BLE 低功耗蓝牙

# ble.py - ASM001/ASM002 BLE Driver
#
# Note: You should copy this module to your OpenMV Cam's SD card or internal
# file system.
#
# This is a driver for the ASM001/ASM002 BLE modules. It takes care of parsing
# commands for you. Please see the http://truconnect.ack.me/2.0/general_overview
# reference guide for how to use the ASM001/ASM002 BLE modules.

from time import sleep
from pyb import Pin, UART

class BLE:
    BLE_NONE=0
    BLE_SHIELD=1

    def command(self, cmd):
        if self.type==self.BLE_SHIELD:
            self.uart.write(cmd)
            self.uart.write("\r\n")
            r=self.uart.read(9)
            if r[0]!=82: raise OSError("Response corrupted!")
            if r[1]==49: raise OSError("Command failed!")
            if r[1]==50: raise OSError("Parse error!")
            if r[1]==51: raise OSError("Unknown command!")
            if r[1]==52: raise OSError("Too few args!")
            if r[1]==53: raise OSError("Too many args!")
            if r[1]==54: raise OSError("Unknown variable or option!")
            if r[1]==55: raise OSError("Invalid argument!")
            if r[1]==56: raise OSError("Timeout!")
            if r[1]==57: raise OSError("Security mismatch!")
            if r[1]!=48: raise OSError("Response corrupted!")
            for i in range(2,6):
                if r[i]<48 or 57<r[i]: raise OSError("Response corrupted!")
            if r[7]!=13 or r[8]!=10: raise OSError("Response corrupted!")
            l=((r[2]-48)*10000)+\
              ((r[3]-48)*1000)+\
              ((r[4]-48)*100)+\
              ((r[5]-48)*10)+\
              ((r[6]-48)*1)
            if not l: return None
            if l==1 or l==2: raise OSError("Response corrupted!")
            response=self.uart.read(l-2)
            if self.uart.readchar()!=13: raise OSError("Response corrupted!")
            if self.uart.readchar()!=10: raise OSError("Response corrupted!")
            return response

    def deinit(self):
        if self.type==self.BLE_SHIELD:
            self.uart.deinit()
            self.rst=None
            self.uart=None
            self.type=self.BLE_NONE

    def init(self, type=BLE_SHIELD):
        self.deinit()
        if type==self.BLE_SHIELD:
            self.rst=Pin("P7",Pin.OUT_OD,Pin.PULL_NONE)
            self.uart=UART(3,115200,timeout_char=1000)
            self.type=self.BLE_SHIELD
            self.rst.low()
            sleep(100)
            self.rst.high()
            sleep(100)
            self.uart.write("set sy c m machine\r\nsave\r\nreboot\r\n")
            sleep(1000)
            self.uart.readall() # clear

    def uart(self):
        if self.type==self.BLE_SHIELD: return self.uart

    def type(self):
        if self.type==self.BLE_SHIELD: return self.BLE_SHIELD

    def __init__(self):
        self.rst=None
        self.uart=None
        self.type=self.BLE_NONE

if __name__=="__main__":
    ble=BLE()
    ble.init()
    print(ble.command("ver"))
Copyright 杭州云江科技有限公司 2017 all right reserved,powered by Gitbook该文件修订时间: 2018-04-02 09:53:12

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