i2c.h.svn-base

Spearhead2000 的 USB驱动程序

/*****************************************************************************/
/* This confidential and proprietary software may be used only as authorized */
/* by a licensing agreement from STMicroelectronics.                         */
/* In the event of publication, the following notice is applicable:          */
/*                                                                           */
/*                   (C) COPYRIGHT 2002 STMicroelectronics                   */
/*                Innovative Systems Design Group - Central R&D              */
/*                            ALL RIGHTS RESERVED                            */
/*                                                                           */
/* The entire notice above must be reproduced on all authorized copies.      */
/*                                                                           */
/* -- File:                  i2c.h                                           */
/* -- Author:                Nicola Imperato                                 */
/* -- Description:           Header I2C                                      */
/*                                                                           */
/* -- Modification History: - 1.0 (8/4/2005)                                 */
/*****************************************************************************/

#ifndef __I2C_H
#define __I2C_H


extern void i2cInterrupt(unsigned int vector);
extern void i2cInit(void);
extern void i2cTest(void);
void i2c_rx (char *buff_addr, char mem_addr, char nb , char slave_addr);
#define APB_I2C_BASE   0x12007000

typedef struct I2CController
{
  unsigned int CR;
  unsigned int SR1;
  unsigned int SR2;
  unsigned int CCR;
  unsigned int OAR1;
  unsigned int OAR2;
  unsigned int DR;   
  
} I2CController;

#define I2CCntl ((volatile struct I2CController*) (APB_I2C_BASE))

// Control Register bits
#define  CR_PE	     0x0020 // Peripherial enable 
#define  CR_ENGC     0x0010 // Enable general call       // kept reserved as in the recent I2C doc
#define  CR_START    0x0008 // Start generation
#define  CR_ACK	     0x0004 // Acknowledge enable
#define  CR_STOP     0x0002 // Stop generation
#define  CR_ITE	     0x0001 // Interrupt enable

// Status Register 1 bits
#define  SR1_EVF     0x0080 // Event flag
#define  SR1_TRA     0x0020 // Transmitter/Receiver 
#define  SR1_BUSY    0x0010 // Bus Busy 
#define  SR1_BTF     0x0008 // Byte transfer finished
#define  SR1_ADSL    0x0004 // Address matched (only in slave mode)
#define  SR1_MSL     0x0002 // Master/Slave
#define  SR1_SB      0x0001 // Start bit (only in master mode)



#endif //__I2C_H