Test_ifnonnull

MCS-51IO口模拟SPI读24位ADC（ADS1252）(MCS-51IO SPI port analog read 24 ADC (ADS1252))

proteus file of ring counter

zlg 关于rc522 rc523 pn512的底层代码和14443A 和14443B 只要掌握了这些代码就可以开发对应的M1卡和CPU卡读写程序(ZLG about rc522 rc523 pn512 underlying code and 14443 a and 14443 b as long as to master the code can develop corresponding M1 card and CPU card read and write procedures)

MPC08卡的高级测试程序，能够对MPC08卡的大多数功能进行测试。(MPC08 card advanced testing procedures, capable of MPC08 card most of the features to be tested.)

我的网口控制程序，是基于51单片机写的，很有价值的，现分享出来(My network port control procedures, is written based on 51 single-chip, very valuable, it is shared out)

说明：  16点阵屏单片机程序，程序中有注说明，通俗易懂！(16 lattice screen SCM procedures, there is the process that is easily understood!)

说明：  stm32永磁同步电机双闭环无感foc代码(Double closed-loop non inductive FOC code of STM32 permanent magnet synchronous motor)

STM32F107的单片机，针对红外遥控解码，我们已经使用过(STM32F107 infrared remote control code)

改程序适应于电力系统短路电流计算，生成节点导纳矩阵和阻抗矩阵。(Change program suitable for power system short-circuit current calculation, to generate the node admittance matrix and the impedance matrix.)

读取ms5803传感器的各项数据，用串口将数据打印(Read the data of the ms5803 sensor and use the serial port to print the data)