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// Adafruit Motor shield library
// copyright Adafruit Industries LLC, 2009
// this code is public domain, enjoy!
#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include <avr/io.h>
#include "AFMotor.h"
static uint8_t latch_state;
#define MICROSTEPS 16 // 8, 16 & 32 are popular
//#define MOTORDEBUG 1
AFMotorController::AFMotorController(void) {
}
void AFMotorController::enable(void) {
// setup the latch
/*
LATCH_DDR |= _BV(LATCH);
ENABLE_DDR |= _BV(ENABLE);
CLK_DDR |= _BV(CLK);
SER_DDR |= _BV(SER);
*/
pinMode(MOTORLATCH, OUTPUT);
pinMode(MOTORENABLE, OUTPUT);
pinMode(MOTORDATA, OUTPUT);
pinMode(MOTORCLK, OUTPUT);
latch_state = 0;
latch_tx(); // "reset"
//ENABLE_PORT &= ~_BV(ENABLE); // enable the chip outputs!
digitalWrite(MOTORENABLE, LOW);
}
void AFMotorController::latch_tx(void) {
uint8_t i;
//LATCH_PORT &= ~_BV(LATCH);
digitalWrite(MOTORLATCH, LOW);
//SER_PORT &= ~_BV(SER);
digitalWrite(MOTORDATA, LOW);
for (i=0; i<8; i++) {
//CLK_PORT &= ~_BV(CLK);
digitalWrite(MOTORCLK, LOW);
if (latch_state & _BV(7-i)) {
//SER_PORT |= _BV(SER);
digitalWrite(MOTORDATA, HIGH);
} else {
//SER_PORT &= ~_BV(SER);
digitalWrite(MOTORDATA, LOW);
}
//CLK_PORT |= _BV(CLK);
digitalWrite(MOTORCLK, HIGH);
}
//LATCH_PORT |= _BV(LATCH);
digitalWrite(MOTORLATCH, HIGH);
}
static AFMotorController MC;
/******************************************
MOTORS
******************************************/
inline void initPWM1(uint8_t freq) {
#if defined(__AVR_ATmega8__) || \
defined(__AVR_ATmega48__) || \
defined(__AVR_ATmega88__) || \
defined(__AVR_ATmega168__) || \
defined(__AVR_ATmega328P__)
// use PWM from timer2A on PB3 (Arduino pin #11)
TCCR2A |= _BV(COM2A1) | _BV(WGM20) | _BV(WGM21); // fast PWM, turn on oc2a
TCCR2B = freq & 0x7;
OCR2A = 0;
#elif defined(__AVR_ATmega1280__)
// on arduino mega, pin 11 is now PB5 (OC1A)
TCCR1A |= _BV(COM1A1) | _BV(WGM10); // fast PWM, turn on oc1a
TCCR1B = (freq & 0x7) | _BV(WGM12);
OCR1A = 0;
#endif
pinMode(11, OUTPUT);
}
inline void setPWM1(uint8_t s) {
#if defined(__AVR_ATmega8__) || \
defined(__AVR_ATmega48__) || \
defined(__AVR_ATmega88__) || \
defined(__AVR_ATmega168__) || \
defined(__AVR_ATmega328P__)
// use PWM from timer2A on PB3 (Arduino pin #11)
OCR2A = s;
#elif defined(__AVR_ATmega1280__)
// on arduino mega, pin 11 is now PB5 (OC1A)
OCR1A = s;
#endif
}
inline void initPWM2(uint8_t freq) {
#if defined(__AVR_ATmega8__) || \
defined(__AVR_ATmega48__) || \
defined(__AVR_ATmega88__) || \
defined(__AVR_ATmega168__) || \
defined(__AVR_ATmega328P__)
// use PWM from timer2B (pin 3)
TCCR2A |= _BV(COM2B1) | _BV(WGM20) | _BV(WGM21); // fast PWM, turn on oc2b
TCCR2B = freq & 0x7;
OCR2B = 0;
#elif defined(__AVR_ATmega1280__)
// on arduino mega, pin 3 is now PE5 (OC3C)
TCCR3A |= _BV(COM1C1) | _BV(WGM10); // fast PWM, turn on oc3c
TCCR3B = (freq & 0x7) | _BV(WGM12);
OCR3C = 0;
#endif
pinMode(3, OUTPUT);
}
inline void setPWM2(uint8_t s) {
#if defined(__AVR_ATmega8__) || \
defined(__AVR_ATmega48__) || \
defined(__AVR_ATmega88__) || \
defined(__AVR_ATmega168__) || \
defined(__AVR_ATmega328P__)
// use PWM from timer2A on PB3 (Arduino pin #11)
OCR2B = s;
#elif defined(__AVR_ATmega1280__)
// on arduino mega, pin 11 is now PB5 (OC1A)
OCR3C = s;
#endif
}
inline void initPWM3(uint8_t freq) {
#if defined(__AVR_ATmega8__) || \
defined(__AVR_ATmega48__) || \
defined(__AVR_ATmega88__) || \
defined(__AVR_ATmega168__) || \
defined(__AVR_ATmega328P__)
// use PWM from timer0A / PD6 (pin 6)
TCCR0A |= _BV(COM0A1) | _BV(WGM00) | _BV(WGM01); // fast PWM, turn on OC0A
//TCCR0B = freq & 0x7;
OCR0A = 0;
#elif defined(__AVR_ATmega1280__)
// on arduino mega, pin 6 is now PH3 (OC4A)
TCCR4A |= _BV(COM1A1) | _BV(WGM10); // fast PWM, turn on oc4a
TCCR4B = (freq & 0x7) | _BV(WGM12);
//TCCR4B = 1 | _BV(WGM12);
OCR4A = 0;
#endif
pinMode(6, OUTPUT);
}
inline void setPWM3(uint8_t s) {
#if defined(__AVR_ATmega8__) || \
defined(__AVR_ATmega48__) || \
defined(__AVR_ATmega88__) || \
defined(__AVR_ATmega168__) || \
defined(__AVR_ATmega328P__)
// use PWM from timer0A on PB3 (Arduino pin #6)
OCR0A = s;
#elif defined(__AVR_ATmega1280__)
// on arduino mega, pin 6 is now PH3 (OC4A)
OCR4A = s;
#endif
}
inline void initPWM4(uint8_t freq) {
#if defined(__AVR_ATmega8__) || \
defined(__AVR_ATmega48__) || \
defined(__AVR_ATmega88__) || \
defined(__AVR_ATmega168__) || \
defined(__AVR_ATmega328P__)
// use PWM from timer0B / PD5 (pin 5)
TCCR0A |= _BV(COM0B1) | _BV(WGM00) | _BV(WGM01); // fast PWM, turn on oc0a
//TCCR0B = freq & 0x7;
OCR0B = 0;
#elif defined(__AVR_ATmega1280__)
// on arduino mega, pin 5 is now PE3 (OC3A)
TCCR3A |= _BV(COM1A1) | _BV(WGM10); // fast PWM, turn on oc3a
TCCR3B = (freq & 0x7) | _BV(WGM12);
//TCCR4B = 1 | _BV(WGM12);
OCR3A = 0;
#endif
pinMode(5, OUTPUT);
}
inline void setPWM4(uint8_t s) {
#if defined(__AVR_ATmega8__) || \
defined(__AVR_ATmega48__) || \
defined(__AVR_ATmega88__) || \
defined(__AVR_ATmega168__) || \
defined(__AVR_ATmega328P__)
// use PWM from timer0A on PB3 (Arduino pin #6)
OCR0B = s;
#elif defined(__AVR_ATmega1280__)
// on arduino mega, pin 6 is now PH3 (OC4A)
OCR3A = s;
#endif
}
AF_DCMotor::AF_DCMotor(uint8_t num, uint8_t freq) {
motornum = num;
pwmfreq = freq;
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