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clocker.c
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// VERSION 1.1.1: Reversed orientation of Spread switch
// Version 1.1:--Added Spread Mode
/* Jumper/Breakout info
Open Short Pin# Variable_name
Up Down PD5 DOWNBEATMODE_JUMPER
Trig Gate PD4 GATEMODE_JUMPER
Div32 Div8 PC2 DIVIDEBY32_SWITCH
Div16 Div8 PC3 DIVIDEBY16_SWITCH
off Sprd PC4 SPREADMODE_SWITCH
off Rst16 PC5 AUTO_RESET_SWITCH
*/
#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdarg.h>
#include <ctype.h>
/** MODES **/
/** SETTINGS **/
/** PINS **/
#define CLOCK_IN_pin PD2
#define CLOCK_IN_init DDRD &= ~(1<<CLOCK_IN_pin)
#define CLOCK_IN (PIND & (1<<CLOCK_IN_pin))
#define CLOCK_LED_pin PD3
#define CLOCK_LED_init DDRD |=(1<<CLOCK_LED_pin)
#define CLOCK_LED_PORT PORTD
#define DOWNBEATMODE_pin PD5
#define DOWNBEATMODE_init DDRD &= ~(1<<DOWNBEATMODE_pin)
#define DOWNBEATMODE_init_pullup PORTD |= (1<<DOWNBEATMODE_pin)
#define DOWNBEATMODE_JUMPER (!(PIND & (1<<DOWNBEATMODE_pin)))
#define GATEMODE_pin PD4
#define GATEMODE_init DDRD &= ~(1<<GATEMODE_pin)
#define GATEMODE_init_pullup PORTD |= (1<<GATEMODE_pin)
#define GATEMODE_JUMPER (!(PIND & (1<<GATEMODE_pin)))
#define OUT_PORT1 PORTB
#define OUT_DDR1 DDRB
#define OUT_MASK1 0b00111111
#define OUT_init1 OUT_DDR1 |= OUT_MASK1
#define OUT_PORT2 PORTD
#define OUT_DDR2 DDRD
#define OUT_MASK2 0b11000000
#define OUT_init2 OUT_DDR2 |= OUT_MASK2
#define SWITCH_MASK 0b111100
#define SWITCH_PULLUP PORTC
#define SWITCH_PIN PINC
#define SWITCH_DDR DDRC
#define SWITCH_init SWITCH_DDR &= ~(SWITCH_MASK)
#define ADC_DDR DDRC
#define ADC_PORT PORTC
#define ADC_pin PC0
#define RESET_SWITCH (SWITCH_PIN & (1<<PC1))
#define DIVIDEBY32_SWITCH (SWITCH_PIN & (1<<PC2))
#define DIVIDEBY16_SWITCH (SWITCH_PIN & (1<<PC3))
#define SPREADMODE_SWITCH (!(SWITCH_PIN & (1<<PC4)))
#define AUTO_RESET_SWITCH (!(SWITCH_PIN & (1<<PC5)))
/** MACROS **/
#define ALLON(p,x) p &= ~(x)
#define ALLOFF(p,x) p |= (x)
#define ON(p,x) p &= ~(1<<(x))
#define OFF(p,x) p |= (1<<(x))
uint8_t rotate_table[8]= {0,1,2,3,5,7,11,15};
uint8_t divby(uint8_t rot_amt, uint8_t max_divby, uint8_t jack, uint8_t spread){
if (spread) {
if (max_divby==15) // /2 /4 /6 /8 /10 /12 /14 /16 rotating within 1-16
return ((((jack<<1)+1)+rot_amt) & 15);
else if (max_divby==31) // /4 /8 /12... /32 rotating within 1-32
return ((((jack<<2)+3)+rot_amt) & 31);
else if (max_divby==63) // /8 /16 /20.../64 rotating within 1-64
return ((((jack<<3)+7)+rot_amt) & 63);
else
return rotate_table[((jack+rot_amt) & 7)];
} else { //no spread, so jacks are 1...8 (or 1..16, etc depending on maxdivby)
return ((jack+rot_amt) & max_divby);
}
}
/** MAIN **/
int main(void){
uint8_t clock_up=0,clock_down=0, reset2_up=0,autoreset=0;
uint8_t o0=0,o1=0,o2=0,o3=0,o4=0,o5=0,o6=0,o7=0;
uint8_t div0=0,div1=1,div2=2,div3=3,div4=4,div5=5,div6=6,div7=7;
uint8_t adc=0,old_adc=0xFF;
uint8_t d=0;
uint8_t t=7;
uint8_t divideby16_switch=0, old_divideby16_switch=0xFF;
uint8_t divideby32_switch=0, old_divideby32_switch=0xFF;
uint8_t spreadmode_switch=0, old_spreadmode_switch=0xFF;;
uint8_t recalc_divs=1;
CLOCK_IN_init;
CLOCK_LED_init;
DOWNBEATMODE_init;
DOWNBEATMODE_init_pullup;
GATEMODE_init;
GATEMODE_init_pullup;
OUT_init1;
OUT_init2;
SWITCH_init;
SWITCH_PULLUP |= SWITCH_MASK; //turn pullups on
//init the ADC:
ADC_DDR &= ~(1<<ADC_pin); //adc input
ADC_PORT &= ~(1<<ADC_pin); //disable pullup
ADCSRA = (1<<ADEN); //Enable ADC
ADMUX = (1<<ADLAR); //Left-Adjust
ADCSRA |= (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
ADCSRA |= (1<<ADSC); //set the Start Conversion Flag in the ADC Status Register
while(1){
/** READ ADC **/
while( !(ADCSRA & (1<<ADIF)) );
ADCSRA |= (1<<ADIF); // Clear the flag by sending a logical "1"
adc=ADCH;
ADCSRA |= (1<<ADSC); //set the Start Conversion Flag in the ADC Status Register
if (adc!=old_adc){
old_adc=adc;
recalc_divs=1;
}
/** READ SWITCHES **/
divideby16_switch=DIVIDEBY16_SWITCH;
divideby32_switch=DIVIDEBY32_SWITCH;
spreadmode_switch=SPREADMODE_SWITCH;
if (divideby16_switch!=old_divideby16_switch){
old_divideby16_switch=divideby16_switch;
recalc_divs=1;
}
if (divideby32_switch!=old_divideby32_switch){
old_divideby32_switch=divideby32_switch;
recalc_divs=1;
}
if (spreadmode_switch!=old_spreadmode_switch){
old_spreadmode_switch=spreadmode_switch;
recalc_divs=1;
}
if (RESET_SWITCH) {
if (reset2_up==0){
reset2_up=1;
o0=0;o1=0;o2=0;o3=0;o4=0;o5=0;o6=0;o7=0;
}
} else reset2_up=0;
/** RECALCULATE THE DIVIDEBY AMOUNTS FOR EACH JACK (if necessary) **/
if (recalc_divs){
recalc_divs=0;
if (spreadmode_switch){
if (divideby16_switch){
if (divideby32_switch){
t=63;
d=adc>>2; //0..63
} else {
t=15;
d=adc>>4; //0..15
}
} else {
if (divideby32_switch){
t=31;
d=adc>>3; //0..31
} else {
t=7;
d=adc>>5; //0..7 (/1-/8)
}
}
} else {
if (divideby16_switch){
if (divideby32_switch){
t=63;
d=(adc>>3)+32; //31..95 masked by 63 gives 31-63,0-30 (/32-/64,/1-/31)
} else {
t=15;
d=(adc>>4)+8; //8...23 masked by 15 gives 8-15,0-7 (/9-/16,/1-/8)
}
} else {
if (divideby32_switch){
t=31;
d=(adc>>3)+16; //16..47 masked by 31 gives 16-31,0-15 (/17-/32,/1-/16)
} else {
t=7;
d=adc>>5; //0..7 (/1-/8)
}
}
}
div0=divby(d,t,0,spreadmode_switch);
div1=divby(d,t,1,spreadmode_switch);
div2=divby(d,t,2,spreadmode_switch);
div3=divby(d,t,3,spreadmode_switch);
div4=divby(d,t,4,spreadmode_switch);
div5=divby(d,t,5,spreadmode_switch);
div6=divby(d,t,6,spreadmode_switch);
div7=divby(d,t,7,spreadmode_switch);
}
if (CLOCK_IN){
clock_down=0;
if (!clock_up){
clock_up=1;//rising edge only
ON(CLOCK_LED_PORT,CLOCK_LED_pin);
if (DOWNBEATMODE_JUMPER){
if (o0==0) ON(OUT_PORT1,0);
if (o1==0) ON(OUT_PORT1,1);
if (o2==0) ON(OUT_PORT1,2);
if (o3==0) ON(OUT_PORT1,3);
if (o4==0) ON(OUT_PORT1,4);
if (o5==0) ON(OUT_PORT1,5);
if (o6==0) ON(OUT_PORT2,7);
if (o7==0) ON(OUT_PORT2,6);
if (GATEMODE_JUMPER){
if (o0==((div0>>1)+1)) OFF(OUT_PORT1,0);
if (o1==((div1>>1)+1)) OFF(OUT_PORT1,1);
if (o2==((div2>>1)+1)) OFF(OUT_PORT1,2);
if (o3==((div3>>1)+1)) OFF(OUT_PORT1,3);
if (o4==((div4>>1)+1)) OFF(OUT_PORT1,4);
if (o5==((div5>>1)+1)) OFF(OUT_PORT1,5);
if (o6==((div6>>1)+1)) OFF(OUT_PORT2,7);
if (o7==((div7>>1)+1)) OFF(OUT_PORT2,6);
} else {
if (++o0>div0) o0=0;
if (++o1>div1) o1=0;
if (++o2>div2) o2=0;
if (++o3>div3) o3=0;
if (++o4>div4) o4=0;
if (++o5>div5) o5=0;
if (++o6>div6) o6=0;
if (++o7>div7) o7=0;
}
} else { //DOWNBEAT is off (upbeat)
if (GATEMODE_JUMPER){
if (o0==((div0>>1)+1)) ON(OUT_PORT1,0);
if (o1==((div1>>1)+1)) ON(OUT_PORT1,1);
if (o2==((div2>>1)+1)) ON(OUT_PORT1,2);
if (o3==((div3>>1)+1)) ON(OUT_PORT1,3);
if (o4==((div4>>1)+1)) ON(OUT_PORT1,4);
if (o5==((div5>>1)+1)) ON(OUT_PORT1,5);
if (o6==((div6>>1)+1)) ON(OUT_PORT2,7);
if (o7==((div7>>1)+1)) ON(OUT_PORT2,6);
if (o0==0) OFF(OUT_PORT1,0);
if (o1==0) OFF(OUT_PORT1,1);
if (o2==0) OFF(OUT_PORT1,2);
if (o3==0) OFF(OUT_PORT1,3);
if (o4==0) OFF(OUT_PORT1,4);
if (o5==0) OFF(OUT_PORT1,5);
if (o6==0) OFF(OUT_PORT2,7);
if (o7==0) OFF(OUT_PORT2,6);
} else {
if (++o0>div0){ o0=0;ON(OUT_PORT1,0);}
if (++o1>div1){ o1=0;ON(OUT_PORT1,1);}
if (++o2>div2){ o2=0;ON(OUT_PORT1,2);}
if (++o3>div3){ o3=0;ON(OUT_PORT1,3);}
if (++o4>div4){ o4=0;ON(OUT_PORT1,4);}
if (++o5>div5){ o5=0;ON(OUT_PORT1,5);}
if (++o6>div6){ o6=0;ON(OUT_PORT2,7);}
if (++o7>div7){ o7=0;ON(OUT_PORT2,6);}
}
}
if (AUTO_RESET_SWITCH){
//(t+1)*2: 16, 32, 64, 128
if (++autoreset>=((t+1)*2)){
autoreset=0;
o0=0;o1=0;o2=0;o3=0;o4=0;o5=0;o6=0;o7=0;
}
}
}
}else{
clock_up=0;
if (!clock_down){
clock_down=1;//rising edge only
OFF(CLOCK_LED_PORT,CLOCK_LED_pin);
if (GATEMODE_JUMPER){
if (DOWNBEATMODE_JUMPER){
if (o0==((div0+1)>>1)) OFF(OUT_PORT1,0);
if (o1==((div1+1)>>1)) OFF(OUT_PORT1,1);
if (o2==((div2+1)>>1)) OFF(OUT_PORT1,2);
if (o3==((div3+1)>>1)) OFF(OUT_PORT1,3);
if (o4==((div4+1)>>1)) OFF(OUT_PORT1,4);
if (o5==((div5+1)>>1)) OFF(OUT_PORT1,5);
if (o6==((div6+1)>>1)) OFF(OUT_PORT2,7);
if (o7==((div7+1)>>1)) OFF(OUT_PORT2,6);
} else {
if (o0==((div0+1)>>1)) ON(OUT_PORT1,0);
if (o1==((div1+1)>>1)) ON(OUT_PORT1,1);
if (o2==((div2+1)>>1)) ON(OUT_PORT1,2);
if (o3==((div3+1)>>1)) ON(OUT_PORT1,3);
if (o4==((div4+1)>>1)) ON(OUT_PORT1,4);
if (o5==((div5+1)>>1)) ON(OUT_PORT1,5);
if (o6==((div6+1)>>1)) ON(OUT_PORT2,7);
if (o7==((div7+1)>>1)) ON(OUT_PORT2,6);
}
if (++o0>div0){ o0=0;}
if (++o1>div1){ o1=0;}
if (++o2>div2){ o2=0;}
if (++o3>div3){ o3=0;}
if (++o4>div4){ o4=0;}
if (++o5>div5){ o5=0;}
if (++o6>div6){ o6=0;}
if (++o7>div7){ o7=0;}
} else {
ALLOFF(OUT_PORT1,OUT_MASK1);
ALLOFF(OUT_PORT2,OUT_MASK2);
}
}
}
} //endless loop
return(1);
}