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Diffstat (limited to 'targets/arduino/wiring_digital.c')
-rwxr-xr-x | targets/arduino/wiring_digital.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/targets/arduino/wiring_digital.c b/targets/arduino/wiring_digital.c deleted file mode 100755 index f38b2e1..0000000 --- a/targets/arduino/wiring_digital.c +++ /dev/null @@ -1,99 +0,0 @@ -/* - 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 - - $Id: wiring.c 248 2007-02-03 15:36:30Z mellis $ -*/ - -#include "wiring_private.h" -#include "pins_arduino.h" - -void pinMode(uint8_t pin, uint8_t mode) -{ - uint8_t bit = digitalPinToBitMask(pin); - uint8_t port = digitalPinToPort(pin); - volatile uint8_t *reg; - - if (port == NOT_A_PIN) return; - - // JWS: can I let the optimizer do this? - reg = portModeRegister(port); - - if (mode == INPUT) *reg &= ~bit; - else *reg |= bit; -} - -// Forcing this inline keeps the callers from having to push their own stuff -// on the stack. It is a good performance win and only takes 1 more byte per -// user than calling. (It will take more bytes on the 168.) -// -// But shouldn't this be moved into pinMode? Seems silly to check and do on -// each digitalread or write. -// -static inline void turnOffPWM(uint8_t timer) __attribute__ ((always_inline)); -static inline void turnOffPWM(uint8_t timer) -{ - if (timer == TIMER1A) cbi(TCCR1A, COM1A1); - if (timer == TIMER1B) cbi(TCCR1A, COM1B1); - -#if defined(__AVR_ATmega168__) - if (timer == TIMER0A) cbi(TCCR0A, COM0A1); - if (timer == TIMER0B) cbi(TCCR0A, COM0B1); - if (timer == TIMER2A) cbi(TCCR2A, COM2A1); - if (timer == TIMER2B) cbi(TCCR2A, COM2B1); -#else - if (timer == TIMER2) cbi(TCCR2, COM21); -#endif -} - -void digitalWrite(uint8_t pin, uint8_t val) -{ - uint8_t timer = digitalPinToTimer(pin); - uint8_t bit = digitalPinToBitMask(pin); - uint8_t port = digitalPinToPort(pin); - volatile uint8_t *out; - - if (port == NOT_A_PIN) return; - - // If the pin that support PWM output, we need to turn it off - // before doing a digital write. - if (timer != NOT_ON_TIMER) turnOffPWM(timer); - - out = portOutputRegister(port); - - if (val == LOW) *out &= ~bit; - else *out |= bit; -} - -int digitalRead(uint8_t pin) -{ - uint8_t timer = digitalPinToTimer(pin); - uint8_t bit = digitalPinToBitMask(pin); - uint8_t port = digitalPinToPort(pin); - - if (port == NOT_A_PIN) return LOW; - - // If the pin that support PWM output, we need to turn it off - // before getting a digital reading. - if (timer != NOT_ON_TIMER) turnOffPWM(timer); - - if (*portInputRegister(port) & bit) return HIGH; - return LOW; -} |