marvin/arduino-c
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More work on PWM and added utility function to map values.

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Marvin Blum
2017-03-27 17:13:05 +02:00
parent bc2c6da436
commit 48d96d5b7d
7 changed files with 58 additions and 21 deletions
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50
ard/pins.c
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@@ -34,7 +34,7 @@ void pin_mode(unsigned char pin, unsigned char mode){
DDRD |= _BV(pin);
}
}
else if(pin < 14){
else if(pin < A0){
// digital pin 8-13
pin -= 8;
@@ -47,7 +47,7 @@ void pin_mode(unsigned char pin, unsigned char mode){
}
else{
// analog pin 0-7
pin -= 14;
pin -= A0;
if(mode == INPUT){
DDRC &= ~_BV(pin);
@@ -59,27 +59,31 @@ void pin_mode(unsigned char pin, unsigned char mode){
}
int digital_read(unsigned char pin){
if(pin > 13){
if(pin > A7){
return 0;
}
if(pin < 8){
// pin 0-7
// digital pin 0-7
return PIND&_BV(pin) ? 1 : 0;
}
else if(pin < A0){
// digital pin 8-13
pin -= 8;
return PINB&_BV(pin) ? 1 : 0;
}
// pin 8-13
pin -= 8;
return PINB&_BV(pin) ? 1 : 0;
// analog pin 0-7
return analog_read(pin) > 512 ? 1 : 0;
}
void digital_write(unsigned char pin, unsigned char value){
if(pin > 13){
if(pin > A7){
return;
}
if(pin < 8){
// pin 0-7
// digital pin 0-7
if(value == HIGH){
PORTD |= _BV(pin);
}
@@ -87,8 +91,8 @@ void digital_write(unsigned char pin, unsigned char value){
PORTD &= ~_BV(pin);
}
}
else{
// pin 8-13
else if(pin < A0){
// digital pin 8-13
pin -= 8;
if(value == HIGH){
@@ -98,6 +102,17 @@ void digital_write(unsigned char pin, unsigned char value){
PORTB &= ~_BV(pin);
}
}
else{
// analog pin 0-7
pin -= A0;
if(value == HIGH){
PORTC |= _BV(pin);
}
else{
PORTC &= ~_BV(pin);
}
}
}
unsigned int analog_read(unsigned char pin){
@@ -121,19 +136,22 @@ unsigned int analog_read(unsigned char pin){
return ADC;
}
// TODO: write PWM to digital pins which allow it
void analog_write(unsigned char pin, unsigned int value){
pin = map_analog_pin(pin);
if(pin > 7){
if(pin > 11){
return;
}
if(value == HIGH){
if(value > 255){
value = 255;
}
/*if(value == HIGH){
PORTC |= _BV(pin);
}
else{
PORTC &= ~_BV(pin);
}
}*/
}
// maps A0-A7 to 0-7