Best posts made by Max Peng

Hi,
I try to use SPI to communicate with TI RF chip. But the first byte(register address) of a packet is not what I expected.
For example, I send 0x40 will become 0xC0, I send 0x80 will become 0x00.
The MSB is not correct, it become the same with bit 6.
Anyone know how to solve this?
Please!
Regards,
Max.