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Add support for modern AVRs like Attiny 0,1,2 series #141

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Add support for modern AVRs like Attiny 0,1,2 series #141

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37 changes: 25 additions & 12 deletions src/platform.h
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Original file line number Diff line number Diff line change
Expand Up @@ -15,18 +15,31 @@
#define ONEWIREHUB_GCC_VERSION 0
#endif

#if defined(__AVR__) /* arduino (all with atmega, atiny) */

#define PIN_TO_BASEREG(pin) (portInputRegister(digitalPinToPort(pin)))
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define DIRECT_READ(base, mask) (((*(base)) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) ((*((base) + 1)) &= ~(mask))
#define DIRECT_MODE_OUTPUT(base, mask) ((*((base) + 1)) |= (mask))
#define DIRECT_WRITE_LOW(base, mask) ((*((base) + 2)) &= ~(mask))
#define DIRECT_WRITE_HIGH(base, mask) ((*((base) + 2)) |= (mask))
using io_reg_t = uint8_t; // define special datatype for register-access
constexpr uint8_t VALUE_IPL{13};
// ⤷ instructions per loop, compare 0 takes 11, compare 1 takes 13 cycles
#if defined (__AVR__)
#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin))
#define IO_REG_TYPE uint8_t
#define IO_REG_BASE_ATTR asm("r30")
#define IO_REG_MASK_ATTR
using io_reg_t = uint8_t; // define special datatype for register-access
constexpr uint8_t VALUE_IPL{13}; // instructions per loop, compare 0 takes 11, compare 1 takes 13 cycles
// Modern AVRs like attiny 0,1,2 series
#if ((__AVR_ARCH__ == 102) || (__AVR_ARCH__ == 103) || (__AVR_ARCH__ == 104))
#define PIN_TO_BASEREG(pin) ((volatile uint8_t *) ((digitalPinToPort(pin)) << 2))
#define DIRECT_READ(base, mask) ((*((base) + 2) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) ((*(base)) &= ~(mask))
#define DIRECT_MODE_OUTPUT(base, mask) ((*(base)) |= (mask))
#define DIRECT_WRITE_LOW(base, mask) ((*((base) + 1)) &= ~(mask))
#define DIRECT_WRITE_HIGH(base, mask) ((*((base) + 1)) |= (mask))
// older AVRs like atmega328p
#else
#define PIN_TO_BASEREG(pin) (portInputRegister(digitalPinToPort(pin)))
#define DIRECT_READ(base, mask) (((*(base)) & (mask)) ? 1 : 0)
#define DIRECT_MODE_INPUT(base, mask) ((*((base) + 1)) &= ~(mask))
#define DIRECT_MODE_OUTPUT(base, mask) ((*((base) + 1)) |= (mask))
#define DIRECT_WRITE_LOW(base, mask) ((*((base) + 2)) &= ~(mask))
#define DIRECT_WRITE_HIGH(base, mask) ((*((base) + 2)) |= (mask))
constexpr uint8_t VALUE_IPL{13};
#endif

#elif defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK66FX1M0__) || \
defined(__MK64FX512__) /* teensy 3.2 to 3.6 */
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