andrewm@0: /*
andrewm@0:  * Utilities.h
andrewm@0:  *
andrewm@0:  *  Created on: Oct 27, 2014
andrewm@0:  *      Author: parallels
andrewm@0:  */
andrewm@0: 
andrewm@0: #ifndef UTILITIES_H_
andrewm@0: #define UTILITIES_H_
andrewm@0: 
andrewm@13: extern int gNumAudioChannels;	// How many audio channels are present
giuliomoro@19: extern int gNumAnalogChannels;	// How many analog channels are present
andrewm@13: 
giuliomoro@19: // Macros for accessing the analog values: usable _only_ within render()
andrewm@5: 
giuliomoro@19: // Read an Analog input from input pin p at frame f
giuliomoro@19: #define AnalogRead(p, f) (analogIn[(f)*gNumAnalogChannels + (p)])
giuliomoro@19: // Write an Analog output frame at output pin p, frame f, to value v
giuliomoro@19: #define AnalogWriteFrame(p, f, v) (analogOut[(f)*gNumAnalogChannels + (p)] = (v))
giuliomoro@19: #define AnalogWrite(pin, frame, value) \
giuliomoro@18: (({do {\
giuliomoro@19: 	for (int _privateI=(frame); _privateI<numAnalogFrames; _privateI++){ \
giuliomoro@19: 		AnalogWriteFrame(pin,_privateI,value); \
giuliomoro@18: 	}\
giuliomoro@18: 	} while (0);}),(void)0)\
andrewm@5: 
giuliomoro@16: #define setBit(word,bit) ((word)|(1<<(bit)))
giuliomoro@16: #define clearBit(word,bit) ((word)&~(1<<(bit)))
giuliomoro@16: #define getBit(word,bit) (((word)>>(bit))&1)
giuliomoro@16: #define changeBit(word,bit,value) ((clearBit((word),(bit))) | ((value)<<(bit)))
giuliomoro@19: //digital API:
giuliomoro@19: #define setDigitalDirectionFrame(pin,frame,direction) digital[(frame)]=changeBit(digital[(frame)],(pin),(direction))
giuliomoro@19: #define setDigitalDirection(pin,frame,direction) (for(int _privateI=(frame);_privateI<gNumGpioFrames;_privateI++) digital[_privateI]=changeBit(digital[(_privateI)],(pin),(direction))),void(0)
giuliomoro@19: #define digitalWriteAll(frame,value) digital[(frame)]=0xffff0000*(!(!value));
giuliomoro@16: //sets the bit in the high word, clears the bit in the low word (just in case the direction was not previously set)
giuliomoro@19: #define digitalWriteFrame(pin, frame, value) digital[(frame)]=( changeBit(digital[(frame)], (pin+16), (value)) & (0xffffffff-(1<<(pin))) ) //could have been done with two subsequent assignments
giuliomoro@18: #define digitalWrite(pin, frame, value) \
giuliomoro@18: 	(({do {\
giuliomoro@19: 		for (int _privateI=(frame); _privateI<gNumDigitalFrames; _privateI++) \
giuliomoro@18: 			digitalWriteFrame(pin,_privateI,value); \
giuliomoro@18: 		} while (0);}),(void)0)\
giuliomoro@18: 
giuliomoro@19: #define digitalRead(pin, frame) ( getBit(digital[(frame)], pin+16) )
giuliomoro@16: 
andrewm@0: float map(float x, float in_min, float in_max, float out_min, float out_max);
andrewm@0: float constrain(float x, float min_val, float max_val);
andrewm@0: 
andrewm@0: #endif /* UTILITIES_H_ */