practic_les2_c_usart1_rx

WeAct BlackPill STM32F411CEU6 GPIOC Pin13 --> LED USART1 RX -->GPIOA Pin10 * If ASCII char Rx < 5, Turn On LED * Minicom : press 3, LED On. Press 9, LED Off * HSI=16 MHz,APB2ENR = 16MHz * Bps/Par/Bits : 115200/-/8N1 * Hardware Flow Control = No * Software Flow Control = No *