k210状态机优化版本（乱写的勿看）

weareyoungsss

已于 2023-02-20 01:29:54 修改

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文章标签： python

于 2023-02-13 00:23:58 首次发布

本文链接：https://blog.youkuaiyun.com/weareyoungsss/article/details/129002049

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该代码实现了基于串口二(UART2)的数据接收和解析协议，包括对特定头尾标识符的检测以及数据缓存。当接收到指定头字符时，开始存储数据到缓冲区，直到接收到尾字符，然后清空缓冲区并返回接收到的数据。此外，还提供了一个优化版本，支持任意长度的数据包解析。

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这边调用的是串口二
串口二配置

fm.register(32, fm.fpioa.UART2_RX, force=True)

读一个字节代码可放在在循环或者定时器里

usart_II.Read_onebytes  = uart2.read(1)

#************************************************************************#


class usart_II:
 Read_onebytes = 0
 Read_onebyte = [0]
 Read_Buf = [0]*1024
 Cnt = 0
 recvState  = 0


class usart_II:
 Read_onebytes = 0
 Read_onebyte = [0]
 Read_Buf = [0]*1024
 Cnt = 0
 recvState  = 0


def usart2_Set_Protocol(h1,h2,tail):
    if usart_II.Read_onebytes :
        usart_II.Read_onebyte = (usart_II.Read_onebytes).decode('utf-8')
        if usart_II.recvState == 0 :
            if usart_II.Read_onebyte == h1 :
                usart_II.recvState = 1
                print('0')
                return 1
        if usart_II.recvState == 1 :
            if usart_II.Read_onebyte == h2 :
                usart_II.recvState = 2
                usart_II.Read_Buf=[0]*1024
                print('1')
                return 1
            else:
                usart_II.recvState = 0
                print('解析失败')
                return 1
        if usart_II.recvState == 2 :
            usart_II.Read_Buf[usart_II.Cnt] = usart_II.Read_onebyte
            usart_II.Cnt = usart_II.Cnt+1
            if usart_II.Cnt == 3 :
                usart_II.recvState = 3
                usart_II.Cnt=0
            print('2')
            return 1
        if usart_II.recvState == 3 :
            if usart_II.Read_onebyte == tail :
                print('3')
                usart_II.recvState = 0
                return 0
            else:
                usart_II.Read_Buf=[0]*1024
                usart_II.recvState = 0
                print('解析失败')
                return 1
    return 1
            #usart_I.recvState = 0
            #print(usart_I.Read_Buf[0],usart_I.Read_Buf[1],usart_I.Read_Buf[2])

#***                                                                                   ***#

2023/2/20 1:27
再优化可以设定任意长度

#************************************************************************#


class usart_II_ID:
 Read_onebytes = 0
 Read_onebyte = [0]
 Read_Buf = []
 Cnt = 0
 recvState  = 0


def usart2_Set_ID_Protocol(h1,h2,tail,length):

    #usart_II_ID.Read_onebytes  = uart1.read(1)
    if usart_II_ID.Read_onebytes :
        usart_II_ID.Read_onebyte = (usart_II_ID.Read_onebytes).decode('utf-8')
        if usart_II_ID.recvState == 0 :
            if usart_II_ID.Read_onebyte == h1 :
                usart_II_ID.recvState = 1
                print('0')
                return 1
        if usart_II_ID.recvState == 1 :
            if usart_II_ID.Read_onebyte == h2 :
                usart_II_ID.recvState = 2
                usart_II_ID.Read_Buf=[0]*length
                print('1')
                return 1
            else:
                usart_II_ID.recvState = 0
                img.draw_string(0,50, 'Analysis Failed', color=color_G, scale=2.5)
                print('解析失败')
                return 1
        if usart_II_ID.recvState == 2 :
            usart_II_ID.Read_Buf[usart_II_ID.Cnt] = usart_II_ID.Read_onebyte
            usart_II_ID.Cnt = usart_II_ID.Cnt+1
            if usart_II_ID.Cnt == length :
                usart_II_ID.recvState = 3
                usart_II_ID.Cnt=0
            print('2')
            return 1
        if usart_II_ID.recvState == 3 :
            if usart_II_ID.Read_onebyte == tail :
                print('3')
                img.draw_string(0,50, 'Analysis Done', color=color_G, scale=2.5)
                usart_II_ID.recvState = 0
                print(usart_II_ID.Read_Buf)
                return 0
            else:
                usart_II_ID.Read_Buf=[0]*length
                usart_II_ID.recvState = 0
                img.draw_string(0,50, 'Analysis Failed', color=color_G, scale=2.5)
                print('解析失败')
                return 1
    return 1
            #usart_I.recvState = 0
            #print(usart_I.Read_Buf[0],usart_I.Read_Buf[1],usart_I.Read_Buf[2])

#***                                                                                   ***#