hal_spear_i2c_reg.h

来自「Spearhead2000的bootloader」· C头文件 代码 · 共 54 行

//#include <asm-arm/arch-spearhead/hardware.h>
//#include <asm-arm/arch-spearhead/spearhead.h>
#define I2C_BASE_ADD   0x12007000

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

} I2CController;

#define I2CCntl ((volatile struct I2CController*) (I2C_BASE_ADD))

#define I2CCR 	I2CCntl->CR
#define I2CSR1 	I2CCntl->SR1
#define I2CSR2 	I2CCntl->SR2
#define I2CCCR 	I2CCntl->CCR
#define I2CDR 	I2CCntl->DR


/*****************************************************************************/
/***** H A R D W A R E   R E G I S T E R   B I T   D E F I N I T I O N S *****/
/*****************************************************************************/

#define ACK         0x04                             /* I2C acknowledge flag */
#define START       0x08                                       /* Start flag */
#define STOP        0x02                                        /* Stop flag */
#define PE          0x20                           /* Peripheral enable flag */
#define BTF         0x08                        /* Byte transfer status flag */
#define EVF         0x80                                       /* Event flag */
#define AF          0x10                              /* Acknowledge failure */
#define STATUS      0xBB                                     /* Status flags */
#define SB          0x01                           /* Start bit status flags */
#define ITE         0x01                           /* Interrupt enable flags */
#define TRA         0x20                           /* Interrupt enable flags */
#define I2C_ERR     0x10                                      /* Error flags */
/*---------------------------------Define Fcpu-------------------------------*/
#define Fcpu ((unsigned long) 8000000)