Added display print API

display/firmware/main.c

@@ -236,7 +236,7 @@ static void test2() {
 int main() {
 	init();
 	while (1) {
+		test();
 		loop();
-		//test();
 	}
 }

uncanny/server.go

@@ -11,6 +11,8 @@ import (
 const (
 	// highest slot number (range: 0..maxSlot)
 	maxSlot = 4
+	// highest display line number (range: 0..maxLine)
+	maxLine = 1
 )
 
 type Server struct {
@@ -106,6 +108,33 @@ func (s *Server) registerHandlers() {
 			http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
 		}
 	})
+	s.HandleFunc("/display/", func(rw http.ResponseWriter, r *http.Request) {
+		if matched, _ := path.Match("/display/[0-9]*", r.URL.Path); matched {
+			line, err := strconv.ParseUint(path.Base(r.URL.Path), 10, 32)
+			if err != nil {
+				log.Printf("Error decoding line number: %v", err)
+				http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
+			} else if line < 0 || line > maxLine {
+				log.Printf("Invalid line number: %d", line)
+				http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
+			} else {
+				query := r.URL.Query()
+				if _, ok := query["text"]; ok {
+					text := query.Get("text")
+					s.can.DisplayPrint(int(line), text)
+					rw.Header().Set("Content-Type", "text/plain")
+					rw.WriteHeader(http.StatusOK)
+					fmt.Fprintf(rw, "Printed on line %d: '%s'", int(line), text)
+				} else {
+					log.Printf("Invalid query, missing text")
+					http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
+				}
+			}
+		} else {
+			log.Printf("Mismatched path: %s", r.URL.Path)
+			http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
+		}
+	})
 }
 
 func (s *Server) Start() error {