查看“MicroMV 串口通信”的源代码

<p style="font-size:135%">'''MicroMV上的串口通讯'''</p>

*'''UART对象'''

:<source lang="py">
'''
初始化一个串口对象
uart_idx  , 串口ID， 我们这里只能写1或者3
baud_rate , 波特率 
'''
UART(uart_idx, baud_rate)

</source>

*'''初始化UART对象'''
:<source lang="py">
uart = UART(4, 115200)
</source>

*'''UART 函数操作'''
:<source lang="py">
uart.read(10)        # read 10 characters, returns a bytes object
                    # 读入10个字符， 返回一个比特对象
uart.read()            # read all available characters
                    # 读取所有的有效字符
uart.readline()        # read a line
                    # 读入一行
uart.readinto(buf)  # read and store into the given buffer
                    # 读入并且保存在缓存中
uart.write('abc')    # write the 3 characters
                    # 向串口写入3个字符abc
</source>

*'''单个字符的读取与写入'''
:<source lang="py">
uart.readchar()     # read 1 character and returns it as an integer
                    # 读入一个字符
uart.writechar(42)  # write 1 character
                    # 写入ASCALL码为42的字符
</source>

*'''判断串口是否有数据'''
:<source lang="py">
uart.any()          # returns the number of characters waiting
</source>

*'''向串口发送数据的代码'''
:<source lang="py">
# UART Control 串口通信

import time
from pyb import UART

uart = UART(4, 115200)
uart.init(115200, bits=8, parity=None, stop=1) # init with given parameters
while(True):
    uart.write("Hello World!\r")
    print("Hello World")
    # 休眠1s
    time.sleep(1000)
</source>


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