1 /* 2 ** ################################################################### 3 ** Processors: LPC804M101JDH20 4 ** LPC804M101JDH24 5 ** LPC804M101JHI33 6 ** LPC804M111JDH24 7 ** LPC804UK 8 ** 9 ** Compilers: GNU C Compiler 10 ** IAR ANSI C/C++ Compiler for ARM 11 ** Keil ARM C/C++ Compiler 12 ** MCUXpresso Compiler 13 ** 14 ** Reference manual: LPC804 User manual Rev.1.0 24 Jan 2018 15 ** Version: rev. 1.0, 2018-01-09 16 ** Build: b200513 17 ** 18 ** Abstract: 19 ** Provides a system configuration function and a global variable that 20 ** contains the system frequency. It configures the device and initializes 21 ** the oscillator (PLL) that is part of the microcontroller device. 22 ** 23 ** Copyright 2016 Freescale Semiconductor, Inc. 24 ** Copyright 2016-2020 NXP 25 ** All rights reserved. 26 ** 27 ** SPDX-License-Identifier: BSD-3-Clause 28 ** 29 ** http: www.nxp.com 30 ** mail: support@nxp.com 31 ** 32 ** Revisions: 33 ** - rev. 1.0 (2018-01-09) 34 ** Initial version. 35 ** 36 ** ################################################################### 37 */ 38 39 /*! 40 * @file LPC804 41 * @version 1.0 42 * @date 2018-01-09 43 * @brief Device specific configuration file for LPC804 (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_LPC804_H_ 51 #define _SYSTEM_LPC804_H_ /**< Symbol preventing repeated inclusion */ 52 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 #include <stdint.h> 58 59 #define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */ 60 #define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */ 61 #define CLK_FRO_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 62 #define CLK_OSC_IN 12000000u /* Oscillator input */ 63 #define CLK_OSC_LP 1000000u /* Low power oscillator */ 64 65 volatile extern uint32_t g_Fro_Osc_Freq; 66 67 /** 68 * @brief System clock frequency (core clock) 69 * 70 * The system clock frequency supplied to the SysTick timer and the processor 71 * core clock. This variable can be used by the user application to setup the 72 * SysTick timer or configure other parameters. It may also be used by debugger to 73 * query the frequency of the debug timer or configure the trace clock speed 74 * SystemCoreClock is initialized with a correct predefined value. 75 */ 76 extern uint32_t SystemCoreClock; 77 78 /** 79 * @brief Setup the microcontroller system. 80 * 81 * Typically this function configures the oscillator (PLL) that is part of the 82 * microcontroller device. For systems with variable clock speed it also updates 83 * the variable SystemCoreClock. SystemInit is called from startup_device file. 84 */ 85 void SystemInit (void); 86 87 /** 88 * @brief Updates the SystemCoreClock variable. 89 * 90 * It must be called whenever the core clock is changed during program 91 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 92 * the current core clock. 93 */ 94 void SystemCoreClockUpdate (void); 95 96 /** 97 * @brief SystemInit function hook. 98 * 99 * This weak function allows to call specific initialization code during the 100 * SystemInit() execution.This can be used when an application specific code needs 101 * to be called as close to the reset entry as possible (for example the Multicore 102 * Manager MCMGR_EarlyInit() function call). 103 * NOTE: No global r/w variables can be used in this hook function because the 104 * initialization of these variables happens after this function. 105 */ 106 void SystemInitHook (void); 107 108 #ifdef __cplusplus 109 } 110 #endif 111 112 #endif /* _SYSTEM_LPC804_H_ */ 113
