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/*************************************************************

 * I2C functions for Herveille i2c master_slave core         *

 *                                                           *

 * Provides functions to read from and write to the I2C bus. *

 * Master and slave mode are both supported                  *

 *                                                           *

 *                                                           *

 ************************************************************/

#ifndef _I2C_MASTER_SLAVE_H_

#define _I2C_MASTER_SLAVE_H_

extern const int i2c_base_adr[4];

//Memory mapping adresses

#define PRERlo 0x0  // Clock prescaler register 

#define PRERhi 0x1  // Clock prescaler register 

#define CTR    0x2     // Control register

#define TXR    0x3     // Transmit register

#define RXR    0x3     // Recive register

#define CR     0x4      // Controll register

#define SR     0x4      // Status register

#define SLADR  0x7      // Slave address register

#define CTR_CORE_ENABLE 0x80

#define CTR_INTR_ENABLE 0x40

#define CTR_SLAVE_ENABLE 0x20

#define CR_START        0x80

#define CR_STOP         0x40

#define CR_READ         0x20

#define CR_WRITE        0x10

#define CR_ACK          0x08

#define CR_SL_CONT      0x02

#define CR_IACK         0x01

#define SR_RXACK            0x80

#define SR_BUSY             0x40

#define SR_ARB_LOST         0x20

#define SR_SLAVE_MODE       0x10

#define SR_SLAVE_DATA_AVAIL 0x08

#define SR_SLAVE_DATA_REQ   0x04

#define SR_TRANSFER_IN_PRG  0x02

#define SR_IRQ_FLAG         0x01

int i2c_master_slave_initI2C(int core, unsigned short prescaler,

                             int interrupt_enable);

int i2c_master_slave_initI2CSlave (int core, char addr);

int i2c_master_slave_deactI2CSlave (int core);

int i2c_master_slave_masterStart(int core, unsigned char addr, int read);

int i2c_master_slave_masterWrite(int core, unsigned char data,

                                 int check_prev_ack, int stop);

int i2c_master_slave_masterStop(int core);

int i2c_master_slave_masterRead(int core, int check_prev_ack, int stop,

                                char* data);

int i2c_master_slave_ackInterrupt(int core);

#endif