/* * 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 funtion prototypes----------------------------------------------- */ void i2c0_init(void); void i2c0_tx_start(void); void i2c0_tx_byte(u8 byte); u8 i2c0_rx_byte(void); void i2c0_stop(void); #endif