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Category Archives: Uncategorized
gcc “Multiple definition”, “first defined here” errors
Options for Code Generation Conventions
-fcommon
In C code, this option controls the placement of global variables defined without an initializer, known as tentative definitions in the C standard. Tentative definitions are distinct from declarations of a variable with the extern keyword, which do not allocate storage.
The default is -fno-common
, which specifies that the compiler places uninitialized global variables in the BSS section of the object file. This inhibits the merging of tentative definitions by the linker so you get a multiple-definition error if the same variable is accidentally defined in more than one compilation unit.
The -fcommon
places uninitialized global variables in a common block. This allows the linker to resolve all tentative definitions of the same variable in different compilation units to the same object, or to a non-tentative definition. This behavior is inconsistent with C++, and on many targets implies a speed and code size penalty on global variable references. It is mainly useful to enable legacy code to link without errors.
Inkscape 1.2
Release notes/1.2
The option to add margins to a document when resizing it is currently unavailable
3D Drucker (UV LCD, Stereolithography, SLA)
Migration from Qt5 to Qt6
Debugging QThread in Python
- PySide6
- PyQt6
PyCharm
PyCharm not stopping/showing PySide6 threads!!!, 07.02.2021
Debugger fails to start with “module ‘numpy.core’ has no attribute ‘numerictypes’ ” error if PyQT compatibility is set to “PySide2” or Auto, 30.09.2021
vscode
Support pyside6 (without frame-eval mode) #709
QT5 Threads not captured in the debugger via VSCode #428
when use QThread Debug PyQt app, breakpoint not work,while wing IDE can debug #176
Breakpoints not working with QThread/PySide2 #304
QThread debugging regression after version 1.1.0 #526
Blaues Licht (Blue Protect, Blaulichtfilter)
Zeiss
Wie schädlich ist blaues Licht für die Augen? – Fakten, die Sie interessieren werden
Wie gefährlich blaues Licht für das menschliches Auge wirklich ist – Der Dualismus des blauen Lichts
Die zwei Seiten des blauen Lichts – Wie viel blaues Licht brauchen wir, und wann bzw. wie müssen wir uns davor schützen?
DuraVision BlueProtect von ZEISS – Blaulichtschutz für Ihre Augen
Rest
Segger J-Link RTT – Real Time Transfer
J-Link RTT – Real Time Transfer
wiki.segger.com: RTT
C:\Program Files\SEGGER\JLink\Samples\RTT\SEGGER_RTT_V754d.zip
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platformio
Segger RTT Library: printf debugging on Arduinos with arm processors
koendv/RTT Stream
lib_deps = koendv/RTT Stream
--- Available filters and text transformations: colorize, debug, default, direct, hexlify, log2file, nocontrol, printable, send_on_enter, time --- More details at https://bit.ly/pio-monitor-filters --- Miniterm on socket://localhost:19021 9600,8,N,1 --- --- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H --- SEGGER J-Link V7.50a - Real time terminal output SEGGER J-Link EDU V10.1, SN=XXXXXXXXX Process: JLinkGDBServerCL.exe setup! loop! loop! loop!
platformio.ini
Forum
Segger RTT with Bluepill
ARM Semihosting
ST-link
github.com/phryniszak/strtt, Segger RTT console using ST-link
Converting ST-LINK On-Board Into a J-Link
Tutorials
SEGGER J-Link Realtime Transfer – Fast Debug protocol
Where is my RTT control block?
nRF52840: SEGGER_RTT Gives You the Debug Output You Wished Arduino Had!
Forum
Qt Sidebar
Qt: Sidebar Qt Creator style
Qt Stylesheet Sidebar Tutorial
Designing a Qt Creator’s SideBar in C++
github.com/inobelar/QSidePanel
github.com/Qt-Widgets/Tutorial-Qt-Learn-Qt
github.com/Qt-Widgets/authpass-Password-Manager
github.com/Qt-Widgets/QSidePanel-Sidebar
github.com/Qt-Widgets/draw-over-video
github.com/Qt-Widgets/DeviceManagement-Hot-Plug-Serialport
Elektronik Spannungs-, Strom- und Leistungssensor
- common mode voltage (CMV)
Distrelec
4226 – INA260 Spannungs-, Strom- und Leistungssensor, Adafruit
904 – High Side-DC-Stromschalter INA219, Adafruit
935 – Breakout-Board MCP4725, Adafruit (DAC)
TI
TI Current/voltage/power monitors
INA3221, 26V, triple channel, 13-bit, i2c output current/voltage monitor w/alerts
LM5056A, 3 to 80V, 12-bit, pmbus output current/voltage/power/temperature monitor
INA199, 26V, bi-directional current sense amplifier
INA169, 2.7 to 60V, 440kHz Variable gain current sense amplifier
INA219, 26V, 12-bit, i2c output current/voltage/power monitor
Microchip
HV7802, High Side Current Monitor
Analog
LTC2946, Wide Range I2C Power, Charge and Energy Monitor
LT2940, Power and Current Monitor
LTC2992, Dual Wide Range Power Monitor
ADE7755, Energy Metering IC with Pulse Output
Current Monitoring with High Common Mode Voltages
CN0218, 500 V Common-Mode Voltage Current Monitor
AD8212, High Voltage Current Shunt Monitor
Maxim
UNDERSTANDING COMMON-MODE SIGNALS
SIMPLE HIGH-VOLTAGE SUPPLY FEATURES SINGLE IC AND SMALL SIZE
Beckhoff
Gleichtaktspannung und Bezugsmasse (bezogen auf Differenzeingänge)
Community
INA169: Interfacing INA169 with raspberry pi
Raise input for a voltage monitor IC
Every time I connect ADE measuring chip , it blows up
Tutorials
Bald Engineer – Low side vs. High side transistor switch
ROHM – High Side and Low Side Switches
INA219 Strom- und Leistungssensormodul
INA226 Strom- und Leistungssensor
ACS712 Stromsensor
ACS712 Current Sensor Working and Applications
Single-phase Energy Metering Circuit Applied in Food System Based on ADE7755 Chip
Design of electric energy metering circuit using ADE7755 intelligent watt hour meter