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LumaOps release export
2026-09-03 01:18:36 +02:00
commit 7f1c0e5f71
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i2c_tools/i2c_tools.cpp
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/*---------------------------------------------------------*\
| i2c_tools.cpp |
| |
| Utility functions for communicating with and reverse |
| engineering i2c devices |
| |
| This file is part of the OpenRGB project |
| SPDX-License-Identifier: GPL-2.0-or-later |
\*---------------------------------------------------------*/
#include "i2c_tools.h"
/******************************************************************************************\
* *
* i2c_detect *
* *
* Prints a list of all detected I2C addresses on the given bus *
* *
* bus - pointer to i2c_smbus_interface to scan *
* mode - one of AUTO, QUICK, READ, FUNC - method of access *
* *
* Code adapted from i2cdetect.c from i2c-tools Linux package *
* *
\******************************************************************************************/
std::string i2c_detect(i2c_smbus_interface * bus, int mode)
{
int i, j;
int first = 0x03, last = 0x77;
int res;
int slave_addr;
char line[128];
std::string text;
snprintf(line, 128, " 0 1 2 3 4 5 6 7 8 9 a b c d e f\r\n");
text.append(line);
for (i = 0; i < 128; i += 16)
{
snprintf(line, 128, "%02x: ", i);
text.append(line);
for (j = 0; j < 16; j++)
{
/* Skip unwanted addresses */
if (i+j < first || i+j > last)
{
snprintf(line, 128, " ");
text.append(line);
continue;
}
/* Set slave address */
slave_addr = i + j;
/* Probe this address */
switch (mode)
{
case MODE_QUICK:
res = bus->i2c_smbus_write_quick(slave_addr, I2C_SMBUS_WRITE);
break;
case MODE_READ:
res = bus->i2c_smbus_read_byte(slave_addr);
break;
case MODE_READ_DATA:
res = bus->i2c_smbus_read_byte_data(slave_addr, 0);
break;
default:
if ((i + j >= 0x30 && i + j <= 0x37)
|| (i + j >= 0x50 && i + j <= 0x5F))
res = bus->i2c_smbus_read_byte(slave_addr);
else
res = bus->i2c_smbus_write_quick(slave_addr, I2C_SMBUS_WRITE);
break;
}
if (res < 0)
{
snprintf(line, 128, "-- ");
text.append(line);
}
else
{
snprintf(line, 128, "%02x ", i + j);
text.append(line);
}
}
snprintf(line, 128, "\r\n");
text.append(line);
}
return text;
} /* i2c_detect() */
/******************************************************************************************\
* *
* i2c_dump *
* *
* Prints the values at each address of a given SMBus device *
* *
* bus - pointer to i2c_smbus_interface to scan *
* address - SMBus device address to scan *
* *
\******************************************************************************************/
std::string i2c_dump(i2c_smbus_interface * bus, unsigned char address)
{
int i, j;
int start = 0x0000;
char line[128];
std::string text;
snprintf(line, 128, " 0 1 2 3 4 5 6 7 8 9 a b c d e f\r\n");
text.append(line);
for (i = 0; i < 0xFF; i += 16)
{
snprintf(line, 128, "%04x: ", i + start);
text.append(line);
for (j = 0; j < 16; j++)
{
snprintf(line, 128, "%02x ", (unsigned char )bus->i2c_smbus_read_byte_data(address, start + i + j));
text.append(line);
}
snprintf(line, 128, "\r\n");
text.append(line);
}
return text;
} /* i2c_dump() */
/******************************************************************************************\
* *
* i2c_read *
* *
* Prints <size> values read from register address regaddr of a given SMBus device *
* *
* bus - pointer to i2c_smbus_interface to scan *
* address - SMBus device address to scan *
* regaddr - register address to read from *
* size - number of bytes to read *
* *
\******************************************************************************************/
std::string i2c_read(i2c_smbus_interface * bus, unsigned char address, unsigned char regaddr, unsigned char size)
{
int i;
bus->i2c_smbus_write_byte(address, regaddr);
char line[128];
std::string text;
for(i = 0; i < size; i++)
{
snprintf(line, 128, "%02x ", (unsigned char)bus->i2c_smbus_read_byte(address));
text.append(line);
}
return text;
} /* i2c_read() */
i2c_tools/i2c_tools.h
+24
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/*---------------------------------------------------------*\
| i2c_tools.h |
| |
| Utility functions for communicating with and reverse |
| engineering i2c devices |
| |
| This file is part of the OpenRGB project |
| SPDX-License-Identifier: GPL-2.0-or-later |
\*---------------------------------------------------------*/
#include <string>
#include "i2c_smbus.h"
#define MODE_AUTO 0
#define MODE_QUICK 1
#define MODE_READ 2
#define MODE_READ_DATA 3
#define MODE_FUNC 4
std::string i2c_detect(i2c_smbus_interface * bus, int mode);
std::string i2c_dump(i2c_smbus_interface * bus, unsigned char address);
std::string i2c_read(i2c_smbus_interface * bus, unsigned char address, unsigned char regaddr, unsigned char size);