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This commit is contained in:
santiagogf89
2017-02-05 12:44:24 +01:00
committed by GitHub
parent d67d8948f6
commit 2e55cd6257
1 changed files with 18 additions and 5 deletions
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23
targets/MK22F51212/src/startup/gcc/startup_MK22F51212.S
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@@ -343,12 +343,25 @@ __isr_vector:
.size __isr_vector, . - __isr_vector .size __isr_vector, . - __isr_vector
/* Flash Configuration */ /* SGF TODO add Flash protection for the Bootloader sectors. */ /* Flash Configuration */
/* FSEC byte: 0x95 - 0b10010101
KEYEN = 10, MEEN = 01, FSLACC = 01, FLSEC =01
Mass erase enabled and security enabled. 01 has been selected
because that way both bits should swap to change the function
making it much less likely for an error to happen. */
/* FPROT0: 0xF8. Each bit marks 1/32 of the flash as protected.
512 Kb/32 = 16 Kb. We will protect the first 3 sectors to avoid
that the MCU itself could erase the BL.
Sector 0-2 = 0x0000 - 0xBFFF. */
.section .FlashConfig, "a" .section .FlashConfig, "a"
.long 0xFFFFFFFF .long 0x01020304 /* First 4 bytes of the Backdoor key. Not used */
.long 0xFFFFFFFF .long 0x05060708 /* Next 4 bytes of the Backdoor key */
.long 0xFFFFFFFF .long 0xFFFFFFF8 /* Program flash protection bytes */
.long 0xFFFFFFFE .long 0xFFFFFF95 /* FSEC byte, FOPT byte, Reserved, Reserved */
.text .text
.thumb .thumb