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NVAPI_INTERFACE | NvAPI_I2CRead (NvPhysicalGpuHandle hPhysicalGpu, NV_I2C_INFO *pI2cInfo) |
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NVAPI_INTERFACE | NvAPI_I2CWrite (NvPhysicalGpuHandle hPhysicalGpu, NV_I2C_INFO *pI2cInfo) |
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#define | NVAPI_MAX_SIZEOF_I2C_DATA_BUFFER 4096 |
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#define | NVAPI_MAX_SIZEOF_I2C_REG_ADDRESS 4 |
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#define | NVAPI_DISPLAY_DEVICE_MASK_MAX 24 |
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#define | NVAPI_I2C_SPEED_DEPRECATED 0xFFFF |
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#define | NV_I2C_INFO_VER3 MAKE_NVAPI_VERSION(NV_I2C_INFO_V3,3) |
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#define | NV_I2C_INFO_VER2 MAKE_NVAPI_VERSION(NV_I2C_INFO_V2,2) |
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#define | NV_I2C_INFO_VER1 MAKE_NVAPI_VERSION(NV_I2C_INFO_V1,1) |
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#define | NV_I2C_INFO_VER NV_I2C_INFO_VER3 |
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enum | NV_I2C_SPEED {
NVAPI_I2C_SPEED_DEFAULT
, NVAPI_I2C_SPEED_3KHZ
, NVAPI_I2C_SPEED_10KHZ
, NVAPI_I2C_SPEED_33KHZ
,
NVAPI_I2C_SPEED_100KHZ
, NVAPI_I2C_SPEED_200KHZ
, NVAPI_I2C_SPEED_400KHZ
} |
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typedef NV_I2C_INFO_V3 | NV_I2C_INFO |
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The I2C APIs are used to read or write data to DDC monitors using the I2C protocol.
◆ NV_I2C_INFO_VER
◆ NV_I2C_INFO_VER1
◆ NV_I2C_INFO_VER2
◆ NV_I2C_INFO_VER3
◆ NVAPI_DISPLAY_DEVICE_MASK_MAX
#define NVAPI_DISPLAY_DEVICE_MASK_MAX 24 |
◆ NVAPI_I2C_SPEED_DEPRECATED
#define NVAPI_I2C_SPEED_DEPRECATED 0xFFFF |
◆ NVAPI_MAX_SIZEOF_I2C_DATA_BUFFER
#define NVAPI_MAX_SIZEOF_I2C_DATA_BUFFER 4096 |
◆ NVAPI_MAX_SIZEOF_I2C_REG_ADDRESS
#define NVAPI_MAX_SIZEOF_I2C_REG_ADDRESS 4 |
◆ NV_I2C_INFO
◆ NV_I2C_SPEED
Enumerator |
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NVAPI_I2C_SPEED_DEFAULT | Set i2cSpeedKhz to I2C_SPEED_DEFAULT if default I2C speed is to be chosen, ie.use the current frequency setting.
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NVAPI_I2C_SPEED_3KHZ | |
NVAPI_I2C_SPEED_10KHZ | |
NVAPI_I2C_SPEED_33KHZ | |
NVAPI_I2C_SPEED_100KHZ | |
NVAPI_I2C_SPEED_200KHZ | |
NVAPI_I2C_SPEED_400KHZ | |
◆ NvAPI_I2CRead()
This function reads the data buffer from the I2C port. The I2C request must be for a DDC port: pI2cInfo->bIsDDCPort = 1.
A data buffer size larger than 16 bytes may be rejected if a register address is specified. In such a case, NVAPI_ARGUMENT_EXCEED_MAX_SIZE would be returned.
If a register address is specified (i.e. regAddrSize is positive), then the transaction will be performed in the combined format described in the I2C specification. The register address will be written, followed by reading into the data buffer.
SUPPORTED OS: Windows 10 and higher
- Since
- Release: 85
- Parameters
-
[in] | hPhysicalGPU | GPU selection. |
[out] | NV_I2C_INFO | *pI2cInfo The I2C data input structure |
- Return values
-
NVAPI_OK | Completed request |
NVAPI_ERROR | Miscellaneous error occurred. |
NVAPI_HANDLE_INVALIDATED | Handle passed has been invalidated (see user guide). |
NVAPI_EXPECTED_PHYSICAL_GPU_HANDLE | Handle passed is not a physical GPU handle. |
NVAPI_INCOMPATIBLE_STRUCT_VERSION | Structure version is not supported. |
NVAPI_INVALID_ARGUMENT | - argument does not meet specified requirements |
NVAPI_ARGUMENT_EXCEED_MAX_SIZE | - an argument exceeds the maximum |
◆ NvAPI_I2CWrite()
This function writes the data buffer to the I2C port.
The I2C request must be for a DDC port: pI2cInfo->bIsDDCPort = 1.
A data buffer size larger than 16 bytes may be rejected if a register address is specified. In such a case,
NVAPI_ARGUMENT_EXCEED_MAX_SIZE would be returned.
If a register address is specified (i.e. regAddrSize is positive), then the register address will be written
and the data buffer will immediately follow without a restart.
SUPPORTED OS: Windows 10 and higher
- Since
- Release: 85
- Parameters
-
[in] | hPhysicalGPU | GPU selection. |
[in] | pI2cInfo | The I2C data input structure |
- Return values
-
NVAPI_OK | Completed request |
NVAPI_ERROR | Miscellaneous error occurred. |
NVAPI_HANDLE_INVALIDATED | Handle passed has been invalidated (see user guide). |
NVAPI_EXPECTED_PHYSICAL_GPU_HANDLE | Handle passed is not a physical GPU handle. |
NVAPI_INCOMPATIBLE_STRUCT_VERSION | Structure version is not supported. |
NVAPI_INVALID_ARGUMENT | Argument does not meet specified requirements |
NVAPI_ARGUMENT_EXCEED_MAX_SIZE | Argument exceeds the maximum |