8051CDemo

STM32F103，DMX512串口1接收，串口5发送(sorry my english is not good. this is abaout STM32 DMX512 USART)

说明：  基于STM32F103利用SPI协议，RC522多功能读取，修改，删除卡片(Based on STM32F103 and SPI protocol, RC522 can read, modify and delete cards with multiple functions.)

说明：  锁相电路是相位锁定环(Phase Locked Loop)的简称，主要由鉴相器、环路滤波、压控振荡器成 。主要是要掌握LabVIEW图形化编程特点，(PLL circuit is phase-locked loop (Phase Locked Loop) for short, mainly by the phase detector, loop filter, VCO into. Mainly to grasp the features of LabVIEW graphical programming,)

PIC C CCS TIMER1 10MS

STM32F407ZGT开发板实现TFT LCD显示实验(STM32F407ZGT development board realizes TFT LCD display experiment)

输入通道捕捉程序，适用于飞思卡尔JM60单片机，用于捕捉信号。(The input channels capture program for the Freescale JM60 microcontroller used to capture the signal.)

使用Jk触发器实现PLL鉴频器电路 还没仿真测试 只作为参考(jk flipflop for PLL frequency discriminator)

光伏电池阵列输出功率受光照强度和温度变化的影响，因此最大功率点跟踪（MPPT）技术广泛应用于光伏系统中。在所有最大功率点(MPP)控制策略中，扰动观察（P&O）MPPT算法因易实现被广泛应用，然而它的缺点是在稳定工作状态下工作点通过MPP 时会导致能量振荡损耗，并且在光照强度或温度发生突变时表现较差的动态响应。在本文中，提出一种改进型变步长扰动观察MPPT 算法，此方法依据工作点动态调整步长变化，与传统固定步长方法比较，本文提出的方法(Photovoltaic array output power is affected by light intensity and temperature change, so the maximum power point tracking (MPPT) technique is widely used in light volt system.In all of the maximum power point (MPP) control strategy, the disturbance observation (P&O) MPPT algorithm is widely used because of easy to implement, but its drawback is that under the steady working state working point by MPP will cause energy loss of oscillation, and the mutations in poor light intensity and temperature of dynamic response.In this article, the paper puts forward a modified variable step disturbance observation MPPT algorithm, this method is based on the working point dynamic adjustment step change, compared with the traditional fixed step length method, the proposed approach)

嵌入式系统：基于ARM920T嵌入式音视频压缩系统设计(Embedded system: based on the ARM920T embedded audio and video compression system design)

本文件实现的功能是获取stm32f0芯片的唯一ID，并通过串口打印。(Get stm32f0 chip unique ID, and print through the serial port)