Why is it impossible to evaluate a variable or set a breakpoint in STMicroelectronics Microcontrollers?
If you find it impossible to evaluate a value or variable, or to set a breakpoint at a specific line of code when working with STMicroelectronics Microcontrollers, the compiler optimization is probably enabled. Try removing it.
What to do if an unexpected power consumption is measured for a low-power application in STMicroelectronics STM32 Microcontrollers?
If you measure unexpected power consumption in a low-power application using STMicroelectronics Microcontrollers, ensure that low-power debug in the DBGMCU register is OFF. Note that this register resets only with a power-on reset (POR).
What to do if I fail to connect to a board with Normal/System Reset in STMicroelectronics Microcontrollers?
If you fail to connect to a board with Normal/System Reset when using STMicroelectronics Microcontrollers, try ConnectUnderReset / Hardware Reset connection mode. This resets the SWD connection in case it has been disabled by the application.
What to do if connection with target is lost during debug of low-power system in STMicroelectronics Microcontrollers?
If the connection with the target is lost during debug of a low-power system using STMicroelectronics Microcontrollers, ensure that debug in low-power in the DBGMCU register is enabled and that the SWD pin is not set in an analog state.
What to do if I fail to connect on board using ConnectUnderReset/Hardware using ST-LINK in STMicroelectronics STM32?
If you fail to connect on board using ConnectUnderReset/Hardware using ST-LINK with STMicroelectronics Microcontrollers, ensure that NRST of ST-LINK is properly connected to MCU NRST (e.g. check SB12 for Nucleo).
What to do if I fail to see clock signal on MCO output in STMicroelectronics STM32 Microcontrollers?
If you fail to see a clock signal on the MCO output of STMicroelectronics Microcontrollers, ensure that the clock configured to MCO is in the supported range of the GPIO and that the OSPEED setting is correct.
Document applicability to STM32 Arm Cortex MCUs and branding notes.
Lists specific tool versions used for examples in the note.
Glossary of technical terms and abbreviations used in the document.
Overview of ST-LINK probes and debugger interfaces.
Introduction to IDEs, compilers, and ST tools for STM32.
Describes HAL, LL APIs, middleware, and code examples.
Guides to STM32 resources like documentation, wiki, GitHub, and community.
Discusses code optimization impact on debugging and suggests settings.
Explains the role of debugging information and its options in IDEs.
Details SWD pin mapping and usage on STMicroelectronics hardware.
Reviews reset and connection modes for ST-LINK debuggers.
Addresses debug connection loss in low-power modes and DBGMCU register use.
Explains how timers and peripherals behave during breakpoints.
Advises on optimizing SWD frequency for better debugger reactivity.
Covers RDP and PCROP protection features and their debug implications.
Explains default handler behavior and debugging strategies for exceptions.
Shows how to generate custom exception handler templates using STM32CubeMX.
Provides methods to trap division-by-zero errors on Cortex-M.
Describes using STM32 Virtual COM port via ST-LINK for printf.
Explains how to redirect printf output through UART.
Details using Serial Wire Output (SWO) for printf debugging.
Explains the semihosting mechanism for I/O via debugger.
Discusses pin access on ST hardware kits.
Guides on configuring MCO for clock signal output and measurement.
Explains setting DBGMCU registers using HAL and LL functions.
Covers accessing DBGMCU registers through debugger interfaces or scripts.
Lists related application notes for further reading.
General| Series | STM32 |
|---|---|
| Clock Frequency | Up to 480 MHz |
| Architecture | ARM |
| Core | ARM Cortex-M0, ARM Cortex-M0+, ARM Cortex-M3, ARM Cortex-M4, ARM Cortex-M7, ARM Cortex-M33 |
| Program Memory Type | Flash |
| Operating Voltage | 1.62V ~ 3.6V |
| Operating Temperature | -40°C ~ 125°C |
| Peripherals | GPIO, Timers, ADC, DAC, UART, SPI, I2C, USB, Ethernet, CAN, DMA, RTC, CRC, RNG, Cryptography, LCD, SDIO, Quad-SPI, FMC |
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