PID_S

说明：  只适用于特定的黑线地图，主要是分享编程思想和方法，需要别的地图的话，要自己编写(Only applicable to specific black line maps, mainly sharing programming ideas and methods)

串口传输温度数据，ds1820，数码管显示带小数点(Serial transmission of temperature data, ds1820, digital display with decimal point)

AD7793 measurement PT100

红外遥控七彩led灯带，包好贪吃蛇，流水灯等多种模式(Infrared remote control lamp belt, pack a variety of modes)

辅助数字电路课程学习，说明TTL电路中驱动电流之间的 关系。 (auxiliary digital circuit courses on TTL circuit-drive current relationship.)

说明：  内含C文件及Proteus仿真文件 矩阵键盘输入密码，初始密码为12345678,每按一次键有短滴声,输入密码正确液晶屏显示正确信息并且电机转动，输入密码错误会发出警报，LED灯闪烁，复位取消警报，0--9号键为数字键,10号键为确认键，11号键清除键清除所输入密码或取消修改密码，12、13、14号键实现修改密码功能。(Containing C file and Proteus simulation file Matrix keyboard input password, the initial password is 12345678, every time a key is pressed, there is a short sound, the correct input password LCD screen displays the correct information and the motor rotates, the input password error will send an alarm, LED flashes, reset and cancel the alarm, 0-9 keys for the digital key, 10 keys for the confirmation key, 11 keys to clear the input secret. Code or cancel password modification, key 12, 13, 14 to achieve password modification function.)

pcf8591AD转换芯片，51单片机控制28BYJ48步进电机(Pcf8591AD conversion chip, 51 single chip computer control 28BYJ48 stepper motor)

DS1302实时时钟芯片驱动程序,系统时钟7.3728MHZ，设置熔丝位为外部高频石英晶体振荡，启动时间4.1ms。(DS1302 real-time clock chip driver, the system clock 7.3728MHZ, set the fuse bit for the external high-frequency quartz crystal oscillation, startup time of 4.1ms.)

对带FIFO的OV7670模块的驱动，显示设备为LCD。实测可用。(For the driver of the OV7670 module with FIFO, the display device is an LCD. Measured available.)

stm32f103读写AT24C256的C语言程序(stm32f103 read and write the AT24C256 C-language program)