disable ERASE pin
disabling the ERASE pin prevents accidental erase for the flash
memory while the board is powered on (e.g. in case the user
overcomes the weak 100 kOhm pull-down for more than 220 ms by
touching or shorting the pin).
the flash is still erasable using the ERASE pin during power up.
it is only disabled after boot completed.
Change-Id: Ic3332eb1d4247a07988b2fd841f40e79862d06a7
diff --git a/firmware/libboard/common/source/board_lowlevel.c b/firmware/libboard/common/source/board_lowlevel.c
index 8210938..b4d7d32 100644
--- a/firmware/libboard/common/source/board_lowlevel.c
+++ b/firmware/libboard/common/source/board_lowlevel.c
@@ -127,6 +127,9 @@
SUPC->SUPC_SMMR = SUPC_SMMR_SMTH_3_0V | SUPC_SMMR_SMSMPL_CSM |
SUPC_SMMR_SMRSTEN_ENABLE;
+ /* disable ERASE pin to prevent accidental flash erase */
+ MATRIX->CCFG_SYSIO |= CCFG_SYSIO_SYSIO12;
+
/* enable both LED and green LED */
PIOA->PIO_PER |= PIO_LED_RED | PIO_LED_GREEN;
PIOA->PIO_OER |= PIO_LED_RED | PIO_LED_GREEN;