Status Code Documentation

DEVICE_STATUS Enum Values

Definition	Description
DEVICE_STATUS_UNKNOWN (0)	Device status unknown, initial state
DEVICE_STATUS_READY (1)	Device ready, initialization complete
DEVICE_STATUS_ERROR (2)	Device error, initialization failed

Error Code Documentation

Driver Loading Errors

Error Code	Description	Solution
0x0001	Driver file not found	Check driver file path
0x0002	Invalid driver signature	Verify driver signature
0x0003	Driver version mismatch	Update driver version
0x0004	System not supported	Check system version

Device Operation Errors

Error Code	Description	Solution
0x0101	Device not ready	Check device status
0x0102	Device busy	Wait for device idle
0x0103	Device not connected	Check device connection
0x0104	Device response timeout	Check device status

Parameter Errors

Error Code	Description	Solution
0x0201	Invalid parameter	Check parameter value
0x0202	Parameter out of range	Adjust parameter range
0x0203	Parameter type mismatch	Check parameter type
0x0204	Missing parameter	Add required parameter

System Errors

Error Code	Description	Solution
0x0301	Insufficient memory	Free system resources
0x0302	Insufficient system resources	Check system resources
0x0303	Insufficient privileges	Check user permissions
0x0304	System not supported	Check system requirements

Status Checking

Driver Status Check

DEVICE_STATUS status = GetDriverStatus();
switch (status) {
    case DEVICE_STATUS_UNKNOWN:
        // Device not initialized
        break;
    case DEVICE_STATUS_READY:
        // Device ready
        break;
    case DEVICE_STATUS_ERROR:
        // Device error
        break;
}

Error Handling

// Get error code
DWORD error = GetLastError();

// Handle error
if (error != 0) {
    // Error handling logic
    switch (error) {
        case 0x0001:
            // Handle driver file not found error
            break;
        case 0x0002:
            // Handle invalid driver signature error
            break;
        // ... other error handling
    }
}

Debugging Tips

Status Monitoring

• Check device status regularly
• Record status changes
• Analyze error causes

Error Recovery

• Implement error retry mechanism
• Provide error recovery solutions
• Log error information

Performance Optimization

• Avoid frequent status checks
• Optimize error handling process
• Set reasonable timeout values