The method of cumulative contribution rate Based on the time delay estimation of power spectrum, Achieve a grayscale image and further control for video surveillance.

实现can通信，经本人验证完全可以使用，拿去吧。(#include "can.h" #include "led.h" #include "delay.h" #include "usart.h" #include "led.h" #include "delay.h" #include "key.h" #include "sys.h&qu

经测试，此代码可以实现2.4G（NRF24L01）的通信。 内有大量的注释，初学者可以看注释弄明白 其中还有其他的代码，软件SPI通信方式、串口、GPIO口、延时。(After testing, this code can implement the communication of 2.4G (NRF24L01). There are a lot of annotations, and the beginners can see the annotations to understand

基于STM32的标准软件模拟I2C接口程序，只要修改引脚定义及延时接口程序即可使用，改程序已在工业产品上大量应用，十分的稳定可靠并且代码编写规范。(The standard software based on STM32 simulates the I2C interface program. It can be used only by modifying the pin definition and delay interface program. The modified program