how to "migrate" from cortexM3 to cortexM4

Question

I have an old project, that run on SAM3S( cortex-m3) , I need to use it as a base for a ew project that should run on Sam4S cortex-M4 . After changing the oopeocd.cfg I get this errors, and I don'T get what do they really mean :

Error: Target not examined yet
in procedure 'halt'

Error: JTAG scan chain interrogation failed: all zeroes
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: at91sam3s4.cpu: IR capture error; saw 0x00 not 0x01
Error: Target not examined yet

can anybody here give a hint where I should look ?

Update

now I get this error :

Error: SAM4 ChipID 0x28ab07e0 not found in table (perhaps you can ID this chip?)
         Version:     0 [0x0000] 
           EPROC:     7 [0x0007] cortex-m4
         NVPSIZE:     7 [0x0007] 128K bytes
        NVPSIZE2:     0 [0x0000] none
        SRAMSIZE:    11 [0x000b] 64K Bytes
            ARCH:   138 [0x008a] ATSAM3S/SAM4S xC Series (100-pin version)
          NVPTYP:     2 [0x0002] embedded flash memory
           EXTID:     0 [0x0000] (exists: NO)
Error: auto_probe fail

any idea what'S the problem now

ed

score 1 · Accepted Answer · answered Jul 30 '15 at 09:23

1

Error: at91sam3s4.cpu: IR capture error; saw 0x00 not 0x01

You would need architecture and BSP files for cortex-M4. Then you can merge your existing project to the BSP of cortex M4.

at91sam3s4.cpu seems like it belongs to cortex M3. So, it will not be there.

However, You would get more answers on atmel website http://www.atmel.com/tools/SAM4S-EK.aspx

answered Jul 30 '15 at 09:23

Ishmeet

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1. thanks for your help, aren't the BSP files saved in at91sam4sXX.cfg file used by openOCD ? – Engine Jul 30 '15 at 09:35
I hope the SAM4S-EK Demo Sources, download link available on the link mentioned in above answer should be the BSP files you need. – Ishmeet Jul 30 '15 at 09:43
Can you please describe what exactly you have done from initial to get this updated error. – Ishmeet Jul 31 '15 at 04:13
it apears that OpenOCD isn'T not supporting this uC I switch to JLink and now it'S working thanks for your help – Engine Jul 31 '15 at 11:18

how to "migrate" from cortexM3 to cortexM4

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