1 /*
2 * Copyright (C) 2004-2010 NXP Software
3 * Copyright (C) 2010 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 /****************************************************************************************/
19 /* INCLUDE FILES */
20 /****************************************************************************************/
21
22 #include "LVM_Timer.h"
23 #include "LVM_Timer_Private.h"
24 #include "LVM_Macros.h"
25
26 /****************************************************************************************/
27 /* DEFINITIONS */
28 /****************************************************************************************/
29
30 #define OneOverThousandInQ24 16777
31
32 /****************************************************************************************/
33 /* INIT FUNCTION */
34 /****************************************************************************************/
35
LVM_Timer_Init(LVM_Timer_Instance_t * pInstance,LVM_Timer_Params_t * pParams)36 void LVM_Timer_Init(LVM_Timer_Instance_t* pInstance, LVM_Timer_Params_t* pParams) {
37 LVM_Timer_Instance_Private_t* pInstancePr;
38 pInstancePr = (LVM_Timer_Instance_Private_t*)pInstance;
39
40 pInstancePr->CallBackParam = pParams->CallBackParam;
41 pInstancePr->pCallBackParams = (LVM_INT32*)pParams->pCallBackParams;
42 pInstancePr->pCallbackInstance = pParams->pCallbackInstance;
43 pInstancePr->pCallBack = pParams->pCallBack;
44 pInstancePr->TimerArmed = 1;
45
46 MUL32x16INTO32(pParams->SamplingRate, OneOverThousandInQ24, pInstancePr->RemainingTimeInSamples,
47 16); /* (Q0 * Q24) >>16 into Q8*/
48 MUL32x16INTO32(pInstancePr->RemainingTimeInSamples, pParams->TimeInMs,
49 pInstancePr->RemainingTimeInSamples, 8); /* (Q8 * Q0) >>8 into Q0*/
50 }
51
52 /****************************************************************************************/
53 /* END OF FILE */
54 /****************************************************************************************/
55