通过STM32程序的编写来形成闭环锁相环，锁住波形的稳定，保持系统的稳定。
资源文件列表
PLL_TEST_OK/HARDWARE/EXTI/exti.c , 1283
PLL_TEST_OK/HARDWARE/EXTI/exti.h , 628
PLL_TEST_OK/HARDWARE/GPIO/gpio.c , 2649
PLL_TEST_OK/HARDWARE/GPIO/gpio.h , 326
PLL_TEST_OK/HARDWARE/GPIO/key.h , 839
PLL_TEST_OK/HARDWARE/TIMER/timer.c , 6757
PLL_TEST_OK/HARDWARE/TIMER/timer.h , 168
PLL_TEST_OK/HARDWARE/WDG/wdg.c , 1731
PLL_TEST_OK/HARDWARE/WDG/wdg.h , 756
PLL_TEST_OK/keilkilll.bat , 399
PLL_TEST_OK/README.TXT , 338
PLL_TEST_OK/SOURCE/HardFault_Handler.C , 46
PLL_TEST_OK/SYSTEM/delay/delay.c , 1685
PLL_TEST_OK/SYSTEM/delay/delay.h , 876
PLL_TEST_OK/SYSTEM/sys/sys.c , 6451
PLL_TEST_OK/SYSTEM/sys/sys.h , 3597
PLL_TEST_OK/SYSTEM/usart/usart.c , 2921
PLL_TEST_OK/SYSTEM/usart/usart.h , 1054
PLL_TEST_OK/USER/main.c , 452
PLL_TEST_OK/USER/SRAM.ini , 389
PLL_TEST_OK/USER/STM32F10x.s , 11307
PLL_TEST_OK/USER/TEST.build_log.htm , 218
PLL_TEST_OK/USER/TEST.uvgui.zqx , 71163
PLL_TEST_OK/USER/TEST.uvopt , 11513
PLL_TEST_OK/USER/TEST.uvproj , 16598
PLL_TEST_OK/USER/TEST_uvopt.bak , 61119
PLL_TEST_OK/USER/TEST_uvproj.bak , 15761