MCP2200 datasheet(14/34 Pages) MICROCHIP

14 / 34 page

MCP2200

DS22228A-page 14

 2010 Microchip Technology Inc.

Returns:

true if the pin was successfully read.

false if the pin was not read (not

configued as an input).

Example:

<code>

unsigned int rv;

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

{

lblStatusBar->Text = "Success";

}

else

lblStatusBar->Text = "Invalid command

" +

SimpleIOClass::LastError;

</code>

2.3.1.17

WritePort

bool SimpleIOClass::WritePort(unsigned int

portValue)

Summary:

Writes a value to the GPIO port.

Description:

Writes the GPIO port.

This provides a means

to write all pins at once instead of one-at-

a-time.

Precondition:

Must have previously been configured as an

output via a ConfigureGPIO call.

Parameters:

portValue - Byte value to set on the port.

Returns:

Function returns true if the transmission is

successful

returns False if there the transmission

fails.

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.

2.3.1.18

ReadPort

bool SimpleIOClass::ReadPort(unsigned int

*returnvalue)

Summary:

Reads the GPIO port as digital input.

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.

Precondition:

Must have previously been configured as an

input via a ConfigureGPIO call.

Parameters:

returnvalue - the value read on the port.

Returns:

Function returns true if the read is

successful

returns False if there the transmission

fails.

Example:

<code>

unsigned int rv;

if (SimpleIOClass::ReadGPIOPort (&rv))

{

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.

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