[STM32WB55] Launch app after FUS/BLE stack update without power cycling

[apous.1]

Hi,

I am working with a STM32WB55 MCU connected using a STLINK probe (SWD).

In the flashing flow, I use STM32_Programmer_CLI to erase the device, put it in FUS mode, update the FUS, update the BLE stack image, and then flash the app image.

One thing I realized was that after those steps, I couldn't start the app image without powering off and on the device. No reset, hardrst, core_rst nor anything I could find in the

STM32_Programmer_CLI --help

command allowed me to launch my app.

Is there any way to launch the app without having to manually power-off and on the board?

Is it quite annoying to have this extra step in the flow!

Kind regards,

A.P.

[Remy ISSALYS]

Hello,

According to UM2237, you can use the start command (see part 3.2.7) which enables execution of the device memory starting from the specified address. 

Best Regards

[apous.1]

Hi Rémy,

Thank you for your answer.

Unfortunately, this doesn't work either!

Here is the output I receive:

$ STM32_Programmer_CLI -c port=swd sn=$MY_SN --start 0x8000000 
 
 -------------------------------------------------------------------
 STM32CubeProgrammer v2.13.0 
 -------------------------------------------------------------------
 
ST-LINK SN : $MY_SN
ST-LINK FW : V3J10M3B5S1
Board : STLINK-V3SET
Voltage : 0.00V
SWD freq : 8000 KHz
Connect mode: Normal
Reset mode : Software reset
Device ID : 0x495
Revision ID : Rev Y
Device name : STM32WB5x/35xx
Flash size : 1 MBytes
Device type : MCU
Device CPU : Cortex-M4
BL Version : 0xD5
Debug in Low Power mode enabled
 
 
RUNNING Program ... 
 Address: : 0x8000000
Application is running, Please Hold on...
Start operation achieved successfully

After this, the device never boots. If I power it off then on, it starts nicely.

The Voltage = 0.00V is not surprising as there is no Vdd cable between the probe and the device.

Kind regards,

A.P.