Problem with OpenOCD and CMSIS-DAP

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RoccoMarco
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Problem with OpenOCD and CMSIS-DAP

Postby RoccoMarco » Mon Feb 22, 2016 10:27 am

Hi,
I am experimenting some issues trying to flash and run a Kinetis demo (RT-FREEDOM-KL25Z).

Well, I am usign CMSIS-DAP so I have created a new entry in external tools: it launches OpenOCD with this arguments:

Code: Select all

-c  "telnet_port 4444"  -s "C:\ChibiStudio\tools\openocd\scripts" -f "interface/cmsis-dap.cfg" -f "${file_prompt}"


Launching it on prompt I have chosen "target\kl25.cfg" I obtained

Code: Select all

Open On-Chip Debugger 0.10.0-dev-00200-gdb56a3b (2016-02-10-18:08)
Licensed under GNU GPL v2
For bug reports, read
   http://openocd.org/doc/doxygen/bugs.html
Info : only one transport option; autoselect 'swd'
Info : add flash_bank kinetis kl25.flash
adapter speed: 1000 kHz
none separate
cortex_m reset_config sysresetreq
Info : CMSIS-DAP: SWD  Supported
Info : CMSIS-DAP: Interface Initialised (SWD)
Info : CMSIS-DAP: FW Version = 1.0
Info : SWCLK/TCK = 0 SWDIO/TMS = 1 TDI = 0 TDO = 0 nTRST = 0 nRESET = 1
Info : CMSIS-DAP: Interface ready
Info : clock speed 1000 kHz
Info : SWD IDCODE 0x0bc11477
Info : kl25.cpu: hardware has 2 breakpoints, 2 watchpoints
Info : MDM: Chip is unsecured. Continuing.


On flash and run I received this error

Code: Select all

symbol-file C:\\ChibiStudio\\chibios161\\demos\\KINETIS\\RT-FREEDOM-KL25Z\\build\\ch.elf
Reading symbols from C:\ChibiStudio\chibios161\demos\KINETIS\RT-FREEDOM-KL25Z\build\ch.elf...done.
set remotetimeout 20
monitor reset init
"monitor" command not supported by this target.
monitor sleep 50
"monitor" command not supported by this target.
load C:\\ChibiStudio\\chibios161\\demos\\KINETIS\\RT-FREEDOM-KL25Z\\build\\ch.elf
You can't do that when your target is `None'
tbreak main
Cannot access memory at address 0x5422
continue
The program is not being run.


Most likely there is something wrong with debug configuration and related commands. Any suggestions?

acr
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Re: Problem with OpenOCD and CMSIS-DAP

Postby acr » Mon Feb 22, 2016 5:35 pm

u run target extended-remote localhost:3333 ?
before symbol-file ?

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Re: Problem with OpenOCD and CMSIS-DAP

Postby RoccoMarco » Mon Feb 22, 2016 5:54 pm

I have solved my problem. Actually the problem is due to non halted target. I have issued an halt editing the configuration file "target\klx.cfg"

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#
# Freescale Kinetis KL series devices
#

source [find target/swj-dp.tcl]

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

# Work-area is a space in RAM used for flash programming
# By default use 4kB
if { [info exists WORKAREASIZE] } {
   set _WORKAREASIZE $WORKAREASIZE
} else {
   set _WORKAREASIZE 0x1000
}

if { [info exists CPUTAPID] } {
    set _CPUTAPID $CPUTAPID
} else {
    set _CPUTAPID 0x0bc11477
}

swj_newdap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID

set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m -chain-position $_CHIPNAME.cpu

# It is important that "kinetis mdm check_security" is called for
# 'examine-end' event and not 'eximine-start'. Calling it in 'examine-start'
# causes "kinetis mdm check_security" to fail the first time openocd
# calls it when it tries to connect after the CPU has been power-cycled.
$_CHIPNAME.cpu configure -event examine-end {
   kinetis mdm check_security
}

$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0

set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME kinetis 0 0 0 0 $_TARGETNAME

# Table 5-1. Clock Summary of KL25 Sub-Family Reference Manual
# specifies up to 1MHz for VLPR mode.
adapter_khz 1000

$_TARGETNAME configure -event gdb-attach {
  halt
}

reset_config srst_nogate

if {![using_hla]} {
   # if srst is not fitted use SYSRESETREQ to
   # perform a soft reset
   cortex_m reset_config sysresetreq
}

$_TARGETNAME configure -event reset-init {
    # Table 5-1. Clock Summary of KL25 Sub-Family Reference Manual
    # specifies up to 24MHz for run mode; Table 17 of Sub-Family Data
    # Sheet rev4 lists 25MHz as the maximum frequency.
    adapter_khz 24000
}


I have configured the event gdb-attach

Code: Select all

$_TARGETNAME configure -event gdb-attach {
  halt
}


Now debugger works correctly.

Anyway I found out another issue!
OpenOCD loses target control right after a the flash and run if optimization are enabled.
This is due to a wrong configuration of the memory section named ".cfmconfig" (flash memory from 0x0000_0400 to 0x0000_0410).

Opening ports/KINETIS/KL2x/hal_lld.c you can see that a configuration is attempted

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/*===========================================================================*/
/* Driver local variables and types.                                         */
/*===========================================================================*/

#ifdef __CC_ARM
__attribute__ ((section(".ARM.__at_0x400")))
#else
__attribute__ ((section(".cfmconfig")))
#endif
const uint8_t _cfm[0x10] = {
  0xFF,  /* NV_BACKKEY3: KEY=0xFF */
  0xFF,  /* NV_BACKKEY2: KEY=0xFF */
  0xFF,  /* NV_BACKKEY1: KEY=0xFF */
  0xFF,  /* NV_BACKKEY0: KEY=0xFF */
  0xFF,  /* NV_BACKKEY7: KEY=0xFF */
  0xFF,  /* NV_BACKKEY6: KEY=0xFF */
  0xFF,  /* NV_BACKKEY5: KEY=0xFF */
  0xFF,  /* NV_BACKKEY4: KEY=0xFF */
  0xFF,  /* NV_FPROT3: PROT=0xFF */
  0xFF,  /* NV_FPROT2: PROT=0xFF */
  0xFF,  /* NV_FPROT1: PROT=0xFF */
  0xFF,  /* NV_FPROT0: PROT=0xFF */
  0x7E,  /* NV_FSEC: KEYEN=1,MEEN=3,FSLACC=3,SEC=2 */
  0xFF,  /* NV_FOPT: ??=1,??=1,FAST_INIT=1,LPBOOT1=1,RESET_PIN_CFG=1,
                      NMI_DIS=1,EZPORT_DIS=1,LPBOOT0=1 */
  0xFF,
  0xFF
};


Anyway without a volatile this is ignored when optimization are enabled. I have solved this problem editing hal_lld.h

Code: Select all

/*===========================================================================*/
/* Driver local variables and types.                                         */
/*===========================================================================*/

#ifdef __CC_ARM
volatile __attribute__ ((section(".ARM.__at_0x400")))
#else
volatile __attribute__ ((section(".cfmconfig")))
#endif
const uint8_t _cfm[0x10] = {
  0xFF,  /* NV_BACKKEY3: KEY=0xFF */
  0xFF,  /* NV_BACKKEY2: KEY=0xFF */
  0xFF,  /* NV_BACKKEY1: KEY=0xFF */
  0xFF,  /* NV_BACKKEY0: KEY=0xFF */
  0xFF,  /* NV_BACKKEY7: KEY=0xFF */
  0xFF,  /* NV_BACKKEY6: KEY=0xFF */
  0xFF,  /* NV_BACKKEY5: KEY=0xFF */
  0xFF,  /* NV_BACKKEY4: KEY=0xFF */
  0xFF,  /* NV_FPROT3: PROT=0xFF */
  0xFF,  /* NV_FPROT2: PROT=0xFF */
  0xFF,  /* NV_FPROT1: PROT=0xFF */
  0xFF,  /* NV_FPROT0: PROT=0xFF */
  0x7E,  /* NV_FSEC: KEYEN=1,MEEN=3,FSLACC=3,SEC=2 */
  0xFF,  /* NV_FOPT: ??=1,??=1,FAST_INIT=1,LPBOOT1=1,RESET_PIN_CFG=1,
                      NMI_DIS=1,EZPORT_DIS=1,LPBOOT0=1 */
  0xFF,
  0xFF
};


Ciao,
RM

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Re: Problem with OpenOCD and CMSIS-DAP

Postby utzig » Mon Feb 22, 2016 8:49 pm

I could reproduce here. Enabling LTO is really removing the section. I'll update the hal_lld's for Kinetis to add volatile that works both with LTO yes/no. Good catch!

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Re: Problem with OpenOCD and CMSIS-DAP

Postby RoccoMarco » Mon Feb 22, 2016 9:25 pm

thanks utzig

flabbergast
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Re: Problem with OpenOCD and CMSIS-DAP

Postby flabbergast » Tue Feb 23, 2016 12:52 am

utzig wrote:I could reproduce here. Enabling LTO is really removing the section. I'll update the hal_lld's for Kinetis to add volatile that works both with LTO yes/no. Good catch!

I reported this last September here: viewtopic.php?f=26&t=2765#p22321 but I guess I drowned it with my other posts ;)
My solution was to add 'used' flag, but 'volatile' should work as well.

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Re: Problem with OpenOCD and CMSIS-DAP

Postby utzig » Tue Feb 23, 2016 1:03 am

flabbergast wrote:I reported this last September here: viewtopic.php?f=26&t=2765#p22321 but I guess I drowned it with my other posts ;)
My solution was to add 'used' flag, but 'volatile' should work as well.


Actually I applied your suggestion to the K20x port. Just forgot to apply it too to KL2x! :P

Fixed now, thanks!

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Re: Problem with OpenOCD and CMSIS-DAP

Postby utzig » Tue Feb 23, 2016 1:08 am

Ops, the change to K20x/hal_lld.c was just local, I forgot to commit at all... done now!


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