About LW.1

LW.1 · 2020-03-10

Hi everyone,When my group was designing our PCB for the STM32WB55RG, we read page 38 of the datasheet (https://www.st.com/resource/en/datasheet/stm32wb55rg.pdf) and thought we only needed the HSE for BLE functionality. However, after soldering our bo...

LW.1 · 2020-03-03

Hi everyone,My group has made a custom board for the STM32WB55RG and included a 6-pin configuration for connecting it to a STLink V2 via SWD (target: VCC, SWO, SWDIO, SWCLK, NRST, GND). However in STLink Utility we keep getting an error message when ...

LW.1 · 2020-02-29

Hi everyone,Up until now I've been doing FUS upgrades and BLE stack flashing on my WB55 Nucleo through the USB bootloader interface, but given that my final PCB won't have a USB port on it (space restrictions), I've had to start learning how to flash...

LW.1 · 2020-03-09

Okay, we finally got it working. The reason SWDIO wasn't going high was because we hadn't soldered on the buck converter for it; once that was on and the MCU connections double-checked, we can connect to it now. Thanks @clive1 for your time!

LW.1 · 2020-03-08

Another update: on our Nucleo board, when it powers on, we see NRST go high, SWDIO go high, and SWCLK remain low. However on our board we only see NRST go high; SWDIO stays low. Should it be the same behaviour as the Nucleo? What could cause SWDIO to...

LW.1 · 2020-03-07

An update: turns out the NRST wasn't going high, so for now we've soldered a new board with just the MCU and the BOOT0. On this we see NRST go high after powering on the board with 3.3V, and BOOT0 is low, but STLink still doesn't recognize it. The de...

LW.1 · 2020-03-04

I see, so leaving out the external pullup probably isn't what's causing the issue? Is there anything else not soldering-related that we could check?

LW.1 · 2020-03-04

Good point, we don't have any pullup with the NRST on our board. Is this why the STLink can't detect anything? If so, we only have 10K resistors right now; will that work or does the pullup have to be 100K?As for setting the option bytes, I assume th...

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PCB is missing the LSE and not connecting over BLE - what are our options?

STLink doesn't detect WB55 on custom board

"Error: -- Reserved --" message when trying FUS upgrade via SWD

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