【Z站推荐】AWTK最新动态：使用serial_widget简化串口编程

  "open" text="Open Device" x="10" y="100" w="160" h="36" />  "device" x="180" y="100" w="-200" h="36" text="/dev/ttys032" />  "send" text="Send Message" x="10" y="150" w="160" h="36" />  "send_msg" x="180" y="150" w="-200" h="36" text="hello serial" />  "recv_msg" x="c" y="b:100" w="90%" h="100" />  "serial" />

widget_child_on(win, "serial", EVT_DATA, on_data, win);

static ret_t on_data(void* ctx, event_t* e) {  char text[128] = {0};  widget_t* win = WIDGET(ctx);  serial_widget_t* serial = SERIAL_WIDGET(e->target);  widget_t* label = widget_lookup(win, "recv_msg", TRUE);  int32_t len = tk_istream_read(serial->istream, text, sizeof(text)-1);  if(len > 0) {    text[len] = '\0';    widget_set_text_utf8(label, text);  }  return RET_OK;}

static ret_t on_send(void* ctx, event_t* e) {  char text[128] = {0};  widget_t* win = WIDGET(ctx);  serial_widget_t* serial = SERIAL_WIDGET(widget_lookup(win, "serial", TRUE));  widget_t* edit = widget_lookup(win, "send_msg", TRUE);  widget_get_text_utf8(edit, text, sizeof(text)-1);  tk_ostream_write_len(serial->ostream, text, strlen(text), 3000);  return RET_OK;}

./bin/demo_serial

socat -d -d pty,raw,echo=0 pty,raw,echo=0

2022/07/08 16:32:33 socat[1879] N PTY is /dev/ttys0322022/07/08 16:32:33 socat[1879] N PTY is /dev/ttys0332022/07/08 16:32:33 socat[1879] N starting data transfer loop with FDs [5,5] and [7,7]

cat /dev/ttys033

date >/dev/ttys033