lpc177x_8x_nvic.c

来自「优龙LPC1788开发板资料」· C语言 代码 · 共 137 行

/***********************************************************************//**
 * @file		lpc177x_8x_nvic.c
 * @brief		Contains all expansion functions support for
 * 				NVIC firmware library on LPC178X. The main
 * 				NVIC functions are defined in core_cm3.h
 * @version		2.0
 * @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 ----------------------------------------------------------- */
/** @addtogroup NVIC
 * @{
 */

/* Includes ------------------------------------------------------------------- */
#include "lpc177x_8x_nvic.h"


/* Private Macros ------------------------------------------------------------- */
/** @addtogroup NVIC_Private_Macros
 * @{
 */

/* Vector table offset bit mask */
#define NVIC_VTOR_MASK              0x3FFFFF80

/**
 * @}
 */


/* Public Functions ----------------------------------------------------------- */
/** @addtogroup NVIC_Public_Functions
 * @{
 */


/*****************************************************************************//**
 * @brief		De-initializes the NVIC peripheral registers to their default
 * 				reset values.
 * @param		None
 * @return      None
 *
 * These following NVIC peripheral registers will be de-initialized:
 * - Disable Interrupt (32 IRQ interrupt sources that matched with LPC178X)
 * - Clear all Pending Interrupts (32 IRQ interrupt source that matched with LPC178X)
 * - Clear all Interrupt Priorities (32 IRQ interrupt source that matched with LPC178X)
 *******************************************************************************/
void NVIC_DeInit(void)
{
	uint8_t tmp;

	/* Disable all interrupts */
	NVIC->ICER[0] = 0xFFFFFFFF;
	NVIC->ICER[1] = 0x00000001;
	/* Clear all pending interrupts */
	NVIC->ICPR[0] = 0xFFFFFFFF;
	NVIC->ICPR[1] = 0x00000001;

	/* Clear all interrupt priority */
	for (tmp = 0; tmp < 32; tmp++) {
		NVIC->IP[tmp] = 0x00;
	}
}

/*****************************************************************************//**
 * @brief			De-initializes the SCB peripheral registers to their default
 *                  reset values.
 * @param			none
 * @return 			none
 *
 * These following SCB NVIC peripheral registers will be de-initialized:
 * - Interrupt Control State register
 * - Interrupt Vector Table Offset register
 * - Application Interrupt/Reset Control register
 * - System Control register
 * - Configuration Control register
 * - System Handlers Priority Registers
 * - System Handler Control and State Register
 * - Configurable Fault Status Register
 * - Hard Fault Status Register
 * - Debug Fault Status Register
 *******************************************************************************/
void NVIC_SCBDeInit(void)
{
	uint8_t tmp;

	SCB->ICSR = 0x0A000000;
	SCB->VTOR = 0x00000000;
	SCB->AIRCR = 0x05FA0000;
	SCB->SCR = 0x00000000;
	SCB->CCR = 0x00000000;

	for (tmp = 0; tmp < 32; tmp++) {
		SCB->SHP[tmp] = 0x00;
	}

	SCB->SHCSR = 0x00000000;
	SCB->CFSR = 0xFFFFFFFF;
	SCB->HFSR = 0xFFFFFFFF;
	SCB->DFSR = 0xFFFFFFFF;
}


/*****************************************************************************//**
 * @brief		Set Vector Table Offset value
 * @param		offset Offset value
 * @return      None
 *******************************************************************************/
void NVIC_SetVTOR(uint32_t offset)
{
//	SCB->VTOR  = (offset & NVIC_VTOR_MASK);
	SCB->VTOR  = offset;
}

/**
 * @}
 */

/**
 * @}
 */

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