Datasheet

 2011 Microchip Technology Inc. DS22228B-page 13
MCP2200
2.3.1.2 ConfigureIO
Function:
bool SimpleIOClass::ConfigureIO (unsigned char IOMap)
EXAMPLE 2-2:
2.3.1.3 ConfigureIoDefaultOutput
Function:
bool SimpleIOClass::ConfigureIoDefaultOutput (unsigned char ucIoMap, unsigned char ucDefValue)
EXAMPLE 2-3:
Summary: Configures the GPIO pins for Digital Input, Digital Output.
Description: GPIO Pins can be configured as Digital Input, Digital Output.
Precondition: VID and PID must be previously set via a call to
InitMCP2200(VID, PID).
Parameters:
IOMap - a byte that represents a bitmap of the GPIO configuration:
• a bit set to ‘
1’ will be a digital input
• a bit set to ‘
0’ will be a digital output
• MSB – – – – – – LSB
GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0
Returns: This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks: Error code is returned in LastError.
Summary: Configures the IO pins for Digital Input, Digital Output and also the default output latch value.
Description: IO Pins can be configured as Digital Input, Digital Output. The default output latch value is received
as a parameter.
Precondition: VID and PID must be previously set via a call to
InitMCP2200(VID, PID).
Parameters:
1. ucIoMap - a byte that represents a bitmap used to set the GPIOs as either input or output.
•‘1’ configures GPIO as input
•‘0’ configures GPIO as output
• MSB – – – – – – LSB
GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0
2.
ucDefValue - the default value that will be loaded to the output latch (affects only the pins configured as
outputs).
Returns: This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks: Error code is returned in
LastError.
if (SimpleIOClass::ConfigureIO(0xA5) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
if (SimpleIOClass::ConfigureIoDefaultOutput(IoMap, DefValue) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;