8
votes
Accepted
SWDAP vs CMSIS-DAP vs DAPLink
CMSIS is the generic name for ARM-specified infrastructure around Cortex processors. The project we know today as DAPLink actually started as mbedmicro/CMSIS-DAP, we can find multiple references of ...
- 1,728
5
votes
How to disable USB mass-storage in STLink on Nucleo?
In the recent STLinkUpgrade 3.3.0 I can see checkbox "Change Type" offering "Debug + Mass storage + VCP" or "Debug + VCP". Seems like the way to go.
To download the latest and greatest version: https:...
5
votes
Reverse engineering target chip to be used with OpenOCD
The JTAG specification (which is reasonably described on the wikipedia page) defines an IDCODE instruction as part of the mandatory implementation, and a scan chain intended for debug will typically ...
- 3,764
3
votes
Accepted
STM32 SWO & OpenOCD with Variable SysClock
It has been almost 3 years since I asked this question and, after some recent experimentation, I finally found something that works.
This was made more difficult because the register used to make this ...
- 168
3
votes
Accepted
Is it possible to get ST-LINK's virtual COM port working without launching any program in Ubuntu?
There should be no real interaction between GDB or OpenOCD and the virtual serial port of an STM32 Discovery or Nucleo board, however the modemmanager package ...
- 33.6k
3
votes
Accepted
Salvaged STM32 programming with ST-Link V2 clone
It turns out the MCU is not an STM32F031C6T6 as I (incorrectly) assumed. After finding another MCU from the same manufacturer, and searching for it's datasheet, I found that the manufacturer is called ...
- 161
3
votes
Accepted
CJTAG Bit Banging - Just Erase the Flash
CJTAG
CJTAG is defined in IEEE-Std-1149.7, an extension to JTAG. A TAP with .7 functionality is called a TAPC in the spec.
Main idea behind 1149.7 is to provide alternate wire protocols for JTAG, ...
- 1,728
2
votes
How to disable USB mass-storage in STLink on Nucleo?
It works only for boards with ST-Link V2. Boards with ST-Link V3 do not have this 'type' option, e.g. NUCLEO-H743ZI (V2) is fine, NUCLEO-H743ZI2 (V3) does not.
2
votes
SWDAP vs CMSIS-DAP vs DAPLink
DAPLink states that it uses the CMSIS-DAP protocol, which is supported by OpenOCD
CMSIS-DAP, as the name suggests, is a protocol and firmware developed by ARM - the company which designes the ...
- 1,233
2
votes
Live variable view using openOCD and VScode
Change the IDE to something with better debugger - for example eclipse with set of plugins or use preconfigured IDE like atollic studio.
The you can use tracing - to see live changes of the variable ...
- 2,594
2
votes
Flashing multi chips with JTAG using openocd
When you set a device's IR to BYPASS, it will map a one bit register with no CAPTURE and UPDATE actions to DR.
The IR has a fixed length, let's assume two bit:
...
- 12.7k
2
votes
Accepted
stm32f429 hardware development
NRST pin is hardwired directly to VDD so not all ways to reset the MCU core are available.
- 165k
2
votes
Accepted
Can't program multiple chips using JTAG
The comments suggest you are trying to operate in 'star topology', but as far as I know, that isn't a well defined implementation.
Please confirm you're using daisy chained topology, where the ...
- 3,764
2
votes
Accepted
ST-Link cannot software reset my STM32 MCUs over SWD
Direct connection of NRST to 3.3V VCC is wrong. Disconnect it.
- 165k
2
votes
OpenOCD: enabling SWD on STLINK-V3
Have you tried with the ST fork of openocd?
They claim "STMicroelectronics is actively working at merging these modifications in the official OpenOCD". As of today, from my experience, you ...
- 21
2
votes
Accepted
Does ARM gdb not have TUI layout support?
The TUI feature is optional upon building GDB. So it probably depends who compiled your arm-none-eabi-gdb.
There is a configuration option ...
- 5,127
2
votes
Accepted
Flashing TI chips with OpenOCD
What I needed is a cJTAG programming mode. CC2652 uses that by default. (This mode doesn't need TDI and TDO).
However, OpenOCD doesn't support cJTAG at the moment, and when it starts flashing the ...
- 969
2
votes
How to upload image to flash of PSoC with openocd?
Look inside /usr/share/openocd. Words in italics refer to the subfolders of that:
OpenOCD has so-called board scripts (TCL, of all languages!), which describe how to interface with some hardware. In ...
- 98.4k
1
vote
Accepted
Openocd cannot find CMSIS-DAP device
Replugging the USB cable works. However, as flaky as USB generally is, this particular problem is not a USB issue. It is a bug in openocd that is addressed by a ...
- 451
1
vote
Debugging Cortex-M7 with data cache
The Cortex-M7 processor has internal flag that identifies debugger accesses as either cacheable, or non-cacheable. Non-cacheable is the default, and it causes all requests to bypass the data cache.
...
- 9,021
1
vote
Debugging STM32 with OpenOCD, STM32 for VSCODE won't work or flash, Configuration issue maybe?
Here its how i configured it (im able to debug step to step and place breakpoints with the SWD port & a stlink v2 usb on a STM32F103VE) on Windows 10
The important thing was to set the openocd ...
- 111
1
vote
Accepted
OpenOCD throws "JTAG scan chain interrogation failed: all zeroes" error
This seems to have gotten rid of the errors for me
Go to the config file for the raspberry pi interface, this is most likely located in:
...
- 21
1
vote
Can't get Flyswatter2 probe to work with OpenOCD
The error message indicates that OpenOCD cannot connect to your debug probe. So as Chris Stratton already pointed out, the problem is related to the USB connection to the debug probe. The wiring ...
- 2,283
1
vote
Accepted
Live variable view using openOCD and VScode
I've tried using STM32CubeIDE and figured out that you can have Live Watch when using ST-link GDB server instead of OCD. Will test it on VScode and update.
- 45
1
vote
How to connect custom stm32 board to debugger
Check your board again, sometimes you can't image how funny u are.
And Try this shell when use ST-LINK SWD mode:
openocd_stlink.cfg:...
- 11
1
vote
How to connect custom stm32 board to debugger
I'd try the SVD file for STM32F429, as they are almost identical to the STM32F439, the only difference is that ...
1
vote
OPENOCD Error codes: How do I fix this?
The actual information is in this message
"Warn : There are no enabled taps. AUTO PROBING MIGHT NOT WORK!!"
Translation: You did not specify what you have connected to the JTAG chain, which ...
- 10.4k
1
vote
Intermittent NVM programming error
Try increasing the
adapter_nsrst_delay 100
to
adapter_nsrst_delay 200
I had a similar problem on the RPi-3B and custom ...
1
vote
Programming a STM32F407 with a Raspberry PI: No answer on JTDO
First You need to connect all VDD pins on the MCU to 3.3V and all VSS pins to GND. The approach in general seems reasonable.
If You are only starting I strongly suggest getting a Discovery oraz ...
- 1,233
Only top scored, non community-wiki answers of a minimum length are eligible