public static int I2CSpeed(uint value)
{
lock (locker)
{
if ((value <= MAXI2CSPEED) && (value >= MINI2CSPEED) && DeviceOpen)
{
int rtval = MCP2221.M_Mcp2221_SetSpeed(mHandle, value);
if (rtval != MCP2221.M_E_NO_ERR)
{
return(I2C_BAD_SETSPEED);
}
}
return(I2C_NO_ERROR);
}
}
private static int OpenbyIndex()
{
int rtval;
uint nDev = 0;
DeviceInfo.LibraryVersion = MCP2221.M_Mcp2221_GetLibraryVersion();
rtval = MCP2221.M_Mcp2221_GetConnectedDevices(vid, pid, ref nDev);
if (rtval == MCP2221.M_E_NO_ERR)
{
mHandle = MCP2221.M_Mcp2221_OpenByIndex(vid, pid, nDev - 1);
rtval = MCP2221.M_Mcp2221_GetLastError();
if (rtval == MCP2221.M_E_NO_ERR)
{
DeviceInfo.Manufacture = MCP2221.M_Mcp2221_GetManufacturerDescriptor(mHandle);
DeviceInfo.Product = MCP2221.M_Mcp2221_GetProductDescriptor(mHandle);
DeviceInfo.Serial = MCP2221.M_Mcp2221_GetSerialNumberDescriptor(mHandle);
DeviceInfo.FactorySN = MCP2221.M_Mcp2221_GetFactorySerialNumber(mHandle);
DeviceInfo.HardwareVer = MCP2221.M_Mcp2221_GetHardwareRevision(mHandle);
DeviceInfo.FirmwareRev = MCP2221.M_Mcp2221_GetFirmwareRevision(mHandle);
rtval = MCP2221.M_Mcp2221_GetLastError();
if (rtval == MCP2221.M_E_NO_ERR)
{
int rval = MCP2221.M_Mcp2221_SetSpeed(mHandle, i2cspeed);
int loop = 100;
while (rval != MCP2221.M_E_NO_ERR)
{
MCP2221.M_Mcp2221_I2cCancelCurrentTransfer(mHandle);
MCP2221.M_Mcp2221_Reset(mHandle);
MCP2221.M_Mcp2221_GetConnectedDevices(vid, pid, ref nDev);
mHandle = MCP2221.M_Mcp2221_OpenByIndex(vid, pid, nDev - 1);
rval = MCP2221.M_Mcp2221_SetSpeed(mHandle, i2cspeed);
loop--;
if (loop == 0)
{
break;
}
}
}
}
}
return(rtval);
}
