题目内容

CC2530具有______________个串行通信接口。

A. 1
B. 2
C. 3
D. 4

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编写UART0串口初始化代码，完成PC端串口接收数据的串口初始化。void initUART0(void){PERCFG = 0x00;//设置外设I/O口P0SEL = 0x3c;//设置P0.2、P0.3、P0.3、P0.4位外设I/O口U0CSR |= 0x80;//设置USART0工作模式为UART模式//设置波特率为115200//设置波特率为115200U0UCR |= 0x80; //设置UART工作参数UTX0IF = 0;//清零UART0 TX中断标志EA = ;//使能全局中断}

A. U0BAUD = 216;
B. U0GCR = 11;
C. 1
D. 无

查询方式接收串口数据，程序要不断地查询中断标志位TCON.URX0IF是否为1。

A. 对
B. 错

Tom is my roommate. He usually _ at 7:40, but yesterday he _ at 6:00.

A. get up; got up
B. gets up; got up
C. got up; gets up
D. got up; get up

He _ in Beijing now, but 5 years ago he _ in New York.

A. lived; live
B. live; lived
C. lives; lived
D. lived; lives