CN116424247A - AC 8025-based rapid imaging system and method - Google Patents
AC 8025-based rapid imaging system and methodDownload PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及汽车电子技术领域内的基于AC8025的快速成像系统及方法。The invention relates to an AC8025-based fast imaging system and method in the technical field of automotive electronics.
背景技术Background technique
目前，车载成像系统实现方法主要为系统正常启动后，开启各应用软件，显示各应用软件的交互界面；车载成像系统包括一般信息显示和应用交互界面，快速成像能够极大的提升用户体验，特别是快速倒车辅助成像系统。倒车辅助成像系统以图像、声音的直观形式告知驾驶者车与障碍物的相对位置，解除因后视镜存在盲区带来的困扰，从而为驾驶者倒车泊车提供方便，消除安全隐患；但由于中央处理器单元操作系统的常规启动时间较长，且操作系统的常规启动时间已经很难压缩，使倒车辅助成像系统从开机到成像的时间很难再优化，无法实现快速成像的要求。At present, the implementation method of the vehicle-mounted imaging system is mainly to start each application software after the system starts normally, and display the interactive interface of each application software; the vehicle-mounted imaging system includes general information display and application interaction interface, and fast imaging can greatly improve the user experience. It is a fast reversing auxiliary imaging system. The reversing auxiliary imaging system informs the driver of the relative position of the car and the obstacle in the intuitive form of images and sounds, and relieves the trouble caused by the blind area of the rearview mirror, thereby providing convenience for the driver to reverse the car and eliminating potential safety hazards; The normal start-up time of the operating system of the central processing unit is long, and the normal start-up time of the operating system is already difficult to compress, which makes it difficult to optimize the time from start-up to imaging of the reversing auxiliary imaging system, and cannot meet the requirements of fast imaging.
发明内容Contents of the invention
本发明的目的是提供一种基于AC8025的快速成像系统及方法，从而达成快速成像的目的。The purpose of the present invention is to provide a fast imaging system and method based on AC8025, so as to achieve the purpose of fast imaging.
为实现上述目的，本发明提供了一种基于AC8025的快速成像系统，包括供电单元，供电单元与控制单元相连，控制单元与感知转换单元相连，感知转换单元与中央处理器单元相连，中央处理器单元分别与控制单元、内存单元以及显示单元相连。To achieve the above object, the present invention provides a fast imaging system based on AC8025, including a power supply unit, the power supply unit is connected to the control unit, the control unit is connected to the perception conversion unit, the perception conversion unit is connected to the central processing unit, and the central processing unit The units are respectively connected with the control unit, the memory unit and the display unit.
与现有技术相比，本发明的有益效果在于，由供电单元与车载蓄电池连接，控制单元检测到User（驾驶员）的点火&倒车指令后，控制单元判断当前状态并唤醒中央处理器单元，中央处理器单元与内存单元完成快速启动，车载ADAS根据User的点火&倒车信号，ASDS输出GVIF3信号给到感知转换单元，感知转换单元接收到GVIF3后输出CSI信号给到中央处理器单元，中央处理器单元将接收的倒车图像信号进行处理（叠加倒车文言信息）并输出LVDS信号，中央处理器单元输出的LVDS信号驱动显示单元，从而达成快速成像的目的。Compared with the prior art, the beneficial effect of the present invention is that the power supply unit is connected to the vehicle battery, and after the control unit detects the user (driver) ignition & reversing command, the control unit judges the current state and wakes up the central processing unit, The central processing unit and the memory unit complete the quick startup. According to the user's ignition & reversing signal, the ADAS outputs the GVIF3 signal to the perception conversion unit. After receiving the GVIF3, the perception conversion unit outputs the CSI signal to the central processing unit. The central processing The processor unit processes the received reversing image signal (superimposing reversing classical Chinese information) and outputs LVDS signal, and the LVDS signal output by the central processing unit drives the display unit, so as to achieve the purpose of fast imaging.
作为本发明的进一步改进，供电单元包括电源模块一和电源模块二，电源模块一和电源模块二均与车载蓄电池相连，电源模块一与控制单元相连，电源模块二分别与控制单元、中央处理器单元、内存单元以及感知转换单元相连；控制单元包括MCU和电子开关，MCU与电子开关相连，MCU和电子开关均与电源模块一相连，MCU分别与感知转换单元、中央处理器单元以及内存单元相连。As a further improvement of the present invention, the power supply unit includes a power module one and a power module two. Unit, memory unit and perception conversion unit are connected; the control unit includes MCU and electronic switch, MCU is connected to electronic switch, MCU and electronic switch are connected to power module one, MCU is respectively connected to perception conversion unit, central processing unit and memory unit .
这样电源模块一输出常电给MCU和电子开关，驾驶员发出IGN信号，MCU则给电源模块二使能信号，从而让电源模块二启动输出电源给感知转换单元、中央处理器单元、内存单元以及显示单元，而中央处理器单元收到电源后，会检测MCU发来的信号，从而根据信号进入相对应的模式，而感知转换单元和内存单元则由中央处理器单元控制进行快速的图像转换处理，最终由中央处理器单元将数据输送到显示单元，实现快速成像显示。In this way, the power module 1 outputs constant power to the MCU and electronic switch, the driver sends an IGN signal, and the MCU sends an enable signal to the power module 2, so that the power module 2 starts to output power to the perception conversion unit, central processing unit, memory unit and The display unit, and the central processing unit will detect the signal sent by the MCU after receiving the power, so as to enter the corresponding mode according to the signal, while the perception conversion unit and memory unit are controlled by the central processing unit for fast image conversion processing , and finally the central processing unit sends the data to the display unit to realize fast imaging display.
作为本发明的进一步改进，中央处理器单元包括SOC，感知转换单元包括CAN收发器、DES解码器以及TP触摸模块，SOC分别与CAN收发器、DES解码器以及TP触摸模块相连，CAN收发器分别与车载CAN总线以及MCU相连，DES解码器与ADAS相连，CAN收发器、DES解码器、TP触摸模块以及SOC均与电源模块二相连，SOC与电子开关相连。As a further improvement of the present invention, the central processing unit includes a SOC, the perception conversion unit includes a CAN transceiver, a DES decoder and a TP touch module, the SOC is connected to the CAN transceiver, the DES decoder and the TP touch module respectively, and the CAN transceiver is respectively It is connected to the vehicle CAN bus and MCU, the DES decoder is connected to ADAS, the CAN transceiver, DES decoder, TP touch module and SOC are all connected to the power module 2, and the SOC is connected to the electronic switch.
这样电源模块二分别输出电源信号给到SOC、CAN收发器 、TP触摸模块、DES解码器、内存单元和显示单元，SOC检测MCU发送的Standby信号，而 内存单元未掉电且运行状态未复位，SOC直接读取内存单元中之前保存的状态，不需要进行校验和自检过程，SOC将读取的状态通过LVDS发送给显示单元，液晶显示屏快速显示STR睡眠前的应用信息，从而实现快速成像。In this way, the power supply module 2 respectively outputs power signals to the SOC, CAN transceiver, TP touch module, DES decoder, memory unit and display unit. The SOC detects the Standby signal sent by the MCU, but the memory unit is not powered off and the operating status is not reset. The SOC directly reads the previously saved state in the memory unit, without the need for verification and self-inspection, the SOC sends the read state to the display unit through LVDS, and the LCD quickly displays the application information before the STR sleep, thereby realizing fast imaging.
作为本发明的进一步改进，内存单元包括LPDDR4和EMMC，LPDDR4分别与SOC、电源模块二以及电子开关相连，EMMC分别与SOC以及电源模块二相连；显示单元包括液晶显示屏，液晶显示屏分别与SOC以及电源模块二相连。As a further improvement of the present invention, the memory unit includes LPDDR4 and EMMC, LPDDR4 is connected with SOC, power module two and electronic switch respectively, EMMC is connected with SOC and power module two respectively; Display unit comprises liquid crystal display screen, liquid crystal display screen and SOC respectively and power module two.
这样LPDDR4内存未断电，且未被复位，保存了之前的系统和应用数据，SOC直接读取LPDDR4内存中的信息后直接在液晶显示屏上显示，不需要进行校验和自检，从而实现快速成像。In this way, the LPDDR4 memory is not powered off, and has not been reset, and the previous system and application data are saved. The SOC directly reads the information in the LPDDR4 memory and displays it on the LCD screen directly, without the need for verification and self-test, so as to realize Fast imaging.
为了实现上述目的，本发明还提供了基于AC8025的快速成像方法，其特征在于，包括如下三种控制模式：In order to achieve the above object, the present invention also provides a fast imaging method based on AC8025, which is characterized in that it includes the following three control modes:
检修模式：系统第一次与蓄电池连接上电，实现各个单元的信息交互和响应；Maintenance mode: the system is connected to the battery for the first time to realize the information interaction and response of each unit;
STR模式：不需要进行校验和自检，从而实现快速成像，从点火到图像显示的时间T<1.2S；STR mode: there is no need for calibration and self-test, so as to achieve fast imaging, the time from ignition to image display is T<1.2S;
非STR模式：进行点火启动并倒车，实现从点火到倒车，实现倒车影像的图像显示的时间T<1.2S。Non-STR mode: start the ignition and reverse the car, and realize the time T<1.2S from ignition to reversing, and realize the image display of the reversing image.
与现有技术相比，本发明的有益效果在于，通过检修模式，可以在第一次通电时，将系统整体各个部件相互关联起来，从而在后续使用时，能够根据不同的状态，进入不同的模式，在STR模式下可以不需要进行校验和自检，无论是倒车成像还是其他应用的成像都能够实现快速成像，而在非STR模式下，则依然可以确保倒车影像的快速成像。Compared with the prior art, the beneficial effect of the present invention is that, through the maintenance mode, the various components of the whole system can be associated with each other when the power is first turned on, so that in subsequent use, different states can be entered according to different states. In the STR mode, there is no need for calibration and self-inspection, whether it is reversing imaging or imaging of other applications, fast imaging can be achieved, while in non-STR mode, the fast imaging of reversing images can still be ensured.
作为本发明的进一步改进，检修模式的具体控制如下，As a further improvement of the present invention, the specific control of the maintenance mode is as follows,
步骤1.1，蓄电池为电源模块一和电源模块二供电；Step 1.1, the battery supplies power to power module 1 and power module 2;
步骤1.2，电源模块一输出常电给到MCU，MCU开始运行，电源模块一输出常电给到电子开关；Step 1.2, once the power module outputs constant power to the MCU, the MCU starts to run, and the power module outputs constant power to the electronic switch;
步骤1.3，驾驶员发送IGN信号给到MCU；Step 1.3, the driver sends an IGN signal to the MCU;
步骤1.4，MCU收到驾驶员发送的IGN信号后，发送EN1&EN2信号给到电源模块二，MCU发送Standby信号和QR信号给到SOC；Step 1.4: After receiving the IGN signal from the driver, the MCU sends the EN1&EN2 signal to the power module 2, and the MCU sends the Standby signal and the QR signal to the SOC;
步骤1.5，电源模块二收到EN1&EN2信号后，分别输出电源信号给到SOC、LPDDR4、EMMC，液晶显示屏，CAN收发器 、TP触摸模块，DES解码器；Step 1.5, after the power module 2 receives the EN1&EN2 signal, it outputs the power signal to SOC, LPDDR4, EMMC, LCD screen, CAN transceiver, TP touch module, and DES decoder respectively;
步骤1.6，SOC收到电源模块二发出的电源信号后，检测MCU发送的Standby信号和QR信号，SOC读取EMMC中启动程序并在LPDDR4中运行启动程序,SOC完成启动后，发送LVDS信号给到液晶显示屏；Step 1.6, after the SOC receives the power signal from the power module 2, it detects the Standby signal and the QR signal sent by the MCU, the SOC reads the startup program in the EMMC and runs the startup program in the LPDDR4, and after the SOC completes the startup, it sends the LVDS signal to LCD;
步骤1.7，液晶显示屏收到电源模块二发送的电源信号和SOC发送的LVDS信号，完成启动并显示系统信息；Step 1.7, the LCD screen receives the power signal sent by the power module 2 and the LVDS signal sent by the SOC, completes the startup and displays the system information;
步骤1.8，EMMC收到电源模块二发送的电源信号后进入工作状态并与通过SDIO总线与SOC进行数据交互；Step 1.8, EMMC enters the working state after receiving the power signal sent by the power module 2 and performs data interaction with the SOC through the SDIO bus;
步骤1.9，电子开关收到电源模块一发送的电源信号后进入工作状态，根据MCU提供的EN3信号选择SOC提供的Reset1信号作为输出信号；Step 1.9, the electronic switch enters the working state after receiving the power signal sent by the power module 1, and selects the Reset1 signal provided by the SOC as the output signal according to the EN3 signal provided by the MCU;
步骤1.10，LPDDR4收到电源模块二发送的电源信号和电子开关发送的Reset2信号进入启动状态，并通过DRAM_BUS与SOC进行数据交互，同时在LPDDR4中运行SOC启动程序和SOC应用程序；Step 1.10, LPDDR4 receives the power signal sent by the power module 2 and the Reset2 signal sent by the electronic switch to enter the startup state, and performs data interaction with the SOC through the DRAM_BUS, and runs the SOC startup program and the SOC application program in the LPDDR4 at the same time;
步骤1.11，CAN收发器收到电源模块二发送的电源信号和MCU发送的Wakeup信号后进入工作状态，通过UART与MCU进行数据交互，同时通过CAN_BUS获取车载CAN网络系统中的交互信息；Step 1.11, the CAN transceiver enters the working state after receiving the power signal sent by the power module 2 and the Wakeup signal sent by the MCU, performs data interaction with the MCU through the UART, and obtains the interactive information in the vehicle CAN network system through the CAN_BUS at the same time;
步骤1.12，DES解码器收到电源模块二发送的电源信号进入工作状态，SOC通过IIC1对DES解码器进行初始化配置，DES解码器接收ADAS的GVIF3信号转换为CSI信号并发送给SOC；Step 1.12, the DES decoder receives the power signal sent by the power module 2 and enters the working state, the SOC initializes the DES decoder through IIC1, and the DES decoder receives the GVIF3 signal of ADAS and converts it into a CSI signal and sends it to the SOC;
步骤1.13，若驾驶员发送Rev信号给到MCU，MCU通过SPI将要执行的Rev信号发送给SOC，SOC将DES解码器发送的CSI信号进行内部处理，SOC将处理后信号转换为LVDS信号发送给液晶显示屏，液晶显示屏显示倒车影像；Step 1.13, if the driver sends the Rev signal to the MCU, the MCU sends the Rev signal to be executed to the SOC through the SPI, the SOC internally processes the CSI signal sent by the DES decoder, and the SOC converts the processed signal into an LVDS signal and sends it to the LCD Display screen, the LCD screen displays the reversing image;
步骤1.14，TP触摸模块收到电源模块二发送的电源信号后进入工作状态，TP触摸模块通过IIC2将触摸信息发送给SOC，SOC检测TP触摸模块发送的触摸信息并作出响应；Step 1.14, the TP touch module enters the working state after receiving the power signal sent by the power module 2, the TP touch module sends the touch information to the SOC through IIC2, and the SOC detects the touch information sent by the TP touch module and responds;
步骤1.15，ADAS与车载CAN网络系统通过CAN_BUS交互信息。Step 1.15, ADAS and vehicle CAN network system exchange information through CAN_BUS.
作为本发明的进一步改进，STR模式的具体控制如下，As a further improvement of the present invention, the specific control of the STR mode is as follows,
步骤2.1，驾驶员发送IGN信号给到MCU，MCU收到驾驶员发送的IGN信号，系统进入唤醒状态；Step 2.1, the driver sends an IGN signal to the MCU, the MCU receives the IGN signal sent by the driver, and the system enters the wake-up state;
步骤2.2，MCU发送EN1信号给到电源模块二，电源模块二分别输出电源信号给到SOC、EMMC、液晶显示屏、CAN收发器 、TP触摸模块，DES解码器，SOC检测MCU发送的Standby信号后进入STR唤醒模式；Step 2.2, MCU sends EN1 signal to power module 2, power module 2 respectively outputs power signal to SOC, EMMC, LCD, CAN transceiver, TP touch module, DES decoder, after SOC detects the Standby signal sent by MCU Enter STR wake-up mode;
步骤2.3，由于STR睡眠状态下LPDDR4未掉电且运行状态未复位，SOC直接读取LPDDR4中睡眠前的状态，不需要进行校验和自检过程，SOC将读取的状态通过LVDS发送给液晶显示屏，液晶显示屏快速显示STR睡眠前的应用信息，从而实现快速成像。Step 2.3, since the LPDDR4 is not powered off and the operating state is not reset in the STR sleep state, the SOC directly reads the state before sleep in the LPDDR4, and does not need to perform a verification and self-test process, and the SOC sends the read state to the LCD through LVDS Display screen, the LCD screen quickly displays the application information before STR sleep, so as to achieve fast imaging.
作为本发明的进一步改进，非STR模式的具体控制如下，As a further improvement of the present invention, the specific control of the non-STR mode is as follows,
步骤3.1，驾驶员发送IGN信号和Rev给到MCU，MCU发送EN1&EN2信号给到电源模块二，MCU发送Standby信号和QR信号给到SOC；Step 3.1, the driver sends the IGN signal and Rev to the MCU, the MCU sends the EN1&EN2 signal to the power module 2, and the MCU sends the Standby signal and the QR signal to the SOC;
步骤3.2，电源模块二收到EN1&EN2信号后，分别输出电源信号给到SOC、LPDDR4、EMMC，液晶显示屏，CAN收发器 、TP触摸模块，DES解码器；Step 3.2, after the power module 2 receives the EN1&EN2 signal, output the power signal to SOC, LPDDR4, EMMC, LCD screen, CAN transceiver, TP touch module, DES decoder respectively;
步骤3.3，SOC收到Standby信号和QR信号后进入快速倒车成像模式，SOC中AC8025内部Cortex-R5X快速启动，SOC对DES解码器输入的CSI信号进行处理，SOC输出LVDS信号驱动液晶显示屏，液晶显示屏显示快速倒车图像。Step 3.3: After receiving the Standby signal and the QR signal, the SOC enters the fast reversing imaging mode, the AC8025 internal Cortex-R5X in the SOC starts up quickly, the SOC processes the CSI signal input by the DES decoder, and the SOC outputs the LVDS signal to drive the LCD screen. The display shows the fast reverse image.
作为本发明的进一步改进，驾驶员发送IGN关机信号给到MCU，MCU检测到IGN关机信号,并对蓄电池进行A/D检测；As a further improvement of the present invention, the driver sends an IGN shutdown signal to the MCU, and the MCU detects the IGN shutdown signal, and performs A/D detection on the battery;
若MCU检测到的蓄电池电压值高于10.5V，则执行STR掉电逻辑，MCU发送EN3信号给到电子开关，电子开关选择电源模块一的电源信号作为Reset2输出高电平，MCU通过SPI发送STR模式掉电信息给SOC，SOC执行STR掉电逻辑并进入STR睡眠状态，SOC进入STR睡眠状态后将状态信号通过SPI发送给MCU，MCU收到SOC已进入STR睡眠状态后，MCU发送EN1信号给电源模块二关闭其输出给SOC、EMMC，液晶显示屏，CAN收发器 、TP触摸模块，DES解码器的电压，电源模块二保持给LPDDR4供电，且未被复位，LPDDR4保持关机前的系统及应用程序状态并进入低功耗状态，MCU发送Standby信号给到SOC， MCU完成以上掉电逻辑后进入低功耗状态；If the battery voltage detected by the MCU is higher than 10.5V, the STR power-down logic is executed, the MCU sends the EN3 signal to the electronic switch, the electronic switch selects the power signal of the power module 1 as the Reset2 output high level, and the MCU sends the STR through SPI Mode power-down information to the SOC, the SOC executes the STR power-down logic and enters the STR sleep state. After the SOC enters the STR sleep state, it sends the status signal to the MCU through SPI. After the MCU receives that the SOC has entered the STR sleep state, the MCU sends the EN1 signal to the Power module 2 turns off its output to SOC, EMMC, LCD, CAN transceiver, TP touch module, DES decoder voltage, power module 2 keeps supplying power to LPDDR4, and has not been reset, LPDDR4 keeps the system and application before shutdown The program state enters the low power consumption state, the MCU sends the Standby signal to the SOC, and the MCU enters the low power consumption state after completing the above power-down logic;
若MCU检测到的蓄电池电压值小于10.5V，执行非STR掉电逻辑，MCU通过SPI发送非STR模式掉电信息给SOC，SOC执行非STR掉电逻辑并进入非STR睡眠状态，SOC完成非STR睡眠状态后将状态信号通过SPI发送给MCU，MCU收到SOC已进入非STR睡眠状态后，MCU发送EN1&EN2信号给电源模块二关闭其输出给SOC、EMMC，液晶显示屏，CAN收发器 、TP触摸模块，DES解码器以及LPDDR4的电压，MCU完成以上掉电逻辑后进入低功耗状态。If the battery voltage value detected by the MCU is less than 10.5V, the non-STR power-down logic is executed. The MCU sends the non-STR mode power-down information to the SOC through SPI. The SOC executes the non-STR power-down logic and enters the non-STR sleep state, and the SOC completes the non-STR mode. After the sleep state, the state signal is sent to the MCU through SPI. After the MCU receives that the SOC has entered the non-STR sleep state, the MCU sends the EN1&EN2 signal to the power module 2 and turns off its output to the SOC, EMMC, LCD, CAN transceiver, TP touch Module, DES decoder and LPDDR4 voltage, MCU enters a low power consumption state after completing the above power-down logic.
作为本发明的进一步改进，若STR睡眠状态下，睡眠时间超过72小时后或MCU检测到蓄电池电压值低于10.5V，MCU发送EN2信号给电源模块二，电源模块二关闭输出给LPDDR4的电压，MCU将Standby信号配置为低电平输出，系统进入非STR睡眠状态。As a further improvement of the present invention, if in the STR sleep state, the sleep time exceeds 72 hours or the MCU detects that the battery voltage value is lower than 10.5V, the MCU sends the EN2 signal to the power module 2, and the power module 2 turns off the voltage output to the LPDDR4, The MCU configures the Standby signal as a low-level output, and the system enters a non-STR sleep state.
附图说明Description of drawings
图1为本发明控制功能模块逻辑框图。Fig. 1 is a logic block diagram of the control function module of the present invention.
实施方式Implementation
下面结合附图对本发明进一步说明：Below in conjunction with accompanying drawing, the present invention is further described:
如图1所示的基于AC8025的快速成像系统，包括供电单元，供电单元与控制单元相连，控制单元与感知转换单元相连，感知转换单元与中央处理器单元相连，中央处理器单元分别与控制单元、内存单元以及显示单元相连。The AC8025-based fast imaging system shown in Figure 1 includes a power supply unit, the power supply unit is connected to the control unit, the control unit is connected to the perception conversion unit, the perception conversion unit is connected to the central processing unit, and the central processing unit is respectively connected to the control unit , the memory unit and the display unit are connected.
供电单元包括电源模块一和电源模块二，电源模块一和电源模块二均与车载蓄电池相连，电源模块一与控制单元相连，电源模块二分别与控制单元、中央处理器单元、内存单元以及感知转换单元相连；控制单元包括MCU和电子开关，MCU与电子开关相连，MCU和电子开关均与电源模块一相连，MCU分别与感知转换单元以及中央处理器单元相连，电子开关分别与中央处理器单元以及内存单元相连。The power supply unit includes power supply module 1 and power supply module 2, both of which are connected to the vehicle battery, power supply module 1 is connected to the control unit, and power supply module 2 is respectively connected to the control unit, central processing unit, memory unit and sensor conversion The unit is connected; the control unit includes an MCU and an electronic switch, the MCU is connected to the electronic switch, both the MCU and the electronic switch are connected to the power module one, the MCU is respectively connected to the perception conversion unit and the central processing unit, and the electronic switch is respectively connected to the central processing unit and the The memory unit is connected.
中央处理器单元包括SOC，感知转换单元包括CAN收发器、DES解码器以及TP触摸模块，SOC分别与CAN收发器、DES解码器以及TP触摸模块相连，CAN收发器分别与车载CAN总线以及MCU相连，DES解码器与ADAS相连，CAN收发器、DES解码器、TP触摸模块以及SOC均与电源模块二相连，SOC与电子开关相连。The central processing unit includes SOC, and the perception conversion unit includes CAN transceiver, DES decoder and TP touch module. The SOC is connected to the CAN transceiver, DES decoder and TP touch module respectively, and the CAN transceiver is connected to the vehicle CAN bus and the MCU respectively. , DES decoder is connected with ADAS, CAN transceiver, DES decoder, TP touch module and SOC are all connected with power module 2, and SOC is connected with electronic switch.
内存单元包括LPDDR4和EMMC，LPDDR4分别与SOC、电源模块二以及电子开关相连，EMMC分别与SOC以及电源模块二相连；显示单元包括液晶显示屏，液晶显示屏分别与SOC以及电源模块二相连。The memory unit includes LPDDR4 and EMMC, and the LPDDR4 is connected to the SOC, the second power module and the electronic switch respectively, and the EMMC is connected to the SOC and the second power module respectively; the display unit includes a liquid crystal display, and the liquid crystal display is connected to the SOC and the second power module respectively.
如图1所示的基于AC8025的快速成像方法，其特征在于，包括如下三种控制模式：The fast imaging method based on AC8025 as shown in Figure 1 is characterized in that it includes the following three control modes:
检修模式：系统第一次与蓄电池连接上电，实现各个单元的信息交互和响应；Maintenance mode: the system is connected to the battery for the first time to realize the information interaction and response of each unit;
步骤1.1，蓄电池为电源模块一和电源模块二供电；Step 1.1, the battery supplies power to power module 1 and power module 2;
步骤1.2，电源模块一输出常电给到MCU，MCU开始运行，电源模块一输出常电给到电子开关；Step 1.2, once the power module outputs constant power to the MCU, the MCU starts to run, and the power module outputs constant power to the electronic switch;
步骤1.3，驾驶员发送IGN信号给到MCU；Step 1.3, the driver sends an IGN signal to the MCU;
步骤1.4，MCU收到驾驶员发送的IGN信号后，发送EN1&EN2信号给到电源模块二，MCU发送Standby信号和QR信号给到SOC；Step 1.4: After receiving the IGN signal from the driver, the MCU sends the EN1&EN2 signal to the power module 2, and the MCU sends the Standby signal and the QR signal to the SOC;
步骤1.5，电源模块二收到EN1&EN2信号后，分别输出电源信号给到SOC、LPDDR4、EMMC，液晶显示屏，CAN收发器 、TP触摸模块，DES解码器；Step 1.5, after the power module 2 receives the EN1&EN2 signal, it outputs the power signal to SOC, LPDDR4, EMMC, LCD screen, CAN transceiver, TP touch module, and DES decoder respectively;
步骤1.6，SOC收到电源模块二发出的电源信号后，检测MCU发送的Standby信号和QR信号，SOC读取EMMC中启动程序并在LPDDR4中运行启动程序,SOC完成启动后，发送LVDS信号给到液晶显示屏；Step 1.6, after the SOC receives the power signal from the power module 2, it detects the Standby signal and the QR signal sent by the MCU, the SOC reads the startup program in the EMMC and runs the startup program in the LPDDR4, and after the SOC completes the startup, it sends the LVDS signal to LCD;
步骤1.7，液晶显示屏收到电源模块二发送的电源信号和SOC发送的LVDS信号，完成启动并显示系统信息；Step 1.7, the LCD screen receives the power signal sent by the power module 2 and the LVDS signal sent by the SOC, completes the startup and displays the system information;
步骤1.8，EMMC收到电源模块二发送的电源信号后进入工作状态并与通过SDIO总线与SOC进行数据交互；Step 1.8, EMMC enters the working state after receiving the power signal sent by the power module 2 and performs data interaction with the SOC through the SDIO bus;
步骤1.9，电子开关收到电源模块一发送的电源信号后进入工作状态，根据MCU提供的EN3信号选择SOC提供的Reset1信号作为输出信号；Step 1.9, the electronic switch enters the working state after receiving the power signal sent by the power module 1, and selects the Reset1 signal provided by the SOC as the output signal according to the EN3 signal provided by the MCU;
步骤1.10，LPDDR4收到电源模块二发送的电源信号和电子开关发送的Reset2信号进入启动状态，并通过DRAM_BUS与SOC进行数据交互，同时在LPDDR4中运行SOC启动程序和SOC应用程序；Step 1.10, LPDDR4 receives the power signal sent by the power module 2 and the Reset2 signal sent by the electronic switch to enter the startup state, and performs data interaction with the SOC through the DRAM_BUS, and runs the SOC startup program and the SOC application program in the LPDDR4 at the same time;
步骤1.11，CAN收发器收到电源模块二发送的电源信号和MCU发送的Wakeup信号后进入工作状态，通过UART与MCU进行数据交互，同时通过CAN_BUS获取车载CAN网络系统中的交互信息；Step 1.11, the CAN transceiver enters the working state after receiving the power signal sent by the power module 2 and the Wakeup signal sent by the MCU, performs data interaction with the MCU through the UART, and obtains the interactive information in the vehicle CAN network system through the CAN_BUS at the same time;
步骤1.12，DES解码器收到电源模块二发送的电源信号进入工作状态，SOC通过IIC1对DES解码器进行初始化配置，DES解码器接收ADAS的GVIF3信号转换为CSI信号并发送给SOC；Step 1.12, the DES decoder receives the power signal sent by the power module 2 and enters the working state, the SOC initializes the DES decoder through IIC1, and the DES decoder receives the GVIF3 signal of ADAS and converts it into a CSI signal and sends it to the SOC;
步骤1.13，若驾驶员发送Rev信号给到MCU，MCU通过SPI将要执行的Rev信号发送给SOC，SOC将DES解码器发送的CSI信号进行内部处理，SOC将处理后信号转换为LVDS信号发送给液晶显示屏，液晶显示屏显示倒车影像；Step 1.13, if the driver sends the Rev signal to the MCU, the MCU sends the Rev signal to be executed to the SOC through the SPI, the SOC internally processes the CSI signal sent by the DES decoder, and the SOC converts the processed signal into an LVDS signal and sends it to the LCD Display screen, the LCD screen displays the reversing image;
步骤1.14，TP触摸模块收到电源模块二发送的电源信号后进入工作状态，TP触摸模块通过IIC2将触摸信息发送给SOC，SOC检测TP触摸模块发送的触摸信息并作出响应；Step 1.14, the TP touch module enters the working state after receiving the power signal sent by the power module 2, the TP touch module sends the touch information to the SOC through IIC2, and the SOC detects the touch information sent by the TP touch module and responds;
步骤1.15，ADAS与车载CAN网络系统通过CAN_BUS交互信息。Step 1.15, ADAS and vehicle CAN network system exchange information through CAN_BUS.
STR模式：不需要进行校验和自检，从而实现快速成像，从点火到图像显示的时间T<1.2S；STR mode: there is no need for calibration and self-test, so as to achieve fast imaging, the time from ignition to image display is T<1.2S;
STR模式的具体控制如下，The specific control of STR mode is as follows,
步骤2.1，驾驶员发送IGN信号给到MCU，MCU收到驾驶员发送的IGN信号，系统进入唤醒状态；Step 2.1, the driver sends an IGN signal to the MCU, the MCU receives the IGN signal sent by the driver, and the system enters the wake-up state;
步骤2.2，MCU发送EN1信号给到电源模块二，电源模块二分别输出电源信号给到SOC、LPDDR4、EMMC、液晶显示屏、CAN收发器 、TP触摸模块，DES解码器，SOC检测MCU发送的Standby信号后进入STR唤醒模式；Step 2.2, MCU sends EN1 signal to power module 2, power module 2 respectively outputs power signal to SOC, LPDDR4, EMMC, LCD, CAN transceiver, TP touch module, DES decoder, SOC detects the Standby sent by MCU Enter the STR wake-up mode after the signal;
步骤2.3，由于STR睡眠状态下LPDDR4未掉电且运行状态未复位，SOC直接读取LPDDR4中睡眠前的状态，不需要进行校验和自检过程，SOC将读取的状态通过LVDS发送给液晶显示屏，液晶显示屏快速显示STR睡眠前的应用信息，从而实现快速成像。Step 2.3, since the LPDDR4 is not powered off and the operating state is not reset in the STR sleep state, the SOC directly reads the state before sleep in the LPDDR4, and does not need to perform a verification and self-test process, and the SOC sends the read state to the LCD through LVDS Display screen, the LCD screen quickly displays the application information before STR sleep, so as to achieve fast imaging.
驾驶员发送IGN关机信号给到MCU，MCU检测到IGN关机信号,并对蓄电池进行A/D检测；The driver sends an IGN shutdown signal to the MCU, and the MCU detects the IGN shutdown signal, and performs A/D detection on the battery;
若MCU检测到的蓄电池电压值高于10.5V，则执行STR掉电逻辑，MCU发送EN3信号给到电子开关，电子开关选择电源模块一的电源信号作为Reset2输出高电平，MCU通过SPI发送STR模式掉电信息给SOC，SOC执行STR掉电逻辑并进入STR睡眠状态，SOC进入STR睡眠状态后将状态信号通过SPI发送给MCU，MCU收到SOC已进入STR睡眠状态后，MCU发送EN1信号给电源模块二关闭其输出给SOC、EMMC，液晶显示屏，CAN收发器 、TP触摸模块，DES解码器的电压，电源模块二保持给LPDDR4供电，且未被复位，LPDDR4保持关机前的系统及应用程序状态并进入低功耗状态，MCU发送Standby信号给到SOC（SOC重新启动时，检测唤醒模式使用），MCU完成以上掉电逻辑后进入低功耗状态。If the battery voltage detected by the MCU is higher than 10.5V, the STR power-down logic is executed, the MCU sends the EN3 signal to the electronic switch, the electronic switch selects the power signal of the power module 1 as the Reset2 output high level, and the MCU sends the STR through SPI Mode power-down information to the SOC, the SOC executes the STR power-down logic and enters the STR sleep state. After the SOC enters the STR sleep state, it sends the status signal to the MCU through SPI. After the MCU receives that the SOC has entered the STR sleep state, the MCU sends the EN1 signal to the Power module 2 turns off its output to SOC, EMMC, LCD, CAN transceiver, TP touch module, DES decoder voltage, power module 2 keeps supplying power to LPDDR4, and has not been reset, LPDDR4 keeps the system and application before shutdown The program state enters a low power consumption state, and the MCU sends a Standby signal to the SOC (when the SOC is restarted, it is used to detect the wake-up mode), and the MCU enters a low power consumption state after completing the above power-down logic.
非STR模式：进行点火启动并倒车，实现从点火到倒车，实现倒车影像的图像显示的时间T<1.2S。Non-STR mode: start the ignition and reverse the car, and realize the time T<1.2S from ignition to reversing, and realize the image display of the reversing image.
步骤3.1，驾驶员发送IGN信号和Rev给到MCU，MCU发送EN1&EN2信号给到电源模块二，MCU发送Standby信号和QR信号给到SOC；Step 3.1, the driver sends the IGN signal and Rev to the MCU, the MCU sends the EN1&EN2 signal to the power module 2, and the MCU sends the Standby signal and the QR signal to the SOC;
步骤3.2，电源模块二收到EN1&EN2信号后，分别输出电源信号给到SOC、LPDDR4、EMMC，液晶显示屏，CAN收发器 、TP触摸模块，DES解码器；Step 3.2, after the power module 2 receives the EN1&EN2 signal, output the power signal to SOC, LPDDR4, EMMC, LCD screen, CAN transceiver, TP touch module, DES decoder respectively;
步骤3.3，SOC收到Standby信号和QR信号后进入快速倒车成像模式，SOC中AC8025内部Cortex-R5X快速启动，SOC对DES解码器输入的CSI信号进行处理，SOC输出LVDS信号驱动液晶显示屏，液晶显示屏显示快速倒车图像。Step 3.3: After receiving the Standby signal and the QR signal, the SOC enters the fast reversing imaging mode, the AC8025 internal Cortex-R5X in the SOC starts up quickly, the SOC processes the CSI signal input by the DES decoder, and the SOC outputs the LVDS signal to drive the LCD screen. The display shows the fast reverse image.
若MCU检测到的蓄电池电压值小于10.5V，执行非STR掉电逻辑，MCU通过SPI发送非STR模式掉电信息给SOC，SOC执行非STR掉电逻辑并进入非STR睡眠状态，SOC完成非STR睡眠状态后将状态信号通过SPI发送给MCU，MCU收到SOC已进入非STR睡眠状态后，MCU发送EN1&EN2信号给电源模块二关闭其输出给SOC、EMMC，液晶显示屏，CAN收发器 、TP触摸模块，DES解码器以及LPDDR4的电压，MCU完成以上掉电逻辑后进入低功耗状态。If the battery voltage value detected by the MCU is less than 10.5V, the non-STR power-down logic is executed. The MCU sends the non-STR mode power-down information to the SOC through SPI. The SOC executes the non-STR power-down logic and enters the non-STR sleep state, and the SOC completes the non-STR mode. After the sleep state, the state signal is sent to the MCU through SPI. After the MCU receives that the SOC has entered the non-STR sleep state, the MCU sends the EN1&EN2 signal to the power module 2 and turns off its output to the SOC, EMMC, LCD, CAN transceiver, TP touch Module, DES decoder and LPDDR4 voltage, MCU enters a low power consumption state after completing the above power-down logic.
若STR睡眠状态下，睡眠时间超过72小时后或MCU检测到蓄电池电压值低于10.5V，MCU发送EN2信号给电源模块二，电源模块二关闭输出给LPDDR4的电压，MCU将Standby信号配置为低电平输出，系统进入非STR睡眠状态。If in the STR sleep state, the sleep time exceeds 72 hours or the MCU detects that the battery voltage is lower than 10.5V, the MCU sends the EN2 signal to the power module 2, and the power module 2 turns off the voltage output to the LPDDR4, and the MCU configures the Standby signal as low Level output, the system enters non-STR sleep state.
本发明中，如图1所示，P为蓄电池，L为驾驶员，M为车载CAN网络总线，N为ADAS，即高级驾驶辅助系统。In the present invention, as shown in FIG. 1 , P is a battery, L is a driver, M is a vehicle CAN network bus, and N is an ADAS (advanced driver assistance system).
虚线框① 单元 ：为本发明系统供电单元，包含2个（A和B）模组，A电源模块一，即为PWR1（常电），B为电源模块二，即为PWR2(可控电源)。Dotted line frame ① unit: it is the power supply unit of the system of the present invention, including 2 (A and B) modules, the first power module of A is PWR1 (normal power supply), and the second power module of B is PWR2 (controllable power supply) .
虚线框②单元 ：为本发明系统控制单元，包含2个（C和D）模组，C为MCU（检测车身控制信息，进行电源管理和本系统开机、关机时序），D为电子开关。The dotted box ② unit: is the system control unit of the present invention, including 2 (C and D) modules, C is the MCU (detects the vehicle body control information, performs power management and the system startup and shutdown sequence), and D is the electronic switch.
虚线框③单元 ：为本发明系统感知转换单元，包含3个（E、H和K）模组，E为CAN（CAN收发器，检测和发送车辆CAN Bus上信号转换为UART信号），H为DES（解码器，将外部发送的GVIF3视频信号转换为CSI信号），TP为（触摸模块，将触摸坐标信息转换为IIC信号）。Dotted line box ③ unit: It is the perception conversion unit of the system of the present invention, including 3 (E, H and K) modules, E is CAN (CAN transceiver, which detects and transmits the signal on the CAN Bus of the vehicle and converts it into a UART signal), and H is DES (decoder, convert the externally sent GVIF3 video signal into CSI signal), TP (touch module, convert touch coordinate information into IIC signal).
虚线框④单元 ：为本发明系统中央处理器单元，包含1个模组（F），F为SoC，采用芯片AC8025（片上系统，内部包含多个内核，本发明系统主要使用Cortex-R5X进行视频处理）。Dotted box ④ unit: is the central processing unit of the system of the present invention, including 1 module (F), F is SoC, adopts chip AC8025 (system on chip, contains multiple cores inside, the system of the present invention mainly uses Cortex-R5X for video deal with).
虚线框⑤单元 ：为本发明系统内存单元，包含2个模组（G和J），G为LPDDR4(LowPower Double Data Rate 4，运行内存的速度快慢影响系统启动时间及流畅度)，J为EMMC（Embedded Multi Media Card，存储内存中存放系统软件、导航地图、应用信息及历史应用数据等）。Dotted box ⑤ unit: is the system memory unit of the present invention, including 2 modules (G and J), G is LPDDR4 (LowPower Double Data Rate 4, the speed of running memory affects the system startup time and fluency), J is EMMC (Embedded Multi Media Card, which stores system software, navigation maps, application information and historical application data, etc.) in the storage memory.
虚线框⑥单元 ：为本发明系统的显示单元，包含1个模组（I），I为TFT-LCD（液晶显示屏，显示本系统视频信息）。Dotted line frame ⑥ unit: It is the display unit of the system of the present invention, including a module (I), and I is a TFT-LCD (liquid crystal display screen, which displays the video information of the system).
第一上电时，P为A、B供电；A连接到P电源后，A输出常电P1-MCU给到C（C系统开始运行，检测不到IGN信号时，进入低功耗睡眠状态），A输出常电P1-SW给到D；L发送IGN信号（高电平）给到C；C收到L发送的IGN信号，系统进入非STR唤醒状态，C发送EN1&EN2信号（高电平）给到B，C发送Standby信号（低电平）、QR信号（低电平）给到F。When powering on for the first time, P supplies power to A and B; after A is connected to the power supply of P, A outputs constant power to P1-MCU to C (system C starts running and enters a low-power sleep state when no IGN signal is detected) , A outputs constant power P1-SW to D; L sends IGN signal (high level) to C; C receives the IGN signal sent by L, the system enters non-STR wake-up state, C sends EN1&EN2 signal (high level) To B, C sends Standby signal (low level), QR signal (low level) to F.
B收到EN1&EN2信号（高电平）后，分别输出电源P2-SoC给到F，电源P2-LPDDR给到G，电源P2-TFT给到I，电源P2-TP给到K，电源P2-EMMC给到J，电源P2-DES给到H，电源P2-CAN给到E；F收到P2-SoC电源后，检测C发送的Standby信号（低电平）、QR信号（低电平），F进入非STR、非快速倒车启动模式，F读取J中启动程序并在G中运行启动程序（程序校验和自检是Android系统启动时间较长的主要原因）,F完成启动后，发送LVDS信号给到I；I收到B发送的电源P2-TFT和F发送的LVDS信号，完成启动并显示系统信息。After B receives the EN1&EN2 signal (high level), it outputs the power supply P2-SoC to F, the power supply P2-LPDDR to G, the power supply P2-TFT to I, the power supply P2-TP to K, and the power supply P2-EMMC Provided to J, power supply P2-DES to H, power supply P2-CAN to E; F receives the P2-SoC power supply, detects the Standby signal (low level) and QR signal (low level) sent by C, and F Enter the non-STR, non-quick reverse start mode, F reads the startup program in J and runs the startup program in G (the program verification and self-test are the main reasons for the long startup time of the Android system), and after F completes the startup, send LVDS The signal is sent to I; I receives the power supply P2-TFT sent by B and the LVDS signal sent by F, completes the startup and displays system information.
J收到B发送的电源P2-EMMC后进入工作状态并与通过SDIO总线与F进行数据交互；D收到B发送的电源P1-SW后进入工作状态，根据C提供的EN3信号(低电平)选择F提供的Reset1信号作为输出信号；G收到B发送的电源P2-LPDDR和D发送的Reset2信号进入启动状态，并通过DRAM_BUS与F进行数据交互，同时在G中运行F启动程序和F应用程序；E收到B发送的电源P2-CAN和C发送的Wakeup信号后进入工作状态，通过UART与C进行数据交互，同时通过CAN_BUS获取M中交互信息；H收到B发送的电源P2-DES进入工作状态，F通过IIC1对H进行初始化配置，H接收N的GVIF3信号转换为CSI信号并发送给F。J enters the working state after receiving the power supply P2-EMMC sent by B and performs data interaction with F through the SDIO bus; D enters the working state after receiving the power supply P1-SW sent by B, according to the EN3 signal provided by C (low level ) Select the Reset1 signal provided by F as the output signal; G receives the power supply P2-LPDDR sent by B and the Reset2 signal sent by D to enter the start-up state, and performs data interaction with F through DRAM_BUS, and runs the F startup program and F in G at the same time Application program; E enters the working state after receiving the power supply P2-CAN sent by B and the Wakeup signal sent by C, and performs data interaction with C through UART, and at the same time obtains the interactive information in M through CAN_BUS; H receives the power supply P2-CAN sent by B DES enters the working state, F initializes and configures H through IIC1, and H receives N's GVIF3 signal and converts it into a CSI signal and sends it to F.
若L发送Rev信号（高电平）给到MCU，MCU通过SPI将要执行的Rev信号（高电平）发送给F，F将H发送的CSI信号进行内部处理（叠加文言信息，防冻屏检测），F将处理后信号转换为LVDS信号发送给I，I显示倒车影像；K收到B发送的电源P2-TP后进入工作状态，K通过IIC2将触摸信息发送给F，F检测K发送的触摸信息并作出响应；N与M通过CAN_BUS交互信息（如车门开启状态，在倒车影像中进行模拟成像）。If L sends a Rev signal (high level) to the MCU, the MCU sends the Rev signal (high level) to be executed to F through SPI, and F internally processes the CSI signal sent by H (superimposed classical Chinese information, anti-freezing screen detection) , F converts the processed signal into an LVDS signal and sends it to I, and I displays the reversing image; K enters the working state after receiving the power supply P2-TP sent by B, K sends the touch information to F through IIC2, and F detects the touch sent by K Information and respond; N and M exchange information through CAN_BUS (such as the door opening status, simulated imaging in the reversing image).
L发送IGN关机信号（低电平）给到C，C检测到IGN关机信号,并对P进行A/D检测；若C检测到的P电压值高于10.5V，执行STR掉电逻辑，C发送EN3信号（高电平）给到D，D选择P1-SW作为Reset2输出（高电平），C通过SPI发送STR模式掉电信息给F，F执行STR掉电逻辑并进入STR睡眠状态，F进入STR睡眠状态后将状态通过SPI发送给C，C收到F已进入STR睡眠状态后，C发送EN1信号（低电平）给B关闭P2-SoC、P2-TFT、P2-TP、P2-EMMC、P2-DES、P2-CAN，B给G的电源P2-LPDDR保持供电状态，且未被复位（低电平有效），G保持关机前的系统及应用程序状态并进入低功耗状态，C发送Standby信号（高电平）给到F， C完成以上掉电逻辑后进入低功耗状态。L sends an IGN shutdown signal (low level) to C, C detects the IGN shutdown signal, and performs A/D detection on P; if the voltage value of P detected by C is higher than 10.5V, the STR power-down logic is executed, and C Send EN3 signal (high level) to D, D selects P1-SW as Reset2 output (high level), C sends STR mode power-down information to F through SPI, F executes STR power-down logic and enters STR sleep state, After F enters the STR sleep state, it sends the state to C through SPI. After C receives that F has entered the STR sleep state, C sends the EN1 signal (low level) to B to turn off P2-SoC, P2-TFT, P2-TP, and P2 -EMMC, P2-DES, P2-CAN, the power supply P2-LPDDR of B to G maintains the power supply state, and has not been reset (active low), G maintains the system and application state before shutdown and enters a low power consumption state , C sends a Standby signal (high level) to F, and C enters a low power consumption state after completing the above power-down logic.
若C检测到的P电压值小于10.5V，执行非STR掉电逻辑，C通过SPI发送非STR模式掉电信息给F，F执行非STR掉电逻辑并进入非STR睡眠状态，F进入非STR睡眠状态后将状态信息通过SPI发送给C，C收到F已完成非STR睡眠状态后，C发送EN1&EN2信号（低电平）给B关闭P2-SoC、P2-LPDDR、P2-TFT、P2-TP、P2-EMMC、P2-DES、P2-CAN，C完成以上掉电逻辑后进入低功耗状态。If the P voltage value detected by C is less than 10.5V, non-STR power-down logic is executed, C sends non-STR mode power-down information to F through SPI, F executes non-STR power-down logic and enters non-STR sleep state, and F enters non-STR mode After the sleep state, the state information is sent to C through SPI. After C receives that F has completed the non-STR sleep state, C sends EN1&EN2 signal (low level) to B to turn off P2-SoC, P2-LPDDR, P2-TFT, P2- TP, P2-EMMC, P2-DES, P2-CAN, C will enter the low power consumption state after completing the above power-down logic.
若STR模式下，其睡眠时间超过72小时后或C检测到P电压值低于10.5V，C发送EN2信号（低电平）给B，B关闭电源P2-LPDDR，C将Standby信号配置为低电平输出，系统进入非STR睡眠状态。If in STR mode, its sleep time exceeds 72 hours or C detects that the P voltage value is lower than 10.5V, C sends EN2 signal (low level) to B, B turns off the power supply P2-LPDDR, and C configures the Standby signal as low Level output, the system enters non-STR sleep state.
在汽车处于STR模式的睡眠状态下，L发送IGN信号（高电平）给到C，C收到L发送的IGN信号，系统进入唤醒状态，C发送EN1信号（高电平）给到B，B分别输出电源P2-SoC给到F，电源P2-TFT给到I，电源P2-TP给到K，电源P2-EMMC给到J，电源P2-DES给到给到H，电源P2-CAN给到E，F检测C发送的Standby信号（高电平）后进入STR唤醒状态，由于STR睡眠状态下G未掉电且运行状态未复位，F直接读取G中睡眠前的状态，不需要进行校验和自检过程，F将读取的状态通过LVDS发送给I，I快速显示STR睡眠前的应用信息。When the car is in the sleep state of STR mode, L sends an IGN signal (high level) to C, C receives the IGN signal sent by L, the system enters the wake-up state, C sends EN1 signal (high level) to B, B respectively outputs power supply P2-SoC to F, power supply P2-TFT to I, power supply P2-TP to K, power supply P2-EMMC to J, power supply P2-DES to H, power supply P2-CAN to After reaching E, F detects the Standby signal (high level) sent by C and enters the STR wake-up state. Since G is not powered off and the running state is not reset in the STR sleep state, F directly reads the state before sleep in G, no need to During the verification and self-test process, F sends the read status to I through LVDS, and I quickly displays the application information before STR goes to sleep.
在STR模式下进行睡眠状态唤醒，由于LPDDR4内存未断电，且未被复位，保存了睡眠之前的系统和应用数据，SOC直接读取LPDDR4内存中的信息后在液晶显示屏上直接显示，不需要进行校验和自检，从而实现快速成像，从点火到图像显示的时间T<1.2S。When waking up from sleep state in STR mode, since the LPDDR4 memory is not powered off and has not been reset, the system and application data before sleep are saved, and the SOC directly reads the information in the LPDDR4 memory and displays it on the LCD directly. Calibration and self-test are required to achieve fast imaging, and the time from ignition to image display is T<1.2S.
非STR模式下，L发送IGN信号（高电平）和Rev（高电平）给到C，C发送EN1&EN2信号（高电平）给到B，C发送Standby信号（低电平）、QR信号（高电平）给到F；B收到EN1&EN2信号（高电平）后，分别输出电源P2-SoC给到F，电源P2-LPDDR给到G，电源P2-TFT给到I，电源P2-TP给到K，电源P2-EMMC给到J，电源P2-DES给到给到H，电源P2-CAN给到E；F收到Standby信号（低电平）、QR信号（高电平）后进入快速倒车成像状态，F中AC8025内部Cortex-R5X快速启动（Cortex-R5F内核启动速度快，仅Cortex-R5F内核就可以完成视频处理与转换），F对H输入的CSI信号进行处理（在倒车图像上叠加文言信息，并进行冻屏检测），F输出LVDS信号驱动I，I显示快速倒车图像。In non-STR mode, L sends IGN signal (high level) and Rev (high level) to C, C sends EN1&EN2 signal (high level) to B, C sends Standby signal (low level), QR signal (high level) to F; B receives EN1&EN2 signal (high level), respectively output power supply P2-SoC to F, power supply P2-LPDDR to G, power supply P2-TFT to I, power supply P2- TP is supplied to K, power supply P2-EMMC is supplied to J, power supply P2-DES is supplied to H, power supply P2-CAN is supplied to E; after F receives Standby signal (low level) and QR signal (high level) Enter the fast reversing imaging state, the internal Cortex-R5X of AC8025 in F starts quickly (the Cortex-R5F core starts up quickly, and only the Cortex-R5F core can complete video processing and conversion), and F processes the CSI signal input by H (in reverse Classical Chinese information is superimposed on the image, and the frozen screen detection is performed), F outputs LVDS signal to drive I, and I displays the fast reversing image.
在非STR模式下进行点火启动并倒车，由于AC8025只需完成Cortex-R5X内核启动就可以完成，从点火&倒车到实现图像显示的时间T<1.2S。Ignition start and reverse in non-STR mode, since AC8025 only needs to complete the Cortex-R5X core startup, the time from ignition & reverse to image display is T<1.2S.
本发明在STR模式下，系统成像时间小于1.2s，在STR模式或非STR模式下，从点火&倒车到快速倒车成像时间小于1.2s ；能够灵活实现STR模式与非STR模式切换；使用四维图新AC8025芯片硬件方案，不需要额外使用视频桥接芯片，硬件成本方案较优；点火并快速倒车应用场景下，SoC可灵活进行图像处理，叠加倒车辅助文言（如：请注意周边环境）和倒车辅助线显示；倒车图像有防冻屏技术，避免倒车图像显示异常导致错误判断。In the present invention, under the STR mode, the system imaging time is less than 1.2s, and under the STR mode or non-STR mode, the imaging time from ignition & reversing to fast reversing is less than 1.2s; the switching between STR mode and non-STR mode can be realized flexibly; The new AC8025 chip hardware solution does not require an additional video bridge chip, and the hardware cost solution is better; in the application scenario of ignition and fast reversing, the SoC can flexibly perform image processing, superimpose reversing assistance classical Chinese (such as: please pay attention to the surrounding environment) and reversing assistance Line display; the reversing image has anti-freezing screen technology to avoid misjudgment caused by abnormal display of the reversing image.
本发明不局限于上述实施例，在本公开的技术方案的基础上，本领域的技术人员根据所公开的技术内容，不需要创造性的劳动就可以对其中的一些技术特征作出一些替换和变形，这些替换和变形均在本发明的保护范围内。The present invention is not limited to the above-mentioned embodiments. On the basis of the disclosed technical solutions, those skilled in the art can make some replacements and deformations to some of the technical features according to the disclosed technical content without creative work. These substitutions and modifications are all within the protection scope of the present invention.
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