751e2454bf
Atmel introduced a "Device Service Unit" (DSU) that holds the CPU in reset if TCK is low when srst (RESET_N) is deasserted. Function is similar to SMAP in ATSAM4L, see http://openocd.zylin.com/2604 Atmel's EDBG adapter handles DSU reset correctly without this change. An ordinary SWD adapter leaves TCK in its default state, low. So without this change any use of sysresetreq or srst locks the chip in reset state until power is cycled. A new function dsu_reset_deassert is called as reset-deassert-post event handler. It optionally prepares reset vector catch and DSU reset is released then. Additionally SWD clock comment is fixed in at91samdXX.cfg and clock is lowered a bit to ensure a margin for RC oscillator frequency deviation. adapter_nsrst_delay 100 is commented out because is no more necessary after http://openocd.zylin.com/2601 Change-Id: I42e99b1b245f766616c0a0d939f60612c29bd16c Signed-off-by: Tomas Vanek <vanekt@fbl.cz> Reviewed-on: http://openocd.zylin.com/2778 Tested-by: jenkins Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk> |
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| .. | ||
| board | ||
| chip | ||
| cpld | ||
| cpu/arm | ||
| interface | ||
| target | ||
| test | ||
| tools | ||
| bitsbytes.tcl | ||
| mem_helper.tcl | ||
| memory.tcl | ||
| mmr_helpers.tcl | ||