marvin/arduino-c
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Fixed reading digital pin, started analog pin.

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This commit is contained in:
Marvin Blum
2017-03-21 19:59:53 +01:00
parent 3f75505887
commit fbf8bd8a4f
3 changed files with 90 additions and 50 deletions
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24
main.c
View File

@@ -16,18 +16,26 @@ int main(){
void prepare(){
serial_init(9600);
digital_pin_mode(5, OUTPUT);
digital_pin_mode(11, OUTPUT);
/*pin_mode(11, OUTPUT);
pin_mode(10, INPUT);
pin_mode(8, INPUT);*/
pin_mode(A4, INPUT);
}
void loop(){
digital_write(5, HIGH);
/*if(digital_read(10) && digital_read(8)){
digital_write(11, HIGH);
_delay_ms(1000);
digital_write(5, LOW);
}
else{
digital_write(11, LOW);
}*/
_delay_ms(1000);
if(analog_read(A4) > 0){
serial_write("ok", 3);
}
else{
serial_write("nope", 5);
}
_delay_ms(25);
}

96
pins.c
View File

@@ -6,27 +6,52 @@ const unsigned char HIGH = 0x01;
const unsigned char INPUT = 0x00;
const unsigned char OUTPUT = 0x01;
void digital_pin_mode(unsigned char pin, unsigned char mode){
if(pin > 13){
// analog pins (digital range from 0 to 13)
const unsigned char A0 = 0x0e;
const unsigned char A1 = 0x0f;
const unsigned char A2 = 0x10;
const unsigned char A3 = 0x11;
const unsigned char A4 = 0x12;
const unsigned char A5 = 0x13;
const unsigned char A6 = 0x14;
const unsigned char A7 = 0x15;
unsigned char map_analog_pin(unsigned char);
void pin_mode(unsigned char pin, unsigned char mode){
if(pin > A7){
return;
}
if(pin < 8){
// digital pin 0-7
if(mode == INPUT){
DDRD &= ~_BV(DDD0+pin);
DDRD &= ~_BV(pin);
}
else{
DDRD |= _BV(DDD0+pin);
DDRD |= _BV(pin);
}
}
else{
else if(pin < 14){
// digital pin 8-13
pin -= 8;
if(mode == INPUT){
DDRB &= ~_BV(DDB0+pin);
DDRB &= ~_BV(pin);
}
else{
DDRB |= _BV(DDB0+pin);
DDRB |= _BV(pin);
}
}
else{
// analog pin 0-7
pin -= 14;
if(mode == INPUT){
DDRC &= ~_BV(pin);
}
else{
DDRC |= _BV(pin);
}
}
}
@@ -40,12 +65,12 @@ int digital_read(unsigned char pin){
if(pin < 8){
// pin 0-7
return PIND&_BV(DDD0+pin);
return PIND&_BV(pin) ? 1 : 0;
}
// pin 8-13
pin -= 8;
return PINB&_BV(DDB0+pin);
return PINB&_BV(pin) ? 1 : 0;
}
void digital_write(unsigned char pin, unsigned char value){
@@ -57,63 +82,64 @@ void digital_write(unsigned char pin, unsigned char value){
if(pin < 8){
// pin 0-7
// DDRD |= _BV(DDD0+pin);
if(value == HIGH){
PORTD |= _BV(DDD0+pin);
PORTD |= _BV(pin);
}
else{
PORTD &= ~_BV(DDD0+pin);
PORTD &= ~_BV(pin);
}
}
else{
// pin 8-13
pin -= 8;
// DDRB |= _BV(DDB0+pin);
if(value == HIGH){
PORTB |= _BV(DDB0+pin);
PORTB |= _BV(pin);
}
else{
PORTB &= ~_BV(DDB0+pin);
PORTB &= ~_BV(pin);
}
}
}
void analog_pin_mode(unsigned char pin, unsigned char mode){
if(pin > 7){
return;
}
if(mode == INPUT){
DDRC &= ~_BV(DDC0+pin);
}
else{
DDRC |= _BV(DDC0+pin);
}
}
int analog_read(unsigned char pin){
pin = map_analog_pin(pin);
if(pin > 7){
return 0;
}
return PINC&_BV(DDC0+pin);
// TODO use ADC
ADMUX = 0xf0|pin;
ADCSRA |= _BV(pin);
while(ADCSRA&_BV(pin));
return ADC;
}
void analog_write(unsigned char pin, unsigned char value){
void analog_write(unsigned char pin, int value){
pin = map_analog_pin(pin);
if(pin > 7){
return;
}
// TODO turn off pwm
DDRC |= _BV(DDC0+pin);
if(value == HIGH){
PORTC |= _BV(DDC0+pin);
PORTC |= _BV(pin);
}
else{
PORTC &= ~_BV(DDC0+pin);
PORTC &= ~_BV(pin);
}
}
// maps A0-A7 to 0-7
unsigned char map_analog_pin(unsigned char pin){
if(pin > 7){
return pin-A0;
}
return pin;
}

16
pins.h
View File

@@ -6,13 +6,19 @@ extern const unsigned char HIGH;
extern const unsigned char INPUT;
extern const unsigned char OUTPUT;
// rename underscore, unify digital and analog
void digital_pin_mode(unsigned char, unsigned char);
extern const unsigned char A0;
extern const unsigned char A1;
extern const unsigned char A2;
extern const unsigned char A3;
extern const unsigned char A4;
extern const unsigned char A5;
extern const unsigned char A6;
extern const unsigned char A7;
void pin_mode(unsigned char, unsigned char);
int digital_read(unsigned char);
void digital_write(unsigned char, unsigned char);
void analog_pin_mode(unsigned char, unsigned char);
int analog_read(unsigned char);
void analog_write(unsigned char, unsigned char);
void analog_write(unsigned char, int);
#endif