topic Re: Re: MDM-AP Status register reading while the PKE02Z64 device held in reset in Kinetis Microcontrollers

MDM-AP Status register reading while the PKE02Z64 device held in reset

guide19 — Tue, 18 Feb 2014 09:36:08 GMT

Hi,

I am wondering if it is normal behaviour when the MDM-AP Status register is not possible to read while the PKE02Z64 device is held in reset.

I get only return value of MDM-AP status 0x00000000. Is this the correct situation?

Writing and reading of the MDM-AP Control is OK while in reset.

After releasing reset, the MDM-AP Status return correct values.

BR,

Jozef

Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

kerryzhou — Thu, 20 Feb 2014 03:37:03 GMT

Hi Jozef Prokopovic,

Thank you for your question in our community! I'd like to serve you!

Actually,MDM-AP status register can be read out when the device is held in reset.

So, I think may be your read method is not right.

If you use jlink debugger, Please do your operation according to the following script on jlink commander:

usb

r0 //system reset

swdwritedp 2, 0x01000000 //select MDM-AP

sleep 10

swdreadap 0

sleep 10

swdreadap 0 // read MDM-AP register 0

sleep 10

swdreadap 1

sleep 10

swdreadap 1 // read MDM-AP register 1

sleep 10

swdwritedp 2, 0x00000000 //select AHB-AP

r1 //system reset release

When you read the register, please read twice, I think you just not read it out .

Wish my answer will help you!

If you still have question, please let me know!

Best regards!

Jingjing

Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

pgo — Thu, 20 Feb 2014 04:32:48 GMT

Hi Josef,

I had a look at this with FRDM-KE02 and FRDM MK20 boards using the USBDM TCL interpreter. I got the following results:

For a FRDM-KE02

% stat
Found 1 devices
USBDM DLL Version = 4.10.6.100
BDM Version = HW=59, SW=4A
USBDM DLL Version = 4.10.6.100
BDM Version = HW=59, SW=4A
:setTarget ARM
:connect
With reset low
:pinSet 0x8
:rCreg r=0x1000000(MDM_AP.Status)->0x00000000
:rCreg r=0x1000004(MDM_AP.Control)->0x00000000
:rCreg r=0x10000FC(MDM_AP.Ident)->0x001C0020
With reset high
:pinSet 0x4
:rCreg r=0x1000000(MDM_AP.Status)->0x0001000A
:rCreg r=0x1000004(MDM_AP.Control)->0x00000000
:rCreg r=0x10000FC(MDM_AP.Ident)->0x001C0020

FRDM-MK20

% stat
Found 1 devices
USBDM DLL Version = 4.10.6.100
BDM Version = HW=59, SW=4A
USBDM DLL Version = 4.10.6.100
BDM Version = HW=59, SW=4A
:setTarget ARM
:connect
With reset low
:pinSet 0x8
:rCreg r=0x1000000(MDM_AP.Status)->0x00000032
:rCreg r=0x1000004(MDM_AP.Control)->0x00000000
:rCreg r=0x10000FC(MDM_AP.Ident)->0x001C0000
With reset high
:pinSet 0x4
:rCreg r=0x1000000(MDM_AP.Status)->0x0001003A
:rCreg r=0x1000004(MDM_AP.Control)->0x00000000
:rCreg r=0x10000FC(MDM_AP.Ident)->0x001C0000
1835008

This was using the following TCL script:

set ::status 0x01000000

set ::control 0x01000004

set ::idreg 0x010000FC

proc stat {} {

openbdm

settarget arm

connect

puts "With reset pin low"

pinSet rst=0

rcreg $::status

rcreg $::control

rcreg $::idreg

puts "With reset pin 3-state"

pinSet rst=3

rcreg $::status

rcreg $::control

rcreg $::idreg

}

This would confirm your conclusion that the mdm-ap-status register reads zero when the device is being held in reset by the reset pin. This is different from the MK20.

bye

Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

guide19 — Thu, 20 Feb 2014 09:52:42 GMT

Hi Jingjing,

I think that the read method is OK at least for MKL devices, where can I read out the MDM-AP status even when the device is held in reset.

BR,

Jozef

Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

guide19 — Thu, 20 Feb 2014 09:54:41 GMT

Hi pgo,

thanks for your asnwer. It looks like the MDM-AP status register of the MKE device is not readable while in reset from some reason.

BR,

Jozef

Re: Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

kerryzhou — Wed, 26 Feb 2014 05:40:47 GMT

Hi Jozef Prokopovic,

I am sorry for my later reply!

Actually,reading the MDM-AP status register of KE is different from other series chip, after communicate with our expert, their advice just like the following:

If Pin reset hold 0, MDM-AP register can’t load from NVM or core in KE family. But you can try to generate system reset by MDM-AP Control register bit3. In this case, it’s ok to read MDM-AP Status register:

Please do the following script on jlink commander:

usb

swdwritedp 2, 0x01000000 //select MDM-AP

sleep 10

swdreadap 0

sleep 10

swdreadap 0

sleep 10

swdreadap 1

sleep 10

swdreadap 1

sleep 10

swdwriteap 1, 0x00000008 //generate system reset;

sleep 100

swdreadap 0

sleep 10

swdreadap 0 //read MDM-AP reg0 in reset =>0x03000052

sleep 10

swdreadap 1

sleep 10

swdreadap 1 //read MDM-AP reg1 =>0x00000008

sleep 10

swdwriteap 1, 0x00000000 //release MDM system reset quest

sleep 100

swdreadap 0

sleep 10

swdreadap 0

sleep 10

swdreadap 1

sleep 10

swdreadap 1

sleep 10

swdwritedp 2, 0x00000000 //select AHB-AP

After do like that, you can read the MDM-AP status register out.

I wish it helps you!

Best regards!

Jingjing

Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

dry — Wed, 20 Dec 2017 04:13:42 GMT

Hello,

Which hw debugger is this the script for?

Is this for MDM-AP or DAP?

Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

kerryzhou — Wed, 20 Dec 2017 07:33:22 GMT

Hi D.RY,

It is using the JLINK debugger.

Best Regards,

Kerry

Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

dry — Wed, 20 Dec 2017 08:00:43 GMT

Segger's Jlink?

Is that script for JLink commander? Sorry just dont' recognize the steps. Also, is that the debug Access Port you accessing?

Re: MDM-AP Status register reading while the PKE02Z64 device held in reset

kerryzhou — Thu, 21 Dec 2017 01:44:11 GMT

Hi D.RY,

Yes, Segger's JLINK, then use the JLINK commander to type the according command, I use the debug to access it.You can try it on your side.

Best Regards,

Kerry