diff --git a/Marlin/softspi.h b/Marlin/softspi.h
new file mode 100644
index 0000000000000000000000000000000000000000..ef529d817047dfbe4eff35958860eb421d6d0a5c
--- /dev/null
+++ b/Marlin/softspi.h
@@ -0,0 +1,770 @@
+//https://github.com/niteris/ArduinoSoftSpi
+
+#include <Arduino.h>
+#ifdef __arm__
+#ifdef CORE_TEENSY
+//------------------------------------------------------------------------------
+/** read pin value
+ * @param[in] pin Arduino pin number
+ * @return value read
+ */
+static inline __attribute__((always_inline))
+bool fastDigitalRead(uint8_t pin) {
+ return *portInputRegister(pin);
+}
+//------------------------------------------------------------------------------
+/** Set pin value
+ * @param[in] pin Arduino pin number
+ * @param[in] level value to write
+ */
+static inline __attribute__((always_inline))
+void fastDigitalWrite(uint8_t pin, bool value) {
+ if (value) {
+ *portSetRegister(pin) = 1;
+ } else {
+ *portClearRegister(pin) = 1;
+ }
+}
+#else // CORE_TEENSY
+//------------------------------------------------------------------------------
+/** read pin value
+ * @param[in] pin Arduino pin number
+ * @return value read
+ */
+static inline __attribute__((always_inline))
+bool fastDigitalRead(uint8_t pin){
+ return g_APinDescription[pin].pPort->PIO_PDSR & g_APinDescription[pin].ulPin;
+}
+//------------------------------------------------------------------------------
+/** Set pin value
+ * @param[in] pin Arduino pin number
+ * @param[in] level value to write
+ */
+static inline __attribute__((always_inline))
+void fastDigitalWrite(uint8_t pin, bool value){
+ if(value) {
+ g_APinDescription[pin].pPort->PIO_SODR = g_APinDescription[pin].ulPin;
+ } else {
+ g_APinDescription[pin].pPort->PIO_CODR = g_APinDescription[pin].ulPin;
+ }
+}
+#endif // CORE_TEENSY
+//------------------------------------------------------------------------------
+inline void fastDigitalToggle(uint8_t pin) {
+ fastDigitalWrite(pin, !fastDigitalRead(pin));
+ }
+//------------------------------------------------------------------------------
+inline void fastPinMode(uint8_t pin, bool mode) {pinMode(pin, mode);}
+#else // __arm__
+#include <avr/io.h>
+#include <util/atomic.h>
+//------------------------------------------------------------------------------
+/**
+ * @class pin_map_t
+ * @brief struct for mapping digital pins
+ */
+struct pin_map_t {
+ volatile uint8_t* ddr; /**< address of DDR for this pin */
+ volatile uint8_t* pin; /**< address of PIN for this pin */
+ volatile uint8_t* port; /**< address of PORT for this pin */
+ uint8_t bit; /**< bit number for this pin */
+};
+//------------------------------------------------------------------------------
+#if defined(__AVR_ATmega168__)\
+||defined(__AVR_ATmega168P__)\
+||defined(__AVR_ATmega328P__)
+// 168 and 328 Arduinos
+const static pin_map_t pinMap[] = {
+ {&DDRD, &PIND, &PORTD, 0}, // D0 0
+ {&DDRD, &PIND, &PORTD, 1}, // D1 1
+ {&DDRD, &PIND, &PORTD, 2}, // D2 2
+ {&DDRD, &PIND, &PORTD, 3}, // D3 3
+ {&DDRD, &PIND, &PORTD, 4}, // D4 4
+ {&DDRD, &PIND, &PORTD, 5}, // D5 5
+ {&DDRD, &PIND, &PORTD, 6}, // D6 6
+ {&DDRD, &PIND, &PORTD, 7}, // D7 7
+ {&DDRB, &PINB, &PORTB, 0}, // B0 8
+ {&DDRB, &PINB, &PORTB, 1}, // B1 9
+ {&DDRB, &PINB, &PORTB, 2}, // B2 10
+ {&DDRB, &PINB, &PORTB, 3}, // B3 11
+ {&DDRB, &PINB, &PORTB, 4}, // B4 12
+ {&DDRB, &PINB, &PORTB, 5}, // B5 13
+ {&DDRC, &PINC, &PORTC, 0}, // C0 14
+ {&DDRC, &PINC, &PORTC, 1}, // C1 15
+ {&DDRC, &PINC, &PORTC, 2}, // C2 16
+ {&DDRC, &PINC, &PORTC, 3}, // C3 17
+ {&DDRC, &PINC, &PORTC, 4}, // C4 18
+ {&DDRC, &PINC, &PORTC, 5} // C5 19
+};
+//------------------------------------------------------------------------------
+#elif defined(__AVR_ATmega1280__)\
+|| defined(__AVR_ATmega2560__)
+// Mega
+static const pin_map_t pinMap[] = {
+ {&DDRE, &PINE, &PORTE, 0}, // E0 0
+ {&DDRE, &PINE, &PORTE, 1}, // E1 1
+ {&DDRE, &PINE, &PORTE, 4}, // E4 2
+ {&DDRE, &PINE, &PORTE, 5}, // E5 3
+ {&DDRG, &PING, &PORTG, 5}, // G5 4
+ {&DDRE, &PINE, &PORTE, 3}, // E3 5
+ {&DDRH, &PINH, &PORTH, 3}, // H3 6
+ {&DDRH, &PINH, &PORTH, 4}, // H4 7
+ {&DDRH, &PINH, &PORTH, 5}, // H5 8
+ {&DDRH, &PINH, &PORTH, 6}, // H6 9
+ {&DDRB, &PINB, &PORTB, 4}, // B4 10
+ {&DDRB, &PINB, &PORTB, 5}, // B5 11
+ {&DDRB, &PINB, &PORTB, 6}, // B6 12
+ {&DDRB, &PINB, &PORTB, 7}, // B7 13
+ {&DDRJ, &PINJ, &PORTJ, 1}, // J1 14
+ {&DDRJ, &PINJ, &PORTJ, 0}, // J0 15
+ {&DDRH, &PINH, &PORTH, 1}, // H1 16
+ {&DDRH, &PINH, &PORTH, 0}, // H0 17
+ {&DDRD, &PIND, &PORTD, 3}, // D3 18
+ {&DDRD, &PIND, &PORTD, 2}, // D2 19
+ {&DDRD, &PIND, &PORTD, 1}, // D1 20
+ {&DDRD, &PIND, &PORTD, 0}, // D0 21
+ {&DDRA, &PINA, &PORTA, 0}, // A0 22
+ {&DDRA, &PINA, &PORTA, 1}, // A1 23
+ {&DDRA, &PINA, &PORTA, 2}, // A2 24
+ {&DDRA, &PINA, &PORTA, 3}, // A3 25
+ {&DDRA, &PINA, &PORTA, 4}, // A4 26
+ {&DDRA, &PINA, &PORTA, 5}, // A5 27
+ {&DDRA, &PINA, &PORTA, 6}, // A6 28
+ {&DDRA, &PINA, &PORTA, 7}, // A7 29
+ {&DDRC, &PINC, &PORTC, 7}, // C7 30
+ {&DDRC, &PINC, &PORTC, 6}, // C6 31
+ {&DDRC, &PINC, &PORTC, 5}, // C5 32
+ {&DDRC, &PINC, &PORTC, 4}, // C4 33
+ {&DDRC, &PINC, &PORTC, 3}, // C3 34
+ {&DDRC, &PINC, &PORTC, 2}, // C2 35
+ {&DDRC, &PINC, &PORTC, 1}, // C1 36
+ {&DDRC, &PINC, &PORTC, 0}, // C0 37
+ {&DDRD, &PIND, &PORTD, 7}, // D7 38
+ {&DDRG, &PING, &PORTG, 2}, // G2 39
+ {&DDRG, &PING, &PORTG, 1}, // G1 40
+ {&DDRG, &PING, &PORTG, 0}, // G0 41
+ {&DDRL, &PINL, &PORTL, 7}, // L7 42
+ {&DDRL, &PINL, &PORTL, 6}, // L6 43
+ {&DDRL, &PINL, &PORTL, 5}, // L5 44
+ {&DDRL, &PINL, &PORTL, 4}, // L4 45
+ {&DDRL, &PINL, &PORTL, 3}, // L3 46
+ {&DDRL, &PINL, &PORTL, 2}, // L2 47
+ {&DDRL, &PINL, &PORTL, 1}, // L1 48
+ {&DDRL, &PINL, &PORTL, 0}, // L0 49
+ {&DDRB, &PINB, &PORTB, 3}, // B3 50
+ {&DDRB, &PINB, &PORTB, 2}, // B2 51
+ {&DDRB, &PINB, &PORTB, 1}, // B1 52
+ {&DDRB, &PINB, &PORTB, 0}, // B0 53
+ {&DDRF, &PINF, &PORTF, 0}, // F0 54
+ {&DDRF, &PINF, &PORTF, 1}, // F1 55
+ {&DDRF, &PINF, &PORTF, 2}, // F2 56
+ {&DDRF, &PINF, &PORTF, 3}, // F3 57
+ {&DDRF, &PINF, &PORTF, 4}, // F4 58
+ {&DDRF, &PINF, &PORTF, 5}, // F5 59
+ {&DDRF, &PINF, &PORTF, 6}, // F6 60
+ {&DDRF, &PINF, &PORTF, 7}, // F7 61
+ {&DDRK, &PINK, &PORTK, 0}, // K0 62
+ {&DDRK, &PINK, &PORTK, 1}, // K1 63
+ {&DDRK, &PINK, &PORTK, 2}, // K2 64
+ {&DDRK, &PINK, &PORTK, 3}, // K3 65
+ {&DDRK, &PINK, &PORTK, 4}, // K4 66
+ {&DDRK, &PINK, &PORTK, 5}, // K5 67
+ {&DDRK, &PINK, &PORTK, 6}, // K6 68
+ {&DDRK, &PINK, &PORTK, 7}, // K7 69
+
+//pins_MIGHTYBOARD_REVE.h
+ {&DDRG, &PING, &PORTG, 4}, // G4 70
+ {&DDRG, &PING, &PORTG, 3}, // G3 71
+ {&DDRJ, &PINJ, &PORTJ, 2}, // J2 72
+ {&DDRJ, &PINJ, &PORTJ, 3}, // J3 73
+ {&DDRJ, &PINJ, &PORTJ, 7}, // J7 74
+ {&DDRJ, &PINJ, &PORTJ, 4}, // J4 75
+ {&DDRJ, &PINJ, &PORTJ, 5}, // J5 76
+ {&DDRJ, &PINJ, &PORTJ, 6}, // J6 77
+ {&DDRE, &PINE, &PORTE, 2}, // E2 78
+ {&DDRE, &PINE, &PORTE, 6} // E6 79
+
+};
+//------------------------------------------------------------------------------
+#elif defined(__AVR_ATmega1284P__)\
+|| defined(__AVR_ATmega1284__)\
+|| defined(__AVR_ATmega644P__)\
+|| defined(__AVR_ATmega644__)\
+|| defined(__AVR_ATmega64__)\
+|| defined(__AVR_ATmega32__)\
+|| defined(__AVR_ATmega324__)\
+|| defined(__AVR_ATmega16__)
+
+#ifdef defined(VARIANT_MIGHTY)
+// Mighty Layout
+static const pin_map_t pinMap[] = {
+ {&DDRB, &PINB, &PORTB, 0}, // B0 0
+ {&DDRB, &PINB, &PORTB, 1}, // B1 1
+ {&DDRB, &PINB, &PORTB, 2}, // B2 2
+ {&DDRB, &PINB, &PORTB, 3}, // B3 3
+ {&DDRB, &PINB, &PORTB, 4}, // B4 4
+ {&DDRB, &PINB, &PORTB, 5}, // B5 5
+ {&DDRB, &PINB, &PORTB, 6}, // B6 6
+ {&DDRB, &PINB, &PORTB, 7}, // B7 7
+ {&DDRD, &PIND, &PORTD, 0}, // D0 8
+ {&DDRD, &PIND, &PORTD, 1}, // D1 9
+ {&DDRD, &PIND, &PORTD, 2}, // D2 10
+ {&DDRD, &PIND, &PORTD, 3}, // D3 11
+ {&DDRD, &PIND, &PORTD, 4}, // D4 12
+ {&DDRD, &PIND, &PORTD, 5}, // D5 13
+ {&DDRD, &PIND, &PORTD, 6}, // D6 14
+ {&DDRD, &PIND, &PORTD, 7}, // D7 15
+ {&DDRC, &PINC, &PORTC, 0}, // C0 16
+ {&DDRC, &PINC, &PORTC, 1}, // C1 17
+ {&DDRC, &PINC, &PORTC, 2}, // C2 18
+ {&DDRC, &PINC, &PORTC, 3}, // C3 19
+ {&DDRC, &PINC, &PORTC, 4}, // C4 20
+ {&DDRC, &PINC, &PORTC, 5}, // C5 21
+ {&DDRC, &PINC, &PORTC, 6}, // C6 22
+ {&DDRC, &PINC, &PORTC, 7}, // C7 23
+ {&DDRA, &PINA, &PORTA, 0}, // A0 24
+ {&DDRA, &PINA, &PORTA, 1}, // A1 25
+ {&DDRA, &PINA, &PORTA, 2}, // A2 26
+ {&DDRA, &PINA, &PORTA, 3}, // A3 27
+ {&DDRA, &PINA, &PORTA, 4}, // A4 28
+ {&DDRA, &PINA, &PORTA, 5}, // A5 29
+ {&DDRA, &PINA, &PORTA, 6}, // A6 30
+ {&DDRA, &PINA, &PORTA, 7} // A7 31
+};
+#elif defined(VARIANT_BOBUINO)
+// Bobuino Layout
+static const pin_map_t pinMap[] = {
+ {&DDRD, &PIND, &PORTD, 0}, // D0 0
+ {&DDRD, &PIND, &PORTD, 1}, // D1 1
+ {&DDRD, &PIND, &PORTD, 2}, // D2 2
+ {&DDRD, &PIND, &PORTD, 3}, // D3 3
+ {&DDRB, &PINB, &PORTB, 0}, // B0 4
+ {&DDRB, &PINB, &PORTB, 1}, // B1 5
+ {&DDRB, &PINB, &PORTB, 2}, // B2 6
+ {&DDRB, &PINB, &PORTB, 3}, // B3 7
+ {&DDRD, &PIND, &PORTD, 5}, // D5 8
+ {&DDRD, &PIND, &PORTD, 6}, // D6 9
+ {&DDRB, &PINB, &PORTB, 4}, // B4 10
+ {&DDRB, &PINB, &PORTB, 5}, // B5 11
+ {&DDRB, &PINB, &PORTB, 6}, // B6 12
+ {&DDRB, &PINB, &PORTB, 7}, // B7 13
+ {&DDRA, &PINA, &PORTA, 7}, // A7 14
+ {&DDRA, &PINA, &PORTA, 6}, // A6 15
+ {&DDRA, &PINA, &PORTA, 5}, // A5 16
+ {&DDRA, &PINA, &PORTA, 4}, // A4 17
+ {&DDRA, &PINA, &PORTA, 3}, // A3 18
+ {&DDRA, &PINA, &PORTA, 2}, // A2 19
+ {&DDRA, &PINA, &PORTA, 1}, // A1 20
+ {&DDRA, &PINA, &PORTA, 0}, // A0 21
+ {&DDRC, &PINC, &PORTC, 0}, // C0 22
+ {&DDRC, &PINC, &PORTC, 1}, // C1 23
+ {&DDRC, &PINC, &PORTC, 2}, // C2 24
+ {&DDRC, &PINC, &PORTC, 3}, // C3 25
+ {&DDRC, &PINC, &PORTC, 4}, // C4 26
+ {&DDRC, &PINC, &PORTC, 5}, // C5 27
+ {&DDRC, &PINC, &PORTC, 6}, // C6 28
+ {&DDRC, &PINC, &PORTC, 7}, // C7 29
+ {&DDRD, &PIND, &PORTD, 4}, // D4 30
+ {&DDRD, &PIND, &PORTD, 7} // D7 31
+};
+#elif defined(VARIANT_STANDARD)
+// Standard Layout
+static const pin_map_t pinMap[] = {
+ {&DDRB, &PINB, &PORTB, 0}, // B0 0
+ {&DDRB, &PINB, &PORTB, 1}, // B1 1
+ {&DDRB, &PINB, &PORTB, 2}, // B2 2
+ {&DDRB, &PINB, &PORTB, 3}, // B3 3
+ {&DDRB, &PINB, &PORTB, 4}, // B4 4
+ {&DDRB, &PINB, &PORTB, 5}, // B5 5
+ {&DDRB, &PINB, &PORTB, 6}, // B6 6
+ {&DDRB, &PINB, &PORTB, 7}, // B7 7
+ {&DDRD, &PIND, &PORTD, 0}, // D0 8
+ {&DDRD, &PIND, &PORTD, 1}, // D1 9
+ {&DDRD, &PIND, &PORTD, 2}, // D2 10
+ {&DDRD, &PIND, &PORTD, 3}, // D3 11
+ {&DDRD, &PIND, &PORTD, 4}, // D4 12
+ {&DDRD, &PIND, &PORTD, 5}, // D5 13
+ {&DDRD, &PIND, &PORTD, 6}, // D6 14
+ {&DDRD, &PIND, &PORTD, 7}, // D7 15
+ {&DDRC, &PINC, &PORTC, 0}, // C0 16
+ {&DDRC, &PINC, &PORTC, 1}, // C1 17
+ {&DDRC, &PINC, &PORTC, 2}, // C2 18
+ {&DDRC, &PINC, &PORTC, 3}, // C3 19
+ {&DDRC, &PINC, &PORTC, 4}, // C4 20
+ {&DDRC, &PINC, &PORTC, 5}, // C5 21
+ {&DDRC, &PINC, &PORTC, 6}, // C6 22
+ {&DDRC, &PINC, &PORTC, 7}, // C7 23
+ {&DDRA, &PINA, &PORTA, 7}, // A7 24
+ {&DDRA, &PINA, &PORTA, 6}, // A6 25
+ {&DDRA, &PINA, &PORTA, 5}, // A5 26
+ {&DDRA, &PINA, &PORTA, 4}, // A4 27
+ {&DDRA, &PINA, &PORTA, 3}, // A3 28
+ {&DDRA, &PINA, &PORTA, 2}, // A2 29
+ {&DDRA, &PINA, &PORTA, 1}, // A1 30
+ {&DDRA, &PINA, &PORTA, 0} // A0 31
+};
+#else // VARIANT_MIGHTY
+#error Undefined variant 1284, 644, 324, 64, 32
+#endif // VARIANT_MIGHTY
+//------------------------------------------------------------------------------
+#elif defined(__AVR_ATmega32U4__)
+#ifdef CORE_TEENSY
+// Teensy 2.0
+static const pin_map_t pinMap[] = {
+ {&DDRB, &PINB, &PORTB, 0}, // B0 0
+ {&DDRB, &PINB, &PORTB, 1}, // B1 1
+ {&DDRB, &PINB, &PORTB, 2}, // B2 2
+ {&DDRB, &PINB, &PORTB, 3}, // B3 3
+ {&DDRB, &PINB, &PORTB, 7}, // B7 4
+ {&DDRD, &PIND, &PORTD, 0}, // D0 5
+ {&DDRD, &PIND, &PORTD, 1}, // D1 6
+ {&DDRD, &PIND, &PORTD, 2}, // D2 7
+ {&DDRD, &PIND, &PORTD, 3}, // D3 8
+ {&DDRC, &PINC, &PORTC, 6}, // C6 9
+ {&DDRC, &PINC, &PORTC, 7}, // C7 10
+ {&DDRD, &PIND, &PORTD, 6}, // D6 11
+ {&DDRD, &PIND, &PORTD, 7}, // D7 12
+ {&DDRB, &PINB, &PORTB, 4}, // B4 13
+ {&DDRB, &PINB, &PORTB, 5}, // B5 14
+ {&DDRB, &PINB, &PORTB, 6}, // B6 15
+ {&DDRF, &PINF, &PORTF, 7}, // F7 16
+ {&DDRF, &PINF, &PORTF, 6}, // F6 17
+ {&DDRF, &PINF, &PORTF, 5}, // F5 18
+ {&DDRF, &PINF, &PORTF, 4}, // F4 19
+ {&DDRF, &PINF, &PORTF, 1}, // F1 20
+ {&DDRF, &PINF, &PORTF, 0}, // F0 21
+ {&DDRD, &PIND, &PORTD, 4}, // D4 22
+ {&DDRD, &PIND, &PORTD, 5}, // D5 23
+ {&DDRE, &PINE, &PORTE, 6} // E6 24
+};
+//------------------------------------------------------------------------------
+#else // CORE_TEENSY
+// Leonardo
+static const pin_map_t pinMap[] = {
+ {&DDRD, &PIND, &PORTD, 2}, // D2 0
+ {&DDRD, &PIND, &PORTD, 3}, // D3 1
+ {&DDRD, &PIND, &PORTD, 1}, // D1 2
+ {&DDRD, &PIND, &PORTD, 0}, // D0 3
+ {&DDRD, &PIND, &PORTD, 4}, // D4 4
+ {&DDRC, &PINC, &PORTC, 6}, // C6 5
+ {&DDRD, &PIND, &PORTD, 7}, // D7 6
+ {&DDRE, &PINE, &PORTE, 6}, // E6 7
+ {&DDRB, &PINB, &PORTB, 4}, // B4 8
+ {&DDRB, &PINB, &PORTB, 5}, // B5 9
+ {&DDRB, &PINB, &PORTB, 6}, // B6 10
+ {&DDRB, &PINB, &PORTB, 7}, // B7 11
+ {&DDRD, &PIND, &PORTD, 6}, // D6 12
+ {&DDRC, &PINC, &PORTC, 7}, // C7 13
+ {&DDRB, &PINB, &PORTB, 3}, // B3 14
+ {&DDRB, &PINB, &PORTB, 1}, // B1 15
+ {&DDRB, &PINB, &PORTB, 2}, // B2 16
+ {&DDRB, &PINB, &PORTB, 0}, // B0 17
+ {&DDRF, &PINF, &PORTF, 7}, // F7 18
+ {&DDRF, &PINF, &PORTF, 6}, // F6 19
+ {&DDRF, &PINF, &PORTF, 5}, // F5 20
+ {&DDRF, &PINF, &PORTF, 4}, // F4 21
+ {&DDRF, &PINF, &PORTF, 1}, // F1 22
+ {&DDRF, &PINF, &PORTF, 0}, // F0 23
+ {&DDRD, &PIND, &PORTD, 4}, // D4 24
+ {&DDRD, &PIND, &PORTD, 7}, // D7 25
+ {&DDRB, &PINB, &PORTB, 4}, // B4 26
+ {&DDRB, &PINB, &PORTB, 5}, // B5 27
+ {&DDRB, &PINB, &PORTB, 6}, // B6 28
+ {&DDRD, &PIND, &PORTD, 6} // D6 29
+};
+#endif // CORE_TEENSY
+//------------------------------------------------------------------------------
+#elif defined(__AVR_AT90USB646__)\
+|| defined(__AVR_AT90USB1286__)
+// Teensy++ 1.0 & 2.0
+static const pin_map_t pinMap[] = {
+ {&DDRD, &PIND, &PORTD, 0}, // D0 0
+ {&DDRD, &PIND, &PORTD, 1}, // D1 1
+ {&DDRD, &PIND, &PORTD, 2}, // D2 2
+ {&DDRD, &PIND, &PORTD, 3}, // D3 3
+ {&DDRD, &PIND, &PORTD, 4}, // D4 4
+ {&DDRD, &PIND, &PORTD, 5}, // D5 5
+ {&DDRD, &PIND, &PORTD, 6}, // D6 6
+ {&DDRD, &PIND, &PORTD, 7}, // D7 7
+ {&DDRE, &PINE, &PORTE, 0}, // E0 8
+ {&DDRE, &PINE, &PORTE, 1}, // E1 9
+ {&DDRC, &PINC, &PORTC, 0}, // C0 10
+ {&DDRC, &PINC, &PORTC, 1}, // C1 11
+ {&DDRC, &PINC, &PORTC, 2}, // C2 12
+ {&DDRC, &PINC, &PORTC, 3}, // C3 13
+ {&DDRC, &PINC, &PORTC, 4}, // C4 14
+ {&DDRC, &PINC, &PORTC, 5}, // C5 15
+ {&DDRC, &PINC, &PORTC, 6}, // C6 16
+ {&DDRC, &PINC, &PORTC, 7}, // C7 17
+ {&DDRE, &PINE, &PORTE, 6}, // E6 18
+ {&DDRE, &PINE, &PORTE, 7}, // E7 19
+ {&DDRB, &PINB, &PORTB, 0}, // B0 20
+ {&DDRB, &PINB, &PORTB, 1}, // B1 21
+ {&DDRB, &PINB, &PORTB, 2}, // B2 22
+ {&DDRB, &PINB, &PORTB, 3}, // B3 23
+ {&DDRB, &PINB, &PORTB, 4}, // B4 24
+ {&DDRB, &PINB, &PORTB, 5}, // B5 25
+ {&DDRB, &PINB, &PORTB, 6}, // B6 26
+ {&DDRB, &PINB, &PORTB, 7}, // B7 27
+ {&DDRA, &PINA, &PORTA, 0}, // A0 28
+ {&DDRA, &PINA, &PORTA, 1}, // A1 29
+ {&DDRA, &PINA, &PORTA, 2}, // A2 30
+ {&DDRA, &PINA, &PORTA, 3}, // A3 31
+ {&DDRA, &PINA, &PORTA, 4}, // A4 32
+ {&DDRA, &PINA, &PORTA, 5}, // A5 33
+ {&DDRA, &PINA, &PORTA, 6}, // A6 34
+ {&DDRA, &PINA, &PORTA, 7}, // A7 35
+ {&DDRE, &PINE, &PORTE, 4}, // E4 36
+ {&DDRE, &PINE, &PORTE, 5}, // E5 37
+ {&DDRF, &PINF, &PORTF, 0}, // F0 38
+ {&DDRF, &PINF, &PORTF, 1}, // F1 39
+ {&DDRF, &PINF, &PORTF, 2}, // F2 40
+ {&DDRF, &PINF, &PORTF, 3}, // F3 41
+ {&DDRF, &PINF, &PORTF, 4}, // F4 42
+ {&DDRF, &PINF, &PORTF, 5}, // F5 43
+ {&DDRF, &PINF, &PORTF, 6}, // F6 44
+ {&DDRF, &PINF, &PORTF, 7} // F7 45
+};
+//------------------------------------------------------------------------------
+#else // CPU type
+#error unknown CPU type
+#endif // CPU type
+//------------------------------------------------------------------------------
+/** count of pins */
+static const uint8_t digitalPinCount = sizeof(pinMap)/sizeof(pin_map_t);
+//==============================================================================
+/** generate bad pin number error */
+void badPinNumber(void)
+ __attribute__((error("Pin number is too large or not a constant")));
+//------------------------------------------------------------------------------
+/** Check for valid pin number
+ * @param[in] pin Number of pin to be checked.
+ */
+static inline __attribute__((always_inline))
+void badPinCheck(uint8_t pin) {
+ if (!__builtin_constant_p(pin) || pin >= digitalPinCount) {
+ badPinNumber();
+ }
+}
+//------------------------------------------------------------------------------
+/** fast write helper
+ * @param[in] address I/O register address
+ * @param[in] bit bit number to write
+ * @param[in] level value for bit
+ */
+static inline __attribute__((always_inline))
+void fastBitWriteSafe(volatile uint8_t* address, uint8_t bit, bool level) {
+ uint8_t oldSREG;
+ if (address > (uint8_t*)0X5F) {
+ oldSREG = SREG;
+ cli();
+ }
+ if (level) {
+ *address |= 1 << bit;
+ } else {
+ *address &= ~(1 << bit);
+ }
+ if (address > (uint8_t*)0X5F) {
+ SREG = oldSREG;
+ }
+}
+//------------------------------------------------------------------------------
+/** read pin value
+ * @param[in] pin Arduino pin number
+ * @return value read
+ */
+static inline __attribute__((always_inline))
+bool fastDigitalRead(uint8_t pin) {
+ badPinCheck(pin);
+ return (*pinMap[pin].pin >> pinMap[pin].bit) & 1;
+}
+//------------------------------------------------------------------------------
+/** toggle a pin
+ * @param[in] pin Arduino pin number
+ *
+ * If the pin is in output mode toggle the pin level.
+ * If the pin is in input mode toggle the state of the 20K pullup.
+ */
+static inline __attribute__((always_inline))
+void fastDigitalToggle(uint8_t pin) {
+ badPinCheck(pin);
+ if (pinMap[pin].pin > (uint8_t*)0X5F) {
+ // must write bit to high address port
+ *pinMap[pin].pin = 1 << pinMap[pin].bit;
+ } else {
+ // will compile to sbi and PIN register will not be read.
+ *pinMap[pin].pin |= 1 << pinMap[pin].bit;
+ }
+}
+//------------------------------------------------------------------------------
+/** Set pin value
+ * @param[in] pin Arduino pin number
+ * @param[in] level value to write
+ */
+static inline __attribute__((always_inline))
+void fastDigitalWrite(uint8_t pin, bool level) {
+ badPinCheck(pin);
+ fastBitWriteSafe(pinMap[pin].port, pinMap[pin].bit, level);
+}
+//------------------------------------------------------------------------------
+/** set pin mode
+ * @param[in] pin Arduino pin number
+ * @param[in] mode if true set output mode else input mode
+ *
+ * fastPinMode does not enable or disable the 20K pullup for input mode.
+ */
+static inline __attribute__((always_inline))
+void fastPinMode(uint8_t pin, bool mode) {
+ badPinCheck(pin);
+ fastBitWriteSafe(pinMap[pin].ddr, pinMap[pin].bit, mode);
+}
+
+#endif // __arm__
+//------------------------------------------------------------------------------
+/** set pin configuration
+ * @param[in] pin Arduino pin number
+ * @param[in] mode If true set output mode else input mode
+ * @param[in] level If mode is output, set level high/low.
+ * If mode is input, enable or disable the pin's 20K pullup.
+ */
+static inline __attribute__((always_inline))
+void fastPinConfig(uint8_t pin, bool mode, bool level) {
+ fastPinMode(pin, mode);
+ fastDigitalWrite(pin, level);
+}
+//==============================================================================
+/**
+ * @class DigitalPin
+ * @brief Fast digital port I/O
+ */
+template<uint8_t PinNumber>
+class DigitalPin {
+ public:
+ //----------------------------------------------------------------------------
+ /** Constructor */
+ DigitalPin() {}
+ //----------------------------------------------------------------------------
+ /** Constructor
+ * @param[in] pinMode if true set output mode else input mode.
+ */
+ explicit DigitalPin(bool pinMode) {
+ mode(pinMode);
+ }
+ //----------------------------------------------------------------------------
+ /** Constructor
+ * @param[in] mode If true set output mode else input mode
+ * @param[in] level If mode is output, set level high/low.
+ * If mode is input, enable or disable the pin's 20K pullup.
+ */
+ DigitalPin(bool mode, bool level) {
+ config(mode, level);
+ }
+ //----------------------------------------------------------------------------
+ /** Asignment operator
+ * @param[in] value If true set the pin's level high else set the
+ * pin's level low.
+ *
+ * @return This DigitalPin instance.
+ */
+ inline DigitalPin & operator = (bool value) __attribute__((always_inline)) {
+ write(value);
+ return *this;
+ }
+ //----------------------------------------------------------------------------
+ /** Parenthesis operator
+ * @return Pin's level
+ */
+ inline operator bool () const __attribute__((always_inline)) {
+ return read();
+ }
+ //----------------------------------------------------------------------------
+ /** set pin configuration
+ * @param[in] mode If true set output mode else input mode
+ * @param[in] level If mode is output, set level high/low.
+ * If mode is input, enable or disable the pin's 20K pullup.
+ */
+ inline __attribute__((always_inline))
+ void config(bool mode, bool level) {
+ fastPinConfig(PinNumber, mode, level);
+ }
+ //----------------------------------------------------------------------------
+ /**
+ * Set pin level high if output mode or enable 20K pullup if input mode.
+ */
+ inline __attribute__((always_inline))
+ void high() {write(true);}
+ //----------------------------------------------------------------------------
+ /**
+ * Set pin level low if output mode or disable 20K pullup if input mode.
+ */
+ inline __attribute__((always_inline))
+ void low() {write(false);}
+ //----------------------------------------------------------------------------
+ /**
+ * Set pin mode
+ * @param[in] pinMode if true set output mode else input mode.
+ *
+ * mode() does not enable or disable the 20K pullup for input mode.
+ */
+ inline __attribute__((always_inline))
+ void mode(bool pinMode) {
+ fastPinMode(PinNumber, pinMode);
+ }
+ //----------------------------------------------------------------------------
+ /** @return Pin's level */
+ inline __attribute__((always_inline))
+ bool read() const {
+ return fastDigitalRead(PinNumber);
+ }
+ //----------------------------------------------------------------------------
+ /** toggle a pin
+ *
+ * If the pin is in output mode toggle the pin's level.
+ * If the pin is in input mode toggle the state of the 20K pullup.
+ */
+ inline __attribute__((always_inline))
+ void toggle() {
+ fastDigitalToggle(PinNumber);
+ }
+ //----------------------------------------------------------------------------
+ /** Write the pin's level.
+ * @param[in] value If true set the pin's level high else set the
+ * pin's level low.
+ */
+ inline __attribute__((always_inline))
+ void write(bool value) {
+ fastDigitalWrite(PinNumber, value);
+ }
+};
+
+//------------------------------------------------------------------------------
+/** Nop for timing. */
+#define nop asm volatile ("nop\n\t")
+//------------------------------------------------------------------------------
+/** Pin Mode for MISO is input.*/
+const bool MISO_MODE = false;
+/** Pullups disabled for MISO are disabled. */
+const bool MISO_LEVEL = false;
+/** Pin Mode for MOSI is output.*/
+const bool MOSI_MODE = true;
+/** Pin Mode for SCK is output. */
+const bool SCK_MODE = true;
+//------------------------------------------------------------------------------
+/**
+ * @class SoftSPI
+ * @brief Fast software SPI.
+ */
+template<uint8_t MisoPin, uint8_t MosiPin, uint8_t SckPin, uint8_t Mode = 0>
+class SoftSPI {
+ public:
+ //----------------------------------------------------------------------------
+ /** Initialize SoftSPI pins. */
+ void begin() {
+ fastPinConfig(MisoPin, MISO_MODE, MISO_LEVEL);
+ fastPinConfig(MosiPin, MOSI_MODE, !MODE_CPHA(Mode));
+ fastPinConfig(SckPin, SCK_MODE, MODE_CPOL(Mode));
+ }
+ //----------------------------------------------------------------------------
+ /** Soft SPI receive byte.
+ * @return Data byte received.
+ */
+ inline __attribute__((always_inline))
+ uint8_t receive() {
+ uint8_t data = 0;
+ receiveBit(7, &data);
+ receiveBit(6, &data);
+ receiveBit(5, &data);
+ receiveBit(4, &data);
+ receiveBit(3, &data);
+ receiveBit(2, &data);
+ receiveBit(1, &data);
+ receiveBit(0, &data);
+ return data;
+ }
+ //----------------------------------------------------------------------------
+ /** Soft SPI send byte.
+ * @param[in] data Data byte to send.
+ */
+ inline __attribute__((always_inline))
+ void send(uint8_t data) {
+ sendBit(7, data);
+ sendBit(6, data);
+ sendBit(5, data);
+ sendBit(4, data);
+ sendBit(3, data);
+ sendBit(2, data);
+ sendBit(1, data);
+ sendBit(0, data);
+ }
+ //----------------------------------------------------------------------------
+ /** Soft SPI transfer byte.
+ * @param[in] txData Data byte to send.
+ * @return Data byte received.
+ */
+ inline __attribute__((always_inline))
+ uint8_t transfer(uint8_t txData) {
+ uint8_t rxData = 0;
+ transferBit(7, &rxData, txData);
+ transferBit(6, &rxData, txData);
+ transferBit(5, &rxData, txData);
+ transferBit(4, &rxData, txData);
+ transferBit(3, &rxData, txData);
+ transferBit(2, &rxData, txData);
+ transferBit(1, &rxData, txData);
+ transferBit(0, &rxData, txData);
+ return rxData;
+ }
+
+ private:
+ //----------------------------------------------------------------------------
+ inline __attribute__((always_inline))
+ bool MODE_CPHA(uint8_t mode) {return (mode & 1) != 0;}
+ inline __attribute__((always_inline))
+ bool MODE_CPOL(uint8_t mode) {return (mode & 2) != 0;}
+ inline __attribute__((always_inline))
+ void receiveBit(uint8_t bit, uint8_t* data) {
+ if (MODE_CPHA(Mode)) {
+ fastDigitalWrite(SckPin, !MODE_CPOL(Mode));
+ }
+ nop;
+ nop;
+ fastDigitalWrite(SckPin,
+ MODE_CPHA(Mode) ? MODE_CPOL(Mode) : !MODE_CPOL(Mode));
+ if (fastDigitalRead(MisoPin)) *data |= 1 << bit;
+ if (!MODE_CPHA(Mode)) {
+ fastDigitalWrite(SckPin, MODE_CPOL(Mode));
+ }
+ }
+ //----------------------------------------------------------------------------
+ inline __attribute__((always_inline))
+ void sendBit(uint8_t bit, uint8_t data) {
+ if (MODE_CPHA(Mode)) {
+ fastDigitalWrite(SckPin, !MODE_CPOL(Mode));
+ }
+ fastDigitalWrite(MosiPin, data & (1 << bit));
+ fastDigitalWrite(SckPin,
+ MODE_CPHA(Mode) ? MODE_CPOL(Mode) : !MODE_CPOL(Mode));
+ nop;
+ nop;
+ if (!MODE_CPHA(Mode)) {
+ fastDigitalWrite(SckPin, MODE_CPOL(Mode));
+ }
+ }
+ //----------------------------------------------------------------------------
+ inline __attribute__((always_inline))
+ void transferBit(uint8_t bit, uint8_t* rxData, uint8_t txData) {
+ if (MODE_CPHA(Mode)) {
+ fastDigitalWrite(SckPin, !MODE_CPOL(Mode));
+ }
+ fastDigitalWrite(MosiPin, txData & (1 << bit));
+ fastDigitalWrite(SckPin,
+ MODE_CPHA(Mode) ? MODE_CPOL(Mode) : !MODE_CPOL(Mode));
+ if (fastDigitalRead(MisoPin)) *rxData |= 1 << bit;
+ if (!MODE_CPHA(Mode)) {
+ fastDigitalWrite(SckPin, MODE_CPOL(Mode));
+ }
+ }
+ //----------------------------------------------------------------------------
+};
+
+
diff --git a/Marlin/spi.h b/Marlin/spi.h
new file mode 100644
index 0000000000000000000000000000000000000000..349246952cadede541c54fbd7c553811d060445e
--- /dev/null
+++ b/Marlin/spi.h
@@ -0,0 +1,68 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef __SPI_H__
+#define __SPI_H__
+
+#include <stdint.h>
+#include "softspi.h"
+
+template<uint8_t MisoPin, uint8_t MosiPin, uint8_t SckPin>
+class Spi {
+ static SoftSPI<MisoPin, MosiPin, SckPin> softSpi;
+ public:
+ inline __attribute__((always_inline))
+ static void init() {
+ softSpi.begin();
+ }
+ inline __attribute__((always_inline))
+ static void send(uint8_t data) {
+ softSpi.send(data);
+ }
+ inline __attribute__((always_inline))
+ static uint8_t receive() {
+ return softSpi.receive();
+ }
+};
+
+
+//hardware spi
+template<>
+class Spi<MISO_PIN, MOSI_PIN, SCK_PIN> {
+ public:
+ inline __attribute__((always_inline))
+ static void init() {
+ OUT_WRITE(SCK_PIN, LOW);
+ OUT_WRITE(MOSI_PIN, HIGH);
+ SET_INPUT(MISO_PIN);
+ WRITE(MISO_PIN, HIGH);
+ }
+ inline __attribute__((always_inline))
+ static uint8_t receive() {
+ SPDR = 0;
+ for (;!TEST(SPSR, SPIF););
+ return SPDR;
+ }
+
+};
+
+#endif
diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp
index 909231fc0bb75316a8eb4af35cd24542b65d18e7..18ce9e26f1c03cd136f17b8aadbfbb15a2fbda40 100644
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@@ -31,6 +31,7 @@
#include "temperature.h"
#include "thermistortables.h"
#include "language.h"
+#include "spi.h"
#if ENABLED(BABYSTEPPING)
#include "stepper.h"
#endif
@@ -942,6 +943,15 @@ void Temperature::updateTemperaturesFromRawValues() {
#endif
+#if ENABLED(HEATER_0_USES_MAX6675)
+ #ifndef MAX6675_SCK_PIN
+ #define MAX6675_SCK_PIN SCK_PIN
+ #endif
+ #ifndef MAX6675_DO_PIN
+ #define MAX6675_DO_PIN MISO_PIN
+ #endif
+ Spi<MAX6675_DO_PIN, MOSI_PIN, MAX6675_SCK_PIN> max6675_spi;
+#endif
/**
* Initialize the temperature manager
@@ -1007,11 +1017,13 @@ void Temperature::init() {
OUT_WRITE(SCK_PIN, LOW);
OUT_WRITE(MOSI_PIN, HIGH);
SET_INPUT_PULLUP(MISO_PIN);
- OUT_WRITE(SS_PIN, HIGH);
+ max6675_spi.init();
+
+ OUT_WRITE(SS_PIN, HIGH);
OUT_WRITE(MAX6675_SS, HIGH);
- #endif //HEATER_0_USES_MAX6675
+ #endif // HEATER_0_USES_MAX6675
#ifdef DIDR2
#define ANALOG_SELECT(pin) do{ if (pin < 8) SBI(DIDR0, pin); else SBI(DIDR2, pin - 8); }while(0)
@@ -1356,9 +1368,7 @@ void Temperature::disable_all_heaters() {
// Read a big-endian temperature value
max6675_temp = 0;
for (uint8_t i = sizeof(max6675_temp); i--;) {
- SPDR = 0;
- for (;!TEST(SPSR, SPIF););
- max6675_temp |= SPDR;
+ max6675_temp |= max6675_spi.receive();
if (i > 0) max6675_temp <<= 8; // shift left if not the last byte
}