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Adding FPROT flash protection bit for 4k Bootloader on the mk20dx128vlf5

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- Minimum protection size is 4k on the mk20dx128vlf5
This commit is contained in:
Jacob Alexander 2014-11-05 00:09:33 -08:00
parent 9dbd155ebf
commit 1da4903816
1 changed files with 11 additions and 1 deletions
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12
Lib/mk20dx.c
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@ -361,7 +361,17 @@ const uint8_t flashconfigbytes[16] = {
__attribute__ ((section(".flashconfig"), used))
const uint8_t flashconfigbytes[16] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // Backdoor Verif Key 28.3.1
0xFF, 0xFF, 0xFF, 0xFF, // Program Flash Protection Bytes FPROT0-3
//
// Protecting the first 4k of Flash memory from being over-written while running (bootloader protection)
// Still possible to overwrite the bootloader using an external flashing device
// For more details see:
// http://cache.freescale.com/files/training/doc/dwf/AMF_ENT_T1031_Boston.pdf (page 8)
// http://cache.freescale.com/files/microcontrollers/doc/app_note/AN4507.pdf
// http://cache.freescale.com/files/32bit/doc/ref_manual/K20P48M50SF0RM.pdf (28.34.6)
//
0xFF, 0xFF, 0xFF, 0xFE, // Program Flash Protection Bytes FPROT0-3
0xBE, // Flash security byte FSEC
0x03, // Flash nonvolatile option byte FOPT
0xFF, // EEPROM Protection Byte FEPROT