lpc177x_8x_systick.h

优龙LPC1788开发板资料

/***********************************************************************//**
 * @file		lpc177x_8x_systick.h
 * @brief		Contains all macro definitions and function prototypes
 * 				support for SYSTICK firmware library on LPC178X
 * @version		1.0
 * @date		18. September. 2010
 * @author		NXP MCU SW Application Team
 **************************************************************************
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * products. This software is supplied "AS IS" without any warranties.
 * NXP Semiconductors assumes no responsibility or liability for the
 * use of the software, conveys no license or title under any patent,
 * copyright, or mask work right to the product. NXP Semiconductors
 * reserves the right to make changes in the software without
 * notification. NXP Semiconductors also make no representation or
 * warranty that such application will be suitable for the specified
 * use without further testing or modification.
 **************************************************************************/

/* Peripheral group ----------------------------------------------------------- */
#ifndef LPC178X_SYSTICK_H_
#define LPC178X_SYSTICK_H_

/* Includes ------------------------------------------------------------------- */
#include "LPC177x_8x.h"
#include "lpc_types.h"


#ifdef __cplusplus
extern "C"
{
#endif


/* Private Macros ------------------------------------------------------------- */
/** @defgroup SYSTICK_Private_Macros SYSTICK Private Macros
 * @{
 */
/*********************************************************************//**
 * Macro defines for System Timer Control and status (STCTRL) register
 **********************************************************************/
#define ST_CTRL_ENABLE		((uint32_t)(1<<0))
#define ST_CTRL_TICKINT		((uint32_t)(1<<1))
#define ST_CTRL_CLKSOURCE	((uint32_t)(1<<2))
#define ST_CTRL_COUNTFLAG	((uint32_t)(1<<16))

/*********************************************************************//**
 * Macro defines for System Timer Reload value (STRELOAD) register
 **********************************************************************/
#define ST_RELOAD_RELOAD(n)		((uint32_t)(n & 0x00FFFFFF))

/*********************************************************************//**
 * Macro defines for System Timer Current value (STCURRENT) register
 **********************************************************************/
#define ST_RELOAD_CURRENT(n)	((uint32_t)(n & 0x00FFFFFF))

/*********************************************************************//**
 * Macro defines for System Timer Calibration value (STCALIB) register
 **********************************************************************/
#define ST_CALIB_TENMS(n)		((uint32_t)(n & 0x00FFFFFF))
#define ST_CALIB_SKEW			((uint32_t)(1<<30))
#define ST_CALIB_NOREF			((uint32_t)(1<<31))

#define CLKSOURCE_EXT			((uint32_t)(0))
#define CLKSOURCE_CPU			((uint32_t)(1))

/**
 * @}
 */


/* Public Functions ----------------------------------------------------------- */
/** @defgroup SYSTICK_Public_Functions SYSTICK Public Functions
 * @{
 */

void SYSTICK_InternalInit(uint32_t time);
void SYSTICK_ExternalInit(uint32_t freq, uint32_t time);

void SYSTICK_Cmd(FunctionalState NewState);
void SYSTICK_IntCmd(FunctionalState NewState);
uint32_t SYSTICK_GetCurrentValue(void);
void SYSTICK_ClearCounterFlag(void);

/**
 * @}
 */


#ifdef __cplusplus
}
#endif


#endif /* LPC178X_SYSTICK_H_ */

/**
 * @}
 */

/* --------------------------------- End Of File ------------------------------ */