Using OpenOCD 0.8.0

[Anonymous]

If you have issues using OpenOCD 0.8.0, try these:

   

1. rebind the adapter to the WinUSB driver. See this link for instructions.

   

2. copy the following config into a file called fx3.cfg and put it into the [openocd_install_dir]/scripts/target folder

       

############################################
# Target:    Cypress EZ-USB FX3 ARM926EJ-S #
############################################

   

if { [info exists CHIPNAME] } {
 set _CHIPNAME $CHIPNAME
} else {
 set  _CHIPNAME fx3
}

   

if { [info exists ENDIAN] } {
 set _ENDIAN $ENDIAN
} else {
 set _ENDIAN little
}

   

if { [info exists CPUTAPID] } {
 set _CPUTAPID $CPUTAPID
} else {
 set _CPUTAPID 0x07926069
}

   

# Reset configuration
reset_config trst_and_srst srst_pulls_trst
adapter_nsrst_delay 200
jtag_ntrst_delay 200

   

jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID

   

########################
# Target configuration #
########################

   

set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME arm926ejs -endian $_ENDIAN -chain-position $_TARGETNAME -variant arm926ejs

   

adapter_khz 1000

       

3. run openocd.exe as follows:

   

openocd-x64-0.8.0.exe -f interface/ftdi/olimex-arm-usb-ocd-h.cfg -f target/fx3.cfg

[Anonymous]

Hi,

   

How do you debug threads?

[Anonymous]

 Can you elaborate on what you meant by "debug threads"? What do you want to be debugged in the threads?

[Anonymous]

I mean:

   

1. view list of running threads (gdb: info threads)

   

2. switch between threads and look: what is instruction/function run now, what registers (gdb: thread #/frame #/bt)

   

3. view thread structures and so on.

   

Currently if I stop core SP and PC registers may points to random location and I can see backtrace only for current stack (that pointed by SP).

   

Threads is a ThreadX entity. OpenOCD supports ThreadX but only for Cortex-M3 and Cortex-R4 cores. Tomorrow I will try my patched OpenOCD version with arm926ejs support. May be it will be work 🙂