About AD_716

AD_716 · 2023-10-31

Hello,How long does the __NOP() function last?Is it the time of a cycle? Or 1/F = cycle time?My MCU is an STM32F401RE, and I understand that the maximum frequency is 84 Mhz.So 1/84 Mhz = 11.90 ns, is that the time of a cycle?In my case, if I loop 14 ...

AD_716 · 2023-10-30

Hello,I've been trying to find a solution on the forums for several hours now, to no avail!I have just put my programs on STM32F401, I compile with MBED Studio. I used to light my WS2812 LEDs with a KL25Z (NXP) always using Mbed Studio and my library...

AD_716 · 2023-06-07

Hello everyone,I'm working on STM32F401RE and I'm in the middle of designing a circuit.I have 2 questions:1- Is it possible to use the USB_DP & USB_DM (PA_11 / PA_12) pins in serial TX & RX mode in addition to the USB_DFU mode? I mean, can I physical...

AD_716 · 2023-06-07

Hello everyone,Since can I switched to STM32F401RE. Since impossible to compile with MODSERIAL.I’m compiling on MBED StudioMED OS 5.15.7Here is the errorMODSERIAL_NUCLEO_F401RE.cpp:5:17: error: 'struct serial_t' has no member named 'index' switch( _...

AD_716 · 2023-05-16

Hello everyone, I am new to this community and I am starting to use the STM32F401 from the Nucleo platform. Thank you in advance for your indulgence and your help. So I programmed a test code on nucleo which works well. For my final project, I need ...

AD_716 · 2023-11-02

Hello,Thanks a lot for the feedback!However, I'm still having trouble understanding how this code works?Where is the function to assign a particular pin?Do you have an example in main.cpp if it's not too much to ask... so that it's meaningful?How do ...

AD_716 · 2023-11-01

Thank you, I have already seen and read this tutorial.My problem is that all my code is on Mbed.The WS2812 are about 1/10th of my total program!...That's why I can't use this tutorial!There must be a way to do DMA from another compiler?Why not use Ti...

AD_716 · 2023-11-01

Thanks, I'll give it a try!Sincerely Antoine

AD_716 · 2023-10-31

Good evening,Thanks for your answer,I'm using chips on a custom board already soldered and assembled, I can't change pins because they are all used / assigned. That's why DMA is the only option.I've looked but I can't find a way to do DMA without usi...

AD_716 · 2023-10-31

Good evening,Thank you for your answer,I understand better why my calculations are wrong. Thanks for the tip.I'll take a look at the Debug file, but it's new to me! It's in the BUILD folder of the project?What do you mean by: "Replace the loops with ...

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How long is __NOP()

WS2812 library does not work on STM32F40

Pin assignment BOOT_0 / 1 and USB_DM / DP

Compilation error with MODSEIAL & STM32F401RE

STM32F401 does not seem to boot on custom PCB!

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