Hxc-fw-installer.hex
| Issue | Likely Fix | |-------|-------------| | No chip detected | Check RX/TX crossover, GND, and 3.3V logic level. Verify BOOT0 is set. | | Flash fails mid‑way | Reduce baud rate to 9600. Recheck power supply. | | Device not booting after flash | Reflash, verify verify checksum. Ensure BOOT0 is removed. | | “Not in bootloader mode” | Short BOOT0 to VCC (3.3V) powering on, keep it shorted during flash. |
Double-check every connection. A reversed SWDIO/SWCLK will fail silently. Hxc-fw-installer.hex