// タイムアウト型にしないとデータがうまくひろえない場合がある
private int recv(byte[] buf, int length) {
int retval = 0;
int totalRetval = 0;
long endTime;
long startTime = System.currentTimeMillis();
byte[] tmpbuf = new byte[length];
while (true) {
retval = mComm.read(tmpbuf, length);
// retval = mSerial.read(tmpbuf);
if (retval > 0) {
System.arraycopy(tmpbuf, 0, buf, totalRetval, retval);
totalRetval += retval;
startTime = System.currentTimeMillis();
if (DEBUG_SHOW_RECV) {
Log.d(TAG, "recv(" + retval + ") : " + toHexStr(buf, totalRetval));
}
}
if (totalRetval >= length) {
break;
}
endTime = System.currentTimeMillis();
if ((endTime - startTime) > 250) {
Log.e(TAG, "recv timeout.");
break;
}
}
return retval;
}
// リードバッファをカラにする
private int drain() {
byte[] buf = new byte[1];
int retval = 0;
long endTime;
long startTime = System.currentTimeMillis();
while (true) {
retval = mComm.read(buf, 1);
if (retval > 0) {
// startTime = System.currentTimeMillis();
if (DEBUG_SHOW_DRAIN) {
Log.d(TAG, "drain(" + retval + ") : " + toHexStr(buf[0]));
}
}
endTime = System.currentTimeMillis();
if ((endTime - startTime) > 1000) {
break;
}
}
return retval;
}