STM32 CAN LOOPBACK Mode || FILTER Configuration

[@ludekurbanic4920]

I think you are not explaining the masking principle correctly. If you set the same value for FilterIdHigh and FilterMaskIdHigh (0x103), then anything with the FilterMaskIdHigh bit set to 0 will pass through the filter, in addition to 0x103. So also 0x303, 0x107, 0x1F3, etc. If only the value from FilterIdHigh is to pass through the filter, all bits must be disabled in FilterMaskIdHigh : sFilterConfig.FilterMaskIdHigh = 0xFFFF

[@ControllersTech]

Yes you are correct. That part seems to be messed up. But I explained how masking works, so if someone wants to build a filter for multiple devices, they should consider that. Thanks for informing about it though... I can't change the video, but I will update the article.

[@dymastro788]

Stm32 with CAN, this is awesome!

[@eduardodelarosaferrer2205]

Wow, I was expecting this!! At last the can bus. Thanks a lot

[@gino.avanzini]

For those interested, on loopback mode it isn't necessary to connect the transceiver and short CANH and CANL. The loopback connection is internal. So you can test the firmware without the hardware

[@isaiahodunze6131]

This is not true for all STM32 MCUs.

[@РоманПлетнев-г3э]

In fact, shorting CANH and CANL would be harmful and should not be done in any case. Even if loopback wasn't handled internally you only should short CAN_RX and CAN_TX pins, not CANH and CANL

[@gino.avanzini]

@@РоманПлетнев-г3э yes, you are correct, the connection should be CAN_TX -> CAN_RX (if not done internally). On the other hand, generally a CAN transceiver will survive a short between CANH and CANL, but of course it's not recommended

[@hoantran4002]

@@РоманПлетнев-г3э Sure? We tested many times and I don't think that's risky.

[@РоманПлетнев-г3э]

@@hoantran4002 while most CAN devices would survive shorting CAN_H and CAN_L it is of course not advisable nor useful. CAN bus works on difference between H and L levels so if you short them out, you not only create stress on transmitters, but you effectively equalize the voltage level on both lines and stop any communication on the bus.

[@alimamdouh6825]

الراجل الهندي اللي علي وضعه❤❤ you are my super hero❤

[@marceloeduardorodriguez1940]

Excellent explanation, very useful to understand CAN protocol, thank you!!

[@luis_ct]

Great video for CAN. Thank you! Would be great to have a video also for FDCAN.

[@goodwill7643]

Thank you. Will wait video with two or three Bluepills, communicating via CAN bus :)

[@ControllersTech]

Next Sunday.. Go through this video also. I am not going to explain everything in that one. Specially the filters..

[@goodwill7643]

@@ControllersTech I'm checking all your videos and making lab tests on my desk.

[@shawntaylor9509]

Great video. Great content. Great explanation as always. Thank you.

[@malleswaritippireddy1081]

If possible need a example of multiple threads in rtos using i2c and spi using isr routines and spinlocks

[@ControllersTech]

I'll look into it.

[@ishakhmouhamadouabdallahy6050]

Great explanation, and very good accent

[@polkijain97]

Great Explanation of Filters, Thanks!

[@madayaswanth1205]

how to receive consecutive 11 recesssive bits on CANRX reply please

[@manhhay4831]

Extremely useful video for me. Thank you so much!

[@manisrinivas_hyd]

Another informative video, thanks a ton

[@PhamDat-d1y]

sorry i have a question, why some (x) bit was send? thank you very much !

[@benjaminmaximov3575]

sometimes the time quantas (prescaler, segment1 and segment2) make the desired baudrate in the CUBEIDE, but it doesnt work because they are too small. Maybe it needs a little more clarification on what those values can be. There is an online calculator that works fine for selecting those values

[@fillempie1501]

Do you have a link to the calculator?

[@ControllersTech]

If the setup doesn't work, Pull the RX pin HIGH using the internal PULL-UP in the cubeMX.

[@vinothkannanr2804]

if you can make one video in registor programming using CAN protocol , it will be awsome

[@madayaswanth1205]

can u make vide on register level

[@3metrosarequipa57]

Congrats!!! very good video!!!

[@lokeshmore1079]

which logic analyser software you used in the above video please give the name with version?

[@surendran1898]

Can you make a Video in CAN protocol Register level program using STM32 Bulepill broad please...

[@rayenbenmahmoud4002]

Very clear explanation, thank you.

[@akashtenkale4559]

explanation was too good

[@hogo750]

if it possible to make a video with stm32+ sim800 +uart +sms control that's a good thing 👌 very thanks for your help 🙏

[@fernando.liozzi.41878]

I use SIM800 using an Arduino pro mini (naneado, with Arduino Nano firmware, for use the watchdod, for real oil industrial applications, thus, I need the watchdow enable, arduino pro mini have a bad bootloader, then does not allow use watchdog, then I load Optiboot 8.0) I use Arduino like drivers for many many many devices (I do not reinvent the wheel or develop my drivers, arduino has a lot of development behind it, and I use that development for my profit. like modbus, neopixel, etc.) Then, I use Arduino to read my PLCs and transmit data from GPRS (2G) to MQTT broker. For strong calculatios, I send data from arduito via I2C or SPI to STM32, dsPIC, etc. (for example quaternion integration from MPU DMP)

[@fernando.liozzi.41878]

I use accelerometers to lift the dynamometric charts on rod pumps, I need accurate data from an accelerometer, as well as vibration calculations, for that, I receive the quaternion from the DMP (digital motion processor) and save myself many times from using Kalman filters to do my own sensory fusion. When I need some LQG, Kalman, PID control, I use matlab and simulink coder to generate ansi C / C ++, for dsPICs or STM32. I use Arduino like driver for the MPU, then transmit the quaternion data to STM32 via I2C and STM32 proccess the data, and another arduino transfer data via SIM800.

[@fernando.liozzi.41878]

I want to earn money, and develop quickly, develop development as quickly and safely as possible. Behind a microcontroller as cheap as the Atmega 328p, there is a community that develops drivers for thousands of devices, values that work and uses Arduino as a driver. As an electronic I am not going to program or develop as well as those thousands of programmers who make extensive libraries for Arduino. Uploading data to AMS or Microsoft Azure, or to any MQTT broker, is already successful with Arduino or ESP8266 or ESP32 at an extremely cheap cost. I challenge you to develop something like this for STM32, noooo, I want to make quick money using IoT, I have everything solved.

[@arjunv4402]

Nice explanation. I have one doubt. I downloaded source codes from description in ur channel. Which language u used to write code is that C language or not ? ...please respond fast

[@ControllersTech]

yes it is c

[@arjunv4402]

@@ControllersTech okay, thank you

[@86davidez]

Thanks for your video. I did it on stm32l4, but when i run the code in debugging mode, i see all zero values on tx amd rx amd the loop is infinite.( i don t use transiver and rx tx pins are open) Could you help me?

[@coderbug404]

how u can analyze data of can bus in logic2, can u guide me to do it in stm32

[@ControllersTech]

You need to Purchase the analyzer hardware.

[@sathishkumarnavarathinam8259]

Hi Can you please help me to establish CAN between two Pyboards?

[@vitorhugo1723]

Why you need to connect the transceiver to stm32 to test loopback mode? By reading the user manual and consulting other sources i realize that dont need to connect the transceiver because the loopback is made internaly to can contoller, can you explain why you connect transceiver to test loopback mode ? I have a problem, i follow this tutorial with my stm32f767zi but didnt work, when debugging the rxfifo0pedingmessage isnt called, can you help me ?

[@alef-assert]

did you find the problem? I'm facing the same as you.

[@maxgertner6870]

@@alef-assert same here. any solution?

[@alef-assert]

@@maxgertner6870 Yes. I don't know why, but I needed to give a delay of 1 ms after sending the message. I did this and it worked to loopback mode.

[@manojmaniyan5003]

You are great sir

[@elmir_rr]

You are the best. Thanks a lot.

[@radman999]

Love your wallpaper

[@sriramchandramouli249]

The Strom Trooper with the Baby Yoda was personal. 💀💀

[@sureshp632]

What type of analyser to use to visualise the data can you tell analyser tool name

[@ControllersTech]

It's the cheapest one you can find anywhere

[@iwayanartayasa38]

This is using stlink sir??

[@prarthikkrishnan8160]

How did you know that the baud rate must be 500,000? is this a preset value for CAN?

[@ControllersTech]

It's a standard. Most devices use 500k. You can choose something else also..

[@bodapatisujatha4181]

This vedio send tx messages to rx message and how to send Rx messages to Tx messages

[@yaakoubinawres1043]

Can i use MCP2515 instead of MCP2551

[@ControllersTech]

Of course not. 2515 is SPI based device. You need another similar transceiver only device like TJA1050.

[@yaakoubinawres1043]

​@@ControllersTechI need to send data from stm32f4 to raspberry pi 4 using CAN bus when i communicate the stm32f4 with mcp2515 and the raspberry pi with the other mcp2515 and of cource the two mcp2515 are connected to each other IS that work ?

[@yaakoubinawres1043]

If that do not work what Can use so ?

[@ControllersTech]

It will work if you do it properly.

[@koggism]

I'm laughing here when he says "not able to receive, I guess some issue with the wire - anyway lets not worry about that". Some issue with the wire he suggests, but hold on we're in loopback mode, tx is connected directly back to rx in the mcu just go look @ 4 minutes into the video

[@Cubom253y]

good job, thanks

[@petah2521]

thank you Sir!

[@tuanfahrzeug]

tks, great video

[@sankaraki]

Great sir

[@pochuanhsing2466]

❤