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5 years, 6 months ago.
ST Link and custom board(Nucleo STM32L053)
I bought Nucleo STM32L053 board and started programming it with mbed. I tested my board with the already uploaded projects(Blinky, Hello World, etc.). Everything was ok. However, I have to carry out some experiments at the temperature above 50°C, which seems to be too much for Nucleo. So, I designed and ordered my own PCB with the same microcontroller and decided to debug my board with STLink(using mbed libraries). I simply looked at the Nucleo scheme and connected SWD signals, Rx and Tx from STLink to the same pins in the microcontroller(which is advised in the Nucleo manual). I removed CN2 jumpers and desoldered SB12 solder bridge. The same with GND and power supply. I left only Boot0 floating(mistake?) and there is no MCO signal on my board.
To load the flash memory, I used STLink Utility and according to command prompt, everything is ok. Utility verifies the software and everything seems to be correct. I could flash binary, 'Nucleo' drive is displayed as a drive in Computer folder and I can drag and drop there binaries. However, I don't get any message over COM port(TeraTerm), which I always had with Nucleo.
I read related topics, which had been posted here: https://developer.mbed.org/questions/3811/Prototype-to-Hardware-with-Nucleo/ http://developer.mbed.org/users/chris/notebook/prototype-to-hardware/ https://developer.mbed.org/forum/electronics/topic/5184/?page=1#comment-25504
Unofortunately, I didn't find any solution to my problem. Is there anyone, who encountered similar problem? Are BOOT0 and MCO necessary?
I'd appreciate any advice,