import utime
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from driver import UART
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# 串口实例化
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#ttl串口
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uart0 = UART()
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uart0.open("serial1")
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#rs232串口
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uart1 = UART()
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uart1.open("serial2")
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if __name__ == '__main__':
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print("Initial start")
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utime.sleep(1)
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while True:
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# 创建一个writeBuf字节数组，用于串口读
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resultSize = 0
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result = bytearray(50) # RS232串口接收数据
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resultSize = uart1.read(result)
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print("read data length", resultSize)
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print("read data",result)
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print("read data",result.decode('utf-8'))
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utime.sleep_ms(1000)
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if(resultSize > 0):
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# TTL串口发送接收到的数据
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strResult=result.decode('utf-8')
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list= strResult.split(',')
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print(list[2])
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if(len(list[2])==8):
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# 转换结果方便计算
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tzNumber=float(list[2])
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# 计算体重+0.1kg
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tzNumber=tzNumber+0.1
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#转回string类型
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tzStr=str(tzNumber)
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#构建一个8位空字符串
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lsjg=' '
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#构建一个临时变量
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qianStr=""
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#拼凑原来的空字符
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for x in range(len(list[2])-len(tzStr)):
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qianStr+=" "
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#拼接计算后的list[2]
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list[2]=qianStr+tzStr
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#转为原始数据字符串
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list2=",".join(list)
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print('new result',list2)
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#转成bytearray发送到串口
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sendByarray=bytearray(list2.encode("utf-8"))
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uart0.write(sendByarray)
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utime.sleep_ms(1000)
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#ST,GS, 17.5,kg .encode()
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print("this is usb reply") # usb口作为交互口，利用print打印消息
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