The error typically appears during a Set-Top Box (STB) firmware recovery or "de-bricking" process. It indicates that the device's BootROM is waiting for a "Get" command or data handshake from your PC, but the communication channel (UART) is blocked or misconfigured . Common Causes
Sometimes the flashing software itself becomes unstable or mismanaged by the operating system.
: The serial buffer on the STB side has filled up with data it cannot process, or the handshake between the PC and the STB failed to clear the buffer. This usually stops the flashing process immediately. Common Causes
This error is rarely a sign of a completely dead (hard-bricked) processor. Instead, it is usually caused by one of the following issues: The error typically appears during a Set-Top Box
: The communication speed (e.g., 115200) between the PC and the STB is not synchronized, leading to buffer overflows.
Ensure the GXDownloader_boot.exe (or similar tool) has the correct Chip Type selected.
: A missing or unstable GND pin between the PC adapter and the STB will cause heavy line noise, corrupting data into garbage packets that fill the UART buffer. : The serial buffer on the STB side
The data transmission speed configured on your computer does not match the speed expected by the STB.
If the above steps fail, you may need to use a JTAG or ST-Link tool to connect directly to the microcontroller to inspect the state.
: You check your "shipping lines" (the RS232 or USB-to-TTL cable). You realize the TX (Transmit) RX (Receive) Instead, it is usually caused by one of
: Ensure the tool (e.g., GXDownloader_boot.exe or similar) is set to the correct speed, typically 115200 or 9600 .
This error seldom appears during normal operation. It emerges during low-level firmware recovery or flashing, typically when:
What or processor (e.g., HiSilicon, Amlogic) you are working on Which flashing software (e.g., HiTool, PuTTY) you are using
If you are trying to flash a firmware update or unbrick a digital set-top box (STB) and you've encountered the cryptic message you’re likely dealing with a communication breakdown between your PC and the device's processor.
