| /**************************************************************************** |
| * arch/arm/src/lc823450/lc823450_i2c.h |
| * |
| * 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_LC823450_LC823450_I2C_H |
| #define __ARCH_ARM_SRC_LC823450_LC823450_I2C_H |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| #include <nuttx/i2c/i2c_master.h> |
| |
| /**************************************************************************** |
| * Pre-processor Definitions |
| ****************************************************************************/ |
| |
| /* Register Addresses *******************************************************/ |
| |
| #define LC823450_I2C0_REGBASE 0x40089000 |
| #define LC823450_I2C1_REGBASE 0x4008A000 |
| |
| #define I2CCTL (0x0) |
| #define I2CSTR (0x4) |
| #define I2CTXD (0x8) |
| #define I2CRXD (0xC) |
| #define I2CCKS (0x10) |
| |
| /* Register Bitfield Definitions ********************************************/ |
| |
| /* Control register */ |
| |
| #define I2C_CTL_SDAD (1 << 0) /* Bit 0: SDA data output */ |
| #define I2C_CTL_SCLD (1 << 1) /* Bit 1: SCL data output */ |
| #define I2C_CTL_BC (1 << 2) /* Bit 2: Control I2C Bus forcely */ |
| #define I2C_CTL_SCLR (1 << 3) /* Bit 3: Clear internal state */ |
| #define I2C_CTL_IREQEN (1 << 4) /* Bit 4: Interrupt enable */ |
| #define I2C_CTL_ACK (1 << 5) /* Bit 5: ACK bit output enable */ |
| #define I2C_CTL_ST (1 << 6) /* Bit 6: Generate Start/Stop condition */ |
| #define I2C_CTL_TRX (1 << 7) /* Bit 7: TX or RX enable */ |
| #define I2C_CTL_SRST (1 << 8) /* Bit 8: Reset all registers */ |
| #define I2C_CTL_BTRIG (1 << 12) /* Bit 12: Trigger starting byte transfer/receive */ |
| #define I2C_CTL_FMODE (1 << 15) /* Bit 15: Fast or Standard mode enable */ |
| |
| /* Status register */ |
| |
| #define I2C_STR_SDAB (1 << 0) /* Bit 0: Monitor SDA pin */ |
| #define I2C_STR_SCLB (1 << 1) /* Bit 1: Monitor SCL pin */ |
| #define I2C_STR_ACKD (1 << 5) /* Bit 5: ACK detection */ |
| #define I2C_STR_IREQ (1 << 6) /* Bit 6: Interrupt status */ |
| #define I2C_STR_BBSY (1 << 7) /* Bit 7: Bus busy */ |
| |
| /**************************************************************************** |
| * Public Types |
| ****************************************************************************/ |
| |
| #ifndef __ASSEMBLY__ |
| |
| /**************************************************************************** |
| * Public Data |
| ****************************************************************************/ |
| |
| #ifdef __cplusplus |
| #define EXTERN extern "C" |
| extern "C" |
| { |
| #else |
| #define EXTERN extern |
| #endif |
| |
| /**************************************************************************** |
| * Public Function Prototypes |
| ****************************************************************************/ |
| |
| struct i2c_master_s *lc823450_i2cbus_initialize(int port); |
| int lc823450_i2cbus_uninitialize(struct i2c_master_s *dev); |
| void lc823450_i2cbus_changetimeout(struct i2c_master_s *dev, |
| uint32_t timeoms); |
| |
| #if defined(__cplusplus) |
| } |
| #endif |
| #undef EXTERN |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* __ARCH_ARM_SRC_LC823450_LC823450_I2C_H */ |
