Questions tagged [swd]
Serial Wire Debug (SWD) is a 2-pin electrical alternative JTAG interface that shares a common functional protocol with JTAG for processor debug.
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error in stlink utility
I am having difficulty connecting the ST-LINK/V2 to my microcontroller. An error appears in the ST-LINK utility. I have already verified all the connections, including the decoupling capacitor, all ...
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ARM SWD Programming Problems
I am trying to erase a NRF52840 and the erasing fails. This is the relevant schematics:
Notice that SWDIO is tied to the unused P1.01 for ease of placement and routing. Similarly SWDCLK is tied to P1....
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STM32 SWD Debug Hangs
I try to debug my PCB, which has STM32G030, with SWD in a 3kHz noisy environment. SWCLK and SWDIO traces have both 22 Ohms series and 10k Ohms pull-up resistors attached to them. As the noise source ...
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How does STM32 know if I'm using SWD or JTAG
My curiosity got the best of me so I'm hoping someone here can help educate me. I'm using a STM32 (STM32F101C8Tx to be precise), which supports both JTAG and SWD. Within STM32CubeIDE I can switch ...
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Connecting SWD on a same pin as an I/O pin
I'm working on a PCB with a specific number of pins. There are 12 pins on the PCB, used by another device to transfer data and communicate with the chip. I have +3V3, GND, RST, pins for I/O, and an ...
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Controlling GPIO pins via SWD interface
I am working at test jig for low-volume production. The purpose is both flashing firmware and testing PCBA with STM32 MCU. I am considering few options for testing PCBA functionality:
Testing on &...
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What hardware/software do I need to connect to SWD on an NXP LPC820 ARM MCU?
I have a Li-po battery pack that I'd like to debug. The on-board BMS has an NXP LPC820 MCU and I've identified the SWD header.
My reason for doing this is that one of the 5 cells went bad, which I've ...
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How can I protect MCU SWD portf from ESD?
I have connected two TVS diodes close to header, and Resistor for limiting the current.
Is it enough to protect the ports from ESD or i need to add anything else or correct this schematics?
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ERF32 programming with SWD
I need some help with programming board with EFR32FG22 (Datasheet). I've always used arduinos or esp32/8266, so I'm new to this type of MCU's. I know that I should use SWD pins (SWDIO and SWCLK) which ...
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STM32H7 flashing problem
I have been having a problem with my STM32H725IGT custom PCB, because I can't flash it even though i tried almost everything. I have tried flashing from nucleo's programmer and from stlink-v2 clones ...
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SWD Connection to MCU and Appropriate Configuration for Reset Pin
I aim to establish a connection between SWD header and an STM32 MCU on PCB, having identified the relevant pins on MCU (SWO, SWCLK, and SWDIO). I have two inquiries:
Is it appropriate to connect ...
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STM32H755ZIT6 STLINK Debug
I've just got new NUCLEO STM32H755ZIT6 board with STLinkV3 on it.
I just want to debug simple empty STMCube project and after configuring board According it's
Please look in the UM2408 User manual (...
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Connecting to STM32 via SWD, Reverse Engineering
I have been reverse engineering my electric longboard remote for the past couple days and have been attempting to get a ST Link V2 connecting to it via some test pads on the PCB I found. I know the ...
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Powering NX3DV42 switch with 5 V?
I plan to use the NX3DV42 switch from NXP to switch between SWD and USB pins in a nRF53-based design. The goal is to provide USB in a default setting and SWD in an advanced setting by using a switch ...
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Ice40 SB_IO primitive input has glitches
I am trying to implement SWD protocol on ICE40 USB stick using Verilog. I have designed the SWDIO as inout in my program whose direction is controlled by a wire ...
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