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Altera_Forum's avatar
Altera_Forum
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20 years ago

Problems with EPCS controller

Greetings,

I am using SOPC builder to build a system that contains an EPCS controller.

I am running a bare bones program to talk to the EPCS part natively using

the functions specified in the epcs_commands.c file.

The first function I call is epcs_read_status_register(). This function in

turn calls alt_avalon_spi_command(). My program gets stuck in the

alt_avalon_spi_command() function and does not return.

Specifically here is where it gets stuck:

do

{

status = IORD_ALTERA_AVALON_SPI_STATUS(base);

}

while (((status & ALTERA_AVALON_SPI_STATUS_TRDY_MSK) == 0 || credits == 0) &&

(status & ALTERA_AVALON_SPI_STATUS_RRDY_MSK) == 0);

It never leaves this do/while loop.

If I have an EPCS conrtoller and an EPCS part and am using the correct

base address is there any reason that I would be having this problem?

Any and all information helpful.

Thanks.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    Look to the sources of epcs controller...

    I has the same problem too - i solve it when i find in epcs_controller.v file

    string where i saw the switch - it menas if you set address where bit 8 is 1 - you can access to epcs chip if bit 8 is 0 you can read only boot rom onchip memory.

    If you want to get more details let me know. I can send to you my sources for epcs
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    --- Quote Start ---

    Look to the sources of epcs controller...

    I has the same problem too - i solve it when i find in epcs_controller.v file

    string where i saw the switch - it menas if you set address where bit 8 is 1 - you can access to epcs chip if bit 8 is 0 you can read only boot rom onchip memory.

    If you want to get more details let me know. I can send to you my sources for epcs

    --- Quote End ---

    Hello!

    I have the same problem too. When i use epcs_commands.c ,i found the program stop in do/while loop.

    I scanned the sources of epcs_controller.v(My file name is NIOS_CPU_NIOS_EPCS.v). But I am not know how to modify to solve the problem. Could you help me how to solve this problem?

    Thank you!