AM5726: am572x interrupt from PRU

Hello Rasty,

Please check out the following resources:

• SYS/BIOS (TI-RTOS Kernel) User's Guide (Rev. V) Just good to have for TI-RTOS concepts
• https://e2e.ti.com/support/processors-group/processors/f/processors-forum/967080/am5729-pru-interrupt-functionality-design-reasons
• https://software-dl.ti.com/processor-sdk-rtos/esd/AM57X/08_01_00_09/exports/docs/rtos/index_device_drv.html#pruss

For examples, please see the last link which points you to processor_sdk_rtos_am57xx_09_03_00_00/pdk_am57xx_1_0_21/packages/ti/drv/pruss

Under this directory you will find the following example test/am572x/armv7/bios/PRUSS_BasicExample_idkAM572x_wSoCLib_armTestproject.txt

Best,

Josue

Hi

Thank you for reply.

Suggested links ask the same questions like  I'm asking "Where all AM57xx resources gone?" https://e2e.ti.com/support/processors-group/processors/f/processors-forum/967529/faq-where-did-the-pru-icss-wiki-go

I checked all available information and 3 AI engines, no help.

It can be part of Ethercat/Ethernet implementation.

Can you attach an example that shows how to generate event from PRU to A15 core? I need to know how to setup both sides.

Thanks

Rasty

Rasty,

Please read through the RTOS documentation and the example I shared was not mentioned previously as you are suggesting.

Josue Zamitiz-Ayala said:

• https://software-dl.ti.com/processor-sdk-rtos/esd/AM57X/08_01_00_09/exports/docs/rtos/index_device_drv.html#pruss

For examples, please see the last link which points you to processor_sdk_rtos_am57xx_09_03_00_00/pdk_am57xx_1_0_21/packages/ti/drv/pruss

Under this directory you will find the following example test/am572x/armv7/bios/PRUSS_BasicExample_idkAM572x_wSoCLib_armTestproject.txt

https://software-dl.ti.com/processor-sdk-rtos/esd/AM57X/08_01_00_09/exports/docs/rtos/index_overview.html#building-pdk-using-make-in-linux-environment

-Josue

Hi

Document https://www.ti.com/lit/an/sprach5a/sprach5a.pdf mentions PRU_ARMtoPRU_Interrupt and PRU_PRUtoARM_Interrupt projects.

Where are these 2 examples:

PRU_ARMtoPRU_Interrupt and PRU_PRUtoARM_Interrupt ?

Thanks

Rasty

Rasty,

The document points to the PRU Support Package

If you google this you can get to the examples: https://git.ti.com/cgit/pru-software-support-package/pru-software-support-package/tree/examples?id=50b111e4bfb8e8635e3f9238bdf20a31ee9247dd

I must warn you that these examples have not been supported for a long time now. 

See the folowing commit message: https://git.ti.com/cgit/pru-software-support-package/pru-software-support-package/commit/?id=2d6af3cde964c0e94e1e645fad9b2be915d807ff

You are very welcome to review the existing code on older releases. This remains in AS-IS condition.

Best,

Josue

Hi

Thank you very much for link.

This code is for am4xxx. Can I assume that it can be also applied to am57xx ?

I see only PRU side, I do not see ARM side. Is there ARM side?

I'm looking for end-to-end example from mapping of PRU event to some global event (interrupt) through configuration of IRQ multiplexer that maps it to ARM interrupt.

Tyhanks

Rasty

@PratheeshGangadhar

1. Should I carry about IRQ_CROSSBAR configuration or PRUICSS_registerIrqandler does it transparently for me?

2. I see contradictive descriptions/examples of sending event from PRU

a) just write 16+Event to R31 ?

b) need some specific configuration of INTC of PRU, then write to R31 ?

I see parts of puzzle, but not whole picture 

1. PRUICSS_registerIrqHandler(pruIcssHandle,evtOutNum,pruIsrNum,1,1,&Sync0Isr);

2. Board_xbarMpuIrqConfigure(CSL_XBAR_INST_MPU_MAP_PRUSS1_IRQ_HOST3,
CSL_XBAR_PRUSS1_IRQ_HOST3); /* Sync0 ISR */

3. Configuration of INTC at PRU (no source code)

4. writing to _R31 on PRU side to generate event (no source code)

I do not see full picture. Can you clarify? I need end to end example.

Thanks

Rasty

Glad I was able to help!