/** @defgroup i2c_defines I2C Defines
@brief Defined Constants and Types for the LPC43xx I2C
@ingroup LPC43xx_defines
@version 1.0.0
@author @htmlonly © @endhtmlonly 2012 Michael Ossmann
@date 10 March 2013
LGPL License Terms @ref lgpl_license
*/
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Michael Ossmann
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see .
*/
#ifndef LPC43XX_I2C_H
#define LPC43XX_I2C_H
/**@{*/
#include
#include
/* --- Convenience macros -------------------------------------------------- */
/* I2C port base addresses (for convenience) */
#define I2C0 I2C0_BASE
#define I2C1 I2C1_BASE
/* --- I2C registers ------------------------------------------------------- */
/* I2C Control Set Register */
#define I2C_CONSET(port) MMIO32(port + 0x000)
#define I2C0_CONSET I2C_CONSET(I2C0)
#define I2C1_CONSET I2C_CONSET(I2C1)
/* I2C Status Register */
#define I2C_STAT(port) MMIO32(port + 0x004)
#define I2C0_STAT I2C_STAT(I2C0)
#define I2C1_STAT I2C_STAT(I2C1)
/* I2C Data Register */
#define I2C_DAT(port) MMIO32(port + 0x008)
#define I2C0_DAT I2C_DAT(I2C0)
#define I2C1_DAT I2C_DAT(I2C1)
/* I2C Slave Address Register 0 */
#define I2C_ADR0(port) MMIO32(port + 0x00C)
#define I2C0_ADR0 I2C_ADR0(I2C0)
#define I2C1_ADR0 I2C_ADR0(I2C1)
/* SCH Duty Cycle Register High Half Word */
#define I2C_SCLH(port) MMIO32(port + 0x010)
#define I2C0_SCLH I2C_SCLH(I2C0)
#define I2C1_SCLH I2C_SCLH(I2C1)
/* SCL Duty Cycle Register Low Half Word */
#define I2C_SCLL(port) MMIO32(port + 0x014)
#define I2C0_SCLL I2C_SCLL(I2C0)
#define I2C1_SCLL I2C_SCLL(I2C1)
/* I2C Control Clear Register */
#define I2C_CONCLR(port) MMIO32(port + 0x018)
#define I2C0_CONCLR I2C_CONCLR(I2C0)
#define I2C1_CONCLR I2C_CONCLR(I2C1)
/* Monitor mode control register */
#define I2C_MMCTRL(port) MMIO32(port + 0x01C)
#define I2C0_MMCTRL I2C_MMCTRL(I2C0)
#define I2C1_MMCTRL I2C_MMCTRL(I2C1)
/* I2C Slave Address Register 1 */
#define I2C_ADR1(port) MMIO32(port + 0x020)
#define I2C0_ADR1 I2C_ADR1(I2C0)
#define I2C1_ADR1 I2C_ADR1(I2C1)
/* I2C Slave Address Register 2 */
#define I2C_ADR2(port) MMIO32(port + 0x024)
#define I2C0_ADR2 I2C_ADR2(I2C0)
#define I2C1_ADR2 I2C_ADR2(I2C1)
/* I2C Slave Address Register 3 */
#define I2C_ADR3(port) MMIO32(port + 0x028)
#define I2C0_ADR3 I2C_ADR3(I2C0)
#define I2C1_ADR3 I2C_ADR3(I2C1)
/* Data buffer register */
#define I2C_DATA_BUFFER(port) MMIO32(port + 0x02C)
#define I2C0_DATA_BUFFER I2C_DATA_BUFFER(I2C0)
#define I2C1_DATA_BUFFER I2C_DATA_BUFFER(I2C1)
/* I2C Slave address mask register 0 */
#define I2C_MASK0(port) MMIO32(port + 0x030)
#define I2C0_MASK0 I2C_MASK0(I2C0)
#define I2C1_MASK0 I2C_MASK0(I2C1)
/* I2C Slave address mask register 1 */
#define I2C_MASK1(port) MMIO32(port + 0x034)
#define I2C0_MASK1 I2C_MASK1(I2C0)
#define I2C1_MASK1 I2C_MASK1(I2C1)
/* I2C Slave address mask register 2 */
#define I2C_MASK2(port) MMIO32(port + 0x038)
#define I2C0_MASK2 I2C_MASK2(I2C0)
#define I2C1_MASK2 I2C_MASK2(I2C1)
/* I2C Slave address mask register 3 */
#define I2C_MASK3(port) MMIO32(port + 0x03C)
#define I2C0_MASK3 I2C_MASK3(I2C0)
#define I2C1_MASK3 I2C_MASK3(I2C1)
/* --- I2Cx_CONCLR values -------------------------------------------------- */
#define I2C_CONCLR_AAC (1 << 2) /* Assert acknowledge Clear */
#define I2C_CONCLR_SIC (1 << 3) /* I2C interrupt Clear */
#define I2C_CONCLR_STAC (1 << 5) /* START flag Clear */
#define I2C_CONCLR_I2ENC (1 << 6) /* I2C interface Disable bit */
/* --- I2Cx_CONSET values -------------------------------------------------- */
#define I2C_CONSET_AA (1 << 2) /* Assert acknowledge flag */
#define I2C_CONSET_SI (1 << 3) /* I2C interrupt flag */
#define I2C_CONSET_STO (1 << 4) /* STOP flag */
#define I2C_CONSET_STA (1 << 5) /* START flag */
#define I2C_CONSET_I2EN (1 << 6) /* I2C interface enable */
/* --- I2C const definitions ----------------------------------------------- */
#define I2C_WRITE 0
#define I2C_READ 1
/* --- I2C function prototypes --------------------------------------------- */
BEGIN_DECLS
void i2c0_init(const uint16_t duty_cycle_count);
void i2c0_tx_start(void);
void i2c0_tx_byte(uint8_t byte);
uint8_t i2c0_rx_byte(void);
void i2c0_stop(void);
END_DECLS
/**@}*/
#endif