lpc177x_8x_clk.c File Reference

#include <stdint.h>
#include <cfg/arch.h>
#include <arch/cm3.h>
#include <arch/cm3/timer.h>
#include <arch/cm3/nxp/lpc177x_8x_clk.h>
#include <cfg/clock.h>
#include <arch/cm3/nxp/lpc177x_8x.h>

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Defines
#define	CLOCK_SETUP   1
#define	SCS_Val   0x00000021
#define	CLKSRCSEL_Val   0x00000001
#define	PLL0_SETUP   1
#define	PLL0CFG_Val   0x00000009
#define	PLL1_SETUP   1
#define	PLL1CFG_Val   0x00000023
#define	CCLKSEL_Val   (0x00000001|(1<<8))
#define	USBCLK_SETUP   1
#define	USBCLKSEL_Val   (0x00000001|(0x02<<8))
#define	EMCCLKSEL_Val   0x00000001
#define	PCLKSEL_Val   0x00000002
#define	PCONP_Val   0x042887DE
#define	CLKOUTCFG_Val   0x00000100
#define	FLASH_SETUP   1
#define	FLASHCFG_Val   0x00005000
#define	CHECK_RANGE(val, min, max)   ((val < min) || (val > max))
#define	CHECK_RSVD(val, mask)   (val & mask)
#define	__M   ((PLL0CFG_Val & 0x1F) + 1)
#define	__PLL0_CLK(__F_IN)   (__F_IN * __M)
#define	__CCLK_DIV   (CCLKSEL_Val & 0x1F)
#define	__PCLK_DIV   (PCLKSEL_Val & 0x1F)
#define	__ECLK_DIV   ((EMCCLKSEL_Val & 0x01) + 1)
#define	__CORE_CLK   (__PLL0_CLK(OSC_CLK) / __CCLK_DIV)
#define	__PER_CLK   (__PLL0_CLK(OSC_CLK) / __PCLK_DIV)
#define	__EMC_CLK   (__PLL0_CLK(OSC_CLK) / __ECLK_DIV)
Functions
void	SystemCoreClockUpdate (void)
int	SetSysClock (void)
	Sets System clock frequency to the configured defaults.
uint32_t	SysCtlClockGet (void)
	requests System clock frequency
uint32_t	Lpc17xx_ClockGet (int idx)
	requests frequency of the given clock
Variables
uint32_t	SystemCoreClock = __CORE_CLK
uint32_t	PeripheralClock = __PER_CLK
uint32_t	EMCClock = __EMC_CLK
uint32_t	USBClock = (48000000UL)

---

Define Documentation

#define CLOCK_SETUP   1

#define SCS_Val   0x00000021

Referenced by SetSysClock().

#define CLKSRCSEL_Val   0x00000001

Referenced by SetSysClock().

#define PLL0_SETUP   1

#define PLL0CFG_Val   0x00000009

Referenced by SetSysClock().

#define PLL1_SETUP   1

#define PLL1CFG_Val   0x00000023

Referenced by SetSysClock().

#define CCLKSEL_Val   (0x00000001|(1<<8))

Referenced by SetSysClock().

#define USBCLK_SETUP   1

#define USBCLKSEL_Val   (0x00000001|(0x02<<8))

Referenced by SetSysClock().

#define EMCCLKSEL_Val   0x00000001

Referenced by SetSysClock().

#define PCLKSEL_Val   0x00000002

Referenced by SetSysClock().

#define PCONP_Val   0x042887DE

Referenced by SetSysClock().

#define CLKOUTCFG_Val   0x00000100

Referenced by SetSysClock().

#define FLASH_SETUP   1

#define FLASHCFG_Val   0x00005000

Referenced by SetSysClock().

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

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

#define __M   ((PLL0CFG_Val & 0x1F) + 1)

#define __PLL0_CLK

(

__F_IN

)

(__F_IN * __M)

#define __CCLK_DIV   (CCLKSEL_Val & 0x1F)

#define __PCLK_DIV   (PCLKSEL_Val & 0x1F)

#define __ECLK_DIV   ((EMCCLKSEL_Val & 0x01) + 1)

#define __CORE_CLK   (__PLL0_CLK(OSC_CLK) / __CCLK_DIV)

#define __PER_CLK   (__PLL0_CLK(OSC_CLK) / __PCLK_DIV)

#define __EMC_CLK   (__PLL0_CLK(OSC_CLK) / __ECLK_DIV)

---

Function Documentation

int SetSysClock

(

void

)

Sets System clock frequency to the configured defaults.

Update SystemCoreClock according to Clock Register Values.

Note:

This function should be used only after reset.

Parameters:

None

Return values:

None

References CCLKSEL_Val, CLKOUTCFG_Val, CLKSRCSEL_Val, EMCCLKSEL_Val, FLASHCFG_Val, LPC_SC, PCLKSEL_Val, PCONP_Val, PLL0CFG_Val, PLL1CFG_Val, rc, SCS_Val, SystemCoreClockUpdate(), and USBCLKSEL_Val.

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uint32_t SysCtlClockGet

(

void

)

requests System clock frequency

Note:

This function should be used only after reset.

Parameters:

None

Return values:

None

References SystemCoreClock, and SystemCoreClockUpdate().

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uint32_t Lpc17xx_ClockGet

(

int

idx

)

requests frequency of the given clock

Parameters:

idx	NUT_HWCLK Index

Return values:

clock

or 0 if idx points to an invalid clock

References EMCClock, NUT_HWCLK_CPU, PeripheralClock, SystemCoreClock, SystemCoreClockUpdate(), and USBClock.

Referenced by Lpc177x_8x_MciSet_MCIClock(), and NutArchClockGet().

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---

Variable Documentation

uint32_t PeripheralClock = __PER_CLK

Peripheral Clock Frequency (Pclk)

Referenced by Lpc17xx_ClockGet(), and SystemCoreClockUpdate().

uint32_t EMCClock = __EMC_CLK

EMC Clock Frequency

Referenced by Lpc17xx_ClockGet(), and SystemCoreClockUpdate().

uint32_t USBClock = (48000000UL)

USB Clock Frequency - this value will be updated after call SystemCoreClockUpdate, should be 48MHz