Hi, Everyone,
I am having a strange problem with my board loaded STM32F103C8T6:
Case 1: With blank MCU, Bootloader via USART1 can only be activated ONCE after power up. (Boot0 pin was soldered to Vcc for testing.) It will never be able to enter BL again after disconnect until power cycled. Error message from programmer:
Case 2: If firmware is downloaded first (via SWD), BL will be able to launch with either power on or reset manually after power on. But some time still fail by manual reset. (about 50%) Here is the screen once it is lauched:
Any idea everyone??? I am in screwed.
