1 /***************************************************************************//**
2  * @file
3  * @brief Device initialization for LFRCO.
4  *******************************************************************************
5  * # License
6  * <b>Copyright 2019 Silicon Laboratories Inc. www.silabs.com</b>
7  *******************************************************************************
8  *
9  * SPDX-License-Identifier: Zlib
10  *
11  * The licensor of this software is Silicon Laboratories Inc.
12  *
13  * This software is provided 'as-is', without any express or implied
14  * warranty. In no event will the authors be held liable for any damages
15  * arising from the use of this software.
16  *
17  * Permission is granted to anyone to use this software for any purpose,
18  * including commercial applications, and to alter it and redistribute it
19  * freely, subject to the following restrictions:
20  *
21  * 1. The origin of this software must not be misrepresented; you must not
22  *    claim that you wrote the original software. If you use this software
23  *    in a product, an acknowledgment in the product documentation would be
24  *    appreciated but is not required.
25  * 2. Altered source versions must be plainly marked as such, and must not be
26  *    misrepresented as being the original software.
27  * 3. This notice may not be removed or altered from any source distribution.
28  *
29  ******************************************************************************/
30 #include "sl_device_init_lfrco.h"
31 #include "em_cmu.h"
32 
33 #if defined(_SILICON_LABS_32B_SERIES_1)
34 #include "sl_device_init_lfrco_config.h"
35 #elif defined(_SILICON_LABS_32B_SERIES_2) && defined(PLFRCO_PRESENT)
36 #include "sl_device_init_lfrco_config.h"
37 #endif
38 
sl_device_init_lfrco(void)39 sl_status_t sl_device_init_lfrco(void)
40 {
41 #if defined(_SILICON_LABS_32B_SERIES_2) && defined(PLFRCO_PRESENT)
42   CMU_LFRCOSetPrecision(SL_DEVICE_INIT_LFRCO_PRECISION);
43 #endif
44 
45 #if defined(_SILICON_LABS_32B_SERIES_1)
46 #if SL_DEVICE_INIT_LFRCO_ENVREF == 0
47   CMU->LFRCOCTRL &= ~(CMU_LFRCOCTRL_ENVREF);
48 #else
49   CMU->LFRCOCTRL |= CMU_LFRCOCTRL_ENVREF;
50 #endif
51 
52 #if SL_DEVICE_INIT_LFRCO_ENCHOP == 0
53   CMU->LFRCOCTRL &= ~(CMU_LFRCOCTRL_ENCHOP);
54 #else
55   CMU->LFRCOCTRL |= CMU_LFRCOCTRL_ENCHOP;
56 #endif
57 
58 #if SL_DEVICE_INIT_LFRCO_ENDEM == 0
59   CMU->LFRCOCTRL &= ~(CMU_LFRCOCTRL_ENDEM);
60 #else
61   CMU->LFRCOCTRL |= CMU_LFRCOCTRL_ENDEM;
62 #endif
63 #endif // defined(_SILICON_LABS_32B_SERIES_1)
64 
65   return SL_STATUS_OK;
66 }
67