AWR1642: Getting GPIO interrupt in DSS

JQ Huang

Part Number: AWR1642

Hello,

Do you have a code example of how a GPIO interrupt (e.g. H13) could trigger a callback function in the DSS? Unlike the MSS, the GPIO drivers are not supported in the DSS.

Thank you,

- jq

over 5 years ago

0 Jitendra Gupta over 5 years ago

TI__Guru 69140 points

Hi JQ,

As GPIO is MSS space, so only can have GPIO interrupt not DSS.

On another side, DSS can be notified by MSS over mailbox whenever GPIO interrupt occurs.

Regards,

Jitendra

0 JQ Huang over 5 years ago in reply to Jitendra Gupta

Prodigy 100 points

Hi Jitendra,

Thanks for the quick answer. I see from Page 161 in the technical manual that GPIO interrupt is also sent to DSS_events, and I found that there is a SOC_XWR16XX_DSS_INTC_EVENT_GPIO_0. However, I'm not very clear on how to use that. Do I set up hwi at the SoC level, or is there another cleaner way?

Thanks,

- jq

0 Jitendra Gupta over 5 years ago in reply to JQ Huang

TI__Guru 69140 points

Hi JQ,

Let me check this internally with the team about GPIO+DSS connection and get back to you.

Regards,

Jitendra

0 Jitendra Gupta over 5 years ago in reply to JQ Huang

TI__Guru 69140 points

Hi JQ,

Yes, with these system-interrupts, interrupt from GPIO can be navigated to DSS.

Here is the code snippet which I have added in dss_main.c (mmw demo) to check the GPIO_1 switch (on EVM) press interrupt to DSS.

    HwiP_Params     hwiParams;
    HwiP_Params_init(&hwiParams);
    hwiParams.name = "GPIO_Intr";
    //Change this interrupt no. based on GPIO selection.
    HwiP_create(SOC_XWR16XX_DSS_INTC_EVENT_GPIO_1, GPIO_Int_Handler, &hwiParams);
    HwiP_enableInterrupt (SOC_XWR16XX_DSS_INTC_EVENT_GPIO_1);

But DSS can't access GPIO IP to check its state when it gets any GPIO interrupt.

Regards,

Jitendra

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AWR1642: Getting GPIO interrupt in DSS