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Booting Linux in SD card, How to pass the values to the linux program from the FPGA?

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dipin

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Booting linux in sd card::how to pass the values to linux program from fpga

hi,

i wanted to pass the values from a design which is running in fpga.. to hps through Linux loaded on sd card.
right now i am doing it using jtag cable+nios2. but i wanted to do it through linux running on the sd card. i got a helloworld demo program which runs using linux(from an sd card)..
but my problem is how will i pass the values to the c program from the fpga.....how to connect both...
in previously i done it with jtag bridge from qsys(iord and iowr instructions).. but here how can i do it...if anybody got any demo or any tips will be very usefull for me..
i dont have any idea how to do it...any help is really appreciated

thanks and regards
 

Re: Booting linux in sd card::how to pass the values to linux program from fpga

The Cyclone V SOC has dedicated interconnect between the FPGA and HPS.
These are:

1. H2F Bridge
2. F2H Bridge
3. LW Bridge

All of the above are AXI 3 base memory mapped and can be accessed from the OS running on the HPS.

Perhaps you'll find this interesting:
https://www.youtube.com/watch?v=RTmDgNXIwKQ
 
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    dipin

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Re: Booting linux in sd card::how to pass the values to linux program from fpga

hi,
after some reading i think i need H2F bridge to take the data to the pc . but along with the hps what all are components i should use, i am not able to find a reference design .
i got 2 32 bit output register which should i store in a pc. some suggestion are like (other forms) , usage is similar witth nios 2 processor. but with nios 2 , i am using a on chip ram and jtag uart. but with hps shall i need to use both ?
any help is really appreciated :)

thanks and regards
 

Re: Booting linux in sd card::how to pass the values to linux program from fpga

HI,

i had completed the qsys system and sending the bits from fpga to hps using light-weight-hps to fpga bridge. but my problem is how can i access the number
in c code. which is the part of the hps. how will i get the numbers in c code from the bridge. can anybody give some suggestion(. in lightweight bridge and htof axi bridge )

any help will be really appreciated.

thanks and regards
 

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