//#region USB to I2C Bridge
public static int Open() // Open USB to I2C bridge
{
int rtval;
byte powerbyte = 0;
uint currentbyte = 0;
byte[] FPins = new byte[4];
byte[] DPins = new byte[4];
byte[] VPins = new byte[4];
rtval = OpenbyIndex();
if (rtval == MCP2221.M_E_NO_ERR)
{
// Check is self power and wake on int is enabled
rtval = MCP2221.M_Mcp2221_GetUsbPowerAttributes(mHandle, ref powerbyte, ref currentbyte);
if ((powerbyte & (MCP2221.M_MCP2221_USB_SELF | MCP2221.M_MCP2221_USB_REMOTE)) != POWERCFG)
{
// Set self power and wake on int
rtval = rtval | MCP2221.M_Mcp2221_SetUsbPowerAttributes(mHandle, POWERCFG, currentbyte);
MCP2221.M_Mcp2221_Close(mHandle);
if (OpenbyIndex() != MCP2221.M_E_NO_ERR)
{
DeviceOpen = false;
MCP2221.M_Mcp2221_Reset(mHandle);
MCP2221.M_Mcp2221_CloseAll();
return(I2C_NO_BRIDGE);
}
}
//int test = MCP2221.M_Mcp2221_SetAdvancedCommParams(mHandle, 3, 10);
rtval = rtval | MCP2221.M_Mcp2221_GetGpioSettings(mHandle, SRAM, FPins, DPins, VPins);
bool isFPins = FPins.SequenceEqual(GPIOFNC);
bool isDpins = DPins.SequenceEqual(GPIODIR);
if ((isFPins == false) || (isDpins == false))
{
rtval = rtval | MCP2221.M_Mcp2221_SetGpioSettings(mHandle, FLASH, GPIOFNC, GPIODIR, GPIOVAL);
rtval = rtval | MCP2221.M_Mcp2221_SetGpioSettings(mHandle, SRAM, GPIOFNC, GPIODIR, GPIOVAL);
}
else
{
rtval = rtval | MCP2221.M_Mcp2221_SetGpioValues(mHandle, GPIOVAL);
}
rtval = rtval | MCP2221.M_Mcp2221_ClearInterruptPinFlag(mHandle);
if (rtval != MCP2221.M_E_NO_ERR)
{
MCP2221.M_Mcp2221_Reset(mHandle);
return(I2C_CFGERR);
}
DeviceOpen = true;
}
else
{
DeviceOpen = false;
return(I2C_NO_BRIDGE);
}
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);
}