Merge pull request #498 from arduino/revert-486-devel

Revert "Port fix: Reinitialize serial buffer on every read to avoid concurrent rewrite"

Author: Roberto Sora

serialport.go

@@ -95,13 +95,12 @@ type SpPortMessageRaw struct {
 func (p *serport) reader() {
 
 	//var buf bytes.Buffer
+	ch := make([]byte, 1024)
 	timeCheckOpen := time.Now()
 	var buffered_ch bytes.Buffer
 
 	for {
 
-		ch := make([]byte, 1024)
-
 		n, err := p.portIo.Read(ch)
 
 		//if we detect that port is closing, break out o this for{} loop.
@@ -128,9 +127,12 @@ func (p *serport) reader() {
 			for i, w := 0, 0; i < n; i += w {
 				runeValue, width := utf8.DecodeRune(ch[i:n])
 				if runeValue == utf8.RuneError {
-					buffered_ch.Write(ch[i:n])
+					buffered_ch.Write(append(ch[i:n]))
 					break
 				}
+				if i == n {
+					buffered_ch.Reset()
+				}
 				data += string(runeValue)
 				w = width
 			}