lpc_spi.h

给大家提供一个在inram/exram中调试的示例,在周公的lpc2200上调试过.

#ifndef __LPC_SPI_H
#define __LPC_SPI_H

/***********************************************************************
 *         BU MMS China, Philips Semiconductor Software Support
 *         Embest info&Tech Co. Software Support
 *---------------------------------------------------------------------------
 * The software is delivered "AS IS" without warranty or condition of any
 * kind, either express, implied or statutory.  Everybody can use it as 
 * it is opened and without copyright. We will not take any law responsibility
 * for any problem produced by using this software.
 *---------------------------------------------------------------------------
 *    File name:	LPC_SPI.h                                                            
 *    Description:	Define SPI structure and relative micro
 *
 *    History:
 *    1. Date: 		Nov 20, 2004
 *       Author: 	Shawn Zhang
 *       Description: Create
 *
 *	$Revision: 1.0 $
 **********************************************************************/

#include "LPC_Base.h"
#include "LPC_Type.h"

#include "LPC_SysControl.h"

/* The micro are configurable */
#define SPI_RXBUFSIZE    64

/* 	
	SPI max speed: 7.5Mbits/s
 	SPI bus speed = Fpclk / SPCCR 
 */
#define SPI_MAXSPEED        7500000

#define SPCCR_MINVALUE		8	

/* SPI Status Type */
#define SPSR_ABRT	0x8		// Slave abort
#define SPSR_MODF	0x10	// Mode fault
#define SPSR_ROVR	0x20	// Read overrun
#define SPSR_WCOL	0x40	// Write collision
#define SPSR_SPIF	0x80	// SPI transfer complete flag

#define SPI_BUF_OVERFLOW_ERR       0x4

/* Device number */
typedef enum {
  SPI0 = 0,
  SPI1
} LPC_SPI_Channel_t;

/* Clock phase control */
typedef enum {
	SCK_FIRSTEDGE = 0,
	SCK_SECONDEDGE
} LPC_SPI_CPHA_t;

/* Clock polarity control */
typedef enum {
	SCK_HIGH = 0,
	SCK_LOW
} LPC_SPI_CPOL_t;

/*  LSB First controls */
typedef enum {
	MSB = 0,		// bit 1 first
	LSB			// bit 0 first
} LPC_SPI_LSBF_t;

/* Master mode select */
typedef enum {
	SPI_SLAVE = 0,
	SPI_MASTER
} LPC_SPI_Mode_t;

typedef struct {
	char RxBuf[SPI_RXBUFSIZE];
	char* pTxBuf;
	
	int RxHeadPoint;
	int RxTailPoint;

	volatile int RxCount;
	volatile int TxCount;

	volatile int status;
}LPC_SPI_Buffer_t;

typedef struct {
	LPC_SPI_Mode_t Mode;
	lpc_uint32 BusSpeed;

	LPC_SPI_CPHA_t  CPHA;
	LPC_SPI_CPOL_t   CPOL;
	LPC_SPI_LSBF_t  LSBF;
	
	bool IntEnable;
	void (* Fnpr)(void *);
	void * FnprArg;

	LPC_SPI_Buffer_t SPIBuffer;
} LPC_SPI_Config_t;

/* Declare functions */
int SPI_Init (LPC_SPI_Channel_t DevNum, LPC_SPI_Mode_t Mode, lpc_uint32 BusSpeed,
	LPC_SPI_CPHA_t  CPHA, LPC_SPI_CPOL_t  CPOL, LPC_SPI_LSBF_t  LSBF,
	bool IntEnable, void (* Fnpr)(void *), void * FnprArg);

int SPI_Write(LPC_SPI_Channel_t DevNum, char* Buf, int Size);
char SPI_Read (LPC_SPI_Channel_t DevNum);

char SPI_GetStatus(LPC_SPI_Channel_t DevNum);

void SPI0_ISR (void);
void SPI1_ISR (void);

extern SPI0_VectISR (void);
extern SPI1_VectISR (void);

 #endif  // __LPC_SPI_H