1 /*
2 * Copyright (c) 2015, Freescale Semiconductor, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * o Redistributions of source code must retain the above copyright notice, this list
9 * of conditions and the following disclaimer.
10 *
11 * o Redistributions in binary form must reproduce the above copyright notice, this
12 * list of conditions and the following disclaimer in the documentation and/or
13 * other materials provided with the distribution.
14 *
15 * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from this
17 * software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "wdog_imx.h"
32
33 /*******************************************************************************
34 * Code
35 ******************************************************************************/
36
37 /*FUNCTION**********************************************************************
38 *
39 * Function Name : WDOG_Enable
40 * Description : Configure WDOG funtions, call once only
41 *
42 *END**************************************************************************/
WDOG_Enable(WDOG_Type * base,uint8_t timeout)43 void WDOG_Enable(WDOG_Type *base, uint8_t timeout)
44 {
45 uint16_t wcr = base->WCR & (~WDOG_WCR_WT_MASK);
46 base->WCR = wcr | WDOG_WCR_WT(timeout) | WDOG_WCR_WDE_MASK;
47 }
48
49 /*FUNCTION**********************************************************************
50 *
51 * Function Name : WDOG_Reset
52 * Description : Assert WDOG reset signal
53 *
54 *END**************************************************************************/
WDOG_Reset(WDOG_Type * base,bool wda,bool srs)55 void WDOG_Reset(WDOG_Type *base, bool wda, bool srs)
56 {
57 uint16_t wcr = base->WCR;
58
59 if (wda)
60 wcr &= ~WDOG_WCR_WDA_MASK;
61 if (srs)
62 wcr &= ~WDOG_WCR_SRS_MASK;
63
64 base->WCR = wcr;
65 }
66
67 /*FUNCTION**********************************************************************
68 *
69 * Function Name : WDOG_Refresh
70 * Description : Refresh the WDOG to prevent timeout
71 *
72 *END**************************************************************************/
WDOG_Refresh(WDOG_Type * base)73 void WDOG_Refresh(WDOG_Type *base)
74 {
75 base->WSR = 0x5555;
76 base->WSR = 0xAAAA;
77 }
78
79 /*******************************************************************************
80 * EOF
81 ******************************************************************************/
82
