OVMS3-idf/components/app_update
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
..
include ota ops: Verify partition argument passed to esp_ota_begin() 2017-02-22 10:26:04 +11:00
test ota ops: Rewrite esp_ota_get_next_update_partition() to be more predictable, add unit tests 2017-02-22 10:26:04 +11:00
component.mk feature/fota_ops_api: add ota core api implement 2016-11-28 17:12:57 +08:00
esp_ota_ops.c bootloader: Calculate SHA256 hash of image on every boot 2017-07-19 18:31:59 +10:00