From 6d26e3e768e3be66eb7edd43d52a039a601e03cd Mon Sep 17 00:00:00 2001 From: Angus Gratton Date: Tue, 1 Jul 2014 10:23:25 +1000 Subject: [PATCH] nRF51822: Add workaround for PAN-16 where not all RAM blocks reliably enabled on reset According to Nordic Semiconductor Product Anomaly Notice (document NRF51822-PAN), item 16, some revisions of nRF51822 sometimes reset without all RAM blocks enabled. This was noted on NRF51822-QFAA rev CA/C0, only 8KiB of memory was accessible. This patch turns on all RAM following a debugger induced reset (matches specified behaviour.) Change-Id: I4f8be4ec3d1271da7fe5bc9a084fdcb2968535bb Signed-off-by: Angus Gratton Reviewed-on: http://openocd.zylin.com/2202 Tested-by: jenkins Reviewed-by: Andreas Fritiofson --- tcl/target/nrf51.cfg | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tcl/target/nrf51.cfg b/tcl/target/nrf51.cfg index abb46fddaf..129060d356 100644 --- a/tcl/target/nrf51.cfg +++ b/tcl/target/nrf51.cfg @@ -50,3 +50,11 @@ flash bank $_CHIPNAME.uicr nrf51 0x10001000 0 1 1 $_TARGETNAME # clock to 1Mhz should be OK # adapter_khz 1000 + +proc enable_all_ram {} { + # nRF51822 Product Anomaly Notice (PAN) #16 explains that not all RAM banks + # are reliably enabled after reset on some revisions (contrary to spec.) So after + # resetting we enable all banks via the RAMON register + mww 0x40000524 0xF +} +$_TARGETNAME configure -event reset-end { enable_all_ram } -- 2.30.2