1 /*
2 ** ###################################################################
3 **     Processors:          MIMX8MN6CUCIZ
4 **                          MIMX8MN6CVTIZ
5 **                          MIMX8MN6DUCJZ
6 **                          MIMX8MN6DVTJZ
7 **
8 **     Compilers:           GNU C Compiler
9 **                          IAR ANSI C/C++ Compiler for ARM
10 **                          Keil ARM C/C++ Compiler
11 **
12 **     Reference manual:    MX8MNRM, Rev.B, 07/2019
13 **     Version:             rev. 2.0, 2019-09-23
14 **     Build:               b211020
15 **
16 **     Abstract:
17 **         Provides a system configuration function and a global variable that
18 **         contains the system frequency. It configures the device and initializes
19 **         the oscillator (PLL) that is part of the microcontroller device.
20 **
21 **     Copyright 2016 Freescale Semiconductor, Inc.
22 **     Copyright 2016-2021 NXP
23 **     All rights reserved.
24 **
25 **     SPDX-License-Identifier: BSD-3-Clause
26 **
27 **     http:                 www.nxp.com
28 **     mail:                 support@nxp.com
29 **
30 **     Revisions:
31 **     - rev. 1.0 (2019-04-22)
32 **         Initial version.
33 **     - rev. 2.0 (2019-09-23)
34 **         Rev.B Header RFP
35 **
36 ** ###################################################################
37 */
38 
39 /*!
40  * @file MIMX8MN6_ca53
41  * @version 2.0
42  * @date 2019-09-23
43  * @brief Device specific configuration file for MIMX8MN6_ca53 (header file)
44  *
45  * Provides a system configuration function and a global variable that contains
46  * the system frequency. It configures the device and initializes the oscillator
47  * (PLL) that is part of the microcontroller device.
48  */
49 
50 #ifndef _SYSTEM_MIMX8MN6_ca53_H_
51 #define _SYSTEM_MIMX8MN6_ca53_H_                 /**< Symbol preventing repeated inclusion */
52 
53 #ifdef __cplusplus
54 extern "C" {
55 #endif
56 
57 #include <stdint.h>
58 
59 /* Define clock source values */
60 #define DEFAULT_SYSTEM_CLOCK   8000000U /* Default System clock value */
61 
62 /**
63  * @brief System clock frequency (core clock)
64  *
65  * The system clock frequency supplied to the SysTick timer and the processor
66  * core clock. This variable can be used by the user application to setup the
67  * SysTick timer or configure other parameters. It may also be used by debugger to
68  * query the frequency of the debug timer or configure the trace clock speed
69  * SystemCoreClock is initialized with a correct predefined value.
70  */
71 extern uint32_t SystemCoreClock;
72 
73 /**
74  * @brief Setup the microcontroller system.
75  *
76  * Typically this function configures the oscillator (PLL) that is part of the
77  * microcontroller device. For systems with variable clock speed it also updates
78  * the variable SystemCoreClock. SystemInit is called from startup_device file.
79  */
80 void SystemInit (void);
81 
82 /**
83  * @brief Updates the SystemCoreClock variable.
84  *
85  * It must be called whenever the core clock is changed during program
86  * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates
87  * the current core clock.
88  */
89 void SystemCoreClockUpdate (void);
90 
91 /**
92  * @brief SystemInit function hook.
93  *
94  * This weak function allows to call specific initialization code during the
95  * SystemInit() execution.This can be used when an application specific code needs
96  * to be called as close to the reset entry as possible (for example the Multicore
97  * Manager MCMGR_EarlyInit() function call).
98  * NOTE: No global r/w variables can be used in this hook function because the
99  * initialization of these variables happens after this function.
100  */
101 void SystemInitHook (void);
102 
103 #ifdef __cplusplus
104 }
105 #endif
106 
107 #endif  /* _SYSTEM_MIMX8MN6_ca53_H_ */
108