MCP2200
EXAMPLE 2-16:
unsigned int rv;
if (SimpleIOClass::IsConnected ())
{
lblStatusBar->Text = “Device connected”;
}
else
lblStatusBar->Text = “Device Disconnected”;
2.3.1.17
Function:
ReadEEPROM
int SimpleIOClass::ReadEEPROM (unsigned int uiEEPAddress)
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
None.
Remarks:
EXAMPLE 2-17:
int iRetValue = SimpleIOClass::ReadEEPROM(0x01);
if (iRetValue >= 0)
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Error reading to EEPROM” + SimpleIOClass::LastError;
2.3.1.18
Function:
ReadPin
bool SimpleIOClass::ReadPin (unsigned int pin, unsigned int *returnvalue)
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 ConfigureIOcall.
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.
None.
Remarks:
EXAMPLE 2-18:
unsigned int rv;
if (SimpleIOClass::ReadGPIOn (0, &rv))
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
2011 Microchip Technology Inc.
DS22228B-page 19
MICROCHIP [ MICROCHIP ]
