Renesas M16C/62P Group

Rev.1.00 2007.11.1

REC10B0002-0100

__ReadIOPortRegister

Synopsis <Read from I/O port register>

Boolean __ReadIOPortRegister(unsigned long data1, unsigned int *data2)

data1 Setup data 1

data2 Pointer to the variable in which the value read from I/O port register is stored.

Description Gets the value of a specified I/O port from each relevant register.

[data1]

Specify an I/O port register from which data is read. The definition values

corresponding to each I/O port register are listed below.

RAPI_PORT_0 Port P0 register RAPI_PORT_1 Port P1 register

RAPI_PORT_2 Port P2 register RAPI_PORT_3 Port P3 register

RAPI_PORT_4 Port P4 register RAPI_PORT_5 Port P5 register

RAPI_PORT_6 Port P6 register RAPI_PORT_7 Port P7 register

RAPI_PORT_8 Port P8 register RAPI_PORT_9 Port P9 register

RAPI_PORT_10 Port P10 register RAPI_PORT_11 Port P11 register

RAPI_PORT_12 Port P12 register RAPI_PORT_13 Port P13 register

RAPI_PORT_14 Port P14 register

Return value

If the I/O port register specification is incorrect, RAPI_FALSE is returned; otherwise,

RAPI_TRUE is returned.

Functionality I/O port

Reference __SetIOPort, __ReadIOPort, __WriteIOPort, __SetIOPortRegister,

__WriteIOPortRegister

Remark • If an undefined value is specified in the first argument, operation of the API cannot

be guaranteed.

Program example

#include " rapi_io_port_m16c_62p.h"

void func( void )

{

unsigned int data;

/* Get the value of port P1 register */

__ReadIOPortRegister( RAPI_PORT_1, &data );

}