See the instructions below for making your own. Historically, this cable used to be available for purchase from Sparkfun, but as of late 2021, this product will likely be unavailable for the foreseeable future due to a supply chain shortage. normal -> dev) will erase the wifi settings and fail. While you could try to use wifi, any test that switches boot modes (i.e. To run Tauto or TAST tests, you will generally need to attach a USB-to-ethernet adapter as well.
Reference schematics are available for the SuzyQ.
NEWSBAR GSC CODE ANDROID
SuzyQ includes a USB hub in the cable, which allows the host computer to access both the debug interface (on the SBU pins) and any gadget-mode interfaces exposed by the device-under-test (for example an ADB interface for debugging Android applications). SuzyQ is a cable that tells the GSC to go into debug mode.
NEWSBAR GSC CODE SOFTWARE
More details about and these CCD software interfaces can be found in the documentation section of the EC codebase. Once the SuzyQ cable is connected, GSC makes several USB endpoints available to the host to communicate with the consoles, to program firmware, etc. Note that this prevents use of the DisplayPort alternate-mode (which also uses the SBU pins) but preserves regular USB operation on the port. When this cable is detected the system will connect the GSC full-speed USB2.0 interface to the SBU pins of the Type-C connector. To put GSC into debug mode, the SuzyQ cable has to present itself as a Debug Accessory (see Chapter B of the USB Type-C Specification). This interface can be reached via a special USB Type-C cable called “SuzyQ” on one of the system’s ports.
NEWSBAR GSC CODE CODE
The GSC code uses the microcontroller’s USB interface to expose its debugging functionality. You need to “open” GSC CCD and enable access to most GSC CCD capabilities.Ĭommunicating with Google Security Chip(GSC) For more in depth instructions on using CCD see the following: This document describes basic “Closed Case Debug” (CCD) and debug cable (SuzyQ) information.
Outside of ccd, the servo USB connection also provides: Closed Case Debug replaces the capabilities that previously relied on the servo header. Among other capabilities, this chip allows developers to securely debug the device without physically opening it.Ĭurrent GSC capabilities allow read/write access to a UART on the AP and a UART on the EC, as well as a SPI interface (normally used to access the flash chips) and an I2C interface (normally used to access INAs, but may be used to flash the EC). Newer Chrome OS devices have a secure microcontroller(Google Security Chip or GSC) in them which runs an embedded OS called Cr50 or Ti50. These servo headers are frequently unpopulated on production units. In order to get access to the AP and EC consoles or reprogram a Chrome OS device's firmware or BIOS without using the AP, older Chrome OS devices required opening the device to get access to a debug header used by Servo.
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