dac_spi

检测电路输出电压变化量，控制电压变化量在规定的变化区域内变化。且让MSP430F149单片机的IO口输出由小逐渐增大的信号作为电流参考信号，输入到比较器的同相输入端。(The change in output voltage detection circuit, the control voltage changes the amount of the required changes within the region. Let MSP430F149 microcontroller IO port output signal from the small increases as the current reference signal input to the comparator s inverting input.)

说明：  基于STM32F103的程序代码，亲测有效，可以直接下载使用(The program code based on STM32F103 is valid and can be downloaded and used directly.)

12864在51上的驱动，可在驱动的基础上改进添加需要的功能。(12864 is driven on 51, which can improve the required functions on the basis of driver.)

PS2通信，用stm32单片机模拟键盘鼠标往电脑送数据。(PS2 communication with stm32 SCM simulation to send data to a computer keyboard and mouse.)

求数字系统设计的与非门简化的立方体运算的质立方体的选拔法程序(digital system design for the door with a simplified calculation of quality cube cube method selection procedures)

STM32 CAN-BUS总线参考代码 适合学习研究(STM32 CAN-BUS bus reference code suitable for study)

使用MDK写的STM32F4的485通信程序，不使用延迟，解决了因485控制端翻转过快而导致的数据发送不完全的情况(The MDK write the STM32F4 in 485 communications program, do not use the delay to resolve the 485 control terminal flip too fast data transmission is not completely)

基于msp430单片机的秒表及12864函数，经过149及169验证的(Msp430 microcontroller based function stopwatch and 12864, after 149 and 169 validation)

说明：  zigbee document upload 23/7/2019

读SD卡用SST单片机与tlc5620播放音乐程序(Read SD card with SST SCM and play music tlc5620 procedures)