The sixth issue of SRTP

* The keyboard is assumed to be a matrix having 4 rows by 6 columns. However, this code works for any * matrix arrangements up to an 8 x 8 matrix. By using from one to three of the column inputs, the driver * can support "SHIFT" keys. These keys are: SHIFT1, SHIFT2 and SHIFT3.

利用单片机控制实现的计算器，用lcd显示计算的过程和结果。-SCM control to achieve use of calculator, lcd display with the calculation process and results.

89c51的t6963驱动程序 图形写入方式，直接数据水平及垂直方向坐标，并将字库代码地址写入dptr便可使用。 作者：周长盛-89c51 the driver graphics writing, direct data horizontal and vertical coordinates of the direction and character code addresses will be used to write dptr. Author : Zhou Changsheng

ATmega32L接ILI9325 320*240 TFT -ATmega32L then ILI9325 320* 240 TFT

这是使用MAX3100和89S52单片机的红外放射原理图和用C语言写的程序代码。-This is the use of MAX3100 and MCU 89S52 Schematic infrared radiation and the use of C language to write the program code.

单片机计数器程序。-counter SCM procedures.

51单片机浮点子程序固定源码，包含详细说明。

8019sch网络芯片 带PCB图 8019sch网络芯片 带PCB图-8019sch network chip with PCB Figure 8019sch network chip with PCB diagram

SPI是一个环形总线结构，由ss（cs）、sck、sdi、sdo构成，其时序其实很简单，主要是在sck的控制下，两个双向移位寄存器进行数据交换。 假设下面的8位寄存器装的是待发送的数据10101010，上升沿发送、下降沿接收、高位先发送。 那么第一个上升沿来的时候 数据将会是sdo=1；寄存器=0101010x。下降沿到来的时候，sdi上的电平将所存到寄存器中去，那么这时寄存器=0101010sdi，这样在8个时钟脉冲以后，两个寄存器的内容互相交换一次。这样就完成里一个spi时序。 -SPI bus is a ring structure, by ss (cs), sck, sdi, sdo composition, its timing is actually very simple, mainly under the control of the sck and two bi-directional shift register for data exchange. Assuming the following 8-bit register is loaded to send the data to be 10,101,010, rising to send, receive falling edge, high first sent. Well, the first rising edge to the time data will be sdo = 1 register = 0101010x. Falling edge comes, sdi on the level will be stored to the register, then register at this time = 0101010sdi, so 8 clock pulse later, the contents of two registers to exchange time. This will be completed in a spi timing.

一个用ATMega88来实现一key键和一个Rotor的代码，可能过UART上传数据。-A key with ATMega88 to achieve a key and a Rotor code, may be to UART upload data.