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#12 ARM Microcontroller Tutorial - USART Receiving

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Purchase my new book: Arm Microcontroller Programming and Circuit Building Volume 1
amzn.to/3LFRaU5
My patreon:
/ newbiehack
How to set the clock speed to 48MHZ:
• #8 ARM Microcontroller...
Introduction to USART:
• #4 ARM Microcontroller...
In this video, I show how to receive a character.
All of the links below help support me at no extra cost to you.
Here are some logic analyzers that I recommend that are affordable:
16 channel Logic Analyzer: amzn.to/3EjzbzC
8 channel Logic Analyzer: amzn.to/3rrnKAv
DreamSourceLab Logic Analyzer: amzn.to/37WR4rG
The Saleae logic analyzer is similar to the one I am using in the video.
Saleae 16 channel logic analyzer: amzn.to/3KRotTi
ARM Kits: newbiehack.com...
Links to the software:
STM32CubeIDE: www.st.com/en/...
STM Studio: www.st.com/en/...
STM32CubeMonitor: www.st.com/en/...
Parts you will need in your prototyping environment:
Kits to get you up to speed quickly:
newbiehack.com...
If you already have the microcontroller, here are some breakout boards to use:
64 pin - amzn.to/3rUXeiq
48 pin and others - amzn.to/3IVkC6D
STM-Link V2 Programmer:
newbiehack.com...
amzn.to/3IIZlgj
Prototyping Breadboards:
newbiehack.com...
amzn.to/3o2Nh1g
Resistor Assortment Kit:
amzn.to/3H4R3ii
Solid core hook-up wire 22 AWG:
amzn.to/3IDGinA
amzn.to/3g5TKUJ
LEDs and Displays:
newbiehack.com...
amzn.to/3Az1zf7
Trimmer potentiometers:
newbiehack.com...
amzn.to/3H6q067
The Dynamixel servo I will be using in the USART videos:
amzn.to/35s3qHl
Microfarad Capacitor Assortment:
amzn.to/32BIX1G
Capacitors on Newbiehack.com:
newbiehack.com...
Electrolytic Capacitor Assortment:
amzn.to/33TtLxt
The cheap oscilloscope that I use (because it's cheap and will work all of the projects in these tutorials): amzn.to/2rSHnBa
A better oscilloscope and the one I would recommend: amzn.to/2qizK5M
The brand of the multimeter that I use and the one I recommend: amzn.to/2qicUez

Опубликовано:

27 авг 2024

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Комментарии : 21

@PatrickHoodDaniel 2 года назад

Hey all, sorry for the wait. I needed to go out of town to fix a machine that was damaged on delivery. Please consider buying the book (link in the description), and getting the microcontrollers from me to support these efforts. I also have a Patreon, link in the description. I have been doing Uber driving to make some extra money so I can keep doing this. Thank you all for watching and I hope you continue. It is truly a pleasure to create these videos for you.

@PatrickHoodDaniel 2 года назад

Please consider making comments. I think the RU-vid gods like that. Tell me what you think of using the same chip as the receiver to test the functionality of the transmit code.

@ZiclopDevices 2 года назад

Excellent tutorials!! Thanks for sharing.

@PatrickHoodDaniel 2 года назад

My pleasure!

@mad1337nes 2 года назад

Good stuff, thank you.

@umargul5644 2 года назад

Well come back, Great 👍 thanks, keep it 💯 updated 💯

@PatrickHoodDaniel 2 года назад

Thanks!!

@halisidrysdale 2 года назад

Enjoyed the series so far - brilliant content :)

@PatrickHoodDaniel 2 года назад

Thank you so much!!

@glewiss6696 2 года назад

Can you use Serial Wire Viewer(SWV/SWO) via printf to Debug STM32 in STM32CubeIDE ?

@PatrickHoodDaniel 2 года назад

Yes, you can do this. I have seen it in other youtube videos, but I have not done it yet.

@Sebastian-69420 4 месяца назад

Hi, so I've got a question. I have a different microcontroller (stm32f401re). This µC only has a USART1_DataRegister to read or write from. Depending on whether you read or write to it, the µC puts the information into a TDR or RDR. But you can't access them specifically by name. So far, so good. My problem is with the while-loop that waits for the RXNE to tell you that it received data. I stepped through the program and found out that the TC-Bit (transmit_complete) is high at some point, prompting the RXNE-Bit to be high as well. This so far all makes sense. Now, before I am able to enter the while loop to wait for a receive, the RXNE-Bit goes LOW again and I am stuck in the loop. This doesn't make a lot of sense to me. Shouldn't the Bit be 1 as long as I received but didn't read from it? And only be 0 again once I read the data. I doesn't seem to work that way for me. Maybe someone here knows the answer :) BTW: I am really glad I found this tutorial series. It is really really good. Very well explained. In fact, your easy to understand explanations convinced me to buy your book. Didn't arrive yet, though. But I think the other half of episode #4 is missing. You started explaining how USART works and you wanted to use it to control a servo but I couldn't find the video where you actually did it :D

@PatrickHoodDaniel 4 месяца назад

Hi Sebastian. Thanks! Are you storing the contents into a variable?

@Sebastian-69420 4 месяца назад

@@PatrickHoodDaniel Yes, I am storing it in myData = USART1->DR Die variable is volatile but I can't read it because I never get there.

@Sebastian-69420 4 месяца назад

@@PatrickHoodDaniel Well it appears to be working now. I don't know what changed. I went away from the computer and came back. Somebody else must have been here and fixed the problem ;) Or I just blinded by looking at this the whole day.

@OrbitalCookie 2 года назад

First step: order the MCU Second step: go have kids and wait for them to grow up Third step: receive the package and resume this tutorial

@PatrickHoodDaniel 2 года назад

Not good to have kids with baby formula supply chain issues. I am experiencing these problems as well, but I am getting better at solving them. Sorry for the wait.

@OrbitalCookie 2 года назад

@@PatrickHoodDaniel Jokes aside, thanks for the tutorial - I am trying to use STM32G0 with RS485 transceiver.

@PatrickHoodDaniel 2 года назад

@@OrbitalCookie awesome. Then this is the tutorial that will help. There are still a few more USART tutorials upcoming that will help in the RS485 realm. Are you more inclined to use register level code, or autogenerated code?

@OrbitalCookie 2 года назад

@@PatrickHoodDaniel I am mostly interested in registry-level, since I have written the simple wrappers myself in rust programming language. But I do sometimes use cube's auto-generation to check how they do it in C.