swd: Move README into the respective dir(s).

[sigrok-dumps.git] / swd / README

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--------------------------------------------------------------------------------
-SWD
--------------------------------------------------------------------------------
-
-This is a set of example captures of the ARM SWD (version 1) protocol.
-
-Details:
-http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ihi0031c/index.html
-(Registration required)
-
-
-Logic analyzer setup
---------------------
-
-  Probe       SWD
-  ---------------
-  0           swclk
-  1           swdio
-
-
-Data
-----
-
-Different SWD sessions showing different types of behaviour:
-
-* ftdi_openocd/
-
-Using an FTDI-based adapter via "openocd ftdi resistor hack". OpenOCD
-0.9.0 development version. Device under test is a Nordic nRF51822.
-
-Command line:
-
-  $ openocd -f interface/ftdi/olimex-arm-usb-tiny-h.cfg \
-            -f interface/ftdi/swd-resistor-hack.cfg \
-            -f target/nrf51.cfg
-
-** ftdi_openocd/init.sr
-   Initialising device, IDCODE read, etc.
-   OpenOCD args: -c "init; exit"
-
-** ftdi_openocd/init_noreply.sr
-   Initialising when no device is connected (i.e. all responses are 1s.)
-   OpenOCD args: -c "init; exit"
-
-** ftdi_openocd/init_write_0xabbabeeb.sr
-   Initialise, write 20 bytes of 0xabbabeeb at start of RAM.
-   OpenOCD args: -c "init; halt; mww 0x20000000 0xabbabeeb 20; exit"
-
-** ftdi_openocd/init_wait_fault.sr
-   Initialise, attempt to write flash fill of 0xabbabeeb via async loader.
-   This causes SWD WAIT states in "overrun" mode, so the first WAIT causes all
-   subsequent responses to be FAULT until OpenOCD clears the sticky error bit.
-
-   For this capture OpenOCD was patched with this change (known to induce
-   SWD WAITs): http://openocd.zylin.com/#/c/2204/
-
-   OpenOCD args: -c "init; reset halt; flash fillw 0 0xabbabeeb 2048; exit"
-
-
-* stlink_openocd/
-
-Using an STLINK-V2 adapter via OpenOCD 0.9.0 development
-version. Device under test is a Nordic nRF51822.
-
-Command line:
-
-  $ openocd -f interface/stlink-v2.cfg -c 'transport select hla_swd' \
-            -f target/nrf51.cfg
-
-** stlink_openocd/init.sr
-   Intiliasing device, IDCODE read, etc.
-   OpenOCD args: -c "init; exit"
-
-** stlink_openocd/init_write_0xabbabeeb.sr
-   Initialise, write 20 bytes of 0xabbabeeb at start of RAM.
-   OpenOCD args: -c "init; halt; mww 0x20000000 0xabbabeeb 20; exit"
-
-** stlink_openocd/wait_retry.sr
-   Capture showing an SWD WAIT with overrun mode not enabled (in contrast to
-   ftdi_openocd/wait_retry.sr), adapter immediately retries and gets an OK
-   response.
-
-   For this capture OpenOCD was patched with this change (known to induce
-   SWD WAITs): http://openocd.zylin.com/#/c/2204/
-
-   OpenOCD args: -c "init; reset halt; flash fillw 0 0xabbabeeb 2048; exit"
-