70 lines
2.8 KiB
C
70 lines
2.8 KiB
C
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/****************************************************************************
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* $Id:: clkconfig.c 6874 2011-03-22 01:58:31Z usb00423 $
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* Project: NXP LPC13Uxx Clock Configuration example
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*
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* Description:
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* This file contains clock configuration code example which include
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* watchdog setup and debug clock out setup.
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*
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****************************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
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* copyright, or mask work right to the product. NXP Semiconductors
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* reserves the right to make changes in the software without
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* notification. NXP Semiconductors also make no representation or
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* warranty that such application will be suitable for the specified
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* use without further testing or modification.
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors'
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* relevant copyright in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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****************************************************************************/
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#include "LPC13Uxx.h"
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#include "clkconfig.h"
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/*****************************************************************************
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** Function name: WDT_CLK_Setup
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**
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** Descriptions: Configure WDT clock.
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** parameters: clock source: irc_osc(0), main_clk(1), wdt_osc(2).
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**
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** Returned value: None
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**
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*****************************************************************************/
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void WDT_CLK_Setup ( uint32_t clksrc )
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{
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/* Freq = 0.5Mhz, div_sel is 0x1F, divided by 64. WDT_OSC should be 7.8125khz */
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LPC_SYSCON->WDTOSCCTRL = (0x1<<5)|0x1F;
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LPC_SYSCON->PDRUNCFG &= ~(0x1<<6); /* Let WDT clock run */
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/* Enables clock for WDT */
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LPC_SYSCON->SYSAHBCLKCTRL |= (1<<15);
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LPC_WWDT->CLKSEL = clksrc; /* Select clock source */
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return;
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}
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/*****************************************************************************
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** Function name: CLKOUT_Setup
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**
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** Descriptions: Configure CLKOUT for reference clock check.
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** parameters: clock source: irc_osc(0), sys_osc(1), wdt_osc(2),
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** main_clk(3).
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**
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** Returned value: None
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**
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*****************************************************************************/
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void CLKOUT_Setup ( uint32_t clksrc )
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{
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/* debug PLL after configuration. */
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LPC_SYSCON->CLKOUTSEL = clksrc; /* Select Main clock */
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LPC_SYSCON->CLKOUTDIV = 1; /* Divided by 1 */
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return;
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}
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