Crash_Override/OVMS3-idf
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OVMS3-idf/components/bootloader_support/include
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Angus Gratton 17adb40ca8 bootloader: Calculate SHA256 hash of image on every boot 
Makes app image booting more reliable (256-bit rather than 8-bit verification.)

Some measurements, time to boot a 655KB app.bin file and run to app_main() execution.

(All for rev 1 silicon, ie no 340ms spurious WDT delay.)

80MHz QIO mode:
before = 300ms
after = 140ms

40MHz DIO mode:
before = 712ms
after = 577ms

40MHz DIO mode, secure boot enabled
before = 1380ms
after = 934ms

(Secure boot involves two ECC signature verifications (partition table, app) that take approx 300ms each with 80MHz CPU.)
2017-07-19 18:31:59 +10:00
..
esp_efuse.h Flash encryption: Support enabling flash encryption in bootloader, app support 2016-12-01 23:49:12 -08:00
esp_flash_encrypt.h docs: Improve/clarify partition, OTA & SPI flash docs 2017-02-20 15:31:42 +11:00
esp_flash_partitions.h Flash encryption: Support enabling flash encryption in bootloader, app support 2016-12-01 23:49:12 -08:00
esp_image_format.h bootloader: Calculate SHA256 hash of image on every boot 2017-07-19 18:31:59 +10:00
esp_secure_boot.h bootloader: Calculate SHA256 hash of image on every boot 2017-07-19 18:31:59 +10:00