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[Embeded Linux] gsadfgwadfgasgd DL : 0: 一、 uboot是ppcboot和armboot合并而成，现在主流的bootloader为uboot和redboot 二、 bootm addr_kernel addr_initrd 三、移植uboot时最好（一定）要找到一个自己板子的原形（即自己的板子是在这个板子上做一些修改而来的）的版本，这样就可以事半功倍。这样要修改的地方就比较少，也比较容易了。uboot支持很多平台，与一个具体平台相关的主要有三个地方： 1、./include/configs/xxxxx.h, 主要定义了flash、sdram的起始地址等信息，一般要修改flash的起始地址、大小，有时候会有位宽等。 2、./board/xxxxx/*，这个目录下主要有两三个.c文件，主要为该平台的初始化和flash操作的函数。有时候flash的操作需要修改，不过一般都是找一个现有的支持该flash的驱动，一般情况在uboot别的./board/平台下就会有现成的，拷贝过了就可以了。 -The design uses Mitsubishi FX2N Series PLC as a core component, eight-way Responder to complete a production control system. The system components for eight or eight players at the same time answer in Taiwan, with a total station holds the start/stop switch, answer the Start button, answer the reset button, the host quiet hint button and manually set the sub-sets of scoring buttons, etc., sub-station you have a answer in the button. The system consists of seven-segment display countdown, sub-station number, player points and the current time, temperature, and serve as driven by PLC controlled equipment. Because the system has a lot of seven-segment, so I used the dynamic scan method to reduce the number of ports. There is a buzzer to answer in the beginning, answer reset answer time out, answer in illegal, no one answer in a quiet and tips. 17 light-emitting diode, a total station is used to display and answer no answer in overtime, each sub-station to answer in two to show success and
Date : 2025-12-27 Size : 21kb User : smallwei
[Embeded Linux] dai_ma DL : 0: 在A8上建立服务器，利用QT建立客户端，两者通过TCP/IP协议进行通讯。STM32通过BMP180、BH1750传感器获得温度，大气压强，光强等参数。通过串口通信将这些参数传给服务器，服务器通过数据分析判断是否通过蜂鸣器进行报警。同时将这些参数传给客户端用来实时显示。客户端可以控制服务器报警程序的开始和停止。注：A8上运行linux系统！！！(Set up the server on A8 and use QT to set up the client, which communicates through the TCP/IP protocol. STM32 obtains temperature, atmospheric pressure and light intensity through BMP180 and BH1750 sensors. These parameters are passed to the server through serial communication, and the server determines whether or not to call the alarm via a buzzer. These parameters are also passed to the client for real-time display. The client can control the start and stop of the server alarm program. Note: A8 runs Linux system!!!)
Date : 2025-12-27 Size : 2.57mb User : 文松