ReadI2C

Syntax

LONG ReadI2C (LONG nDeviceAddr, LONG nRegisterAddr, BYTE* pbDATA, LONG nLen)

Description

Using ReadI2C(), you can read data over the I2C bus of a board level camera.

For information on the signals applied to the I2C bus, refer to the chapters with electrical specifications for the USB uEye LE and the USB uEye ME.

Hinweis

The ReadI2C() function is only supported by PCB versions of the USB uEye ME/LE camera series.

Achtung

The uEye processes I2C addresses in a 7-bit format that is created from the 8-bit format by a bit shift to the right. The eighth bit indicates whether an address is a read (1) or write (0) address.

The following addresses for nRegisterAddr are assigned to the uEye and must not be used:

7-bit format: 0x10, 0x48, 0x4C, 0x50, 0x51, 0x52, 0x55, 0x5C, 0x5D, 0x69

8-bit format: 0x20, 0x90, 0x98, 0xA0, 0xA2, 0xA4, 0xAA, 0xB8, 0xBA, 0xD2-bit address 0x48 is the write address 0x90 and the read address 0x91 in 8-bit format.

Parameters

nDeviceAddr	Slave device address in 7-bit format
nRegisterAddr	Register address (only 8-bit addresses are valid)
pbData	Pointer to the data to be read
nLen	Data length nLen = 1: 8 bits data nLen = 2: 16 bits data

Return values

IS_SUCCESS	Function executed successfully
IS_NO_SUCCESS	General error message
IS_INVALID_I2C_DEVICE_ADDRESS	Invalid I2C device address

Related functions

•WriteI2C()

Suggestion for improvement? Send us your short Feedback on this chapter. Thank you very much!

For technical questions please contact you local distributor or use the support form on our website.

Home > Function descriptions >	History back Previous chapter Next chapter Print
ReadI2C