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This commit is contained in:
Eggert Jung
2022-10-22 01:06:33 +02:00
parent 03d7fa4513
commit bd3b2ed44c
1 changed files with 105 additions and 33 deletions
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138
main.c
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@@ -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) {
//TCCR2 = (1<<WGM21); //TIMER0 SET-UP: CTC MODE
//TCCR2 = (1<<CS21)|(1<<CS20); // PS 1:64
//OCR2 = 25; // 1ms reach for clear (16mz:64=>250kHz:250-=>1kHz)
//TIMSK |= 1<<OCIE2; //IRQ on TIMER0 output compareA
void timer1_init(void) {
TCCR1B|= (1<<CS12) | (1<<WGM12); //prescaler 8
OCR1A = 62500;
TIMSK|=(1<<OCIE1A);
}
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)
@@ -47,45 +48,67 @@ 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 update_display(){
uint8_t h = holdingRegisters[0] / 3600;
uint8_t m = (holdingRegisters[0] / 60) % 60;
uint8_t s = holdingRegisters[0] % 60;
if(h)
bcd = bin2bcd(m) | bin2bcd(h)<<8;
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] = bcd;
holdingRegisters[1] = PINA & 0x0F;
holdingRegisters[2] = 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;
if(h)
bcd = bin2bcd(m) | bin2bcd(h)<<8;
else
bcd = bin2bcd(s) | bin2bcd(m)<<8;
update_display();
break;
case fcReadCoilStatus:
modbusExchangeBits(&outstate,0,8);
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)
PORTB|=1<<4;
else
PORTB&=~(1<<4);
if(outstate & 0x02){
PORTA |= _BV(7);
_delay_ms(250); // well ...
PORTA &= ~_BV(7);
outstate &= ~0x02;
if(!(oldstates & _BV(0)) && outstate & _BV(0)){
//reset_timer();
update_display();
outstate |= _BV(0);
}
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