IDS Software Suite 4.96.1
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USB 2.0 USB 3.x GigE |
USB 2.0 USB 3.x GigE |
Syntax
INT is_ReadI2C (HIDS hCam, INT nDeviceAddr, INT nRegisterAddr, BYTE* pbData, INT nLen)
Description
Using is_ReadI2C(), you can read data over the TWI (Two Wire Interface) of a board level camera.
The function expects the device address as an 8-bit value, which is generated by a bit shift to the left from the 7-bit address of the device according to the data sheet. The function automatically fills bit 0 to indicate whether the device address is to be written (0) or read (1) from there.
For information on the signals applied to the TWI, refer to the D: Specifications chapters.
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I2C functions are only supported by the following PCB versions: •uEye LE USB 3.1 Gen 1 •USB 3 uEye LE •USB uEye LE •GigE uEye LE. |
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The following addresses for nDeviceAddr are assigned to the uEye camera and must not be used: 7-bit format: 0x10, 0x20, 0x21, 0x48, 0x49, 0x4C, 0x50, 0x51, 0x52, 0x55, 0x5C, 0x5D, 0x69, 0x77 8-bit format: 0x20, 0x40, 0x42, 0x90, 0x92, 0x98, 0xA0, 0xA2, 0xA4, 0xAA, 0xB8, 0xBA, 0xD2, 0xEE For UI-336x/UI-536x and UI-337x/UI-537x: 0x82 |
Input parameters
hCam |
Camera handle |
nDeviceAddr |
Slave device address (8 bit format) |
nRegisterAddr |
Address of a 8 bit register (only 8-bit addresses are valid) |
nRegisterAddr | |
Address of a 16 bit register |
nRegisterAddr | |
If only a device address but no register address exists. |
pbData |
Pointer to the data to be read |
nLen |
Data length nLen = 1: 8 bits data nLen = 2: 16 bits data |
Return values
IS_CANT_COMMUNICATE_WITH_DRIVER |
Communication with the driver failed because no driver has been loaded. |
IS_CANT_OPEN_DEVICE |
An attempt to initialize or select the camera failed (no camera connected or initialization error). |
IS_INVALID_CAMERA_HANDLE |
Invalid camera handle |
IS_INVALID_I2C_DEVICE_ADDRESS |
Invalid I2C device address |
IS_INVALID_PARAMETER |
One of the submitted parameters is outside the valid range or is not supported for this sensor or is not available in this mode. |
IS_IO_REQUEST_FAILED |
An IO request from the uEye driver failed. Possibly the versions of the ueye_api.dll (API) and the driver file (ueye_usb.sys or ueye_eth.sys) do not match. This error code is also returned if the micro controller does not report back with ACK. |
IS_NO_SUCCESS |
General error message |
IS_SUCCESS |
Function executed successfully |
Related functions
•is_DeviceFeature(): Setting the I2C stop bit
Example
•See is_WriteI2C()
