Add software spi support for max6675
This commit is contained in:
Paweł Stawicki
Scott Lahteine
parent
191fec009f
commit
44cdebb8f1
770
Marlin/softspi.h
Normal file
770
Marlin/softspi.h
Normal file
@ -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));
|
||||
}
|
||||
}
|
||||
//----------------------------------------------------------------------------
|
||||
};
|
||||
|
||||
|
||||
68
Marlin/spi.h
Normal file
68
Marlin/spi.h
Normal file
@ -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
|
||||
@ -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
|
||||
@ -1007,8 +1017,10 @@ 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
|
||||
@ -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
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user