Thanks, BSTRobin Based on the data you sent me, I checked that it works well when I did it again. However, if you look at the datasheet in the Flash descriptor section below, you need to fill out the information, but I don't understand this part. To use QSPI, you need to use the Flash descriptor part, is there any related example code or data? It's not detailed in Datasheet. 3. Third, if you look at the bhi260 datasheet, it says that when writing firmware on flash, you should write firmware on 0x1F84. Flash descriptor is written on the first sector of Flash. The flash descriptor contains information about flash. It works without it. Without Flash decipher, it only works in the default SPI mode (slow and operational). When you apply the flash descriptor, it operates in full operation mode. QSPI is said to be available (because it is set to maximum). However, there is no mention of this in the relevant example of github. ( On the code)
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