STM32L476G-Discovery demonstration application

[Daniel Martinez Martinez]

Posted on April 26, 2017 at 07:14

Hello,

I am working with the STM32L476G-Discovery board. I am testing the examples applications and I have found an error in the demonstration application regarding to the soundmeter feature.* With the *.bin file provided in the Binary folder the application works normally. I mean, that you can see in the Display how it changes the sound intensity in dB when it is louder or not.

* but, with the IAR source code project, when you program the demonstration application in the STM32L476G-Discovery board, the soundmeter feature doesn't function anymore, it shows a constant value of 120dB in the Display of the board.

I think again, somebody change something in the code and he forgot to test it. Typical, very typical.Please, check this error as soon as possible and provide a change in the software to solve this problem.Regards,

Daniel

[AvaTar]

Posted on April 26, 2017 at 07:40

I think again, somebody change something in the code ...

Not necessarily.

Beside of different startup code and memory layout, varying project settings, like optimization level, can cause such issues - if the code itself is not safe for optimization.

... and he forgot to test it. Typical, very typical.

Fully agree with that.

[waclawek.jan]

Posted on April 26, 2017 at 08:21

Beside of different startup code and memory layout, varying project settings, like optimization level, can cause such issues

+1

Doubly so, as the core of the audio demo code is provided as an IAR-only binary blob ([STM32Cube_FW_L4_V1.5.0]\Projects\STM32L476G-Discovery\Demonstrations\Modules\soundmeter\lib_smr_CM4F_IAR.a).

Release Notes wrote:

Restriction:  SoundMeter and GuitarTuner applications not available pending audio libraries availability for Keil.

readme.txt wrote:

  - Binary file generated with IAR Workbench V7.40 in High optimization mode  

Maybe works as eye catcher, but very useful as an example, if you ask me.

JW

[AvaTar]

Posted on April 26, 2017 at 11:11

For me, the perceived quality of the Cube examples 'rubs off' at the Cube package in general. (Or vice versa).

Sometimes, less is more ...

[Daniel Martinez Martinez]

Posted on May 08, 2017 at 19:37

Not much interest from the people of ST on this subject  :(

[Imen.D · Accepted solution]

Posted on May 09, 2017 at 18:04

Hi

Martinez.Daniel

I already tested successfully the Demo with the same board andI'm not able to reproduce your issue !

The program worked great and I can

see the sound

in dB changed in the Displa

y, I'm using:

• STM32L476G-DISCO board (MB1184C)

• IAR version 7.70

• STM32Cube_FW_L4_V1.7.0

I'm interested to knownif there is a difference with your use case compared to the one I'm testing.

So, could you please precise which IAR and firmware package are you using ?

Thanks

Imen