Unanswered Questions
2,054 questions with no upvoted or accepted answers
27
votes
1
answer
3k
views
Switch from JTAG to SWD with bitbang sequence on STM32F103VB
I am trying to switch from JTAG to SWD without any external devices. Why? Because I would like to use the SWO pin to send a stream of logging information to
another device.
To accomplish this ...
- 10.9k
6
votes
1
answer
6k
views
Run IAR Program without Debugging
I'm having a simple problem with IAR Embedded Workbench, programming an STM32 using an ST-LINK/V2 programmer. I'm trying to run a program that temporarily switches off the JTAG pins, so I can't run it ...
- 1,646
5
votes
0
answers
3k
views
STM32 - I²C Slave HAL Callback ACK
Objective: implement a single byte I²C slave on STM32.
Materials: STM32L452RE Nucleo-64 board, HAL Library, CH341 USB-I²C adapter(1), Artix Linux with Runit, Rhode & Schwarz RTB2004 oscilloscope
...
4
votes
0
answers
302
views
The MOSFET of H-bridge Inverter always explode
I met some difficulties these days.
I use 4 MOSFETs to put on a H-bridge inverter which output power is 1300 W. The dc input of inverter is 310-400 V. The Ids of MOSFET is 80 A and the Vds is 650 V. ...
- 18.1k
4
votes
0
answers
611
views
Nema 17 Stepper Motor Weak Torque (A4988, Arduino)
I'm attempting to run a Nema 17 stepper motor using the common A4988 stepper motor driver. I'm running the motor with a Teensy 4.0, an Arduino-based microcontroller.
The main issue I'm running into is ...
- 587
4
votes
0
answers
128
views
Strange Timing with STM32F401 ADC
I'm observing a strange timing behavior with the ADC of an STM32F401 dev board (Black Pill). I have pin A0 connected to a 10k potentiometer via a 10M resistor (I know the impedance is high, I wanted ...
- 141
4
votes
0
answers
468
views
Determining Component Values for a PCB Antenna
I'm trying to encorporate an ESP32-C3FH4 into my design, and I've reached the point where I need to design the antenna.
I think the AN2051 should be a sufficient antenna component (it's an IOT device, ...
- 445
4
votes
0
answers
237
views
Review of electric circuit with Arduino
I am currently working on a project for which I am in charge of the electronic circuit. Since I have never worked with electronics before, I am really desperate and unsure whether what I am doing is ...
Null♦
- 7,871
4
votes
0
answers
95
views
Multiplexer bandwidth limit (Datasheet decryption) for two external clock on STM32
I would like to have the possibility to select between two main clock on my STM32. Both clock are single ended, 3V3 LVCMOS output. First clock is a 19.2 MHz TCXO, and second clock is a variable clock ...
- 498
4
votes
0
answers
783
views
STM32 Software Interrupt Trigger Any
STM32F746-Disco
Windows 10
STM32CubeIDE 1.8.0
I've just finished writing my first minimal bare metal UART DMA driver (CMSIS only), and both reception and transmission work ok, but then I thought I ...
- 3,783
4
votes
0
answers
468
views
Why won't DS3231 Real Time Clock continue ticking when powered only from VBAT?
I've got a custom STM32 board that uses a DS3231 RTC for date/time stuff. When the board is fully powered I can communicate with the DS3231 over i2c and write and read the time/date. Once the power is ...
- 746
4
votes
0
answers
360
views
Problem with reading data from I2C Temperature Sensor with stm32
Hi I'm pretty to new to embedded programming and unfortunatly I faced a problem when trying to do an excercise with STM32F103RBT6 Nucleo 64 Board and LPS25HB temperature/pressure sensor. I try to read ...
- 10.9k
4
votes
0
answers
352
views
Wait make the STM32L073RZ freeze in stopmode
With my STM32 I'm trying to configure a deepSleep mode and use RTC to generate interruption (actually each 30 seconds).
When my STM start, this one configure the RTC and directly go in Stop mode. ...
- 365
4
votes
0
answers
1k
views
Master-slave timing on ARM Cortex-M0
I have set up a slave timer that starts counting when the master timer is enabled.
I want to know if the slave starts counting when the master timer receives a valid edge (my configuration is count ...
- 1,693
4
votes
0
answers
4k
views
UART reception problem when SysTick Interrupt is enabled
I'm using a STM32F411RE-Nucleo board and generating a project with Cube MX for System Workbench. The problem is that HAL_UART_Receive function doesn't receive input ...
