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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
parent 06fc509cbb
commit 6cde2d8378
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 leave the device unusable (only the boardloader could run and it would not
pass execution to a later stage that fails signature validation). 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 - Bootloader
Second stage checks the integrity and signatures of the firmware and runs 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 2 | 0x08008000 - 0x0800BFFF | 16 KiB | boardloader (1st stage) (write-protected)
| Sector 3 | 0x0800C000 - 0x0800FFFF | 16 KiB | ? | Sector 3 | 0x0800C000 - 0x0800FFFF | 16 KiB | ?
| Sector 4 | 0x08010000 - 0x0801FFFF | 64 KiB | storage area #1 | 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 6 | 0x08040000 - 0x0805FFFF | 128 KiB | firmware
| Sector 7 | 0x08060000 - 0x0807FFFF | 128 KiB | firmware | Sector 7 | 0x08060000 - 0x0807FFFF | 128 KiB | firmware
| Sector 8 | 0x08080000 - 0x0809FFFF | 128 KiB | firmware | Sector 8 | 0x08080000 - 0x0809FFFF | 128 KiB | firmware