CMSIS Cortex-M3 Device Peripheral Access Layer Source File for the NXP LPC13xx Device Series. [詳解]

#include <stdint.h>
#include "LPC13xx.h"

system_LPC13xx.c の依存先関係図:

マクロ定義
#define	CLOCK_SETUP 1

#define	SYSCLK_SETUP 1

#define	SYSOSC_SETUP 1

#define	SYSOSCCTRL_Val 0x00000000

#define	WDTOSC_SETUP 0

#define	WDTOSCCTRL_Val 0x000000A0

#define	SYSPLLCLKSEL_Val 0x00000001

#define	SYSPLL_SETUP 1

#define	SYSPLLCTRL_Val 0x00000025

#define	MAINCLKSEL_Val 0x00000003

#define	USBCLK_SETUP 1

#define	USBPLL_SETUP 1

#define	USBPLLCLKSEL_Val 0x00000001

#define	USBPLLCTRL_Val 0x00000003

#define	SYSAHBCLKDIV_Val 0x00000001

#define	AHBCLKCTRL_Val 0x0001005F

#define	MEMMAP_SETUP 0

#define	SYSMEMREMAP_Val 0x00000001

#define	CHECK_RANGE(val, min, max) ((val < min) \|\| (val > max))

#define	CHECK_RSVD(val, mask) (val & mask)

#define	__XTAL (12000000UL) /* Oscillator frequency */

#define	__SYS_OSC_CLK ( __XTAL) /* Main oscillator frequency */

#define	__IRC_OSC_CLK (12000000UL) /* Internal RC oscillator frequency */

#define	__FREQSEL ((WDTOSCCTRL_Val >> 5) & 0x0F)

#define	__DIVSEL (((WDTOSCCTRL_Val & 0x1F) << 1) + 2)

#define	__WDT_OSC_CLK (1600000 / 2)

#define	__SYS_PLLCLKIN (__SYS_OSC_CLK)

#define	__SYS_PLLCLKOUT (__SYS_PLLCLKIN * ((SYSPLLCTRL_Val & 0x01F) + 1))

#define	__MAIN_CLOCK (__SYS_PLLCLKOUT)

#define	__SYSTEM_CLOCK (__MAIN_CLOCK / SYSAHBCLKDIV_Val)

関数
void	SystemCoreClockUpdate (void)
	Updates the SystemCoreClock with current core Clock retrieved from cpu registers. [詳解]

void	SystemInit (void)
	Setup the microcontroller system. Initialize the System. [詳解]

変数
uint32_t	SystemCoreClock = __SYSTEM_CLOCK

詳解

CMSIS Cortex-M3 Device Peripheral Access Layer Source File for the NXP LPC13xx Device Series.

バージョン: V1.02

日付: 18. February 2010

覚え書き: Copyright (C) 2009 ARM Limited. All rights reserved.

: ARM Limited (ARM) is supplying this software for use with Cortex-M processor based microcontrollers. This file can be freely distributed within development tools that are supporting such ARM based processors.

: THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.

マクロ定義詳解

#define __DIVSEL (((WDTOSCCTRL_Val & 0x1F) << 1) + 2)

#define __FREQSEL ((WDTOSCCTRL_Val >> 5) & 0x0F)

#define __IRC_OSC_CLK (12000000UL) /* Internal RC oscillator frequency */

#define __MAIN_CLOCK (__SYS_PLLCLKOUT)

#define __SYS_OSC_CLK ( __XTAL) /* Main oscillator frequency */

#define __SYS_PLLCLKIN (__SYS_OSC_CLK)

#define __SYS_PLLCLKOUT (__SYS_PLLCLKIN * ((SYSPLLCTRL_Val & 0x01F) + 1))

#define __SYSTEM_CLOCK (__MAIN_CLOCK / SYSAHBCLKDIV_Val)

#define __WDT_OSC_CLK (1600000 / 2)

#define __XTAL (12000000UL) /* Oscillator frequency */

#define AHBCLKCTRL_Val 0x0001005F

#define CHECK_RANGE	(	val,
		min,
		max
	)	((val < min) \|\| (val > max))

#define CHECK_RSVD	(	val,
		mask
	)	(val & mask)

#define CLOCK_SETUP 1

#define MAINCLKSEL_Val 0x00000003

#define MEMMAP_SETUP 0

#define SYSAHBCLKDIV_Val 0x00000001

#define SYSCLK_SETUP 1

#define SYSMEMREMAP_Val 0x00000001

#define SYSOSC_SETUP 1

#define SYSOSCCTRL_Val 0x00000000

#define SYSPLL_SETUP 1

#define SYSPLLCLKSEL_Val 0x00000001

#define SYSPLLCTRL_Val 0x00000025

#define USBCLK_SETUP 1

#define USBPLL_SETUP 1

#define USBPLLCLKSEL_Val 0x00000001

#define USBPLLCTRL_Val 0x00000003

#define WDTOSC_SETUP 0

#define WDTOSCCTRL_Val 0x000000A0

関数詳解

void SystemCoreClockUpdate ( void )

Updates the SystemCoreClock with current core Clock retrieved from cpu registers.

Update SystemCoreClock variable

引数

none

戻り値: none

void SystemInit ( void )

Setup the microcontroller system. Initialize the System.

Setup the microcontroller system. Initialize the System and update the SystemCoreClock variable.

Initialize the system

引数

none

戻り値: none

変数詳解

uint32_t SystemCoreClock = __SYSTEM_CLOCK

System Clock Frequency (Core Clock)