Setting byte after last one would be enough, no need to memset whole buffer. Just read it until '\0'. This is only one thing that that could be improved that I was able to catch in ControllersTech videos after few years of watching. You are awesome!
Clear, informative, and well-executed Video. Probably, moving the pointer back to point to the beginning of the buffer after the transmission will also solve the problem of having the old data in the receive buffer. Thank you!
It was very useful.. I tried out in my black pill board.. worked amazing.. And speed of transmission is USB_ Full speed ❤️.. Loved it..! Thanks.. Now a big bye bye to Arduino 🤣
@@ControllersTech okk, i want ask question, how to send and recive data from the game sir?? Like ffb, or other sir?? Its must be used API?? Or posible direct input only??
Hey, I use stm32 blackpill with stm32f411ce6u n the problem i face is when the product connected forthe first time via USB c interface it shows up as serial port and after installation on stlink v2 driver it isn't showing or there is no response via USB c n the c port is giving the power and the board turn on
Excellent video, but my WIN 10 is not recognizing the new virtual port. I have installed the official STM drivers, but no success! Did anyone face the same issue
Very helpful tutorial! But i have a question. How do you debug and transmit data in the same time? Did you connect ST-link and USB in the same time to your bluepill?
@@ControllersTech do You have ideas what can be wrong? If I just load project to BluePill, PC recognises com port, but if I going to Debug it, PC can't see any com-port devices
For those who are unable to communicate STM32 development board with serial port Use USB hub/ OTG cable at receiver (laptop) side. It will work flawlessly.
I run the program and when the computer sends "start", the micro sends "Hello World from USB CDC" but when I debug the program, micro and PC can not send anything anymore and Sending stops and when I go to Live Expressions in the Value field is written "Target not available". what is the problem?
Hi! I wanted to thank you first for always replying to my questions. I wonder if we do have to configure the baud rate and others in the hercules utility (logic says that no but I am still confused) Thank you
How fast can you send such data to the PC? So what is the virtual baud rate? I'm using the Teensy 4.0 for a similar function, and there it is operating at full USB 2.0 speed. I wonder if ST32 can achieve the same. The reason why I ask is that I want to output debug code to the PC in time critical code, and anything lower than 2MBaud is slowing down the code too much to operate. Thanks!
great video! for some reason the comport not recognized on my laptop, Unknown USB Device (Device Descriptor Failed). I use NUCLEO-F413ZH. according to it's data sheet configuration (jumper and other connections) all set to use the USB dedicated connector. any idea?
hi PLS HELP When I receive data i got only first char. I mean that when i print my buffRX as a string or even as char (buffRX[0] or buffRX[1]) i got only last char of string that i receive from PC///// PLS HELP
@@ControllersTech I receive just a single char on Windows 11 Putty. It looks like the wrong baudrate setting but the baudrate is not applicable/relevant for a virtual com port. Double checked the clock settings and they are identical. Any suggestion?
1. The video title says f103c8. Although you can use the same idea for other custom boards as well (like blackpill), but not for nucleo and discovery boards. 2. Nucleo and Discovery boards comes with inbuilt ST Link, which can also be used as virtual com port for the UART communication. So you don't really need USB mode for it to communicate directly with the computer. Check the UART series, I have explained it in the first or second video I guess. 3. If you want to use USB mode so badly, you can sill follow the video procedure. But you need to connect the USB to the user USB port, not the ST Link. It is generally avaialble at the bottom of your Discovery/Nucleo boards.
@@ControllersTech Thanks for answering. i wanted to be able to use the usb port on my STM32 DISC because I want to connect it to an instrument and communicate with it. My computer doesn't recongnise the STM32 USB port even the Bluepill USB port. -I checked the cable by connecting my phone and my phone was detected to send and receibve data (so it's not my cable) Best regards
It won’t work with stlink usb. You need to connect another usb port. And why bother with this ? Nucleo boards have uart connected to the stlink. You can simply use uart2 to send and receive data to computer, without using any additional hardware.
Hello, thank you for this video. I have a question. What happens if you restart the PC and the board remains connected? Can you still see the device in device manager? Since mine shows the USB descriptor request failed. If I plug it out and plug it back in again it works fine. But I have to do that every time I restart the PC. Do you have any advice on this? How does your device behave? Thanks!
works perfectly until i press reset button. It stops sending the string (have to unplug and plug the usb) . I don't see any stopping condition in the code . can you explain ?
i am limitted to recevie 64 bytes. after 64 bytes buffer overflows. "*Len" pointer in "static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)" overflows when reaches to 64.
If you are just getting started, i would advise that you get a STLink or get a nucleo or discovery board, they have st link built in. There are methods where you can upload the code to the bluepill without ST link. But you need to reprogram the bootloader for that. You can search about it.. I personally haven't done it yet.
Hello! When I'm enabling embedded USB DMA on CubeMX, windows does not recognize the USB device. If DMA is disable, everithing works well. I'm using NUCLEO H7 board. Do you have any explanation for this issue? Thanks!
i have a doubt....can i transfer and receive file using this USB COM port method...i want to transfer 1KB files from pc to stm32 board, is there any possibility?
Hey, Everything works almost fine. When trying to receive data on my PC, althought the virtual port is detected (COM12) in my case, the serial port wont open when I press "open". Says windows error #5 in docklight. In hercules it says: Serial port COM12 opening error. Any ideas?
(Edit - IT'S WORKNG NOW)... I am using stm32L475 and I cant see options for usb as shown in video. I can see three options USB DEVICE USB HOST USB_OTG_FS ALL WERE GRAY but when I selected there pins, I can enable USB_OTG_FS . I proceed with it, but in my project I can find any usb_cdc_if.c. Even the USB device folder is not generated.
Can u give the full name. I tried it with l475vg and the USB_OTG_FS is not greyed out.. From there you enable the host.. then the USB_HOST option will be available too
Thank you for the video, i have a question I am using stmf407g and I do not have USB and USB_DEVICE access from pinout and configuration. Could you help me ?
You don't write cdc_receive_fs function, it will be called automatically when the data is received by the controller. Len is the number of bytes received. In the video i am using memcpy function inside the cdc_receive to copy the received data into the desired buffer. The length of the "data to copy" using the memcpy function will be the Len parameter, as that's the total data we are receiving.
Well you have to build an application for the computer to do so. You can use uart to receive data from STM and save that data to the file on your computer
Your comment is already somewhat old, but indeed size_t is "size_type", which expands to "long unsigned int". Having said that, the function was dealing with char type, therefore uint8_t.
How do you download the code in the microcontroller? I'm used to Keil Uvision compiler, but now in the CubeIDE I can't find this option. Do you have to always open the debugger to flash the code? Also, to use the debugger "live expression" to see the buffer, you had to connect the USB port and the STlink at the same time?
@@ControllersTech but if you want to send data from Hercules while you are debbuging, as you are doing in the video, you have to connect both St Link and USB cable. My problem is when I connect both, the USB com port "cannot be open". Hasn't it happened to you?
Tried transmitting simple "hello" string, didn't work. Nothing shows up on the monitor. transmitting data using mbed libraries works fine though. Any idea what might be the problem ? Device: STM32F446RE, OS: Ubuntu 20.04
Read the @jacques comment from 1 week before... And what do you mean you can do it using mbed libraries ? Can u share that library.. maybe it could help through the situation
@@ControllersTech oh, so I can't use the same usb port for USB data transfer which is also used STLINK ? I'm able to send and receive data using a single usb cable using mbed.h library (using mbed online compiler). Also while debugging the program (your tutorial), hcdc->Txstate is always zero so CDC_Transmit_FS() always returns usbd_busy. More over, it says can't access memory at some locations for both Tx and Rx buffer.
@@ControllersTech github.com/ARMmbed/mbed-os/blob/master/mbed.h --> mbed online compiler provides mbed library according to the target device selected.
I know what mbed is.. you are just pointing me to "what mbed os is" You mentioned earlier that you can use usb functions to send data to the pc. I am asking the library for those usb functions... If you don't understand this, just check the device manager in your computer and see if the board is recognised as a serial device or a virtual com port..
@@ControllersTech for do that i need to conect the usb-programer, but then, transmission stops working. Computer stops receiving the recurrent message and buffer[] doesnt receive what i send. Do you know what could be wrong? Thanks
Thank you for all your content; It really helps. I m trying to do the same thing but on a Nucleo L053R8. Im following the same steps but it is not working.
Do your board have the USB ? Nucleo boards comes with only 1 USB port by default, and that is used for st link and uart.. You need to attach another USB to your board..
@@ControllersTech Hello Thanks for the reply. I thought I could use the USB with the STLINK (I am still a beginner in STM32 field). Everything works now ! (I had also a problem with my current cable, It could not send data).
Would this work if I have no HSE Crystal fitted? I was using a nucleo which didn't have one fitted it worked for weeks and now doesn't worried it might be the crystal
@@ControllersTech Thanks so much for getting back to me! It's the NUCLEO-F411RE which appears to have a separate place for it? It really makes no sense as to why it did work in the past. To be sure if there is no HSE, the 48MHz can't be generated and so the USB device won't work as expected?
@@ControllersTech I have just used the IO header (CN10) as PA11/PA12 are available at that header. I have then connected the USB D+/D- to those two points. Thanks again
I don't know why are u going through all this trouble when u can simply use the uart2, which is routed through the stlink usb itself, but it's upto you anyway. I don't know why it's not working but i would suggest that you try a different usb once. I am sure it's not the clocks.
@@ControllersTech When I try to use the HSI, I get an error saying "cannot find a solution for some constraints". I am using STM32446RE. Should I maybe buy a different modle to make this work?
1. You can use external crystal for 446RE. It will use the one for the ST link on the top. 2. If using the internal clock, the system clock will be limited to certain frequencies, so you can't use whatever you want in this case. 3. This video won't work with 446RE nucleo, unless you have attached one additional USB port ( you can see it below the empty crystal, "user usb"). The USB that you use to load program is the ST-Link, it's not the user port.
@@ControllersTech You could also use uart in case F103C8 but you did not. Besides I want to do it without uart in similar way as you did but I encontered problems.
No you can't use uart in 103c8, if you do, you need to connect an external hardware to convert the uart data to usb. This was the main reason for the video. The nucleo boards has virtual com port which allows the uart data to display on the serial monitor without the use of an external hardware. Anyway if you insist on using it, you need to connect the usb to the "user usb" port, not the st link. Also make sure that the usb supports data transfer.
hi people! i'm using the same stm32f103c8t6, and i've tested the code as the video and it works, but without the debugger (stlink-v2), anyone knows if there's a problem using usb communication and debugger at the same time? or maybe i could be missing something... from now, thanks
Hi, the video was very informative. But can you guide me to any link or video for linux, as HW is not available in linux. I used putty, for getting the transmitted data. But cant do anythng to send data to the board. I am very new to this,if someone can help me with some tutorial guide / site, it will be very helpful. And also after debugging, running the code in STM32 CubeIDE it also shows an error like this : libusb: error [udev_hotplug_event] ignoring udev action bind Can anyone please help me on the above also. Any small clue will be appreciated.
Setting byte after last one would be enough, no need to memset whole buffer. Just read it until '\0'. This is only one thing that that could be improved that I was able to catch in ControllersTech videos after few years of watching. You are awesome!
Would it be faster than memseting all buffer?
You are a wonderful human being, this is my favorite video on the internet now
Clear, informative, and well-executed Video.
Probably, moving the pointer back to point to the beginning of the buffer after the transmission will also solve the problem of having the old data in the receive buffer.
Thank you!
Thank you sir, your videos on stm32 are very useful in learning it.
It was very useful.. I tried out in my black pill board.. worked amazing.. And speed of transmission is USB_ Full speed ❤️.. Loved it..! Thanks.. Now a big bye bye to Arduino 🤣
Hi. Does it mean that you can send at 480 Mbit/s?
Thank You very much for this video. Your example is working on My side too.
Good video, well explained and straight to the point. Thank you
Hi, on my computer , on debugging, it doesn't transmit because it return USBD_BUSY, does someone have the same problem?
Thank you sir, your videos on stm32 are very useful. Please make a video on bootloader using UART.
How about stm32 usb HID sir? Do u have the video how to send and recive data???
@ControllersTech
Check out stm32 usb Playlist in the description of this video.
@@ControllersTech okk, i want ask question, how to send and recive data from the game sir?? Like ffb, or other sir?? Its must be used API?? Or posible direct input only??
It was a very nice instructional video. Thanks.
Hey, I use stm32 blackpill with stm32f411ce6u n the problem i face is when the product connected forthe first time via USB c interface it shows up as serial port and after installation on stlink v2 driver it isn't showing or there is no response via USB c n the c port is giving the power and the board turn on
Just run this example on the board. The USB C port will be detected when the example is running.
@@ControllersTech not anymore I brun it
I wonder why on the PC (Host) side we are still limited by serial protocols even though the host has full capability for full speed usb.
Excellent video, but my WIN 10 is not recognizing the new virtual port. I have installed the official STM drivers, but no success! Did anyone face the same issue
i think i have the same issue, did you resolved that?
@@panteral6179 I have solved it yet, but I think about using another library than, that from ST electronics. I will try it next weeks
Very helpful tutorial! But i have a question. How do you debug and transmit data in the same time? Did you connect ST-link and USB in the same time to your bluepill?
Yes
@@ControllersTech do You have ideas what can be wrong? If I just load project to BluePill, PC recognises com port, but if I going to Debug it, PC can't see any com-port devices
Very Nice work, Thank You !
For those who are unable to communicate STM32 development board with serial port
Use USB hub/ OTG cable at receiver (laptop) side. It will work flawlessly.
I don't understand why you need memcpy, why don't you use the contents of Buf directly?
Sir, Thank you very much for the useful video :)
I run the program and when the computer sends "start", the micro sends "Hello World from USB CDC" but when I debug the program, micro and PC can not send anything anymore and Sending stops and when I go to Live Expressions in the Value field is written "Target not available". what is the problem?
I ran into the same problem. Do you have any idea now?
did You resolved that issue?@@さい-j8e
did You resolved that issue?
@@panteral6179 the same problem)
Hi! I wanted to thank you first for always replying to my questions. I wonder if we do have to configure the baud rate and others in the hercules utility (logic says that no but I am still confused) Thank you
As much as i tested, it works with all the baud rates. So you can set any baud rate im hecules and it should work
Sir How the data is received outside the While loop. U r not enabling any Interrupt or DMA. How it is possible
I get an error that #includes (usb content) didnt work; any help? Thought libraries should all be imported by now
Thank you, very helpful video.
Thank you very much for useful video!
you are master!!!!!😍
Thanks for the content!
How fast can you send such data to the PC? So what is the virtual baud rate? I'm using the Teensy 4.0 for a similar function, and there it is operating at full USB 2.0 speed. I wonder if ST32 can achieve the same. The reason why I ask is that I want to output debug code to the PC in time critical code, and anything lower than 2MBaud is slowing down the code too much to operate.
Thanks!
Many time try but not worj😢😢😢
Any easy link available?
You gave me a great idea with this video, just one question any language to built a simple custom app and use usb ??
I guess .net
"And now as I connect it, a new serial device gets detected!" It rymes! Happy Christmas
Very good.
Can you show sigma delta ADC for 16-bit measurement?
great video! for some reason the comport not recognized on my laptop, Unknown USB Device (Device Descriptor Failed). I use NUCLEO-F413ZH. according to it's data sheet configuration (jumper and other connections) all set to use the USB dedicated connector. any idea?
hi PLS HELP
When I receive data i got only first char. I mean that when i print my buffRX as a string or even as char (buffRX[0] or buffRX[1]) i got only last char of string that i receive from PC///// PLS HELP
Nice!. The data is transmitted in which format? char or hex? What if I send uint8?
Whatever you want to send You need to send as characters.
@@ControllersTech I receive just a single char on Windows 11 Putty. It looks like the wrong baudrate setting but the baudrate is not applicable/relevant for a virtual com port. Double checked the clock settings and they are identical. Any suggestion?
Great video. What would be the way to use printf over your USB-solution?
Just create some function like print ()
And inside it send the data like we did in the main function
I am using stm32l152c disco board
And after connecting board to pc port no. is not visible.
It doesn't work for ST link USB ports. Connect to another USB port (user USB) if available.
hello,..i am having a "driver error" in the devices for connected usb...can you please tell how to fix it??
thanks sir, is that possible to tell us more about c programming like what you did in this video? it would helps a lot
What c programming ? I merely used 1 function that was available by default. And i explained that too
hello i have followed all the step in the tutorial, but i can't manage to get the data on hercule nothing appear. What can be the issue
Thanks
Probably the usb cable does not support data transfer.
Which board are you using anyway ?
@ControllersTech thanks for answering I am using stm32F407 discovery board,
I will change cable and see if it's working.
@ControllersTech thanks for answering, I am using stm32F407 discovery board.
I've used another cable but it's still not working.
1. The video title says f103c8. Although you can use the same idea for other custom boards as well (like blackpill), but not for nucleo and discovery boards.
2. Nucleo and Discovery boards comes with inbuilt ST Link, which can also be used as virtual com port for the UART communication. So you don't really need USB mode for it to communicate directly with the computer. Check the UART series, I have explained it in the first or second video I guess.
3. If you want to use USB mode so badly, you can sill follow the video procedure. But you need to connect the USB to the user USB port, not the ST Link. It is generally avaialble at the bottom of your Discovery/Nucleo boards.
@@ControllersTech Thanks for answering.
i wanted to be able to use the usb port on my STM32 DISC because I want to connect it to an instrument and communicate with it.
My computer doesn't recongnise the STM32 USB port even the Bluepill USB port.
-I checked the cable by connecting my phone and my phone was detected to send and receibve data (so it's not my cable)
Best regards
On my computer, the notification says USB device is unknown. Does anyone know why?
Hi, I'm using STM32F446RE , i did same procedure i didn't get errors in the program but output is not coming
It won’t work with stlink usb. You need to connect another usb port.
And why bother with this ? Nucleo boards have uart connected to the stlink. You can simply use uart2 to send and receive data to computer, without using any additional hardware.
Hello, thank you for this video. I have a question. What happens if you restart the PC and the board remains connected? Can you still see the device in device manager? Since mine shows the USB descriptor request failed. If I plug it out and plug it back in again it works fine. But I have to do that every time I restart the PC. Do you have any advice on this? How does your device behave? Thanks!
works perfectly until i press reset button. It stops sending the string (have to unplug and plug the usb) . I don't see any stopping condition in the code . can you explain ?
did You resolved that issue?
what board are you using? Did you make your own?
It's bluepill... Like the title says
I followed the same steps. but why on stm32f103c8tx the usb does not working " USB device not Recognized"?
Make sure the usb cable supports data transfer.. some cables are only made for charging
@@ControllersTech Hy i too have the same issue.. Any ideas ..i have done everything what you said....
hello I do not have a "USB" to choose from in my Cube MX. only USART?
What controller is that ?
i am limitted to recevie 64 bytes. after 64 bytes buffer overflows. "*Len" pointer in "static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)" overflows when reaches to 64.
Did you indeed change the C code shown? It has a hard code value of 64 I think.
Hello, I need this tutorial now, but it doesn't work I am using STM32F446RE. Are they some updates or something that change?
You need to solder the user usb on that board.
The default usb you might be using is for the ST Link, and it can't be used as usb host or device.
Sir, if I do the Simple Led blink Program, then how can I check the output? I want to do it without ST link.
If you are just getting started, i would advise that you get a STLink or get a nucleo or discovery board, they have st link built in.
There are methods where you can upload the code to the bluepill without ST link. But you need to reprogram the bootloader for that. You can search about it.. I personally haven't done it yet.
@@ControllersTech OK sir. I will try to find and do the work.
i have done everything but during debug session it says target not available
did You resolved that issue?
Hello! When I'm enabling embedded USB DMA on CubeMX, windows does not recognize the USB device. If DMA is disable, everithing works well. I'm using NUCLEO H7 board. Do you have any explanation for this issue? Thanks!
Yes.. watch the MPU series videos in cortex m7 playlist
Very good video, but I'm having some issues, my buffer only receives the last character sent, and stores it in the first section of the buffer array
i have a doubt....can i transfer and receive file using this USB COM port method...i want to transfer 1KB files from pc to stm32 board, is there any possibility?
Yes you can.
Hey, Everything works almost fine. When trying to receive data on my PC, althought the virtual port is detected (COM12) in my case, the serial port wont open when I press "open". Says windows error #5 in docklight. In hercules it says: Serial port COM12 opening error. Any ideas?
What board ?
(Edit - IT'S WORKNG NOW)...
I am using stm32L475 and I cant see options for usb as shown in video.
I can see three options
USB DEVICE
USB HOST
USB_OTG_FS
ALL WERE GRAY
but when I selected there pins,
I can enable USB_OTG_FS .
I proceed with it, but in my project I can find any usb_cdc_if.c.
Even the USB device folder is not generated.
Can u give the full name. I tried it with l475vg and the USB_OTG_FS is not greyed out..
From there you enable the host.. then the USB_HOST option will be available too
@@ControllersTech I did it today, It was just a matter of different wording, It is working properly now. Thanks for reply
Thank you for the video, i have a question I am using stmf407g and I do not have USB and USB_DEVICE access from pinout and configuration. Could you help me ?
Check your device schematics
Hello I have a question about the Len parameter in the CDC_Receive_FS function. What is it for? and what am i supposed to fill in? can I leave it out?
You don't write cdc_receive_fs function, it will be called automatically when the data is received by the controller.
Len is the number of bytes received. In the video i am using memcpy function inside the cdc_receive to copy the received data into the desired buffer. The length of the "data to copy" using the memcpy function will be the Len parameter, as that's the total data we are receiving.
@@ControllersTech thank you!
My board is not being recognized as COM port. What should I do?
Which board ?
@@ControllersTech Hi. I am using ST32F013C8T6 Blue Pill.
Make sure the usb cable do support the data transfer.. cheaper cables are only build for charging
@@ControllersTech It does support. I am using Windows 10 and the St-link is being recognized but COM port.
You have to run the code. Then connect the USB.. now check the device manager
I couldn't see which COM, my pc shiws it as STM32 ST Link
You need to connect the usb cable
Win10 not recognize device. Any advice?
Run the program first then connect the cable. Also make sure the cable supports data transfer.
Can the data received from the stm32 be saved to a text file continuously until the code has finished running?
Well you have to build an application for the computer to do so. You can use uart to receive data from STM and save that data to the file on your computer
can i do USB send and Receive in the Keil IDE using registers ?
of course you can.. but it's going to be very complicated.
How to modify code if we want to send any sensor data in real time cause there I can't make any pointer
Instead of "hello world", send your data..
Can I make it on h563zi
Very nice! Although Im confused about the conversion to uint8_t to match a size_t. I think size_t is uint32_t or something there about.
Your comment is already somewhat old, but indeed size_t is "size_type", which expands to "long unsigned int". Having said that, the function was dealing with char type, therefore uint8_t.
@@Gabu_ his comment maybe was old, but u answer was helped me understand this problem. thank u much
but if i don't transfer this to uint8_t, can i using it?@@Gabu_
Hello sir, how can I receive 32-bit integers?
I want receive a value like
uint32_t value;
The data can only be transmitted in ascii format. So convert the integer into string, then transfer, then convert back to integer
How do you download the code in the microcontroller? I'm used to Keil Uvision compiler, but now in the CubeIDE I can't find this option. Do you have to always open the debugger to flash the code?
Also, to use the debugger "live expression" to see the buffer, you had to connect the USB port and the STlink at the same time?
To download the code, click the run button
No you don't need to connect usb cable. Just connect st link that's enough.
@@ControllersTech Thank you very much for answering. Your videos had helped me a lot!
@@ControllersTech but if you want to send data from Hercules while you are debbuging, as you are doing in the video, you have to connect both St Link and USB cable. My problem is when I connect both, the USB com port "cannot be open". Hasn't it happened to you?
@@gustavovisentin1987 I have the same problem. It's not working when connect both st-link and usb
Tried transmitting simple "hello" string, didn't work. Nothing shows up on the monitor. transmitting data using mbed libraries works fine though. Any idea what might be the problem ?
Device: STM32F446RE, OS: Ubuntu 20.04
Read the @jacques comment from 1 week before...
And what do you mean you can do it using mbed libraries ? Can u share that library.. maybe it could help through the situation
@@ControllersTech oh, so I can't use the same usb port for USB data transfer which is also used STLINK ? I'm able to send and receive data using a single usb cable using mbed.h library (using mbed online compiler). Also while debugging the program (your tutorial), hcdc->Txstate is always zero so CDC_Transmit_FS() always returns usbd_busy. More over, it says can't access memory at some locations for both Tx and Rx buffer.
Can u send the link of the library you are talking about..
@@ControllersTech github.com/ARMmbed/mbed-os/blob/master/mbed.h --> mbed online compiler provides mbed library according to the target device selected.
I know what mbed is.. you are just pointing me to "what mbed os is"
You mentioned earlier that you can use usb functions to send data to the pc. I am asking the library for those usb functions...
If you don't understand this, just check the device manager in your computer and see if the board is recognised as a serial device or a virtual com port..
Hi, i cant view "buffer" y Expression. What could i do to show it? thanks! Sorry for my English, im Argentian
You have to add it there.
Add it in the live expression
@@ControllersTech for do that i need to conect the usb-programer, but then, transmission stops working. Computer stops receiving the recurrent message and buffer[] doesnt receive what i send. Do you know what could be wrong? Thanks
You saw i did it in the video right..
Just follow what i did
@@cristianaguada8101 same problem here. Have you solved the problem?
@@さい-j8e Hi, yep. I bought a new bluepill. My first STM chip was a fake copy.
thanks very much nice explanation to me(Old electronics/ New VLSI ) engineer
--Ramana Reddy V V
Rtd ISRO
Thank you for all your content; It really helps. I m trying to do the same thing but on a Nucleo L053R8. Im following the same steps but it is not working.
Do your board have the USB ?
Nucleo boards comes with only 1 USB port by default, and that is used for st link and uart..
You need to attach another USB to your board..
@@ControllersTech Hello Thanks for the reply. I thought I could use the USB with the STLINK (I am still a beginner in STM32 field). Everything works now ! (I had also a problem with my current cable, It could not send data).
Would this work if I have no HSE Crystal fitted? I was using a nucleo which didn't have one fitted it worked for weeks and now doesn't worried it might be the crystal
Nucleo have 1 shared crystal between the stlink and the mcu. So i don't think it's the crystal
@@ControllersTech Thanks so much for getting back to me! It's the NUCLEO-F411RE which appears to have a separate place for it? It really makes no sense as to why it did work in the past. To be sure if there is no HSE, the 48MHz can't be generated and so the USB device won't work as expected?
This particular project will never work with nucleo f411. It requires user usb slot and f411 only have stlink usb.
@@ControllersTech I have just used the IO header (CN10) as PA11/PA12 are available at that header. I have then connected the USB D+/D- to those two points. Thanks again
I don't know why are u going through all this trouble when u can simply use the uart2, which is routed through the stlink usb itself, but it's upto you anyway.
I don't know why it's not working but i would suggest that you try a different usb once. I am sure it's not the clocks.
can you please make a video on OTA for STM32
Hi , nice video but I have an issue. I cant debug and use hercules at the same time. Is there anyone knows how to solve?
You need to establish the connection after running the debugger.
@ControllersTech Thank you for your answer. But herculus cant open the serial with the linked com port when it is in debug mode.
Thank you!!!
Are there any STM32 modles that can do this without an extranal resonator?
Yes all of them can work with internal clocks.
During the cubemx setup, instead of using HSE (High speed external) clock, just use HSI (internal).
@@ControllersTech
When I try to use the HSI, I get an error saying "cannot find a solution for some constraints". I am using STM32446RE. Should I maybe buy a different modle to make this work?
1. You can use external crystal for 446RE. It will use the one for the ST link on the top.
2. If using the internal clock, the system clock will be limited to certain frequencies, so you can't use whatever you want in this case.
3. This video won't work with 446RE nucleo, unless you have attached one additional USB port ( you can see it below the empty crystal, "user usb").
The USB that you use to load program is the ST-Link, it's not the user port.
how to download STM32 Virtual COM port driver for Win10. I don't see it in the st.com ( only Win 7-8) :( Help me.
Thanks!
Windows 10 don't need driver
@@ControllersTech thank you.
Thx! ps: USB interrupt must be enabled
How to do it for nucleo F767ZI ???
Why would you want to use it in a nucleo board ? You can simply use the uart2 to communicate with the computer.
@@ControllersTech You could also use uart in case F103C8 but you did not. Besides I want to do it without uart in similar way as you did but I encontered problems.
No you can't use uart in 103c8, if you do, you need to connect an external hardware to convert the uart data to usb. This was the main reason for the video.
The nucleo boards has virtual com port which allows the uart data to display on the serial monitor without the use of an external hardware.
Anyway if you insist on using it, you need to connect the usb to the "user usb" port, not the st link. Also make sure that the usb supports data transfer.
@@ControllersTech USB_DEVICE and USB_HOST in MXCube are disabled. I did not find the information how to enable them.
Hello, thanks a lot it worked for me! Excuse me, how can I pass a simple integer or float stored in a variable, instead of a string?
Convert to string and send..
@@ControllersTech I'm sorry I didn't get it. I have for example int p = 1, how can I convert it to string? Thanks a lot, I'm sorry
Use sprintf. It's very basic c function.. Google it if you don't know what it is..
@@ControllersTech alright I found it and did it, you are very kind sir, thanks a lot you saved me!
Unknowing usb device ... what can be wrong ?
in my case was problem with controller , is all work, after i changed it on other )
Do you upload the code via st link v2 tool ?
Yes
thank you :)
hi people! i'm using the same stm32f103c8t6, and i've tested the code as the video and it works, but without the debugger (stlink-v2), anyone knows if there's a problem using usb communication and debugger at the same time? or maybe i could be missing something... from now, thanks
did You resolved that issue?
Someone met an Error: L6218E?
Tutorial 👍
Link of your background also please 😂❤️
www.wallpapertip.com/wpic/iTibRxi_mandalorian-wallpaper/
thx
Hi, the video was very informative. But can you guide me to any link or video for linux, as HW is not available in linux. I used putty, for getting the transmitted data. But cant do anythng to send data to the board. I am very new to this,if someone can help me with some tutorial guide / site, it will be very helpful.
And also after debugging, running the code in STM32 CubeIDE it also shows an error like this :
libusb: error [udev_hotplug_event] ignoring udev action bind
Can anyone please help me on the above also. Any small clue will be appreciated.
you can use putty to send the data also. If it's not convenient, look for cutecom.
Mandalorian 😄👍🏻👍🏻
Nice work👍👍
best
Really nice 👌 😍💋 💝💖❤️