auracaster/openocd
3
0
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

AT91SAM4L: handle reset run/halt in SMAP

Browse Source 
This is a remake of http://openocd.zylin.com/1966
originally written by Angus Gratton <gus@projectgus.com>

ATSAM4L has a "System Manager Access Port" (SMAP) that holds the CPU
in reset if TCK is low when srst (RESET_N) is deasserted.
Without this change any use of sysresetreq or srst locks the chip
in reset state until power is cycled.

A new function smap_reset_deassert is called as reset-deassert-post event handler.
It optionally prepares reset vector catch and SMAP reset is released then.

Change-Id: Iad736357b0f551725befa2b9e00f3bc54504f3d8
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/2604
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
This commit is contained in:
Tomas Vanek
2015-03-14 12:03:47 +01:00
committed by Paul Fertser
parent bdfd5bbe04
commit f3b1405fdd
3 changed files with 77 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
doc/openocd.texi
View File

@@ -5152,6 +5152,20 @@ Atmel include internal flash and use ARM's Cortex-M4 core.
This driver uses the same cmd names/syntax as @xref{at91sam3}.
@end deffn
@deffn {Flash Driver} at91sam4l
@cindex at91sam4l
All members of the AT91SAM4L microcontroller family from
Atmel include internal flash and use ARM's Cortex-M4 core.
This driver uses the same cmd names/syntax as @xref{at91sam3}.
The AT91SAM4L driver adds some additional commands:
@deffn Command {at91sam4l smap_reset_deassert}
This command releases internal reset held by SMAP
and prepares reset vector catch in case of reset halt.
Command is used internally in event event reset-deassert-post.
@end deffn
@end deffn
@deffn {Flash Driver} at91sam7
All members of the AT91SAM7 microcontroller family from Atmel include
internal flash and use ARM7TDMI cores. The driver automatically