MCP2200T-ISLASHSS datasheet(19/44 Pages) MICROCHIP

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DS20002228C-page 19

MCP2200

EXAMPLE 2-16:

2.3.1.17

ReadEEPROM

Function:

int SimpleIOClass::ReadEEPROM (unsigned int uiEEPAddress)

EXAMPLE 2-17:

2.3.1.18

ReadPin

Function:

bool SimpleIOClass::ReadPin (unsigned int pin, unsigned int *returnvalue)

EXAMPLE 2-18:

Summary:

Reads a byte from the EEPROM.

Description:

Reads a byte from the EEPROM at the given address.

Precondition:

At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible

devices. VID and PID must be previously set via a call to InitMCP2200(VID, PID).

Parameters:

uiEEPAddress

- the EEPROM address location we need to write to (must be from 0 to 255, inclu-

sively).

Returns:

This function returns any positive value as being the EEPROM’s location value:

• E_WRONG_ADDRESS (-3) - in case the given EEPROM address is out of range

• E_CANNOT_SEND_DATA (-4) - in case the function cannot send the command to the device

Remarks:

None.

Summary:

Reads the specified pin.

Description:

Reads the specified pin and returns the value in returnvalue. If the pin has been configured as a

digital input, the return value will be either ‘0’ or ‘1’.

Precondition:

Must be previously configured as an input via a ConfigureIO call.

VID and PID must be previously set via a call to InitMCP2200(VID, PID).

Parameters:

• pin - the pin number to set (0-7)

• returnvalue - the value read on the pin (‘0’ or ‘1’)

Returns:

This function returns True if the transmission is successful and returns False if the transmission fails.

Remarks:

None.

unsigned int rv;

if (SimpleIOClass::IsConnected ())

{

lblStatusBar->Text = “Device connected”;

}

else

lblStatusBar->Text = “Device Disconnected”;

int iRetValue = SimpleIOClass::ReadEEPROM(0x01);

if (iRetValue >= 0)

{

lblStatusBar->Text = “Success”;

}

else

lblStatusBar->Text = “Error reading to EEPROM” +

SimpleIOClass::LastError;

unsigned int rv;

if (SimpleIOClass::ReadGPIOn (0, &rv))

{

lblStatusBar->Text = “Success”;

}

else

lblStatusBar->Text = “Invalid command ” +

SimpleIOClass::LastError;

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