The error message bootrom error: wait for get ,please check stb uart receive ! is a very specific low-level error typically found on Rockchip embedded platforms (such as RK3288, RK3399, RK3036, etc.). There is no single academic "paper" that explains this specific error string because it is a vendor-specific debug message. However, to understand and solve this, you need technical documentation (datasheets) and flash programming guides. Here is an analysis of what the error means, why it happens, and the technical documents you should reference to solve it. 1. Technical Explanation of the Error Context: This error occurs during the BootROM stage. When a Rockchip SoC (System on Chip) boots, the internal BootROM code runs first. If it cannot find valid bootable media (like an SD card, eMMC, or NAND flash), it falls back to Mask ROM Mode (also called Loader Mode). In this mode, the SoC waits for a computer to send it a bootloader binary via the USB OTG or UART interface.
"wait for get" : The SoC is sending a request packet (often a "RK" handshake) asking the host computer to send it data ("Get" command). It is currently waiting for this transfer to begin. "please check stb uart receive" : The system attempted to receive data via UART but failed.
STB : Likely refers to the Set-Top-Box platform or the internal status block. UART : The serial communication interface.
In summary: The device is in a "bricked" or empty state. It is trying to download a bootloader from your computer via the serial cable (UART), but the transfer is failing due to connection issues, timing, or incorrect tool usage. bootrom error: wait for get ,please check stb uart receive !
2. Relevant Documentation (The "Papers") Since this is a hardware vendor issue, the "papers" you need are official Technical Reference Manuals (TRMs) and Application Notes. A. Rockchip TRM (Technical Reference Manual)
Purpose: To understand the BootROM flow and UART protocol. Search for: "Rockchip RK[YourChip] TRM" (e.g., RK3399 TRM). Section to read: Look for "Boot Sequence" or "Mask ROM Mode" . This explains the hardware state machine that generates your error.
B. Rockchip Linux SDK / User Guide
Purpose: Step-by-step recovery procedures. Search for: "Rockchip User Guide" or "Rockchip Linux SDK". Section: "Upgrade Firmware" or "Maskrom Mode" .
3. How to Fix It (Troubleshooting Steps) This error usually appears when using tools like RKAndroidTool (Windows) or upgrade_tool (Linux) to unbrick a device. Cause 1: UART Connection Issues (Hardware) The error explicitly mentions UART receive.
Check TX/RX: Ensure the TX pin of the device is connected to the RX pin of your USB-to-TTL adapter, and vice versa. Baud Rate: Ensure the baud rate is set correctly (usually 1500000 for newer Rockchip devices, or 115200 for older ones). Bad Cable: A low-quality USB-to-UART cable often fails to handle high baud rates (1500000), causing data corruption, which leads to the "receive" error. The error message bootrom error: wait for get
Cause 2: Protocol Mismatch (USB vs UART) The error says it's waiting on UART, but you might be trying to flash via USB.
Most Rockchip tools use USB OTG for flashing because it is faster and more reliable. If the device is trying to download via UART (because USB isn't detected or configured), it is extremely slow and prone to errors. Solution: Connect the USB OTG cable (usually USB-C or Micro-USB) to the host PC. The tool (RKDevTool) should detect the device as "Maskrom" or "Loader" via USB, bypassing the UART error.