Facing issue in read ADC with GPDMA in STM32U585ZIT6Qwith trust zone option enabled

[JShah.7]

Hi;

I am using STM32U585ZIT6Q controller in my current project. I am enabled Trust Zone option.

I have configured ADC 1 (4 channel) in non secure with GPDMA.I am not able to read ADC data. I have attached all configuration. I have used HCLK(160MHz) for ADC.

if i got working example then it will more helpful.

Please help me for same.

[RomainR.]

Hi @JShah.7 (Community Member)

According Datasheet DS13086 Rev 7 the Table 104. 14-bit ADC1 characteristics indicates the max ADC1 frequency is 55MHz. You must increase ADC clock prescaler input.

Check also you enabled internal VDDA switch before using ADC1 with:

HAL_PWREx_EnableVddA();

Let me know if it helps?

Regards,

romain,

[JShah.7]

Hi @RomainR.​ 

Thanks for suggestion. As per your suggestion i use HAL_PWREx_EnableVddA(); function and 16MHz(HSI) clock but still result is same.

[RomainR.]

Is it a custom board?

Are you able to have ADC1 conversion working in these conditions:

• Without TZ enable?
• Without GPDMA transfer?

[JShah.7]

Yes,

I have tested with STM32U575ZIT6Q and it is working in both condition. Also it is working with GPDMA. But if i enable TZ it is not working.

[RomainR.]

In your case, TZ security is active. so, ADC Peripheral, SRAM memory for GPDMA transfer and GPIO are either securable or TrustZone-aware.

In this case you must use Global TrustZone controller (GTZC) to configure your application in secure mode.

Refer to AN5347 - Rev 6 chapter 4 and 11.

[JShah.7]

Hi,

I have configured GTZC but still result is same. Can you please share me example code for ADC with Trustzone enable?

[RomainR.]

Sorry, example your are requesting is actually not available.

But, share your project, I will check your ADC1, GPDMA channel linked-list and GTZC configuration.

regards,

romain,

[JShah.7]

Shared. Please check message.

[ChintaN1]

Hello @RomainR.​ 

Thanks for your support.

Here I have a query regarding supported peripherals for the secure firmware.

Is secure firmware support ADC or not?

Thanks,

Chintan Patel