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sim900a gprs上传数据，51单片机c语言源程序(sim900a gprs upload data, 51 c language source)

配置io口，时钟适用于STM32F103系列芯片具体参考芯片手册(Configuration of IO port, clock for STM32F103 series chip specific reference chip manual)

st公式的开源高频注入部分代码(hifreqinj_fpu_ctrl)

该程序是为大家提供简单的AD程序,实现AD转换(This program is to provide you with a simple AD program to achieve AD conversion.)

atmega128单片机开发板附带的程序，12864显示图像(atmega128 MCU development board with the program, 12864 display images)

说明：  一个普通的测量信号频率，主要计算频率计算频率是计算频率(signal frequency)

说明：  lsm6Ds3的硬件IIC驱动程序，读取角速度及加速度，设置LSM中断。(The hardware IIC driver of lsm6Ds3 reads the angular velocity and acceleration and sets the LSM interrupt.)

C51下温度传感实验 检测温度，并用数码管显示出来 。(C51 experimental testing temperature of the temperature sensor and a digital control display.)

能从SD卡读取MP3文件，并且识别后通过LD3320播放MP3，具体使用只需新建一个.ini系统文件存在sd卡，在里面设置好关键词并且所需播放的MP3文件即可(Read MP3 files from the SD card through the LD3320 play MP3 and identify specific use simply create a new the ini system files sd card exists inside set keywords and required to play MP3 files can)

MPU 6050 51单片机测试程序，包含串口通讯和1602显示屏显示(MPU 6050 51 SCM test procedures, including serial communications and display 1602)