Hardware display driver section of the gate and the median of the four control o...

LPC2148 SD读写源代码,这个程序实现了对 SD卡的读写操作，有简单的说明，很容易看懂-LPC2148 SD to read and write source code, this process realize the SD card to read and write operations, has a simple explanation, it is easy to understand

一个用C51编写的倒计时程序，可通过PC传送起始时间，也可回传当前时间。比较简单-C51 with a countdown of the preparation process, through PCs starting time, but also back- the present time. Relatively simple

DEW POINT CALCULATION ROUTINE

温度计原理图和源码-thermometer schematic and source

yright 2002 Cygnal Integrated Products, Inc. // // Filename: LIION_BC_MAIN.c // Target Device: 8051F300 // Created: 11 SEP 2002 // Created By: DKC // Tool chain: KEIL Eval C51 // // This is a stand alone battery charger for a Lithium ION battery. // It utilizes a buck converter, controlled by the on-chip 8-bit PWM, // to provide constant current followed by constant voltage battery charge.

此函数把SPI的读写功能集成在一块，传递的val既是向SPI写的数据，也是从SPI读取的数据，只需要在执行读或写之前把MCU的I/O脚设置成相应的输出或输入即可。（因为在大部分应用中，是把SPI的DI和DO相连并用MCU的一个IO口来读写）。-This function of the SPI read and write functionality into a single, transmission of val is not only written to the SPI data is read from the SPI data, only need to read or write in the implementation prior to the MCU

用8051控制DDS信号发生器，产生1HZ-10MHz的正弦波/三角波/方波-DDS with 8051 control signal generator, producing the 1HZ-10MHz sine/triangle/square wave

AD转换的分辨率=参考电压/(总元素-1) 当AD为8位，总元素=256（ff）取参考电压=Vdd=5V时 分辨率=5/(256-1)= 0.019607843-resolution of the AD converter reference voltage =/(total element 1) When the AD for eight, with a total element = 256 (ff) the reference voltage Vdd = = = 5V resolution 5/(256-1) = 0.019607843

用单片机mege16控制的音乐播放原理图-MCU-controlled music player mege16 schematic

c5131-usb-kbd-stand-alone-1_0_1