249 lines
9.2 KiB
C++
249 lines
9.2 KiB
C++
#ifndef __INC_FASTPIN_H
|
|
#define __INC_FASTPIN_H
|
|
|
|
#include "FastLED.h"
|
|
|
|
#include "led_sysdefs.h"
|
|
#include <stddef.h>
|
|
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wignored-qualifiers"
|
|
|
|
///@file fastpin.h
|
|
/// Class base definitions for defining fast pin access
|
|
|
|
FASTLED_NAMESPACE_BEGIN
|
|
|
|
#define NO_PIN 255
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Pin access class - needs to tune for various platforms (naive fallback solution?)
|
|
//
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
class Selectable {
|
|
public:
|
|
virtual void select() = 0;
|
|
virtual void release() = 0;
|
|
virtual bool isSelected() = 0;
|
|
};
|
|
|
|
#if !defined(FASTLED_NO_PINMAP)
|
|
|
|
class Pin : public Selectable {
|
|
volatile RwReg *mPort;
|
|
volatile RoReg *mInPort;
|
|
RwReg mPinMask;
|
|
uint8_t mPin;
|
|
|
|
void _init() {
|
|
mPinMask = digitalPinToBitMask(mPin);
|
|
mPort = (volatile RwReg*)portOutputRegister(digitalPinToPort(mPin));
|
|
mInPort = (volatile RoReg*)portInputRegister(digitalPinToPort(mPin));
|
|
}
|
|
public:
|
|
Pin(int pin) : mPin(pin) { _init(); }
|
|
|
|
typedef volatile RwReg * port_ptr_t;
|
|
typedef RwReg port_t;
|
|
|
|
inline void setOutput() { pinMode(mPin, OUTPUT); }
|
|
inline void setInput() { pinMode(mPin, INPUT); }
|
|
|
|
inline void hi() __attribute__ ((always_inline)) { *mPort |= mPinMask; }
|
|
inline void lo() __attribute__ ((always_inline)) { *mPort &= ~mPinMask; }
|
|
|
|
inline void strobe() __attribute__ ((always_inline)) { toggle(); toggle(); }
|
|
inline void toggle() __attribute__ ((always_inline)) { *mInPort = mPinMask; }
|
|
|
|
inline void hi(register port_ptr_t port) __attribute__ ((always_inline)) { *port |= mPinMask; }
|
|
inline void lo(register port_ptr_t port) __attribute__ ((always_inline)) { *port &= ~mPinMask; }
|
|
inline void set(register port_t val) __attribute__ ((always_inline)) { *mPort = val; }
|
|
|
|
inline void fastset(register port_ptr_t port, register port_t val) __attribute__ ((always_inline)) { *port = val; }
|
|
|
|
port_t hival() __attribute__ ((always_inline)) { return *mPort | mPinMask; }
|
|
port_t loval() __attribute__ ((always_inline)) { return *mPort & ~mPinMask; }
|
|
port_ptr_t port() __attribute__ ((always_inline)) { return mPort; }
|
|
port_t mask() __attribute__ ((always_inline)) { return mPinMask; }
|
|
|
|
virtual void select() { hi(); }
|
|
virtual void release() { lo(); }
|
|
virtual bool isSelected() { return (*mPort & mPinMask) == mPinMask; }
|
|
};
|
|
|
|
class OutputPin : public Pin {
|
|
public:
|
|
OutputPin(int pin) : Pin(pin) { setOutput(); }
|
|
};
|
|
|
|
class InputPin : public Pin {
|
|
public:
|
|
InputPin(int pin) : Pin(pin) { setInput(); }
|
|
};
|
|
|
|
#else
|
|
// This is the empty code version of the raw pin class, method bodies should be filled in to Do The Right Thing[tm] when making this
|
|
// available on a new platform
|
|
class Pin : public Selectable {
|
|
volatile RwReg *mPort;
|
|
volatile RoReg *mInPort;
|
|
RwReg mPinMask;
|
|
uint8_t mPin;
|
|
|
|
void _init() {
|
|
// TODO: fill in init on a new platform
|
|
mPinMask = 0;
|
|
mPort = NULL;
|
|
mInPort = NULL;
|
|
}
|
|
public:
|
|
Pin(int pin) : mPin(pin) { _init(); }
|
|
|
|
void setPin(int pin) { mPin = pin; _init(); }
|
|
|
|
typedef volatile RwReg * port_ptr_t;
|
|
typedef RwReg port_t;
|
|
|
|
inline void setOutput() { /* TODO: Set pin output */ }
|
|
inline void setInput() { /* TODO: Set pin input */ }
|
|
|
|
inline void hi() __attribute__ ((always_inline)) { *mPort |= mPinMask; }
|
|
inline void lo() __attribute__ ((always_inline)) { *mPort &= ~mPinMask; }
|
|
|
|
inline void strobe() __attribute__ ((always_inline)) { toggle(); toggle(); }
|
|
inline void toggle() __attribute__ ((always_inline)) { *mInPort = mPinMask; }
|
|
|
|
inline void hi(register port_ptr_t port) __attribute__ ((always_inline)) { *port |= mPinMask; }
|
|
inline void lo(register port_ptr_t port) __attribute__ ((always_inline)) { *port &= ~mPinMask; }
|
|
inline void set(register port_t val) __attribute__ ((always_inline)) { *mPort = val; }
|
|
|
|
inline void fastset(register port_ptr_t port, register port_t val) __attribute__ ((always_inline)) { *port = val; }
|
|
|
|
port_t hival() __attribute__ ((always_inline)) { return *mPort | mPinMask; }
|
|
port_t loval() __attribute__ ((always_inline)) { return *mPort & ~mPinMask; }
|
|
port_ptr_t port() __attribute__ ((always_inline)) { return mPort; }
|
|
port_t mask() __attribute__ ((always_inline)) { return mPinMask; }
|
|
|
|
virtual void select() { hi(); }
|
|
virtual void release() { lo(); }
|
|
virtual bool isSelected() { return (*mPort & mPinMask) == mPinMask; }
|
|
};
|
|
|
|
class OutputPin : public Pin {
|
|
public:
|
|
OutputPin(int pin) : Pin(pin) { setOutput(); }
|
|
};
|
|
|
|
class InputPin : public Pin {
|
|
public:
|
|
InputPin(int pin) : Pin(pin) { setInput(); }
|
|
};
|
|
|
|
#endif
|
|
|
|
/// The simplest level of Pin class. This relies on runtime functions durinig initialization to get the port/pin mask for the pin. Most
|
|
/// of the accesses involve references to these static globals that get set up. This won't be the fastest set of pin operations, but it
|
|
/// will provide pin level access on pretty much all arduino environments. In addition, it includes some methods to help optimize access in
|
|
/// various ways. Namely, the versions of hi, lo, and fastset that take the port register as a passed in register variable (saving a global
|
|
/// dereference), since these functions are aggressively inlined, that can help collapse out a lot of extraneous memory loads/dereferences.
|
|
///
|
|
/// In addition, if, while writing a bunch of data to a pin, you know no other pins will be getting written to, you can get/cache a value of
|
|
/// the pin's port register and use that to do a full set to the register. This results in one being able to simply do a store to the register,
|
|
/// vs. the load, and/or, and store that would be done normally.
|
|
///
|
|
/// There are platform specific instantiations of this class that provide direct i/o register access to pins for much higher speed pin twiddling.
|
|
///
|
|
/// Note that these classes are all static functions. So the proper usage is Pin<13>::hi(); or such. Instantiating objects is not recommended,
|
|
/// as passing Pin objects around will likely -not- have the effect you're expecting.
|
|
#ifdef FASTLED_FORCE_SOFTWARE_PINS
|
|
template<uint8_t PIN> class FastPin {
|
|
static RwReg sPinMask;
|
|
static volatile RwReg *sPort;
|
|
static volatile RoReg *sInPort;
|
|
static void _init() {
|
|
#if !defined(FASTLED_NO_PINMAP)
|
|
sPinMask = digitalPinToBitMask(PIN);
|
|
sPort = portOutputRegister(digitalPinToPort(PIN));
|
|
sInPort = portInputRegister(digitalPinToPort(PIN));
|
|
#endif
|
|
}
|
|
public:
|
|
typedef volatile RwReg * port_ptr_t;
|
|
typedef RwReg port_t;
|
|
|
|
inline static void setOutput() { _init(); pinMode(PIN, OUTPUT); }
|
|
inline static void setInput() { _init(); pinMode(PIN, INPUT); }
|
|
|
|
inline static void hi() __attribute__ ((always_inline)) { *sPort |= sPinMask; }
|
|
inline static void lo() __attribute__ ((always_inline)) { *sPort &= ~sPinMask; }
|
|
|
|
inline static void strobe() __attribute__ ((always_inline)) { toggle(); toggle(); }
|
|
|
|
inline static void toggle() __attribute__ ((always_inline)) { *sInPort = sPinMask; }
|
|
|
|
inline static void hi(register port_ptr_t port) __attribute__ ((always_inline)) { *port |= sPinMask; }
|
|
inline static void lo(register port_ptr_t port) __attribute__ ((always_inline)) { *port &= ~sPinMask; }
|
|
inline static void set(register port_t val) __attribute__ ((always_inline)) { *sPort = val; }
|
|
|
|
inline static void fastset(register port_ptr_t port, register port_t val) __attribute__ ((always_inline)) { *port = val; }
|
|
|
|
static port_t hival() __attribute__ ((always_inline)) { return *sPort | sPinMask; }
|
|
static port_t loval() __attribute__ ((always_inline)) { return *sPort & ~sPinMask; }
|
|
static port_ptr_t port() __attribute__ ((always_inline)) { return sPort; }
|
|
static port_t mask() __attribute__ ((always_inline)) { return sPinMask; }
|
|
};
|
|
|
|
template<uint8_t PIN> RwReg FastPin<PIN>::sPinMask;
|
|
template<uint8_t PIN> volatile RwReg *FastPin<PIN>::sPort;
|
|
template<uint8_t PIN> volatile RoReg *FastPin<PIN>::sInPort;
|
|
|
|
#else
|
|
|
|
template<uint8_t PIN> class FastPin {
|
|
constexpr static bool validpin() { return false; }
|
|
|
|
static_assert(validpin(), "Invalid pin specified");
|
|
|
|
static void _init() {
|
|
}
|
|
public:
|
|
typedef volatile RwReg * port_ptr_t;
|
|
typedef RwReg port_t;
|
|
|
|
inline static void setOutput() { }
|
|
inline static void setInput() { }
|
|
|
|
inline static void hi() __attribute__ ((always_inline)) { }
|
|
inline static void lo() __attribute__ ((always_inline)) { }
|
|
|
|
inline static void strobe() __attribute__ ((always_inline)) { }
|
|
|
|
inline static void toggle() __attribute__ ((always_inline)) { }
|
|
|
|
inline static void hi(register port_ptr_t port) __attribute__ ((always_inline)) { }
|
|
inline static void lo(register port_ptr_t port) __attribute__ ((always_inline)) { }
|
|
inline static void set(register port_t val) __attribute__ ((always_inline)) { }
|
|
|
|
inline static void fastset(register port_ptr_t port, register port_t val) __attribute__ ((always_inline)) { }
|
|
|
|
static port_t hival() __attribute__ ((always_inline)) { return 0; }
|
|
static port_t loval() __attribute__ ((always_inline)) { return 0;}
|
|
static port_ptr_t port() __attribute__ ((always_inline)) { return NULL; }
|
|
static port_t mask() __attribute__ ((always_inline)) { return 0; }
|
|
};
|
|
|
|
#endif
|
|
|
|
template<uint8_t PIN> class FastPinBB : public FastPin<PIN> {};
|
|
|
|
typedef volatile uint32_t & reg32_t;
|
|
typedef volatile uint32_t * ptr_reg32_t;
|
|
|
|
FASTLED_NAMESPACE_END
|
|
|
|
#pragma GCC diagnostic pop
|
|
|
|
#endif // __INC_FASTPIN_H
|