changes ...

main.c

@@ -22,6 +22,7 @@ uint16_t bcd;
 uint8_t display[4];
 volatile uint16_t holdingRegisters[4];
 volatile uint8_t outstate = 0;
+volatile uint8_t ejector_timer = 0;
 
 void timer0_init()
 {
@@ -31,15 +32,15 @@ void timer0_init()
     TIMSK |= 1<<OCIE0;     //IRQ on TIMER0 output compareA
 }
 
-void timer2_init(void) {
+void timer1_init(void) {
-    //TCCR2 = (1<<WGM21); //TIMER0 SET-UP: CTC MODE
+	TCCR1B|= (1<<CS12) | (1<<WGM12); //prescaler 8
-    //TCCR2 = (1<<CS21)|(1<<CS20); // PS 1:64
+    OCR1A = 62500;
-    //OCR2 = 25; // 1ms reach for clear (16mz:64=>250kHz:250-=>1kHz)
+	TIMSK|=(1<<OCIE1A);
-    //TIMSK |= 1<<OCIE2;     //IRQ on TIMER0 output compareA
+}
 
+void timer2_init(void) {
 	TCCR2|=(1<<CS21); //prescaler 8
 	TIMSK|=(1<<TOIE2);
-
 }
 
 unsigned long bin2bcd (uint32_t n)     // convert 16 bit binary n to 5 digit BCD (packed)
@@ -47,17 +48,7 @@ unsigned long bin2bcd (uint32_t n)     // convert 16 bit binary n to 5 digit BCD
     return n + 6 * (n/10 + 16*(n/100) + 256*(n/1000) + 4096*(n/10000));
 }
 
-void modbusGet(void) {
+void update_display(){
-    if (modbusGetBusState() & (1<<ReceiveCompleted))
-    {
-        switch(rxbuffer[1]) {
-            case fcReadHoldingRegisters:
-                holdingRegisters[1] = bcd;
-                modbusExchangeRegisters(holdingRegisters,0,4);
-                break;
-            case fcPresetMultipleRegisters:
-                modbusExchangeRegisters(holdingRegisters,0,1);
-
     uint8_t h = holdingRegisters[0] / 3600;
     uint8_t m = (holdingRegisters[0] / 60) % 60;
     uint8_t s = holdingRegisters[0] % 60;
@@ -67,25 +58,57 @@ void modbusGet(void) {
     else
         bcd = bin2bcd(s) | bin2bcd(m)<<8;
 
+    display[0] = font[(bcd&0x000f)];
+    display[1] = font[(bcd&0x00f0) >> 4];
+    display[2] = font[(bcd&0x0f00) >> 8];
+    display[3] = bcd&0xF000 ? font[(bcd&0xf000) >> 12] : 0;
+}
+
+void eject(){
+    PORTA |= _BV(7);
+    ejector_timer = 200;
+    //outstate |= _BV(1);
+}
+
+void reset_timer(){
+    outstate &= ~0x01;
+    holdingRegisters[0] = 17*60;
+    update_display();
+}
+
+void modbusGet(void) {
+    if (modbusGetBusState() & (1<<ReceiveCompleted))
+    {
+        switch(rxbuffer[1]) {
+            case fcReadHoldingRegisters:
+                holdingRegisters[1] = PINA & 0x0F;
+                holdingRegisters[2] = bcd;
+                modbusExchangeRegisters(holdingRegisters,0,4);
+                break;
+            case fcPresetMultipleRegisters:
+                modbusExchangeRegisters(holdingRegisters,0,1);
+                update_display();
                 break;
             case fcReadCoilStatus:
                 modbusExchangeBits(&outstate,0,8);
+                if(modbusIsInRange(3))
+                    outstate &= ~_BV(3);
                 break;
             case fcForceMultipleCoils:
             case fcForceSingleCoil:
+                ;
+                uint8_t oldstates = outstate;
                 modbusExchangeBits(&outstate,0,8);
 
-                if(outstate & 0x01)
+                if(!(oldstates & _BV(0)) && outstate & _BV(0)){
-                    PORTB|=1<<4;
+                    //reset_timer();
-                else
+                    update_display();
-                    PORTB&=~(1<<4);
+                    outstate |= _BV(0);
-
-                if(outstate & 0x02){
-                    PORTA |= _BV(7);
-                    _delay_ms(250); // well ...
-                    PORTA &= ~_BV(7);
-                    outstate &= ~0x02;
                 }
+
+                if(outstate & 0x02)
+                    eject();
+
                 break;
             default:
                 modbusSendException(ecIllegalFunction);
@@ -102,27 +125,51 @@ int main(void){
     DDRC = 0xFE;                                // uln output 2
     DDRA |= _BV(7);                             // ejector out
 
+    PORTA |= _BV(0) | _BV(1) | _BV(2);          // pullups on button inputs
+
 	modbusSetAddress(24);
 	modbusInit();
 
     timer0_init();
+    timer1_init();
     timer2_init();
 
+    outstate |= _BV(2);
+    holdingRegisters[0] = 17*60;
+
     sei();
 
+    uint8_t old_A = PINA;
     while(1){
-        display[0] = font[(bcd&0x000f)];
-        display[1] = font[(bcd&0x00f0) >> 4];
-        display[2] = font[(bcd&0x0f00) >> 8];
-        display[3] = bcd&0xF000 ? font[(bcd&0xf000) >> 12] : 0;
-
         modbusGet();
+
+        if(!(PINA & _BV(2))){
+            holdingRegisters[0] += 5;
+            update_display();
+            _delay_ms(10);
+        }
+        if(!(PINA & _BV(1))){
+            if(holdingRegisters[0]>5){
+                holdingRegisters[0] -= 5;
+                update_display();
+                _delay_ms(10);
+            }
+        }
+        if(!(PINA & _BV(0)) && (old_A & _BV(0))){
+            if(!(outstate & 0x01)){
+                reset_timer();
+            }
+            outstate ^= 0x01;
+            _delay_ms(100);
+        }
+        old_A = PINA;
     }
 
 }
 
 ISR(TIMER0_COMP_vect) {
     if(outstate & 0x01){
+        PORTB|=1<<4; // dots
         if(PORTB & 0x01){
             PORTB = (PORTB & 0xF0) | 1<<1 | 1<<3;
             PORTD = display[3] & 0xFC;
@@ -137,8 +184,33 @@ ISR(TIMER0_COMP_vect) {
         }
     }
     else{
+        PORTB&=~(1<<4); // dots
         PORTB &= ~0x0F;
     }
+
+    if(ejector_timer > 0 && ejector_timer < 0xFF){
+        ejector_timer--;
+    }
+    else if(ejector_timer == 0){
+        PORTA &= ~_BV(7);
+        outstate &= ~0x02;
+        ejector_timer = 0xFF;
+    }
+}
+
+ISR(TIMER1_COMPA_vect) {
+    if(outstate & 0x01){
+        holdingRegisters[0]--;
+        update_display();
+    }
+
+    if(holdingRegisters[0] == 0){
+        reset_timer();
+        if(outstate & _BV(2)){
+            eject();
+            outstate |= _BV(3);
+        }
+    }
 }
 
 ISR(TIMER2_OVF_vect) { //this ISR is called 9765.625 times per second