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76 }
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77
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78 set_serial_nonblock(state)
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79 int state;
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80 {
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81 ioctl(target_fd, FIONBIO, &state);
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82 }