Keil-C-uVision4-Chinese-tutorial

使用单片机对蜂鸣器进行控制，要求蜂鸣器唱出《八月桂花》这首歌，简单加深对定时器的理解和蜂鸣器的应用，更深入的理解51的内部结构和使用方式。(The buzzer is controlled by single-chip computer, which requires the buzzer to sing the song "Osmanthus fragrans in August". It can simply deepen the understanding of timer and the application of buzzer, and further understand the internal structure and use mode of 51.)

STM32作为主控芯片，72Mhz，利用DMA+PWM实现驱动WS2812，创建16个并行800kBit / s数据流的想法如下： 使用定时器每1.25us创建一个800kHz的时基和一个DMA请求。 使用2个比较模块在低位时间（350ns）和高位时间（700ns）下创建DMA请求 1.25us DMA请求将GPIO端口的所有位设置为高电平 350ns DMA请求将数据从帧缓冲区传输到GPIO端口。如果该位为0，GPIO引脚将变为低电平，否则将保持高电平。 700ns DMA请求将所有GPIO引脚设置为低电平。 重复步骤1到3，直到发送所有位。 这产生脉冲周期为1.25us，脉冲宽度为350ns或700ns的脉冲流，具体取决于脉冲表示的位值，通过DMA将数据传输到GPIO端口意味着每16个LED每位需要一个字（两个字节）。每个LED 24位，每16个LED 24个字（48个字节）。(The idea to create 16 parallel 800kBit/s data streams is the following: Use a Timer to create an 800kHz time base and a DMA request every 1.25us. Use 2 compare modules to create DMA requests at the low bit time (350ns) and the high bit time (700ns) The 1.25us DMA request sets all bits of the GPIO port high The 350ns DMA request transfers the data from the frame buffer to the GPIO port. If the bit is a 0, the GPIO pin will go low, otherwise it will stay high. The 700ns DMA request sets all GPIO pins low. Repeat steps 1 to 3 until all bits have been transmitted. This creates a stream of pulses with a pulse period of 1.25us and a pulse width of either 350ns or 700ns depending on the bit value the pulse represents. Transferring the data via DMA to the GPIO port means that per 16 LEDs one half word (two bytes) is needed per bit. At 24 bits per LED that makes 24 half words (48 bytes) per 16 LEDs.)

aqui te doy algo de la transformada de fourier y la resonancia

24CXX的读写代码,适用于于51单片机SCM.可直接使用。 (24CXX the read and write code, suitable for 51 MCU the SCM can be used directly.)

好的声文同步程序，值得学习，适合于初学者，给大家共同分享(Good sound text synchronization process, it is worth learning, suitable for beginners, for everyone to share)

义隆单片机EM78P153SN 程序 100US延时 汇编语言(Elan microcontroller EM78P153SN program 100US assembly language delay)

说明：  DHT11检测温湿度同时显示在LCD1602的代码(DHT11 detects the temperature and humidity while displaying the code on the LCD1602)

RC500原厂代码，支持ISO14443A所有的层(RC500 original code to support all of the layers ISO14443A)

说明：  输出12路死区互补同步中间对齐PWM的定时器配置(Timer Configuration of 12-way Complementary Dead Zone Synchronized Intermediate Alignment PWM)

待检测pcb板和标准pcb对比，然后对待测pcb腐蚀及膨胀处理，进行缺陷标注显示图像并输出焊盘缺失数，导线缺失数，短路数等。所以源图像均有，并再次测试无误，可以直接运行。(To be detected and the standard pcb board pcb contrast, then treat corrosion test pcb and the expansion process, defect labeling displays images and outputs missing number pad, missing a few wires, short circuit and number. So were the source image, and test again correctly, you can run directly.)