Skip to main content
Dhaval Malav
Dhaval Malav
Associate II
January 31, 2018
Question

Bluenrg-MS returns 0x00 in SPI header after sending command

  • January 31, 2018
  • 1 reply
  • 1548 views
Posted on January 31, 2018 at 22:05

I have STM32L4 connected to Bluenrg-MS. I am sending data over to the Bluenrg-MS which sends data to peer device. However, after some successful transfers (not consistent: sometimes after 50 notifies and sometimes after 3000 notifies) Bluenrg-MS starts returning 0x00 as its header after STM32L4 sends any command. 

in STM32L4 we are also implementing CS line de-assertion and assertion after each transaction and hence we believe that should wake up the Bluenrg-MS.

Not sure what is going wrong. Any help or direction will be much appreciated. 

#bluenrg-ms #spi #stm32l4+
This topic has been closed for replies.

1 reply

Antonio Vilei
Antonio Vilei
ST Employee
February 1, 2018
Posted on February 01, 2018 at 17:05

Dear Dhaval Malav,

what firmware version of the BlueNRG-MS chip are you using? Please make sure you are using v7.2c (the latest by the time of this writing).

Are you using the SPBTLE-RF module or is it a custom board?

Also, what software are you running on your STM32L4? As a reference you can use the

http://www.st.com/content/st_com/en/products/embedded-software/mcus-embedded-software/stm32-embedded-software/stm32cube-expansion-packages/x-cube-ble1.html

package.

Best regards,

Antonio

Dhaval Malav
Dhaval MalavAuthor
Associate II
February 1, 2018
Posted on February 01, 2018 at 17:33

Thank you Antonio for your response.

Firmware of BlueNRG-MS - using getBlueNRGVersion I a getting fwVersion to be 0x710 which I believe prior to 7.1a

Custom Board - We are using custom board.

Software on STM32L4 - We developed our own FW however, most of the BLE code is based on X-Cube-BLE and other example codes.

How can I update FW to v7.2c?

Having said so, now knowing the fw version, does the behavior I am seeing makes any sense to you? Where BlueNRG-MS goes to sleep (I suppose from SPI Header) and never come backs.

Thank you,

DM

Winfred LU
Winfred LU
ST Employee
February 2, 2018
Posted on February 02, 2018 at 07:55

Hi DM,

FW v7.2c is available : 

http://www.st.com/content/st_com/en/products/embedded-software/wireless-connectivity-software/stsw-bnrg-v72c.html

Firmware update process can be started in 2 ways:

1. (SW) through an ACI command: aci_updater_start

2. (HW) pull the IRQ pin high during power-up or reset

Please reference

http://www.st.com/resource/en/application_note/dm00116392.pdf

for detail.

Best Regards,

Winfred

Terms & ConditionsAccessibility statement