MCP2200
Returns:
2.3.1.18
ReadPort
true if the pin was successfully read.
false if the pin was not read (not
configued as an input).
bool SimpleIOClass::ReadPort(unsigned int
*returnvalue)
Summary:
Example:
Reads the GPIO port as digital input.
<code>
unsigned int rv;
if (SimpleIOClass::ReadGPIOn (0, &rv))
Description:
Reads the GPIO port and returns the value in
returnvalue. This provides a means to read
all pins at once instead of one-at-a-time.
{
lblStatusBar->Text = "Success";
}
else
Precondition:
Must have previously been configured as an
input via a ConfigureGPIO call.
lblStatusBar->Text = "Invalid command
" + SimpleIOClass::LastError;
</code>
Parameters:
returnvalue - the value read on the port.
2.3.1.17
WritePort
bool SimpleIOClass::WritePort(unsigned int
portValue)
Returns:
Function returns true if the read is
Summary:
successful
Writes a value to the GPIO port.
returns False if there the transmission
fails.
Description:
Writes the GPIO port. This provides a means
to write all pins at once instead of one-at-
a-time.
Example:
<code>
unsigned int rv;
if (SimpleIOClass::ReadGPIOPort (&rv))
Precondition:
{
Must have previously been configured as an
output via a ConfigureGPIO call.
lblStatusBar->Text = "Success";
}
else
Parameters:
portValue - Byte value to set on the port.
lblStatusBar->Text = "Invalid command
" + SimpleIOClass::LastError;
</code>
Returns:
Function returns true if the transmission is
Remarks:
successful
returns False if there the transmission
fails.
Pins configured for output returns the
current state of the port.
Pins configured as input read as zero.
Example:
<code>
if (SimpleIOClass::WritePort (0x5A))
{
lblStatusBar->Text = "Success";
}
else
lblStatusBar->Text = "Invalid command
" + SimpleIOClass::LastError;
</code>
Remarks:
Pins configured for output returns the
current state of the port.
Pins configured as input read as zero.
DS22228A-page 14
2010 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
