Hello Controllers Tech, I don't know if you can see this, but there is one more detail that can be mentioned: CubeIDE sometimes generates the MX_DMA_Init() after the corresponding UART init function. This leads to errors that won't even show up in the handle. The solution to this is reordering the init functions from the code generator app, in Project Manager/Advanced Settings.

Never mind. After hours I realized you have to attach the ttl adapter TX and RX to the RX and TX pins, not the other way around

잘 보았습니다. 감사합니다. I appreciate your tutorial video. Thank you! ^^

wow man, Just wanted to say thank you for this video. really appreciate this.!

Why didn't you configure 'dma circular' on cubemx?

My UART is not receiving, and does not seem to change the data types at all. Any help? My IDE (stm32) does not allow for the viewing of live variables which kinda sucks

Great video. This shows everything I needed.

Sir, I am trying to receive gps data each second using interrupt function.What I understood is that,I had enabled the global interrupt in stm32 configuration for uart3, and whenever the interrupt triggers,the programs goes to the callback function which is hal_uart_rxcpltcallback.The program reaches the function..I do some processing again and then enable the interrupt again..The next sexond when the data arrives at 100ms after a pps signal(reference signal marked for 1 second),again interrupt is triggered , program goes to callback function, does the particular function, comes out of callback function.This happens in every 100th -130th millisecond of each second.I understood that whenever the codes enters the callback, ,the interrupt is diabled and we need to enable the interrupt again to receive the next data..Altogether 300bytes of data arrives from 100 to 130milliseconds..After 130 milisecond,if suppose some random data arrives, the interrupt may still trigger, since each time i enable the interrupt while coming out of callback function..how to stop receing the interrupt after 300millisecond? Can i use abort function?? Also can you please explain What is the differnce between isr function and callback function??Looking forward for your reply.

Awesome! really helpfull. Love the music

Fantastic explanation thanks a lot

small request from me . please post videos on Quectel mc60 modules . because there are not much videos on them . if you have time please give a try.

Thank you for making this video! It is very basic and easy to understand. But I am curious if there is more than the "Half Data" function differnece between IT and DMA. But your video already answered a part of my questions about this topic. Maybe I still have to look into the HAL documentation ... :) On suggestions about your videos: I am no "youtube maker expert" but I have seen videos who used the subtitles for adding text or just made a overlay text hardcoded into the video instead of using the editor. Even if using the editor slowing the "information stream" a lot, it still breaks the flow (sorry if i am not clear with this, i am not a native english speaker). Oh and if there is a way to increase the transparency of the yellow circle around the coursor, it would make the text beyond more visible, which would be great. (maybe it has something to do with video compression here?) Well thanks anyway and keep up the great work :)

Great Video😊 Can you tell me please how can I delete the received data from Rx_buffer and to receive new data from Rx_buffer[0] ?

If the stm32 is the primary cpu, and it controls the booting of a dm368 (in nand boot mode), is it possible to use the uart port on the stm32 to reflash the dm368 nand, or change the bootsel of the dm368 to uart from nand?

I'm using STM32 NUCLEO-F411RE chip... Can you help me write a code to make it capture an image using OV2640 and store it in pc folder?

Thank you very much! I was using POLL recieve and had exact issues as shown, IT or DMA will solve my problem

Can you tell me please how can I delete the received data from Rx_buffer and to receive new data from Rx_buffer[0] ?

Please note for DMA: If using newer version of CubeIDE - code configuration is wrong by default. In main -> change : /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_USART2_UART_Init(); MX_DMA_Init(); /* USER CODE BEGIN 2 */ To: /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_DMA_Init(); MX_USART2_UART_Init(); /* USER CODE BEGIN 2 */ I FOUND THIS INFO IN COMMENT UNDER THIS VIDEO - kzfaq.info/get/bejne/q9h4etensb_HpJ8.html&ab_channel=Weblearning

I got the demo program.Thank you very much.

I have to receive gps string , but the size of it is not fixed . How do I make it possible ?

I did it same . But I receive 1 byte data again.I dont know what can ı do

Awesome video!!! Please make similar for I2C communication. Thank you!

A very useful video thank you!

0:50 Why choose Crystal ceramic resonator as clock source when it doesn't exist on this board? Shouldn't you choose "Bypass clk source"?

Hallo can it works with xbee pro s1 module? thanke you

It was a great video, it helped me so much. I have a question, we are giving size of buffer to fill in the buffer for interrupt receive, but if the length of data which we are receiving is not known then how to receive it? i mean like if we write in API to receive 8 bytes of data and we got only 4 bytes then next time when we receive 4 bytes again then in the previous buffer the data will be written at position 4-7. how to solve this issue? thanks in advance

I did not succeed the led gets to flash more in debug mode does not receive data !!! helps my board and the stm32f767zi

Hello ControllersTech, Thanks a lot for this video, i've got a question: _ |s there a way to make uart_it in none circulare mode i want my data to starts writings from the beginning like the Poll mode? I will be so grateful!

Thank you very much !!

hi! i followed all your instruction but i can't recive data with interrupt. i'm using stm nucelo f411re. is it maybe a matter of soldering/desoldering something? thanks

Excellent.

awesome!, thank you

thanks for the info :)

While using poll method, it does not receive more than 1 byte even though I change timeout to 1000. How can I fix this

Hi ! I am starting with stm32 and I would like to read and write data by UART in interrupt mode with flow control RTS / CTS ... I can transmit but not receive. Please beg to help me! Thank you!

Thank u for the video. What about if I want to use HAL_UART_Receive_IT function and I send 5 or 6 bytes (more than 4)? Zero byte RX[0] will be overwrite with fifth byte. And if I send another 4 byte command program will stock. How can I solve it? Plz Help

great, thank you

Thank you very much

I did exactly what you specified for the POLL method, the timeout is even affecting my LED toggle likr you said, but I'm not receiving any data in the array. Can you think of any reason? Only thing I probably did different is the clock, but the peripheral clock shouldn't matter for UART since it's asynchronous, right?

Does anyone know how an arduino, for example, always receives all the characters correctly, without knowing how many we are going to write in advance?

Thank you! Why do you use usart2, but not usart1?

what about 2 UART is use in the device ???

mantap Pak.

This video is very nice for me. May I have this demo program ?

최신버전으로 업데이트 해주세요.

Thank you so much for the great video. Please tell me how to do this using the register level.

For my usart 1 the corresponding gpio pins I need to configure as usart TX and usart rx or gpio in and gpio out if it's gpio which pin I should configure as in and out? I followed the same steps as ur video still not getting any interrupt kindly help

I using stm32L475 in dev board B-L475E-IOT01A, I did everything as mentioned in video, but I am not able to receive any data from serial terminal. can you plz help

"Notice that data gets written in the buffer in circular mode. Unlike the poll method where it starts from the beginning." at 10:16. This is wrong. I tested it and this is behaving like cicular mode.

Hai , Thanks for the wonderful video. Actually I used UART rx with DMA method...I sent 30 buffer size of data (example: 0123456789abcdefghijklmnopqrst)..after long time transmission, the data were shifted 4 bytes and received in rxcallback loop as (qrst0123456789abcdefghijklmnop)...therefore, after sometime rx data shifting as circular...but I don't want like this...can you please give me a better solution.

@9:14 at RxCallback, can I put strcmp ? or where can I put strcmp in interrupt mode ? thanks

i send but it not receiver although the code is same :>

aychou frer

what version of ide are u using?

How to reset buffer rx?