MPU6050 connected with nrf52840dk : not showing anything on terminal

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

Karl Ylvisaker — Wed, 04 Nov 2020 08:18:38 GMT

[quote userid="86529" url="~/f/nordic-q-a/67209/mpu6050-connected-with-nrf52840dk-not-showing-anything-on-terminal/278330#278330"]Thank you Karl for helping me!!![/quote]

No problem at all, saver! I am happy to help! :)

Please do not hesitate to open a new ticket if you should encounter any issues or questions in the future.

Good luck with your development!

Best regards,
Karl

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

saver — Tue, 03 Nov 2020 18:38:55 GMT

Thank you Karl for helping me!!!

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

Karl Ylvisaker — Fri, 30 Oct 2020 09:06:34 GMT

[quote user="saver"]Thanks, now it is showing the gyro meter values, very much Thank you!!![/quote]

Fantastic! I am glad we were able to identify and resolve the issue.

[quote user="saver"]I don't understand what you mean by this, can you please elaborate.[/quote]

The logger module comes with a great feature called "deferred logging", you can read about this in its entirety in the logger documentation, but in essence, it allows you to defer logger processing until it is suitable for the application.
Sometimes, you might want to write logs during timing-critical operations, adding a bunch of logging may then cause trouble for your timing sequences, and otherwise mess with your application. You may then instead use deferred logging, which lets you control when the processing ( and output ) of the log will take place.

If you take a look through the examples, the NRF_LOG_PROCESS function is often called as a part of the idle_state_handler, i.e when the CPU has nothing more important to do, it can process its logs and go to sleep. This is a great way to use deferred logging, since it will minimize the logging effect on your application.

Does this make the deferred logging option more clear? Please do not hesitate to ask, if anything still should be unclear.

[quote user="saver"]yes, but can you also tell me how to calibrate the sensor.[/quote]

Do you have the sensors datasheet? I am not familiar with the particular sensor you are working with, but I assume there should be a section in its datasheet regarding how to initiate and complete calibration.
Please try to find this section, and let me know if there is anything in particular there that you would like me to take a look at. Please also bear in mind that since the sensor is not a Nordic product, you might have to take any issues up with its manufacturer directly.

Best regards,
Karl

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

saver — Fri, 30 Oct 2020 05:03:09 GMT

[quote userid="87869" url="~/f/nordic-q-a/67209/mpu6050-connected-with-nrf52840dk-not-showing-anything-on-terminal/277394#277394"]Could you try to define NRF_LOG_DEFERRED to 0, and see if you then see the logger output in your putty terminal?[/quote]

Thanks, now it is showing the gyro meter values, very much Thank you!!!

[quote userid="87869" url="~/f/nordic-q-a/67209/mpu6050-connected-with-nrf52840dk-not-showing-anything-on-terminal/277394#277394"]Alternatively, you should call NRF_LOG_PROCESS at some point in your main loop.[/quote]

I don't understand what you mean by this, can you please elaborate.

[quote userid="87869" url="~/f/nordic-q-a/67209/mpu6050-connected-with-nrf52840dk-not-showing-anything-on-terminal/277394#277394"]Let me know if this resolves your issue,[/quote]

yes, but can you also tell me how to calibrate the sensor.

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

Karl Ylvisaker — Wed, 28 Oct 2020 13:05:39 GMT

[quote user="saver"]

the sdk file

https://drive.google.com/drive/folders/1jlCYiiSo4Ez7Fjs5j_bELG4sxPdK5bZf?usp=sharing

the above link takes you to twi_mpu6050 folder pca10056--> ses file

[/quote][quote user="saver"]i put the same main.c file and followed all the instructions told in the video, there was no sdk file in the description of the video only main.c , mpu6050.c, mpu6050.h file.[/quote]

I see now that you are using the twi_scanner example as a base for your application. The example uses deferred logging, which means that you will need to call NRF_LOG_PROCESS() at some point, to have the logs be processed.
Could you try to define NRF_LOG_DEFERRED to 0, and see if you then see the logger output in your putty terminal?
Alternatively, you should call NRF_LOG_PROCESS at some point in your main loop.

Let me know if this resolves your issue,

Best regards,
Karl

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

saver — Tue, 27 Oct 2020 13:05:42 GMT

[quote userid="87869" url="~/f/nordic-q-a/67209/mpu6050-connected-with-nrf52840dk-not-showing-anything-on-terminal/276862#276862"]Great. Could you share your sdk_config file, so I may take a look? I just want to rule out the possibility that we are overlooking a define here.[/quote]

the sdk file

https://drive.google.com/drive/folders/1jlCYiiSo4Ez7Fjs5j_bELG4sxPdK5bZf?usp=sharing

the above link takes you to twi_mpu6050 folder pca10056--> ses file

[quote userid="87869" url="~/f/nordic-q-a/67209/mpu6050-connected-with-nrf52840dk-not-showing-anything-on-terminal/276862#276862"]Did you do as I suggested, and take a look at the code supplied with the tutorial you are following? The tutorial's author has included the source code in the video description, you should take a look at the authors sdk_config file, to see how it is different to your own.[/quote]

i put the same main.c file and followed all the instructions told in the video, there was no sdk file in the description of the video only main.c , mpu6050.c, mpu6050.h file.

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

Karl Ylvisaker — Mon, 26 Oct 2020 12:54:55 GMT

Hello,

Sorry for my late reply.

[quote user="saver"]i have done what you have said above.[/quote]

Great. Could you share your sdk_config file, so I may take a look? I just want to rule out the possibility that we are overlooking a define here.

[quote user="saver"]i have made the changes, but nothing is shown in putty terminal.[/quote]

Did you do as I suggested, and take a look at the code supplied with the tutorial you are following? The tutorial's author has included the source code in the video description, you should take a look at the authors sdk_config file, to see how it is different to your own.

Looking forward to resolving this issue together!

Best regards,
Karl

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

saver — Fri, 23 Oct 2020 14:20:05 GMT

[quote userid="87869" url="~/f/nordic-q-a/67209/mpu6050-connected-with-nrf52840dk-not-showing-anything-on-terminal/276344#276344"]Set RTT_BACKEND back to 0, and UART_BACKEND back to 1.
Make sure NRF_LOG_ENABLED is defined to 1 also.[/quote]

i have done what you have said above.

[quote userid="87869" url="~/f/nordic-q-a/67209/mpu6050-connected-with-nrf52840dk-not-showing-anything-on-terminal/276344#276344"]Make these changes, and let me know if you are seeing anything in your putty terminal following this.[/quote]

i have made the changes, but nothing is shown in putty terminal.

i have only changed the pin numbers to 27 and 26 from 22,23 from the mpu6050.h, from the files in the video.

//I2C Pins Settings, you change them to any other pins
#define TWI_SCL_M 27 //I2C SCL Pin
#define TWI_SDA_M 26 //I2C SDA Pin

///////////////////////////////////////////////////////////////////////////

putty terminal is just showing a blank screen,

can you suggest me some solution

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

Karl Ylvisaker — Thu, 22 Oct 2020 07:17:11 GMT

[quote user="saver"]i want to display the gyro values in the the putty terminal.[/quote][quote user="saver"]i need to see the gyro values in the putty terminal for my project.[/quote]

As I said, the putty terminal does not support RTT. In the youtube tutorial you linked, he used the loggers UART backend to display the values on the putty terminal.
My understanding was that you wanted to use RTT, but if you would like to user UART backend instead, please change the defines in your sdk_config to reflect this. Set RTT_BACKEND back to 0, and UART_BACKEND back to 1.
Make sure NRF_LOG_ENABLED is defined to 1 also.

Make these changes, and let me know if you are seeing anything in your putty terminal following this.

Best regards,
Karl

P.S The complete code for the tutorial you referenced is available in the video description - you should take a look there, and see how you sdk_config file is different from the one provided with the project. I think this will give you some clarity as to why it did not work as intended right away.

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

saver — Wed, 21 Oct 2020 17:42:17 GMT

i want to display the gyro values in the the putty terminal.

i have enabled the log at sdk_config file

Actually i have referred to this video to do take the values from mpu6050 , but nothing is displaying on the putty terminal, i have done everything as described in the video, any idea why it is not displaying in the putty terminal, in the below video ,he has taken for pca10040 and i have done the program in pca10056

https://www.youtube.com/watch?v=fH59DQQNOjU&t=5s

///////////////////////////////////////////////////////////////////////////////////////////////////////

when i try to debug, then the nrf_log_info command is not displaying any reading in the debug terminal too

///////////////////////////////////////////////////////////////////////////////////////////////////////

actually i need to see the gyro values in the putty terminal for my project.

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

Karl Ylvisaker — Tue, 20 Oct 2020 09:28:19 GMT

Hello,

[quote user="saver"]Sorry for the late reply[/quote]

No problem at all.

[quote user="saver"]i think based on the code it is uart, then i have enabled RTT and also NRF_FPRINTF_FLAG_AUTOMATIC_CR_ON_LF_ENABLED , i am not using defferred logger .[/quote]

I am not sure I understand what you meant by this. You were using UART backend, but now you have disabled it and instead enabled RTT backend - also remembering to set *_CR_ON_LF_ENABLED to 0?

[quote user="saver"] I.e "Logger initialized", or similar. [/quote]

Please elaborate what you mean by this.

[quote user="saver"]i have added this but nothing is showing on the putty or terminal( DEBUG AND TERMINAL EMULATOR)[/quote]

What is your LOG level configured to?
As far as I know putty does not support RTT logging. You will need to either use Segger Embedded Studio's Debug Terminal, or the standalone RTT Viewer application for desktop, provided by Segger.
Could you verify for me that you are using either of these two application when you say that you are not seeing anything outputted to your terminal?

Best regards,
Karl

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

saver — Tue, 20 Oct 2020 03:08:49 GMT

Sorry for the late reply

i think based on the code it is uart, then i have enabled RTT and also NRF_FPRINTF_FLAG_AUTOMATIC_CR_ON_LF_ENABLED , i am not using defferred logger .

I.e "Logger initialized", or similar.

i have added this but nothing is showing on the putty or terminal( DEBUG AND TERMINAL EMULATOR)

RE: MPU6050 connected with nrf52840dk : not showing anything on terminal

Karl Ylvisaker — Thu, 15 Oct 2020 13:36:28 GMT

Hello,

[quote user=""]

i also tried in putty, but nothing is showing in the terminal

any answers, without hesitation ask any question.

[/quote]

Which backend are you using for your logger module, UART or RTT?
The Segger Embedded Studio's Debug Terminal ( not the terminal emulator ), uses RTT - and you will therefore need to configure your logger to use RTT if you want anything to show on this terminal.
Additionally, you will need to make sure that NRF_FPRINTF_FLAG_AUTOMATIC_CR_ON_LF_ENABLED is defined to 0.
Could you also verify for me whether you are using deferred logging or not?

You are including a lot of code regarding your SPI, while the problem seems to be related to displaying logger outputs.
To verify that your logger problems are resolved, please add a logger output immediately following the successful initialization of the logger module. I.e "Logger initialized", or similar.

Looking forward to resolving this issue together!

Best regards,
Karl