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Spresense

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  Where do I get started with Spresense development?
  • DanielSand  

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  Getting started with Spresense using Arduino:
  https://developer.sony.com/develop/spresense/developer-tools/get-started-using-arduino-ide/set-up-the-arduino-ide

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  How to install bootloader for the first time?
  • adamfeuer  

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  Hi @adamfeuer

  it would help a lot if you would provide the exact steps you did.
  But one issue that we have seen is that with some USB cables you can't flash at the highest baud rates.

  Have you seen this page: sdk setup

  Br
  Karl

• J

  air conditioner problem
  • John Davis  

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  Hi @John-Davis

  Sorry to hear you having issues with your AC. This forum is actually only for a specific device from Sony called Spresense so it is very unlikely you get any support for it here.

  Best regards,

  Karl

• A

  Spresense Camera Example (Arduino Sketch) High Resolution Capture Does Not Work
  • amendez  

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  Hi @amendez
  Could you please provide the full sketch together with your full error log?

  Thanks,

  BR
  Karl

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  RTC part: Post-counter is 32 bit with 32768 Hz clock, and how to handle the overflow of Post-counter register
  • perryfather  

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  @perryfather

  Thanks for rising this question.

  I started to look into this and can see that the interrupts are being handled by the low level drivers. But I stopped the investigation there for a while to continue on your number 2 question.,

  According to page 170: CXD5602 user manual the RTC has two counters.

  15 bit PreCounter that counts the 32,768Hz clocks, increments every 1/32768 seconds, overflows every second.

  32 bit PostCounter is incremented every second. A 32 bit counter can have a maximum value of 4294967295. To translate this to a human understandable time gives me something in the range of 150 years before it will overflow. 0xFFFF / (3600 x 24 x 7 x 4 x 12) = 147,95 years
  (32 bit max val / (sec/h x h/day x days/week x weeks/month x months/year))

  I know that I didn't answer your question but I doubt that this will be an issue.

  BR
  Karl

  @perryfather said in RTC part: Post-counter is 32 bit with 32768 Hz clock, and how to handle the overflow of Post-counter register:

  .
  Will Spesense generate an interrupt when Post-counter register is overflow every 36.4 hours ? So Spresense will use this IRQ to correct the rtc saving time at ISR of this IRQ ?

• T

  Spresense and Beyond;A Newcomer's Path
  • Tehbondz  

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  Hi @Tehbondz,

  "case 10 bit 4k90fps via 4 lane MIPI CSI-2" , that's pretty massive!
  I can't really get involved in a general question like this too much, but I guess that the electronics forum at stackoverflow might help you.

  Can I ask what you are building that needs this kind of performance?

  BR
  Karl

• A

  Digital Microphones and Arduino
  • atw72  

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  Thanks for following up @TE-KarlKomierowski ! I'll look into the PDM microphones.

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  Capture video from spresense camera board using arduino
  • raghulax  

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  @raghulax you can't open a file on your PC from Spresense by a simple function call.
  You would have to transfer the data from Spresense to PC first.
  This can be done using UART if you don't mind having a wired connection with limited throughput 1MBps or so.
  You could either use a already existing protocol (maybe xmodem?) or write something your self.
  You will have to run something on your PC to initiate and receive the sent data.

  But the short answer is that there is no simple way of just opening a file from Spresense on the PC to store files.

  BR
  /Karl

  @raghulax said in Capture video from spresense camera board using arduino:

  One more question. I found that we can create video from libJPEG. But i'm not sure how to access linux file system from spresense board. How to get handle on linux File system? In the below arduino example code, the bold lines write file to SD card ..... how to write the same to PC instead?

  if (img.isAvailable())
  {
  /* Create file name */

  char filename[16] = {0}; sprintf(filename, "PICT%03d.JPG", take_picture_count); Serial.print("Save taken picture as "); Serial.print(filename); Serial.println(""); /* Remove the old file with the same file name as new created file, * and create new file. */ **theSD.remove(filename); File myFile = theSD.open(filename, FILE_WRITE); myFile.write(img.getImgBuff(), img.getImgSize()); myFile.close();** }

  Sorry if the question is too basic. I'm just learning.

• 

  mkspk and flash_writer for ARM
  • slipperyseal  

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  I'v just attempted to re-install the SDK on my Raspberry Pi (for the sole purpose the running the flasher - full builds still require an Intel system) but it seems it now fails at install-tools stage. which is a shame.

  shasum: openocd-0.10.0-spr1-20191113-linux32.tar.bz2.sha: no properly formatted SHA checksum lines found

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  Is 64bits now required for development in windows?
  • petrokikundi  

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  Hi @petrokikundi

  I have forwarded your question to people with more knowledge about the requirements are in the latest release.

  BR
  Karl

• 

  Future of Spresense and feedback on its design.
  • slipperyseal  

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  Hi @slipperyseal

  Thank you for taking your time and writing this feedback.

  Br
  Karl

• 

  Need BLE driver and application for nRF52832
  • TE-AmitSa  

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  Hi @TE-AmitSa ,

  Unfortunately we can't write any new software on request but only provide support if you decide to write this driver by your self.

  The following link might be helpful for you.

  https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v13.0.0%2Fnrf51_setups_serialization.html

  Br
  Karl

• 

  How to bring up the network in Spresense?
  • vivekbhadra  

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  Hi @Miguel-Ángel-Herranz

  You should have them now, I just sent you an email.

  Please let me know if it didn't work.

  BR
  Karl

• 

  LTE modem support in spresense
  • vivekbhadra  

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  Hi @TE-KarlKomierowski thanks again, didn't notice this until today, will havea look ASAP and get back on this. Thanks again. Cheers, Vivek

• 

  How to do connect a LCD with the SPRESENSE?
  • vivekbhadra  

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  Hi @TE-KarlKomierowski thank for the reply. Yes that's the bit I missed. It's working now.

• M

  Spresense board
  • MARCO  

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  Hi @MARCO ,

  If you have commercial plans/questions of this type I would recommend you to use this form to contact Sony: Purchase Inquiries

  Happy new year.

  BR
  Karl Komierowski

• Q

  How to set player_main as the SDK Application entry point?
  • QiangLi  

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  Q

  @KamilTomaszewski Thank you for this wealth of info.

• A

  Questions about spresense-aruino-compatible
  • ahoudeau  

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  K

  Hello @ahoudeau

  The source code that was used by the prepare_arduino.sh script is version 1.4.2. You can check the git log and see the tag.

  Version 1.0.0 here does not apply to the Spresense Arduino Library version but only to the version of your custom Arduino15.

  You can change this to 1.4.2. Change all occurrences of 1.0.0 to 1.4.2 in the Arduino15 folder.

  It will not change anything in the source code. Everything will be the same. Only the Arduino IDE will see that this is a different package.

  You shouldn't have any problems. Maybe try:

  In the Arduino IDE go to Tools-> Board-> Board Manager... and remove Spresense.

  Go to %userprofile%\AppData\Local\Arduino15 and remove packages and package_spresense_index.json and other files that have spresense in their name.

  Copy packages and package_spresense_index.json from spresense-arduino-compatible/Arduino15 to %userprofile%\AppData\Local\Arduino15

  In the Arduino IDE go to Tools-> Board and select Spresense.

  Do you use automatic updates in the Arduino IDE?

  BR

• 

  Unique ID for device detection.
  • heysadboy  

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  Hi @heysadboy

  Chip has Unique ID. And your application can get it by calling board_uniqueid().
  To call that, you need to include "board.h" on your c source file.

  Please try it.

  BR

• J

  Other image sensors?
  sensors datasheets imx • • JanKok  

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  @TE-KarlKomierowski I joyfully bought the Spresence kit partly because it is open source, open hardware. But I'm disappointed that it is so difficult to get detailed datasheets for Sony image sensors without signing an NDA. I don't want to worry about violating an NDA if I release hardware designs (e.g. an image sensor board) or code (e.g. driver for the image sensor) as open source. And I really don't see what is accomplished by keeping datasheets for released products confidential. Once a product is released, anyone can reverse engineer the pinouts, voltage levels, measure sensitivity, compare with competing products, etc.

  Whoever came up with the idea of the open source open hardware Spresence kit - I applaud them. And I wonder if we can prevail upon them to encourage the image sensor division to make their detailed datasheets for released products easily accessible from the company website? For example, at https://www.sony-semicon.co.jp/e/products/IS/industry/product.html

  I did manage to find ONE detailed, preliminary, non-confidential datasheet, for the IMX290LQR-C, at https://static6.arrow.com/aropdfconversion/c0c7efde6571c768020a72f59b226308b9669e45/sony_imx290lqr-c_datasheet.pdf . That's incredibly helpful, and if I can find someone to sell me a few of those sensors, I'll try to produce a camera board with that sensor that is compatible with the Spresence kit. And make it open hardware so anyone can make them, and maybe sell a few for a reasonable price if anyone wants them. Having an IMX290 camera board available would make it easier for other developers to use that sensor - which would benefit Sony. So there is a reason why datasheets should be made freely available!

  Really, I'd prefer to use the monochrome IMX290LLR, and I'd also like to compare and consider the IMX430LLJ and IMX433LLJ sensors as well. Could I get detailed datasheets for those 3 sensors?