forked from youen/OneWireArduinoSlave
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94 lines
3.5 KiB
94 lines
3.5 KiB
10 years ago
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#ifndef _LowLevel_h
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#define _LowLevel_h
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#include <inttypes.h>
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#if ARDUINO >= 100
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#include "Arduino.h" // for delayMicroseconds, digitalPinToBitMask, etc
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#else
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#include "WProgram.h" // for delayMicroseconds
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#include "pins_arduino.h" // for digitalPinToBitMask, etc
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#endif
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#if defined(__AVR__)
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#define PIN_TO_BASEREG(pin) (portInputRegister(digitalPinToPort(pin)))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint8_t
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#define IO_REG_ASM asm("r30")
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#define DIRECT_READ(base, mask) (((*(base)) & (mask)) ? 1 : 0)
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#define DIRECT_MODE_INPUT(base, mask) ((*((base)+1)) &= ~(mask))
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#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+1)) |= (mask))
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#define DIRECT_WRITE_LOW(base, mask) ((*((base)+2)) &= ~(mask))
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#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+2)) |= (mask))
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#elif defined(__MK20DX128__) || defined(__MK20DX256__)
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#define PIN_TO_BASEREG(pin) (portOutputRegister(pin))
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#define PIN_TO_BITMASK(pin) (1)
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#define IO_REG_TYPE uint8_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) (*((base)+512))
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#define DIRECT_MODE_INPUT(base, mask) (*((base)+640) = 0)
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#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+640) = 1)
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#define DIRECT_WRITE_LOW(base, mask) (*((base)+256) = 1)
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#define DIRECT_WRITE_HIGH(base, mask) (*((base)+128) = 1)
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#elif defined(__SAM3X8E__)
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// Arduino 1.5.1 may have a bug in delayMicroseconds() on Arduino Due.
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// http://arduino.cc/forum/index.php/topic,141030.msg1076268.html#msg1076268
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// If you have trouble with OneWire on Arduino Due, please check the
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// status of delayMicroseconds() before reporting a bug in OneWire!
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#define PIN_TO_BASEREG(pin) (&(digitalPinToPort(pin)->PIO_PER))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint32_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) (((*((base)+15)) & (mask)) ? 1 : 0)
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#define DIRECT_MODE_INPUT(base, mask) ((*((base)+5)) = (mask))
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#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+4)) = (mask))
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#define DIRECT_WRITE_LOW(base, mask) ((*((base)+13)) = (mask))
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#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+12)) = (mask))
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#ifndef PROGMEM
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#define PROGMEM
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#endif
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#ifndef pgm_read_byte
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#define pgm_read_byte(addr) (*(const uint8_t *)(addr))
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#endif
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#elif defined(__PIC32MX__)
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#define PIN_TO_BASEREG(pin) (portModeRegister(digitalPinToPort(pin)))
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#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
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#define IO_REG_TYPE uint32_t
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#define IO_REG_ASM
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#define DIRECT_READ(base, mask) (((*(base+4)) & (mask)) ? 1 : 0) //PORTX + 0x10
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#define DIRECT_MODE_INPUT(base, mask) ((*(base+2)) = (mask)) //TRISXSET + 0x08
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#define DIRECT_MODE_OUTPUT(base, mask) ((*(base+1)) = (mask)) //TRISXCLR + 0x04
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#define DIRECT_WRITE_LOW(base, mask) ((*(base+8+1)) = (mask)) //LATXCLR + 0x24
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#define DIRECT_WRITE_HIGH(base, mask) ((*(base+8+2)) = (mask)) //LATXSET + 0x28
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#else
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#error "Please define I/O register types here"
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#endif
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class Pin
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{
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private:
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IO_REG_TYPE mask;
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volatile IO_REG_TYPE *reg;
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public:
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inline Pin(uint8_t pin)
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{
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mask = PIN_TO_BITMASK(pin);
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reg = PIN_TO_BASEREG(pin);
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}
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inline void inputMode() { DIRECT_MODE_INPUT(reg, mask); }
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inline void outputMode() { DIRECT_MODE_OUTPUT(reg, mask); }
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inline bool read() { return DIRECT_READ(reg, mask); }
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inline void writeLow() { DIRECT_WRITE_LOW(reg, mask); }
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inline void writeHigh() { DIRECT_WRITE_HIGH(reg, mask); }
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inline void write(bool value) { if (value) writeHigh(); else writeLow(); }
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};
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#endif
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