On Mon, 08 Jan 2018 17:35:29 +0100, Matthias Welwarsky wrote: > On Montag, 8. Januar 2018 16:53:39 CET acala...@free.fr wrote: >> Hello and Happy new year! >> >> I am currently implementing OpenOCD support for the xPC56 microcontrollers, >> but I am facing some difficulties. These MCUs are developed by >> NXP/Freescale (MPC56xx) and STM (SPC56x) and based on a PowerPC E200 core. > > [snip] > >> So I am wondering, is supporting this kind of architecture is part of the >> roadmap? Could I get some help to find an elegant way to adapt it with >> current OpenOCD design? > > I don't think that there is anything like that on the roadmap, simply because > a formal roadmap doesn't exist. If you're looking into supporting these MCUs, > the right approach is to implement your own "jtagc" tap infrastructure, it's > certainly not recommended trying to shoehorn that into the current jtag tap > code. You'll need to write your own access primitives using bare JTAG scan > commands, those will probably be the correct level of abstraction.
on the other hand, it should not be that hard: 1) openocd already contains nexus support, even incomplete and for another architecture, avr32, i tested that it doesn't work properly probably from same reason. 2) tap structure has pointer to dap, this is used during target initialization (see dap_init() in cortex_a.c, cortex_m.c and aarch64.c) which offers possibility to be used more generaly. > > Best regards, > Matthias > >> >> Regards, >> Antoine >> >> ---------------------------------------------------------------------------- >> -- Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> OpenOCD-devel mailing list >> OpenOCD-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/openocd-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ OpenOCD-devel mailing list OpenOCD-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openocd-devel
