60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/**
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MIT License
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Copyright (c) 2025 Benjamin Wiegand
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <stddef.h>
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#include "hardware/i2c.h"
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#define SMBUS_ERROR_DEVICE -1
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#define SMBUS_ERROR_GENERIC -2
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#define SMBUS_ERROR_CRC -3
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#ifndef I2C_DEV_DEF
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#define I2C_DEV_DEF
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struct i2c_dev {
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i2c_inst_t* i2c;
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uint8_t address;
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uint timeout;
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};
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typedef struct i2c_dev i2c_dev_t;
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#endif
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i2c_dev_t* get_bms_dev();
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i2c_dev_t* get_laptop_dev();
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int i2c_stop_read_blocking(i2c_dev_t* device);
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int generate_smbus_crc(uint8_t address, uint8_t cmd, uint8_t* reply, uint8_t length, bool is_block, bool is_read);
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bool validate_smbus_crc(uint8_t address, uint8_t cmd, uint8_t* reply, uint8_t length, uint8_t recieved_crc, bool is_block, bool is_read);
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int smbus_read(i2c_dev_t* device, uint8_t cmd, uint8_t* result, size_t length);
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int smbus_read_block(i2c_dev_t* device, uint8_t cmd, uint8_t* result, size_t max_length);
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int smbus_read_uint16(i2c_dev_t* device, uint8_t cmd, uint16_t* result);
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int smbus_read_text(i2c_dev_t* device, uint8_t cmd, char* result, size_t max_length);
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