ARRIA 10 SOC BAREMETAL PROGRAMMING

Question

How to toggle HPS leds in Arria 10 SoC using direct memory access?

Tools I am using: Ubuntu 20.04 in Windows Virtual box, Arm DS 2023, SoC embedded Command Shell

Board: Arria 10 SoC

Additional Info: Installation completed and bootloader is also working perfectly. Also I can able to execute sample files also.

tehjingy_altera · Answer

Hi ItzthiruIs the LED connected to the HPS GPIO or a PIO soft IP?When you connect to the PIO Soft IP you could interface it through the HPS to FPGA bridge.You could use the devmem tool to read the memory address starting from the HPS to FPGA bridge it is connected to , either lightweight or normal.You could get the base address from here: https://www.intel.com/content/www/us/en/programmable/hps/arria-10/hps.htmlAs for the offset you could get it from the Quartus Platform Designer Tool under the Address Map Tab.If you have registered the GPIO in the device tree, you could view the GPIO in the linux /dev directory.RegardsJingyang, Teh

itzthiru · Answer

Hello @JingyangTeh_Altera,

Thank you for prompt response. I am a beginner in this Arria 10 SoC BareMetal Programming. I have completed my installation using this link: SoCEDS and ARM Development Studio | Documentation | RocketBoards.org . Now I would like to move forward with basic sample programs. I got stucked with toggling the HPS LED. Is there any possibility to toggle the LEDs connected to the HPS directly or is there any pre-configurations need to be done before doing this. If so, can you elaborate the steps and procedures to move forward with this? Also share me the latest document for installing software packages and working with BareMetal programming.

Thanks and Regards,

Thiru.

tehjingy_altera · Answer

Hi ThiruYou could refer to this link on understanding more on the baremetal.https://www.intel.com/content/www/us/en/docs/programmable/683211/current/bare-metal-user-guide.htmlAfter understanding the flow, either booting directly to baremetal application or through uboot.I would suggest that you try out the hello world example in the link below.https://www.rocketboards.org/foswiki/Documentation/HWLibLets try out booting a simple application first before interfacing with the hardware.RegardsJingyang, Teh

itzthiru · Answer

Hello @JingyangTeh,

Thank you. I have already completed the previous steps and stuffs that you have mentioned. I was able to run the bootloader and Altera-SoCFPGA-HelloWorld-Baremetal-A10, Altera-SoCFPGA-HardwareLib-Timer-A10 examples using Linux-GCC. Now I want to try doing the LED toggling via direct GPIO access. Help me in this regard....

Thanks and Regards,

Thiru.

tehjingy_altera · Answer

Hi ThiruSorry for the late reply. I was emergency OOO last week,You could refer to more examples for baremetal in the link below.https://www.intel.com/content/www/us/en/support/programmable/support-resources/design-guidance/bare-metal-developer.htmlThere are examples to toggle the GPIO pins.RegardsJingyang, Teh

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ARRIA 10 SOC BAREMETAL PROGRAMMING

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