Problem wih the SWD frequency speed in order to flash a BlueNRJ-232 chip.

[Augustin]

Hello all,

I am using in my project a BlueNRG-232 chip in order to have a bluetooth function. I would like to speed UP the flash frequency of my BlueNRG chip. Currently I am limited to 50kHz and it is impossible to go up.

I am using a st link programmer V2 with the flasing software BlueNRJ-1 ST LINK utility.

I have checked all the wires, and they are ok. In addition, with the same connection, I can easily program the stm32 which drives the BlueNRG

Is it a frequent problem ? Has anyone ever encountered this issue ?

Best regards,

[Uwe Bonnes]

Hae a look with the scope at the signals. I expect long wiring and bad grounding your problem. Test if more ground wires help.

[Augustin]

Ok thanks for your advice, I'm going to check that.