ʾʹõӲԴ
LPUART1 TX      --   PB5
LPUART1 RX      --   PB7
LED1            --   PA4

LPUART1ͨŲ:
  -- :   9600
  -- ַȣ8bits
  -- ֹͣλ  1bit
  -- żУ飺
  -- Ӳأֹ


ʾʾLPUART1 StopģʽѵḶ́ԴΪƥַ
1ϵͳʱʹRCH72MHz
2LPUART1GPIOϨLED1
3ʼLPUART1ʱԴΪRCH72MHz
4LPUART1Ϊַƥ份ѣƥַΪ0x03
5Stopģʽǰ豣֤շǿձ־RXNEΪ0־OREΪ0
6Stopģʽȴݣ
7յƥַStopģʽѣжнַƥ־㣬洢յƥַ
8˳StopģʽϵͳʱԶָΪRCHرLPUARTʹܣLED1
9ѽյƥַ
