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fwupd/plugins/altos
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Richard Hughes 9e79223ecf trivial: C99ify more for-loops
2017-09-28 09:23:52 +01:00
..
data Add support for flashing the ChaosKey 2017-01-09 12:21:35 +00:00
fu-altos-firmware.c Remove the ELF support from libdfu and move the code to the altos plugin 2017-09-07 18:39:23 +01:00
fu-altos-firmware.h Remove the ELF support from libdfu and move the code to the altos plugin 2017-09-07 18:39:23 +01:00
fu-altos-tool.c trivial: C99ify more for-loops 2017-09-28 09:23:52 +01:00
fu-device-altos.c Ensure more devices set the device summary 2017-09-11 15:10:50 +01:00
fu-device-altos.h trivial: Add flags to fu_device_altos_write_firmware() 2017-01-09 21:25:50 +00:00
fu-plugin-altos.c Remove the confusing ALLOW_OFFLINE and ALLOW_ONLINE flags 2017-08-26 18:09:21 +01:00
meson.build Remove the ELF support from libdfu and move the code to the altos plugin 2017-09-07 18:39:23 +01:00
README.md Add support for flashing the ChaosKey 2017-01-09 12:21:35 +00:00

README.md

Altos Support

Introduction

Altos is a 8051 operating system for Altus-Metrum projects. The ChaosKey is a hardware random number generator that attaches via USB.

When the ChaosKey when inserted it appears as a device handled by the kernel with VID 0x1d50 and PID 0x60c6. If pins 1 and 5 are shorted as the device is connected then the bootloader is run, which presents VID 0xfffe and PID 0x000a.

The bootloader communication is not handled in the kernel, and a tty device is created so userspace can communicate with the hardware. Commands the bootloader accept are as follows:

List Information

Command: l\n Several lines of text about the device are transferred to the host, e.g.

altos-loader
manufacturer     altusmetrum.org
product          AltosFlash
flash-range      08001000 08008000
software-version 1.6.8

There doesn't appear to be any kind of end-of-message signal.

Read Flash

Command: R $addr\n where $addr is a memory address 0x8001000->0x8008000. 256 bytes of raw data are then transferred to the host.

Write Flash

Command: W $addr\n where $addr is a memory address 0x8001000->0x8008000. 256 bytes of raw data are then transferred to the device.

Application Mode

Command: v\n The device will reboot into application mode. This is typically performed after flashing firmware completes successfully.