PLC 测试代码，芯片STM32，测试内容：RAM定位 GPIO PWM Systick RTC ADC DMA EEPROM(24C16) USART 外部中断 -PLC test code, chip STM32, contents of the tests: RAM location GPIO PWM Systick RTC ADC DMA EEPROM (24C16) USART External Inter

SYSTICK STM32F4DISCOVERY RUNING TEST SAMPLE OK

上电后，串口软件显示一次字符串‘请发送你要开始计数的数字’。然后PC端发出一个数字，根据这个数字，每隔2秒显示递增2的数字。（数字超过9就回0）(When the power is on, the serial software displays a string. "Please send the number you want to start counting.". Then the PC side issues a number, which, according t

基本例程—SysTick（系统滴答定时器）操作(Basic routine - SysTick (system tick timer) operation)