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서박사's avatar
서박사
Icon for Occasional Contributor rankOccasional Contributor
4 years ago
Solved

ALTERA function fails after execution at C program

Hello, I'm using DE1-SoC with lubuntu 16.04. I'm trying to make a C program to access the HPS resources such as LED, GPIO, etc. """ I was using the kernel from Terasic, and the C program wi...
  • IntelSupport's avatar
    IntelSupport
    4 years ago

    Hello서박사,

    I’m glad that your problem has been fixed.

    So I will close this thread if no further questions from you.

    Best regards,

    Yoshiaki Saito


서박사's avatar
서박사
Icon for Occasional Contributor rankOccasional Contributor
4 years ago

Hello Yoshiaki,

Thank you again for your suggestion.

I've checked the register at the address 0xffd0501c and at the address FF200000 and got the result as follows:

Booting log

U-Boot 2013.01.01 (Oct 12 2016 - 10:40:34)

CPU : Altera SOCFPGA Platform
BOARD : Altera SOCFPGA Cyclone V Board
I2C: ready
DRAM: 1 GiB
MMC: ALTERA DWMMC: 0
*** Warning - bad CRC, using default environment

In: serial
Out: serial
Err: serial
Skipped ethaddr assignment due to invalid EMAC address in EEPROM
Net: mii0
Warning: failed to set MAC address

Hit any key to stop autoboot: 0
SOCFPGA_CYCLONE5 # md.w FFD05020 2
ffd05020: 0000 0000 ....
SOCFPGA_CYCLONE5 # md.w FF200000 1
ff200000:

(freeze)

As far as I know, if the last 3 bit is low (0), the bridges are enabled.

I've also checked that if FPGA itself is not working properly through operating the FPGA in active-serial mode, but I found that the operation of the FPGA is not the issue.

Please let me know if there is any other method to debug this error.

I appreciate your time and effort. Thank you!

서박사's avatar
서박사
Icon for Occasional Contributor rankOccasional Contributor
4 years ago

For your information,

In addition, md command failure log is different between the following u-boot command:

command

run bridge_enable_handoff;

log

## Starting application at 0x3FF795A4 ...
## Application terminated, rc = 0x0

before the command, md fails as follows:

command

md.b FF200000 1

log

ff200000:data abort

MAYBE you should read doc/README.arm-unaligned-accesses

pc : [<3ff95052>] lr : [<3ff95027>]
sp : 3ff355b0 ip : 0000001c fp : 00000002
r10: ff200000 r9 : ff200000 r8 : 3ff35f60
r7 : 00000000 r6 : 00000001 r5 : 00000001 r4 : 00000001
r3 : ff200000 r2 : c0000000 r1 : 3ff355bc r0 : 00000009
Flags: Nzcv IRQs on FIQs off Mode SVC_32
Resetting CPU ...

resetting ...

U-Boot SPL 2013.01.01 (Oct 12 2016 - 10:38:03)
BOARD : Altera SOCFPGA Cyclone V Board
CLOCK: EOSC1 clock 25000 KHz
CLOCK: EOSC2 clock 25000 KHz

(...reboots automatically)

after the command, md fails as follows:

command

md.b FF200000 1

log

ff200000:

(freezes)

Thank you!