Spi DR register no data inside, but I use an oscilloscope to see sdi also all data above, CLK clock is normal also, when the spi baud rate is adjusted for 16 points frequency is 72/16=4.5 M
The clock can be normal to receive data, the reasons for this situation is likely to be where, MCU. I am using STM32F103RBT6

CodePudding user response:

Lz want to clear what is no data definition; 0 can be defined as no data, also can 0 XFF positioning for no data, can also no matter what data, just ignore this group of data, or other defined

CodePudding user response:

0 XFFFF defined as no data, no change, the actual measured data is 0 x7xxx