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Use openocd auto-erase when writing flash, and use sysresetreq to reset

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According to its datasheet, LM4 doesn't support vectreset, but does
support sysresetreq.  Using sysresetreq properly resets all
peripherals and cleanly resets the LM4.

Auto-erase makes the flash command faster.

BUG=none
TEST=flash_link_ro, flash_link_a, flash_link, all with different images

Change-Id: I80b72de2ee0f42cee1b0f2f2a53062384d2c29aa
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/27416
This commit is contained in:
Randall Spangler
2012-07-13 14:08:35 -07:00
parent c1701c4f07
commit 1dc7241e3a
2 changed files with 7 additions and 8 deletions
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3
chip/lm4/openocd/lm4x.cfg
View File

@@ -27,6 +27,9 @@ target create $_TARGETNAME cortex_m3 -chain-position $_CHIPNAME.cpu -variant lm3
# 12k working area at base of ram, not backed up
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 0x3000
# Use system reset request, since LM4 doesn't support vectreset
cortex_m3 reset_config sysresetreq
# Ensure that the watchdog is properly disabled when doing flashing
$_TARGETNAME configure -event reset-init {
# Unlock watchdog0

12
chip/lm4/openocd/lm4x_cmds.tcl
View File

@@ -7,14 +7,10 @@
# Program internal flash
proc flash_lm4 {path offset size} {
set firstsect [expr {$offset / 1024}];
set lastsect [expr {($offset + $size) / 1024 - 1}];
reset init;
flash erase_sector internal $firstsect $lastsect;
# Note erase_sector silently fails sometimes; see crosbug.com/p/8632
# Dump a few words as a diagnostic for whether erase succeeded
mdw 0 16
flash write_image $path $offset;
#set firstsect [expr {$offset / 1024}];
#set lastsect [expr {($offset + $size) / 1024 - 1}];
reset halt;
flash write_image erase $path $offset;
reset
}