使用EM78P468单片机做的IC卡煤气表程序。

独立模块通过到单片机控制，数码管显示。能显示秒，分，时-Independent modules to single-chip microcomputer control, digital tube display. Can show seconds, minutes, hours

两个单片机串行通行程序，完全可行的程序，-Two single-chip serial passage procedure, entirely feasible procedures,

PCB设计基础教程关于pcb的介绍及其设计方法-PCB Design Tutorial on the pcb

GCC的SD卡完整程序！可根据自己需要更改！-GCC complete the procedure of SD card! May need to change according to their own!

C8051F52xA_53xA单片机SPI源代码驱动-C8051F52xA_53xA single-chip SPI driver source code

用普单片机实现低成本高精度A_D与D_A转换关键词 单片机 　A/D转换 　D/A转换 　PWM(脉冲宽度调制)比较器-Pu realize low-cost single-chip microcomputer with high-precision conversion A_D with D_A Key words Single-chip A/D converter D/A converter PWM (pulse width modulation) comparator

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.

SN75176,用51系列的单片机，波特率为9600，串口方式1，发送数据-SN75176

该代码是在单片机MCU中实现多线程的嵌入式操作系统-the code is in SCM MCU achieve multithreading RTOS

调用汉字库显示汉字（点阵字库和曲线字库）-show characters (font and lattice curves font)