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#ifndef __PROTOCOL_I2C_I2C_H__
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#define __PROTOCOL_I2C_I2C_H__
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#include "global.h"
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#ifndef ASM_FILE
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enum i2c_result
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{
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I2C_RESULT_OK = 0,
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I2C_RESULT_BAD_OBJECT,
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I2C_RESULT_INVALID_STATE,
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I2C_RESULT_INVALID_ARGUMENT,
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I2C_RESULT_UNSUPPORTED,
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I2C_RESULT_UNKNOWN_ERROR,
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I2C_RESULT_NAK,
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};
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struct __attribute__((packed,aligned(4))) i2c_transaction
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{
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uint16_t address;
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uint8_t reserved;
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uint8_t transfercount;
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struct __attribute__((packed,aligned(4))) i2c_transfer
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{
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enum __attribute__((packed)) i2c_transfer_type
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{
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I2C_TRANSFER_TYPE_TX,
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I2C_TRANSFER_TYPE_RX,
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I2C_TRANSFER_TYPE_CONT,
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} type;
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uint8_t reserved;
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uint16_t len;
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union __attribute__((packed,aligned(4)))
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{
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const void* txbuf;
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void* rxbuf;
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};
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} transfers[];
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};
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struct i2c_driver;
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struct i2c_driver_instance
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{
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const struct i2c_driver* driver;
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const void* driver_config;
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void* driver_state;
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};
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struct i2c_driver
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{
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enum i2c_result (*init)(const struct i2c_driver_instance* instance);
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enum i2c_result (*txn)(const struct i2c_driver_instance* instance, const struct i2c_transaction* transaction);
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};
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extern enum i2c_result i2c_init(const struct i2c_driver_instance* instance);
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extern enum i2c_result i2c_txn(const struct i2c_driver_instance* instance, const struct i2c_transaction* transaction);
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extern enum i2c_result i2c_read_regs(const struct i2c_driver_instance* instance, int address, int reg, void* buf, int len);
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extern enum i2c_result i2c_write_regs(const struct i2c_driver_instance* instance, int address, int reg, const void* buf, int len);
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#endif
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#endif
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