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/*
************************************************************************
* HardwareSerial.cpp
*
* Arduino core files for MSP430
* Copyright (c) 2012 Robert Wessels. All right reserved.
*
*
***********************************************************************
Derived from:
wiring_digital.c - digital input and output functions
Part of Arduino - http://www.arduino.cc/
Copyright (c) 2005-2006 David A. Mellis
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
#define ARDUINO_MAIN
#include "wiring_private.h"
#include "pins_energia.h"
void pinMode(uint8_t pin, uint8_t mode)
{
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
volatile uint8_t *dir;
volatile uint8_t *ren;
volatile uint8_t *out;
if (port == NOT_A_PORT) return;
dir = portDirRegister(port);
ren = portRenRegister(port);
out = portOutputRegister(port);
if (mode == INPUT) {
*dir &= ~bit;
} else if (mode == INPUT_PULLUP) {
*dir &= ~bit;
*out |= bit;
*ren |= bit;
} else if (mode == INPUT_PULLDOWN) {
*dir &= ~bit;
*out &= ~bit;
*ren |= bit;
} else {
*dir |= bit;
}
}
void pinMode_int(uint8_t pin, uint8_t mode)
{
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
volatile uint8_t *dir;
volatile uint8_t *ren;
volatile uint8_t *out;
volatile uint8_t *sel;
if (port == NOT_A_PORT) return;
dir = portDirRegister(port);
ren = portRenRegister(port);
out = portOutputRegister(port);
if (mode & OUTPUT) {
*dir |= bit;
} else {
*dir &= ~bit;
if (mode & INPUT_PULLUP) {
*out |= bit;
*ren |= bit;
} else if (mode & INPUT_PULLDOWN) {
*out &= ~bit;
*ren |= bit;
}
}
#if (defined(P1SEL_) || defined(P1SEL))
sel = portSel0Register(port); /* get the port function select register address */
if (mode & PORT_SELECTION0) {
*sel |= bit;
} else {
*sel &= ~bit;
}
#if (defined(P1SEL2_) || defined(P1SEL2))
sel = portSel2Register(port); /* get the port function select register address */
if (mode & PORT_SELECTION1) {
*sel |= bit;
} else {
*sel &= ~bit;
}
#endif
#endif
#if (defined(P1SEL0_) || defined(P1SEL0))
sel = portSel0Register(port); /* get the port function select register address */
if (mode & PORT_SELECTION0) {
*sel |= bit;
} else {
*sel &= ~bit;
}
#if (defined(P1SEL1_) || defined(P1SEL1))
sel = portSel1Register(port); /* get the port function select register address */
if (mode & PORT_SELECTION1) {
*sel |= bit;
} else {
*sel &= ~bit;
}
#endif
#endif
}
int digitalRead(uint8_t pin)
{
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
if (port == NOT_A_PORT) return LOW;
if (*portInputRegister(port) & bit) return HIGH;
return LOW;
}
void digitalWrite(uint8_t pin, uint8_t val)
{
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
volatile uint8_t *out;
volatile uint8_t *sel;
if (port == NOT_A_PORT) return;
/*
* Clear bit in PxSEL register to select GPIO function. Other functions like analogWrite(...)
* will set this bit so need to clear it.
*/
#if (defined(P1SEL_) || defined(P1SEL))
sel = portSel0Register(port); /* get the port function select register address */
*sel &= ~bit; /* clear bit in pin function select register */
#if (defined(P1SEL2_) || defined(P1SEL2))
sel = portSel2Register(port); /* get the port function select register address */
*sel &= ~bit; /* clear bit in pin function select register */
#endif
#endif
#if (defined(P1SEL0_) || defined(P1SEL0))
sel = portSel0Register(port); /* get the port function select register address */
*sel &= ~bit; /* clear bit in pin function select register */
#if (defined(P1SEL1_) || defined(P1SEL1))
sel = portSel1Register(port); /* get the port function select register address */
*sel &= ~bit; /* clear bit in pin function select register */
#endif
#endif
out = portOutputRegister(port);
if (val == LOW) {
*out &= ~bit;
} else {
*out |= bit;
}
}
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