spi

十分详细的介绍了1602的功能和图片，能够让初学者容易掌握(Very detailed introduction to the 1602 features and pictures, so beginners can easily grasp)

c51单片机实现GPS数据接受并通过数码管显示时间(c51 achieve single-chip GPS data receive and display digital time)

在Linux操作系统和ARM嵌入式实验系统环境下，分析linux下的键盘、LED驱动程序，编写一个应用程序，实现以下功能：在ARM开发板上按下数字键1、2、3时，对应启动模拟量AIN0、AIN1、AIN2采样，并把AD转换的结果从终端输出和LED显示。(Environment of the Linux operating system and ARM embedded experiment system, the Linux keyboard, LED driver, write an application, the following functions: ARM development board to press the number keys 1, 2, 3, corresponding to the start the analog AIN0, AIN1, AIN2 sampling and AD conversion results from the terminal output and LED display.)

采用8位MCU的燃气点火器的源程序，采用汇编程序编写(8-bit MCU gas ignition source, using assembler programming)

实现单片机演奏简单的声调乐曲，外连无源喇叭效果较好(Simple tonal music microcontroller played outside with passive speakers better)

系统侧的电压在0.04秒到0.06秒发生15％的电压跌落，在0.06 秒到0.07秒分别加入了3次和2次谐波，幅值分别为基波电压的20％和15％，相位分别为负25度和35度。(System voltage side occurs in 0.04 seconds to 0.06 seconds 15 of the voltage drop in 0.06 seconds to 0.07 seconds and 3 were added to the second harmonic amplitude of 20 and 15 of the fundamental voltage, phase, respectively negative 25 degrees and 35 degrees.)

这stm32f746描述了如何使用DAC外围 产生使用DMA控制器的信号。 在用户按键每按一下，信号已被选中，可监测 DAC通道： • 三角波形（通道1）。 -自动扶梯的波形（1频道）使用DMA传输。(This STM32F746 code provides a description of how to use the DAC peripheral to generate several signals using DMA controller. For each press on User push-button, a signal has been selected and can be monitored on the DAC channel one: - Triangle waveform (Channel 1). - Escalator waveform (Channel 1) using DMA transfer.)

AD 转换 1602显示 有头文件 有点复杂 pcf8591(AD Conversion 1602 Display)

uart DMA接收任意长度数据，稳定可靠(UART DMA receives data of arbitrary length and is stable and reliable)

说明：  stm32f103c8t6 bootloader(stm32f103c8t6 boot loader)