串口驱动卸载/加载与 GSM 模块电源控制

直接上代码：
 1 // 串口驱动卸载/加载 COM13  
 2 BOOL UnloadDeviceDriver(CString csDeviceName)  
 3 {  
 4   BOOL bRet = FALSE;  
 5   HANDLE hFind = INVALID_HANDLE_VALUE;  
 6   if(csDeviceName.IsEmpty())  
 7   {  
 8     return FALSE;  
 9   }  
10   DevicedeviceType deviceType;  
11   if(CString(csDeviceName.Right(1)) == _T(":"))  
12   {  
13     deviceType = DeviceSearchByLegacyName;  
14   }  
15   else  
16   {  
17     deviceType = DeviceSearchByDeviceName;  
18   }  
19   DEVMGR_DEVICE_INFORMATION devInfo = {0};  
20   devInfo.dwSize = sizeof(devInfo);  
21   hFind = FindFirstDevice(deviceType,(LPCVOID)csDeviceName.GetBuffer(),&devInfo);  
22   if(hFind == INVALID_HANDLE_VALUE)  
23   {  
24     return FALSE;  
25   }  
26   bRet = DeactivateDevice(devInfo.hDevice);  
27   FindClose(hFind);  
28   return bRet;  
29 }  
30 BOOL LoadDeviceDriver(CString csDeviceName)  
31 {  
32   DWORD dwParam = 89;  
33   // ActivateDeviceEx(L"\Drivers\BuiltIn\Serial3",NULL,0,&dwParam);  
34    HANDLE hHd = ActivateDeviceEx(str.GetBuffer(),NULL,0,&dwParam);  
35   if(NULL == hHd)  
36   {  
37     DWORD dwError = GetLastError();  
38     printf("LoadDeviceDriver Error : %d",dwError);  
39   }  
40 }  
41 // 电源控制  
42 #define   VIDEOFUNDEVNAME   L"fun1:"   
43 #define SOFTI2C_IOCTL_TESTPIN 20  
44 #define GSM_POWER_CONTROL_BY_MCU  0  
45 BOOL GSM_Power_On(void)  
46 {  
47   BOOL bRet;  
48   BYTE ucPara[3];  
49   HANDLE hFun1 = INVALID_HANDLE_VALUE;  
50   ucPara[0] = 1;  
51   ucPara[1] = 0;  
52   ucPara[2] = 14;   
53   hFun1 = CreateFile(VIDEOFUNDEVNAME, GENERIC_WRITE|GENERIC_READ, 0, NULL, 0, 0, NULL);  
54   if(INVALID_HANDLE_VALUE == hFun1)  
55   {  
56     return FALSE;  
57   }  
58   bRet = DeviceIoControl(hFun1, SOFTI2C_IOCTL_TESTPIN, ucPara, 3, NULL, 0, NULL, NULL);   
59   if(!bRet)  
60   {  
61     RETAILMSG(1,(L"[Power_On]Device IO control failed: %d
",GetLastError()));  
62   }  
63   CloseHandle(hFun1);  
64   hFun1 = INVALID_HANDLE_VALUE;  
65   RETAILMSG(1,(L"
 open Gprs Power 
"));  
66   return bRet;  
67 }  
68 BOOL GSM_Power_Off(void)  
69 {  
70   BOOL bRet;  
71   BYTE ucPara[3];  
72   HANDLE hFun1 = INVALID_HANDLE_VALUE;  
73   ucPara[0] = 0;  
74   ucPara[1] = 0;  
75   ucPara[2] = 14;  
76   hFun1 = CreateFile(VIDEOFUNDEVNAME, GENERIC_WRITE|GENERIC_READ, 0, NULL, 0, 0, NULL);  
77   if(INVALID_HANDLE_VALUE == hFun1)  
78   {  
79     return FALSE;  
80   }  
81   bRet = DeviceIoControl(hFun1, SOFTI2C_IOCTL_TESTPIN, ucPara, 3, NULL, 0, NULL, NULL);   
82   if(!bRet)  
83   {  
84     RETAILMSG(1,(L"[Power_Off]Device IO control failed: %d
",GetLastError()));  
85   }  
86   CloseHandle(hFun1);  
87   hFun1 = INVALID_HANDLE_VALUE;  
88   RETAILMSG(1,(L"
 close Gprs Power 
"));  
89   return bRet;  
90 }