mirror of
https://github.com/eddyem/stm32samples.git
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88 lines
3.7 KiB
C
88 lines
3.7 KiB
C
/*
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* This file is part of the I2Ctiny project.
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* Copyright 2024 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* commands from USB, must e.g. match command ids in kernel driver */
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#define CMD_ECHO 0
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#define CMD_GET_FUNC 1
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#define CMD_SET_DELAY 2
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#define CMD_GET_STATUS 3
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#define CMD_I2C_IO 4
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#define CMD_I2C_BEGIN 1 // flag fo I2C_IO
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#define CMD_I2C_END 2 // flag fo I2C_IO
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/* linux kernel flags */
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#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
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#define I2C_M_RD 0x01
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#define I2C_M_NOSTART 0x4000
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#define I2C_M_REV_DIR_ADDR 0x2000
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#define I2C_M_IGNORE_NAK 0x1000
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#define I2C_M_NO_RD_ACK 0x0800
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/* To determine what functionality is present */
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#define I2C_FUNC_I2C 0x00000001
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#define I2C_FUNC_10BIT_ADDR 0x00000002
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#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
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#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
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#define I2C_FUNC_NOSTART 0x00000010 /* I2C_M_NOSTART */
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#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_QUICK 0x00010000
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#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
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#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
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#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
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#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
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#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
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#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
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#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
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#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
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#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
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#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
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#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
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#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
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#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
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#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
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#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
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I2C_FUNC_SMBUS_WRITE_BYTE
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#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
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I2C_FUNC_SMBUS_WRITE_BYTE_DATA
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#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
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I2C_FUNC_SMBUS_WRITE_WORD_DATA
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#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
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#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
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I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
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#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
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I2C_FUNC_SMBUS_BYTE | \
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I2C_FUNC_SMBUS_BYTE_DATA | \
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I2C_FUNC_SMBUS_WORD_DATA | \
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I2C_FUNC_SMBUS_PROC_CALL | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
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I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
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I2C_FUNC_SMBUS_I2C_BLOCK
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#define STATUS_IDLE 0
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#define STATUS_ADDRESS_ACK 1
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#define STATUS_ADDRESS_NACK 2
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