Looks like the register address you want to read is 0x300A.
Can you please check the higher address that is passed to Preamble2.buffer. It should be 0x30.
There is no need of ANDing with 0xff00 and shifting right 8 bits. Hence, it passing as 0x00.
I include the "cyu3imagesensor.c" and the "cyu3imagesensor.h" into "CX3RDK_OV5640"
and wite code in cyu3imagesensor hope to to read the value by i2c.
but it always failed, is anyone know how to Read/Wrte Register to CX3+OV5640 RDK by i2c?
Is the failed reason cause the OV5640 through by SCCB?
Please check my previous response in the thread.
Is the issue solved?