Skip to content

Update Cp21xxSerialDriver.cs: Get DSR, CTS, RI, CD #32

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
anotherlab merged 1 commit into from
Sep 13, 2022
Merged

Update Cp21xxSerialDriver.cs: Get DSR, CTS, RI, CD #32

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
27 changes: 23 additions & 4 deletions UsbSerialForAndroid/driver/Cp21xxSerialDriver.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,13 @@ public class Cp21xxSerialPort : CommonUsbSerialPort
private const int FLUSH_READ_CODE = 0x0a;
private const int FLUSH_WRITE_CODE = 0x05;

// https://developer.android.com/reference/android/hardware/usb/UsbConstants#USB_DIR_IN
private static int REQTYPE_DEVICE_TO_HOST = UsbConstants.UsbTypeVendor | 0; // UsbConstants.USB_DIR_IN;
private static int GET_MODEM_STATUS_REQUEST = 5;
private static int MODEM_STATUS_CTS = 0x10;
private static int MODEM_STATUS_DSR = 0x20;
private static int MODEM_STATUS_RI = 0x40;
private static int MODEM_STATUS_CD = 0x80;
/*
* SILABSER_IFC_ENABLE_REQUEST_CODE
*/
Expand Down Expand Up @@ -303,19 +310,31 @@ public override void SetParameters(int baudRate, int dataBits, StopBits stopBits
SetConfigSingle(SILABSER_SET_LINE_CTL_REQUEST_CODE, configDataBits);
}

private int GetStatus()
{
byte[] data = new byte[2];
int result = mConnection.ControlTransfer((UsbAddressing)REQTYPE_DEVICE_TO_HOST, GET_MODEM_STATUS_REQUEST,
0, mPortNumber + 1, data, data.Length, USB_WRITE_TIMEOUT_MILLIS);
if (result != 2)
{
throw new IOException("Get modem status failed: result=" + result);
}
return data[0];
}

public override bool GetCD()
{
return false;
return (GetStatus() & MODEM_STATUS_CD) != 0;
}

public override bool GetCTS()
{
return false;
return (GetStatus() & MODEM_STATUS_CTS) != 0;
}

public override bool GetDSR()
{
return false;
return (GetStatus() & MODEM_STATUS_DSR) != 0;
}

public override bool GetDTR()
Expand All @@ -329,7 +348,7 @@ public override void SetDTR(bool value)

public override bool GetRI()
{
return false;
return (GetStatus() & MODEM_STATUS_RI) != 0;
}

public override bool GetRTS()
Expand Down