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docs: bootloader microsd creation note and typo fix (#47)

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mcudev 2017-10-15 13:27:44 -04:00 committed by Pavol Rusnak
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2 changed files with 12 additions and 1 deletions
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11
docs/bootloader.md
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@ -29,6 +29,17 @@ if it did not, then a corruption/erasure of later stage flash memory would
leave the device unusable (only the boardloader could run and it would not
pass execution to a later stage that fails signature validation).
Developer note:
A microSD card can be prepared with the following. Note that the bootloader is allocated 128 KiB.
WARNING: Ensure that you want to overwrite and destroy the contents of `/dev/mmcblk0` before running these commands.
Likewise, `/dev/mmcblk0` may be replaced by your own specific destination.
1. `sudo dd if=/dev/zero of=/dev/mmcblk0 bs=512 count=256 conv=fsync`
1. `sudo dd if=build/bootloader/bootloader.bin of=/dev/mmcblk0 bs=512 conv=fsync`
## Second Stage - Bootloader
Second stage checks the integrity and signatures of the firmware and runs

2
docs/memory.md
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@ -9,7 +9,7 @@
| Sector 2 | 0x08008000 - 0x0800BFFF | 16 KiB | boardloader (1st stage) (write-protected)
| Sector 3 | 0x0800C000 - 0x0800FFFF | 16 KiB | ?
| Sector 4 | 0x08010000 - 0x0801FFFF | 64 KiB | storage area #1
| Sector 5 | 0x08020000 - 0x0803FFFF | 128 KiB | boardloader (2nd stage)
| Sector 5 | 0x08020000 - 0x0803FFFF | 128 KiB | bootloader (2nd stage)
| Sector 6 | 0x08040000 - 0x0805FFFF | 128 KiB | firmware
| Sector 7 | 0x08060000 - 0x0807FFFF | 128 KiB | firmware
| Sector 8 | 0x08080000 - 0x0809FFFF | 128 KiB | firmware