/* | |
** Copyright 2003-2010, VisualOn, Inc. | |
** | |
** Licensed under the Apache License, Version 2.0 (the "License"); | |
** you may not use this file except in compliance with the License. | |
** You may obtain a copy of the License at | |
** | |
** http://www.apache.org/licenses/LICENSE-2.0 | |
** | |
** Unless required by applicable law or agreed to in writing, software | |
** distributed under the License is distributed on an "AS IS" BASIS, | |
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
** See the License for the specific language governing permissions and | |
** limitations under the License. | |
*/ | |
/*********************************************************************** | |
* File: homing.c * | |
* * | |
* Description:Performs the homing routines * | |
* * | |
************************************************************************/ | |
#include "typedef.h" | |
#include "cnst.h" | |
#include "basic_op.h" | |
#include "bits.h" | |
#include "homing.tab" | |
Word16 encoder_homing_frame_test(Word16 input_frame[]) | |
{ | |
Word32 i; | |
Word16 j = 0; | |
/* check 320 input samples for matching EHF_MASK: defined in e_homing.h */ | |
for (i = 0; i < L_FRAME16k; i++) | |
{ | |
j = (Word16) (input_frame[i] ^ EHF_MASK); | |
if (j) | |
break; | |
} | |
return (Word16) (!j); | |
} | |