{"id":85,"date":"2026-02-27T17:33:27","date_gmt":"2026-02-27T23:33:27","guid":{"rendered":"http:\/\/aa6kj.hopto.org\/wp\/?p=85"},"modified":"2026-02-28T09:06:35","modified_gmt":"2026-02-28T15:06:35","slug":"bandmaster-v-info-widget","status":"publish","type":"post","link":"http:\/\/aa6kj.hopto.org\/wp\/?p=85","title":{"rendered":"Bandmaster V info widget"},"content":{"rendered":"\n

Wrote the following info widget for Bandmaster V (Linux):<\/p>\n\n\n\n

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <termios.h>
#include <qt6\/libqt6c.h>

\/\/ Define the antenna names
#define ANTENNA1 \"6m beam\"
#define ANTENNA2 \"WARC beam\"
#define ANTENNA3 \"Stack\"
#define ANTENNA4 \"40m beam\"
#define ANTENNA5 \"No antenna\"
#define ANTENNA6 \"No antenna\"
#define ANTENNA7 \"No antenna\"
#define ANTENNA8 \"No antenna\"
#define ANTENNA9 \"No antenna\"
#define ANTENNA10 \"No antenna\"
#define ANTENNA11 \"No antenna\"
#define ANTENNA12 \"No antenna\"

#define DEVICE \"\/dev\/serial\/by-id\/usb-FTDI_FT232R_USB_UART_B003ISA1-if00-port0\"

int fd;
void *widget, *label;

int read_untilcr(int fd, char *buf, int maxlen) {

  int pos = 0, bytes_rd;

  while(1) {
    if((bytes_rd = read(fd, buf + pos, 1)) < 0) return -1;
    if(bytes_rd == 0) {
      sleep(1); \/\/ could be less than 1sec
      continue;
    }
    if(!pos && (*buf == '\\r' || *buf == '\\n')) continue;
    if(pos == maxlen) return -1;
    if(buf[pos] == '\\r') break;
    pos++;
  }
  buf[pos] = '\\0';
  return pos;
}

void set_tty() {

  struct termios param;

  if(tcgetattr(fd, &param) < 0) {
    fprintf(stderr, \"Status get failed.\\n\");
    exit(1);
  }

  param.c_cflag &= ~PARENB;
  param.c_cflag &= ~CSTOPB;
  param.c_cflag |= CS8;
  param.c_cflag &= ~CRTSCTS;
  param.c_cflag |= CREAD | CLOCAL;
  param.c_lflag &= ~ICANON;
  param.c_lflag &= ~ECHO;
  param.c_lflag &= ~ECHOE;
  param.c_lflag &= ~ECHONL;
  param.c_lflag &= ~ISIG;
  param.c_iflag &= ~(IXON | IXOFF | IXANY);
  param.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL);  
  param.c_oflag &= ~OPOST;
  param.c_oflag &= ~ONLCR;
  cfsetispeed(&param, B57600);
  cfsetospeed(&param, B57600);

  if(tcsetattr(fd, TCSANOW, &param) < 0) {
    fprintf(stderr, \"Status set failed.\\n\");
    exit(1);
  }
}

char *txt_noant = \"<b><font color='red'>No antenna.<\/font><\/b>\",
     *txt_40m = \"<b><font color='blue'>40m beam.<\/font><\/b>\",
     *txt_warc = \"<b><font color='blue'>WARC beam.<\/font><\/b>\",
     *txt_stack = \"<b><font color='blue'>Stack.<\/font><\/b>\",
     *txt_6m = \"<b><font color='blue'>6m beam.<\/font><\/b>\";

void update_band_info(void *asd) {

  int len, antenna, relay;
  char buf[512];
  
  if((len = read_untilcr(fd, buf, sizeof(buf))) < 0) {
     fprintf(stderr, \"Read error.\\n\");
     exit(1);
  }
  if(sscanf(buf, \"[TC4RFA29H00M0%1d01EEEEEEEEEEEE%4d]\", &antenna, &relay) != 2) return; \/\/ Some other mesg

  switch(antenna) {
    case 1:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA1, relay);
      q_label_set_text(label, buf);
      break;
    case 2:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA2, relay);
      q_label_set_text(label, buf);
      break;
    case 3:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA3, relay);
      q_label_set_text(label, buf);
      break;
    case 4:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA4, relay);
      q_label_set_text(label, buf);
      break;
    case 5:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA5, relay);
      q_label_set_text(label, buf);
      break;
    case 6:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA6, relay);
      q_label_set_text(label, buf);
      break;
    case 7:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA7, relay);
      q_label_set_text(label, buf);
      break;
    case 8:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA8, relay);
      q_label_set_text(label, buf);
      break;
    case 9:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA9, relay);
      q_label_set_text(label, buf);
      break;
    case 10:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA10, relay);
      q_label_set_text(label, buf);
      break;
    case 11:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA11, relay);
      q_label_set_text(label, buf);
      break;
    case 12:
      sprintf(buf, \"<b><font color='blue'>%s (%d)<\/font><\/b>\", ANTENNA12, relay);
      q_label_set_text(label, buf);
      break;
    default:
      q_label_set_text(label, \"<b><font color='red'>Unknown antennan.<\/font><\/b>\");
  }
}

int main(int argc, char *argv[]) {

  QApplication *app;
  QTimer *timer;  

  if((fd = open(DEVICE, O_RDONLY)) < 0) {
    fprintf(stderr, \"Can't open device.\\n\");
    exit(1);
  }
  set_tty();

  app = q_application_new(&argc, argv);
  widget = q_widget_new2();
  timer = q_timer_new2(widget);
  q_widget_set_window_title(widget, \"Antenna selection\");
  q_widget_resize(widget, 150, 30);
  label = q_label_new5(\"------------------------------\", widget);
  q_label_set_alignment(label, QT_ALIGNMENTFLAG_ALIGNCENTER);
  q_label_set_text_format(label, QT_TEXTFORMAT_RICHTEXT);
  q_timer_start(timer, 100);
  q_timer_on_timeout(timer, update_band_info);
  q_widget_show(widget);
  (void) q_application_exec();
  q_widget_delete(widget);
  q_application_delete(app);

  close(fd);
}
<\/pre>\n\n\n\n
Uses libqt6c (QT bindings for C).<\/p>\n","protected":false},"excerpt":{"rendered":"
Wrote the following info widget for Bandmaster V (Linux): #include <stdio.h>#include <string.h>#include <stdlib.h>#include <fcntl.h>#include <unistd.h>#include <termios.h>#include <qt6\/libqt6c.h>\/\/ Define the antenna names#define ANTENNA1 “6m beam”#define ANTENNA2 “WARC beam”#define ANTENNA3 “Stack”#define ANTENNA4 “40m beam”#define ANTENNA5 “No antenna”#define ANTENNA6 “No antenna”#define ANTENNA7 “No antenna”#define ANTENNA8 “No antenna”#define ANTENNA9 “No antenna”#define ANTENNA10 “No antenna”#define ANTENNA11 “No antenna”#define ANTENNA12 “No […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-85","post","type-post","status-publish","format-standard","hentry","category-ham_radio"],"_links":{"self":[{"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/85","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=85"}],"version-history":[{"count":3,"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/85\/revisions"}],"predecessor-version":[{"id":91,"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=\/wp\/v2\/posts\/85\/revisions\/91"}],"wp:attachment":[{"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=85"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=85"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/aa6kj.hopto.org\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=85"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}