Debug tools

From SeedWiki

Checking the PCIe connection at driver load time

A quick way to verify that the PCIe connection with the board is established is to use the command "lspci" that command will show you that the card is detected:

[sittarpa@freundlabpc4 ~]$ lspci
00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
00:01.0 PCI bridge: Intel Corporation 82945G/GZ/P/PL PCI Express Root Port (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1e.2 Multimedia audio controller: Intel Corporation 82801G (ICH7 Family) AC'97 Audio Controller (rev 01)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) SATA IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
01:00.0 VGA compatible controller: ATI Technologies Inc RV380 [Radeon X600 (PCIE)]
01:00.1 Display controller: ATI Technologies Inc RV380 [Radeon X600]
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5751 Gigabit Ethernet PCI Express (rev 01)
03:00.0 RAM memory: Xilinx Corporation Device 0506
[sittarpa@freundlabpc4 ~]$ 

Using "lspci -v" will give more information about the driver.

 03:00.0 RAM memory: Xilinx Corporation Device 0506
	Subsystem: Xilinx Corporation Device 0506
	Flags: bus master, fast devsel, latency 0
	Memory at f0000000 (64-bit, prefetchable) [size=64K]
	Capabilities: <access denied>
	Kernel driver in use: xc5vsx50t

Using the command "dmesg" after the driver has been loaded into the kernel will give a dump of the contents of the bram memory. This is due to an alteration of the driver file "XC5VSX50T.c". The memory dump looks like this:

fff
Test: 2204ffff
Test: e10cffff
Test: 69f0ffff
Test: 41ecffff
Test: 7d6affff
Test: a28bffff
Test: 4feaffff
Test: 8bd4ffff
Test: 6888ffff
Test: 4b86ffff
Test: 08d5ffff
Test: 2644ffff
Test: 612cffff
Test: ae30ffff
Test: 332effff

Using the driver program to write and read bram memory

Patrick and Sameh added a small snippet of code to the driver so that they can write and read the bram content.