hci_reset function returns BLE_STATUS_TIMEOUT with BLUENRG-M2SA in network co-processor mode

RMoc.1 · ‎2023-02-02

I have BLUENRG-M2SA BLE module that I am trying to interface with STM32l496 IC.

I generated the code through STM32CubeMX using X-CUBE-BLE2 v3.3.0 selecting HCL_TL Basic and HCL_TL_INTERFACE UserBoard.

The code gets compiled and when I try to flash and debug, hci_reset function returns BLE_STATUS_TIMEOUT error.

Following are connections

STM32     BLUENRGM2SA
SPI_MISO  DIO2
SPI_MOSI  DIO3
SPI_CLK   DIO0
GPIO_OUT  DIO11 // CS
GPIO_OUT  RESET

I read DT0137 Design tip manual to make the following changes when using BLUENRG-M2SA development board:

HS_SPEED_XTAL=HS_SPEED_XTAL_32MHZ

LS_SOURCE=LS_SOURCE_EXTERNAL_32KHZ

SMPS_INDUCTOR=SMPS_INDUCTOR_10uH

The macros seems to be renamed as following:

HS_SPEED_XTAL=HS_CRYSTAL_32MHZ

LS_SOURCE=LS_SOURCE_32KHZ

SMPS_INDUCTOR=SMSP_10uH

Above changes were made but still it throws the same error.

Do we need to make any additional changes to use BLUENRG-M2SA in a network co-processor mode? I directly opened the packing, soldered on custom board and using it.

What could be the reason for this issue and how to resolve this issue?

Laurent LOUAZON · ‎2023-02-13

Hello,

Please have a look at below thread.

This could give you useful hint.

https://community.st.com/s/question/0D53W00001VYgBSSA1/port-xcubeble2-code-to-bluenrg2m2sa

Regards

Laurent

RMoc.1 · ‎2023-03-16

Thanks @Laurent LOUAZON,

I found out that the chip doesn't have default firmware to act as a network co processor and we need to flash the DTM_SPI_M2SA(or similar) program present in BlueNRG DK folder with RF Flasher Utility. These steps weren't present collectively anywhere and had to spend some time searching them.