| /**************************************************************************** |
| * arch/arm/src/lpc214x/lpc214x_i2c.h |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| #ifndef __ARCH_ARM_SRC_LPC214X_LPC214X_I2C_H |
| #define __ARCH_ARM_SRC_LPC214X_LPC214X_I2C_H |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include "chip.h" |
| |
| /**************************************************************************** |
| * Pre-processor Definitions |
| ****************************************************************************/ |
| |
| /* Register address Offsets *************************************************/ |
| |
| /* Defined in chip.h */ |
| |
| /* Register Address Definitions *********************************************/ |
| |
| #define LPC214X_I2C0_CONSET (LPC214X_I2C0_BASE + LPC214X_I2C_ONSET_OFFSET) |
| #define LPC214X_I2C0_STAT (LPC214X_I2C0_BASE + LPC214X_I2C_STAT_OFFSET) |
| #define LPC214X_I2C0_DAT (LPC214X_I2C0_BASE + LPC214X_I2C_DAT_OFFSET) |
| #define LPC214X_I2C0_ADR (LPC214X_I2C0_BASE + LPC214X_I2C_ADR_OFFSET) |
| #define LPC214X_I2C0_SCLH (LPC214X_I2C0_BASE + LPC214X_I2C_SCLH_OFFSET) |
| #define LPC214X_I2C0_SCLL (LPC214X_I2C0_BASE + LPC214X_I2C_SCLL_OFFSET) |
| #define LPC214X_I2C0_CONCLR (LPC214X_I2C0_BASE + LPC214X_I2C_ONCLR_OFFSET) |
| |
| #define LPC214X_I2C1_CONSET (LPC214X_I2C1_BASE + LPC214X_I2C_ONSET_OFFSET) |
| #define LPC214X_I2C1_STAT (LPC214X_I2C1_BASE + LPC214X_I2C_STAT_OFFSET) |
| #define LPC214X_I2C1_DAT (LPC214X_I2C1_BASE + LPC214X_I2C_DAT_OFFSET) |
| #define LPC214X_I2C1_ADR (LPC214X_I2C1_BASE + LPC214X_I2C_ADR_OFFSET) |
| #define LPC214X_I2C1_SCLH (LPC214X_I2C1_BASE + LPC214X_I2C_SCLH_OFFSET) |
| #define LPC214X_I2C1_SCLL (LPC214X_I2C1_BASE + LPC214X_I2C_SCLL_OFFSET) |
| #define LPC214X_I2C1_CONCLR (LPC214X_I2C1_BASE + LPC214X_I2C_ONCLR_OFFSET) |
| |
| /* I2C register bit definitions *********************************************/ |
| |
| /* Control Set Register (CONSET) */ |
| |
| #define I2C_CONSET_AA (1 << 2) /* Bit 2: Assert acknowledge flag */ |
| #define I2C_CONSET_SI (1 << 3) /* Bit 3: I2C interrupt flag */ |
| #define I2C_CONSET_STO (1 << 4) /* Bit 4: STOP flag */ |
| #define I2C_CONSET_STA (1 << 5) /* Bit 5: START flag */ |
| #define I2C_CONSET_I2EN (1 << 6) /* Bit 6: I2C interface enable */ |
| |
| /* Control Clear Register (CONCLR) */ |
| |
| #define I2C_CONCLR_AAC (1 << 2) /* Bit 2: Assert acknowledge Clear bit */ |
| #define I2C_CONCLR_SIC (1 << 3) /* Bit 3: I2C interrupt Clear bit */ |
| #define I2C_CONCLR_STAC (1 << 5) /* Bit 5: START flag Clear bit */ |
| #define I2C_CONCLR_I2ENC (1 << 6) /* Bit 6: I2C interface Disable bit */ |
| |
| /* Status Register (STAT) */ |
| |
| #define I2C_STAT_SHIFT (1 << 3) /* Bits 3-7: Status bits */ |
| #define I2C_STAT_MASK (0xff << I2C_STAT_SHIFT) |
| |
| /* Master transmit mode */ |
| |
| # define I2C_STAT_MXSTART (0 << I2C_STAT_SHIFT) /* Start transmitted */ |
| # define I2C_STAT_MXRSTART (2 << I2C_STAT_SHIFT) /* Repeated start transmitted */ |
| # define I2C_STAT_MXSLAWACK (3 << I2C_STAT_SHIFT) /* SLA+W transmitted + ACK received */ |
| # define I2C_STAT_MXSLAWNAK (4 << I2C_STAT_SHIFT) /* SLA+W transmitted + NAK received */ |
| # define I2C_STAT_MXDATAACK (5 << I2C_STAT_SHIFT) /* Data transmitted + ACK received */ |
| # define I2C_STAT_MXDATANAK (6 << I2C_STAT_SHIFT) /* Data transmitted + NAK received */ |
| # define I2C_STAT_MXARBLOST (7 << I2C_STAT_SHIFT) /* Arbitration lost in SLA+W or data */ |
| |
| /* Master receive mode */ |
| |
| # define I2C_STAT_MRSTART (0 << I2C_STAT_SHIFT) /* Start transmitted */ |
| # define I2C_STAT_MRRSTART (2 << I2C_STAT_SHIFT) /* Repeated start transmitted */ |
| # define I2C_STAT_MRARBLOST (7 << I2C_STAT_SHIFT) /* Arbitration lost in NAK bit */ |
| # define I2C_STAT_MRSLARACK (8 << I2C_STAT_SHIFT) /* SLA+R transmitted + ACK received */ |
| # define I2C_STAT_MRSLARNAK (9 << I2C_STAT_SHIFT) /* SLA+R transmitted + NAK received */ |
| # define I2C_STAT_MRDATAACK (10 << I2C_STAT_SHIFT) /* Data received + send ACK */ |
| # define I2C_STAT_MRDATANAK (11 << I2C_STAT_SHIFT) /* Data received + send NAK */ |
| |
| /* Slave receive mode -- to be provided */ |
| |
| /* Slave receive mode -- to be provided */ |
| |
| /* Data Register (DAT) -- 8-bits of data */ |
| |
| /* Slave Address Register (ADR) */ |
| |
| #define I2C_ADR_GCA (1 << 0) /* Bit 0: General call enable */ |
| #define I2C_ADR_SHIFT 1 /* Bits 7-1: address */ |
| #define I2C_ADR_MASK (0x7f << I2C_ADR_SHIFT) |
| |
| /* SCL Duty Cycle Register (high half word - SCLH) - 16-bits of data */ |
| |
| /* SCL Duty Cycle Register (low half word - SCLL) - 16-bits of data */ |
| |
| /**************************************************************************** |
| * Public Types |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Inline Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Public Function Prototypes |
| ****************************************************************************/ |
| |
| #endif /* __ARCH_ARM_SRC_LPC214X_LPC214X_I2C_H */ |
