Hy
I am trying 2 build a controller for my parking heater with a attiny85 (digispark).
So far I got a encoder switch a i2c display and sensor working just fine, but now the flash memory is full.
I know about the 2 options to delete the bootloader or simply take a bigger chip (arduino nano already ordered to use as new controller or programmer for the 85 or both)
I am also thinking about writing parts of my program in assembler, but i am using the libraries TinyWire and LiquidChristal_attiny and scince my code contains mainly calls to these libraries and not much other code, i fear that writing my code in assembler wont help much but i realy would need to rewrite the libraries
. Is this correct or do you have any other ideas?
Thx
Here the code
#include <avr/io.h>
#include <util/delay.h>
#include <TinyWireM.h>
#include <LiquidCrystal_attiny.h>
#define LCD_ADDR 0x27
#define LCD_WIDTH 16
#define LCD_HEIGHT 2
#define TEMP_ADDR 0x40
#define ENC_A 1
#define ENC_B 4
#define OUT_1 3
#define OUT_2 5
#define delay_time 160 //in sec
#define delay_time_on 5 //in sec
#define menu_len 6
LiquidCrystal_I2C lcd(LCD_ADDR, LCD_WIDTH, LCD_HEIGHT); // set address & 16 chars / 2 lines
volatile int8_t enc_old = 2; //encoder state memory
volatile int8_t Enc_turn = 0; //how often encoder has been turned
volatile int8_t Enc_sw = 0; //if encoder has been pushed
int16_t temp=999; //ist-temp*10
uint8_t temp_retry=0,temp_state=0;
int16_t t_lim = 150, t_on=60,t_off=60; //soll-temp*10
uint8_t t_hyst=10;
uint8_t state=0; //0=ports off, 1=1 port on, 2= 2 ports on
volatile unsigned long t_activ=millis(); //time of last encoder state change
int8_t pos_m=1;
char* Menu[menu_len] = {"Exit ","Temp ", "OnTime ", "OffTime", "Repeat ", "Hyst. "};
uint8_t m_state[4]={1,0,0,0};
uint8_t i2c_w8(uint8_t addr,uint8_t data) //send i2c command
{ TinyWireM.beginTransmission(addr);
TinyWireM.send(data);
uint8_t r = TinyWireM.endTransmission();
return r;
};
static inline void initTimer(void)
{
TCCR1 |= (1 << CTC1); // clear timer on compare match
TCCR1 |= (1 << CS13) | (1 << CS12) | (1 << CS11) | (1 << CS10); //clock prescaler 8192
OCR1C = 1; // compare match value
TIMSK |= (1 << OCIE1A); // enable compare match interrupt
sei();
};
ISR(TIMER1_COMPA_vect) //timed interrupt to read encoder state
{
enc_old = (enc_old & 0b110000) | (enc_old & 0b11) << 2 | ((PINB >> ENC_A & 1) << 1) | (PINB >> ENC_B & 1);
if (enc_old == 0b001101)
{ Enc_turn++;
enc_old |= 0b010000;
t_activ=millis();
}
else if (enc_old == 0b001110 )
{ Enc_turn--;
enc_old |= 0b010000;
t_activ=millis();
}
else if (enc_old == 0b001100) {Enc_sw = 1;t_activ=millis();}
else if ((enc_old & 0b110011) == 0b010000) enc_old &= 0b001111;
};
void setup(void)
{ //TinyWireM.begin();
lcd.init();
lcd.backlight();
i2c_w8(TEMP_ADDR,0xFE); //sensor reset
DDRB|=1<<ENC_A+1<<ENC_B;
PORTB|=1<<ENC_A+1<<ENC_B;
initTimer();
};
void show_val(int16_t val,uint8_t dec,char* unit) //show int16 as float
{ uint8_t pos;
int8_t rval;
if (dec)
{ val=val/pow(10,dec);
rval=val%(int16_t)pow(10,dec);
};
if(val>99) pos=0;
else if (val>9) pos=1;
else pos=2;
if (val<0) { pos--; rval=-rval;};
while(pos--)
lcd.print(" ");
lcd.print(val);
if (dec)
{ lcd.print(".");
lcd.print(rval);
};
lcd.print(unit);
};
uint16_t set_val(int16_t val,uint8_t dec, uint8_t step,char* unit) //show and adjust a numerical value with encoder
{ while (true)
{ lcd.setCursor(4,1);
show_val(val,dec,unit);
if (Enc_sw)
{ Enc_sw=0;
return val;
}
else
{ val+=step*Enc_turn;
Enc_turn=0;
}
delay(100);
};
}
inline uint8_t measure() //read temperature sensor (call repeatedly until result)
{ uint8_t s;
temp_retry++;
if (temp_retry%20==0)
{ i2c_w8(TEMP_ADDR,0xFE); //reset
temp_state=0;};
if (temp_state==0)
{ i2c_w8(TEMP_ADDR,0xF3); //start measurement
temp_state=1;}
else temp_state=TinyWireM.requestFrom(TEMP_ADDR,2); //read temperature
if(!temp_state)
{ uint16_t hi=TinyWireM.receive()<<8;
hi+=TinyWireM.receive();
temp=(int16_t)(0.026813*hi-468.5);
temp_retry=0;
return 0;
}
else if(temp_retry>60)
{ temp=-999;
temp_state=0;
temp_retry=0;
return 2;};
return 1;
};
void show_tt() //display actual temperature, set temperature and timing
{ lcd.setCursor(0,0);
lcd.print((int)state);
lcd.print(" T");
show_val(temp,1,"");
if (m_state[0])
{ lcd.print(" >");
show_val(t_lim,1,"C");};
if (m_state[1])
{ lcd.setCursor(2,1);
lcd.print("t1");
show_val(t_on,0,"m");};
if (m_state[2])
{ lcd.setCursor(2,1);
lcd.print("t2");
show_val(t_on,0,"m");};
};
inline void set_state() //swich state/ports according to temperature
{ if (temp <= t_lim) state=1;
if (temp<=t_lim-t_hyst) state=2;
else if (temp>=t_lim+t_hyst) state=0;
//PORTB|=(PORTMASK&(state|state<<1));
}
void loop() {
measure();
show_tt();
set_state();
if(Enc_sw or Enc_turn) //if user input
{ Enc_sw=0;
if (pos_m<0) //if display was off, display on
{lcd.init(); lcd.backlight(); pos_m=0; }
else if(Enc_turn) //if encoder turned adjust temperatuer setting
{
t_lim+=5*Enc_turn;
Enc_turn=0;
}
else //if encoder pushed show menu
{ lcd.clear();
while (1)
{ lcd.setCursor(3, 0);
lcd.print(Menu[pos_m]); //show menu item in line 1
lcd.setCursor(13, 0);
if(pos_m>0 && pos_m<5)
{ if(m_state[pos_m-1] && pos_m<5) lcd.print(" On"); //show state of menu item
else lcd.print("Off");}
else lcd.print(" ");
lcd.setCursor(3, 1);
if(pos_m<menu_len-1) lcd.print(Menu[pos_m+1]); //show menu item of line 2
else lcd.print(" ");
delay(100);
if (Enc_sw) //if pushbutton execute menuitem
{ Enc_sw=0;
lcd.clear();
if(pos_m==0) break; //quit menu
else if (pos_m<5)
m_state[pos_m-1]^=1; //toggle options (temp mode, time mode,...)
else if(pos_m==5)
{ lcd.setCursor(13, 0); //adjust hysteresis
set_val(t_hyst,1,1,"C");
if(t_hyst<0) t_hyst=-t_hyst;}
Enc_turn=pos_m;
lcd.clear();
}
else //if Enc_turn is out of limits (number of menu itims)
{ pos_m=Enc_turn;
if (pos_m<0) pos_m=0;
else if (pos_m>menu_len-1) pos_m=menu_len-1;
}
Enc_turn=pos_m;
if(millis()-t_activ>5000) break; //
};
lcd.clear();
};
};
delay(100);
if(millis()-t_activ>20000) //backlight off if inactive
{ lcd.noBacklight();
lcd.init();
pos_m=-1;
};
};
