I run the prj_bass project, but it can not work.
I debug it with jlink, found that BLE stack APIs locate at the address around 0x01000000~0x0102000 (defined in fw_func_addr.h), but the content of the chip in the range is all 0xFF.
SDK version 1.4.0
The marking letter of chip is "9021 355Y5 00UMF"
I use the macro QN_9020_B4