Questions tagged [mbed]
mbed is an operating system and hardware abstraction layer for microcontrollers, developed by ARM. A large number of development boards are supported.
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Why are GPIO Expander Registers Being Rewritten?
I'm using an LPC1768 microcontroller (mbed) and 4 GPIO expanders (MCP23017). I am trying to write to the expanders to enable the pull up resistors and some other functions, but am getting strange ...
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Arduino Mbed bootloader on nrf52840
I use a PCB that I designed on which is mounted the E73-2G4M08S1C from Ebyte (nrf52840). I flashed the Arduino Mbed bootloader with SWD and a J-Link (J-Flash) probe with no problem.
My computer then ...
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Using CAN bus on a NucleoH743 with Mbed
CAN bus is not working on my project. We are using a Nucleoh743 (STM32h743) programming it with mbed (Mbed OS 6.13)
I have made sure the bus is properly made, with the correct termination resistors, ...
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Why does my ADC -> TIM -> DMA driver work for a bit, then freeze up, then continue working again?
This is difficult to describe, but basically my DMA ADC stream will give me correct readings for lets say 10 seconds, then gets "locked up" / outputs static values that do not change (when ...
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Current calculation dependant on Mbed PWM voltage
I'm looking at this question in a design exercise.
By simple calculation the voltage is 9V, the impedance of the heater is 3ohms. So the current through R is 3A?
OR
Do I need to take into account the ...
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How to recharge a bootstrap capacitor on an H-bridge with each transistor controlled with a pwm GPIO?
I have built an H-bridge using bootstrap. Each MOSFET is controlled by a PWM output of my µc.
Let's say my motor turns clockwise. I set H1 and L2 to a duty cycle α = 0.9, then to recharge H1's cap I ...
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Is there a way to reduce the size of an mbed-os project? [closed]
Every time I create a new mbed-os project, (mbed new ...) I end up with a 1GB folder. This seems a tad bit excessive. How can I reuse the mbed-os folder so that ...
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Steppers will hold position and vibrate when sent xSTP instructions but won't move at all
Edit: setting the Wait time to 0.1 causes it to make music, yay?
I've managed to get the steppers to react to xSTP with this code:
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Help with an Mbed LCP1768 assignment
Could someone help me out and see if my code is correct please and thank you.
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TLC59116 will not drive LEDs
Having the hardest time with this TLC59116 LED Driver IC from Texas Instruments. I have done a crazy amount of debugging and still cannot get it to drive a single LED. I have followed all the ...
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Why would an STM32 not execute its program after upload?
I am attempting to breadboard an STM32F401 using a 64-pin breakout board. I am able to both connect and upload my program successfully (via ST-LINK V2 SWD pins), but once uploaded, the program seizes ...
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Accessing structures concurrently modified by ISR
I have the the following situation: An STM32L476RG (ARM Cortex M4F @ 80MHz, 1MB Flash, 128kB RAM) parses some string data coming in over UART. The project uses mbed-os. The parsing of the data is done ...
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Huge spikes and sudden offset in accelerometer data (FRDM-K64F & ADXL357)
I'm working with vibration analysis on electric motors (AC). I have a mBed FRDM-K64F with a EVAL-ADXL357 connected to it - mounted onto a motor.
The device samples from the FIFO 4000 times per second,...
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Problems with mbed LPC1768 double precision
I have a motion profile generator which calculates a position 1000/sec.
During the decelerating portion of the move, the following calculation is used:
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Mbed Cortex-m hardfault when sending data via TCP
I have a TCPSocket* object which holds a connection to a client. This object is passed to another object to send data back to the client:
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