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SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world.
And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download two short videos (registration required) highlighting:

System Workbench for STM32


Error: jtag status contains invalid mode value - communication failure

Hi,

Here is an issue,

//*********************LOG //*************************
Open On-Chip Debugger 0.10.0+dev-00021-g524e8c8 (2019-04-12-08:48)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
srst_only separate srst_nogate srst_open_drain connect_assert_srst
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 8000 kHz
adapter_nsrst_delay: 100
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : clock speed 8000 kHz
Info : STLINK v2 JTAG v34 API v2 SWIM v7 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 3.150195
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
Info : Stlink adapter speed set to 4000 kHz
Info : STM32F103C8Tx.cpu: hardware has 6 breakpoints, 4 watchpoints
Info : Listening on port 3333 for gdb connections
Info : accepting ‘gdb’ connection on tcp/3333
target halted due to debug-request, current mode: Thread
xPSR: 0x61000000 pc: 0x2000002e msp: 0x20005000
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
Info : Stlink adapter speed set to 4000 kHz
Info : Unable to match requested speed 8000 kHz, using 4000 kHz
adapter speed: 4000 kHz
Info : device id = 0x20036410
Info : flash size = 64kbytes
target halted due to breakpoint, current mode: Thread
xPSR: 0x61000000 pc: 0x2000003a msp: 0x20005000
semihosting is enabled
Info : halted: PC: 0x080004c0
Info : halted: PC: 0x08000d6c
Info : halted: PC: 0x08000194
Error: jtag status contains invalid mode value - communication failure
Warn : target STM32F103C8Tx.cpu is not halted (gdb fileio)
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 100ms
‘’__Warn : target not halted
Warn : target not halted
Warn : target not halted
Warn : target not halted__’‘

Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 300ms
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 700ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 1500ms
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : no flash patch comparator unit available for hardware breakpoint
Error: can’t add breakpoint: resource not available
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 3100ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 6300ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 6300ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 6300ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine
Examination failed, GDB will be halted. Polling again in 6300ms
Info : Previous state query failed, trying to reconnect
Error: jtag status contains invalid mode value - communication failure
Polling target STM32F103C8Tx.cpu failed, trying to reexamine


how to get out of it?

Rgds,
Bhupi