Arch Linux freezes when SAM-BA uploads applet to the SDRAM

vmario · **Posted:** Thu Feb 25, 2010 10:59 pm

I am writing to ask about my problem with SAM-BA ISP programmer.

I use the evaluation board, which is similar to the AT91SAM9260-EK. I program it using SAM-BA (the latest version - 2.9 RC6, but the problem also occurs in versions 2.8 and 2.7) on Linux. When I am using Xubuntu, everything is OK, but when I run SAM-BA on Arch Linux (32-bit, kernel 2.6.32) it hangs:

Code:

-I- Waiting ...
-I- TCL platform : Linux
-I- SAM-BA CDC 2.9 rc6 on : linux
-I- Retrieved arguments from command line :
-I- argv 0 : /dev/ttyUSB0
-I- argv 1 : AT91SAM9260-EK
-I- argv 2 : MMnet1000_prog.tcl
-I- Connection : /dev/ttyUSB0 (target(comType) = 1)
-I- Board : at91sam9260-ek
-I- Traces Level : 4
-I- target(handle) : file5
Read device Chip ID at 0xfffff240 --- get 0x019803a2
-I- Found processor : at91sam9260 (Chip ID : 0x019803a2)
-I- External RAM Settings :  extRamVdd=1, extRamType=0, extRamDataBusWidth=32, extDDRamModel=0
-I- Loading applet isp-extram-at91sam9260.bin at address 0x200000

If now I'm reseting the processor, I get:

Code:

-E- Error during external RAM initialization.
-E- External RAM access is required to run applets.

The error is probably in a function TCL_Read_Int, because the program hangs on the line 130 in file applets/isp-project/tcl_lib/common/generic.tcl. After removal of this loop, hangs on the next line, which is called TCL_Read_Int function.

Do you know what can cause these problems? I run Ubuntu on a virtual machine on the same computer where I have Arch Linux, so it can not be fault of the hardware.

vmario · **Posted:** Tue Jul 05, 2011 10:31 am

Problem solved, using a device /dev/ttyACM*, created by the driver USB modems (cdc_acm module), instead of /dev/ttyUSB*. /dev/ttyACM* does not hang SAM-BA applets, however, requires additional procedures, because the SAM-BA does not accept the /dev/ttyACM* as a path. You need to create a link that SAM-BA will accept, for example, something of the range /dev/ttyUSB0.../dev/ttyUSB29. For this purpose we add to udev one rule, eg creating a file /etc/udev/rules.d/90-atmel.rules:

SUBSYSTEMS == "usb", attrs {idVendor} == "03eb", attrs {idProduct} ==" 6124 ", SYMLINK + =" ttyUSB29 "

After connecting the ARM dmesg should tell us something like:

[6084.069439] usb 2-1: new full speed USB device using uhci_hcd number 27
[6084.117346] cdc_acm 2-1:1.0: This device can not for calls on its own. It is not a modem.
[6084.117374] cdc_acm 2-1:1.0: ttyACM0: USB ACM device

and the system should create a link:

lrwxrwxrwx 1 root root 7 07-05 10:18 / dev/ttyUSB29 -> ttyACM0

PS. I use SAM-BA in version 2.10 and Arch Linux with kernel 2.6.39.

Arch Linux freezes when SAM-BA uploads applet to the SDRAM

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