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disable ERASE pin

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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
This commit is contained in:
Kévin Redon
2019-08-12 20:49:04 +02:00
parent 4b487b836a
commit acb7bd9fbe
1 changed files with 3 additions and 0 deletions
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3
firmware/libboard/common/source/board_lowlevel.c
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@@ -127,6 +127,9 @@ extern WEAK void LowLevelInit( void )
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;