@KamilTomaszewski Hi Kamil, I find out that the 16k sample rate not working is indeed my fault. The DSP binary is not correctly put in the SD card. And the example code can also be simply modified to support the 8000 sample rate (A small issue is that the recording time becomes 9.8s, not exactly 10s) Thank you for your kind reminder.

Would you please provide some hints on how can I modify this example to use it for timely calculating the SNR (Signal power to Noise power ratio)?

Thank you in advance for any help.

Best,

Larry

@KamilTomaszewski Thanks you so much !!!

Let me try these.

Best Regards
Jayaprasad T J

Hi @Bhalaji-Kharthik,

It depends on the application. The model, image, application and NuttX must fit into RAM.

Best Regards,
Kamil Tomaszewski

Hi @jayaprasadtj,

You can try to initialize the 2 TFLM Runtime modules.

It would look like this:

ret = tflm_runtime_initialize(&rt1, network1, TFLM_TENSOR_ARENA_SIZE1); ret = tflm_runtime_initialize(&rt2, network2, TFLM_TENSOR_ARENA_SIZE2);

I'm not sure if this will work.

See https://github.com/sonydevworld/spresense/blob/master/examples/tflmrt_lenet/tflmrt_lenet_main.c#L283

Best Regards,
Kamil Tomaszewski

Hi @sskcyber01

From the output you sent, it looks like you haven't implemented the new_yuv_main function.

Hi @karthi,

You may have performed memory operations that overwritten the stack of your task.

Best Regards,
Kamil Tomaszewski

Hi @DogZapper50-1,

Thank you for your feedback.

Building on Windows is slow because it uses MSYS2. For this reason, it is better to use Linux in a virtual machine or another PC with Linux.

If you have time, you can describe in more detail what problems you have encountered in the documentation. This can help us improve the documentation. 🙂

Best Regards,
Kamil Tomaszewski

Hi @karthi,

You will find this in the Makefile of your example.

If you are using IDE:

# Application stack memory size (Default: 2048) STACKSIZE =

To increase the stack size of your application in IDE, you just need to set a value here.

If you are using CLI:

STACKSIZE = $(CONFIG_EXAMPLES_TFLMRT_LENET_STACKSIZE)

To increase the stack size of your application in CLI:

Run make menuconfig Go to Application Configuration -> Spresense SDK -> Examples Find your application and change the stack size Select <Save> and <Exit> Build your app again

Best Regards,
Kamil Tomaszewski

Hi @yokonav,

Here you can find how to send and receive data as I2C master: https://github.com/sonydevworld/spresense/blob/master/examples/hostif/host_i2c_main.c

Alternatively, you can see the Wire library implementation in the Spresense Arduino because it also uses the NuttX: https://github.com/sonydevworld/spresense-arduino-compatible/blob/master/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/Wire/Wire.cpp

Best Regards,
Kamil Tomaszewski

Thanks @KamilTomaszewski, I will check the documentation.

Hi @MatBen-0,

What OS are you using?

@Bhalaji-Kharthik You can get a stack dump after Hard Fault or Assert.

I have just tried the stb library on the IDE and it works for me.

I added this line to the Makefile: STACKSIZE = 8192

My code looks like this:

#include <nuttx/config.h> #include <stdio.h> #include <stdlib.h> #define STB_IMAGE_IMPLEMENTATION #include "stb_image/stb_image.h" #define STB_IMAGE_WRITE_IMPLEMENTATION #include "stb_image/stb_image_write.h" int main(int argc, char *argv[]) { int width, height, channels; unsigned char *img = stbi_load("/mnt/sd0/test.jpg", &width, &height, &channels, 0); if(img == NULL) { printf("Error in loading the image\n"); exit(1); } printf("Loaded image with a width of %dpx, a height of %dpx and %d channels\n", width, height, channels); stbi_write_jpg("/mnt/sd0/test2.jpg", width, height, channels, img, 100); stbi_image_free(img); return 0; }

What is the size of the picture you are trying to read or write?

Hi @MatBen-0,

I think you may have a problem because audio already uses ASMP. Subcore is used for DSP binary.

See step 5 in https://developer.sony.com/develop/spresense/docs/sdk_tutorials_en.html#_build_flash_3

Best Regards,
Kamil Tomaszewski

Hi @NavaneethRao-2,

Did you also modify the subcore code? If so, can you send it?

Best Regards,
Kamil Tomaszewski

Hello!

Would it be possible for you to send us a picture of how your modifications look like?
Also, did you separate the boards during the soldering process?

To test if the problem is on the main board or the extension board, could you separate the boards and test the voltage of the main board in the EXT_VDD pin (pin 3 of connector JP2)? It should be around 3.7V ~ 4V.
Then connect the boards again, without externally powering the ext. board with USB, and check the voltage in that same pin of the main board. Is there a significant drop?

After that, another thing we could check is if the voltage regulator of the extension board is working properly. To do that, test the 3.3V and 5V pin of the JP3 connector on the ext. board. This 3.3V is the line that powers the SD card, so we need to check the voltage there.

@Chandasri-G wrote to me in a private chat. It turned out that the cause of the problem was that there was no AT command firmware on the ESP8266 board.

@KamilTomaszewski thanks! will test it out.

Hi @timothy-malche,

Unfortunately, you can't. Spresense has no MIPI input.

Best Regards,
Kamil Tomaszewski