Uninterrupted display firmware update system

Abstract

A display firmware update system that does not interrupt image display includes: first and second flash memory modules, first and second switching modules, an image scaling controller module, and a microcontroller module. The image scaling controller module reads firmware data from the first flash memory module to drive the display to show images. When the microcontroller module receives new firmware data, it controls the second switching module to establish a data transmission path between the microcontroller module and the second flash memory module, and writes the new firmware data into the second flash memory module. During the firmware update process, the first switching module maintains the data transmission path between the image scaling controller module and the first flash memory module, ensuring that the display does not interrupt image display due to the firmware update process. This solves the problem of current display firmware update methods being unable to determine update progress and posing security risks.

Claims

1. A display firmware update system that does not interrupt image display, comprising: First flash memory module; A second flash memory module; a first switching module electrically connected to the first flash memory module and the second flash memory module; a second switching module electrically connected to the first flash memory module and the second flash memory module; an image scaling controller module electrically connected to the first flash memory module and the second flash memory module through the first switching module to read a first version of firmware data to drive a display to display an image; and a microcontroller module electrically connected to the first switching module and the second switching module; wherein when the microcontroller module receives a second version of firmware data, it controls the second switching module to open the data transmission path between the microcontroller module and the second flash memory module, and executes a firmware data update procedure to write the second version of firmware data into the second flash memory module; During the firmware update process, the first toggle switch module maintains the data transmission path between the image scaling controller module and the first flash memory module so that the display does not interrupt the image display due to the firmware update process.

2. The display firmware update system as claimed in claim 1, wherein after the firmware data update procedure is completed, the microcontroller module controls the first switch module and the second switch module to change a switching state, so that the image scaling controller module switches to access the second flash memory module, and connects the data transmission path between the microcontroller module and the first flash memory module, so that the first flash memory module becomes the access object of the subsequent firmware update procedure.

3. The display firmware update system as claimed in claim 2, wherein before the first switch module and the second switch module change the switching state, the microcontroller module first detects the state of the vertical synchronization signal of the image scaling controller module; when the vertical synchronization signal is in the vertical blanking interval (VBI), the microcontroller module controls the first switch module and the second switch module to change the switching state.

4. The display firmware update system as claimed in claim 2, wherein before the first switch module and the second switch module change the switching state, the microcontroller module sends a pause command to the image scaling controller module to freeze the display image, and after the first switch module and the second switch module complete the switching state, a restore command is sent to the image scaling controller module to unfreeze the display image.

5. The display firmware update system as claimed in claim 1, wherein the first flash memory module, the second flash memory module, the microcontroller module, and the image scaling controller module use a Serial Peripheral Interface (SPI) communication protocol to transmit the first version firmware data, the second version firmware data, and other versions firmware data.

Images