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mcu_8bit_magic.h
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#ifndef _mcu_8bit_magic_
#define _mcu_8bit_magic_
#include "lcd_mode.h"
#define DELAY7 \
asm volatile( \
"rjmp .+0" "\n\t" \
"rjmp .+0" "\n\t" \
"rjmp .+0" "\n\t" \
"nop" "\n" \
::);
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__) || defined (__AVR_ATmega328__) || defined(__AVR_ATmega8__)
// Arduino Uno, Duemilanove, etc.
#ifdef USE_ADAFRUIT_SHIELD_PIN
// LCD control lines:
// RD (read), WR (write), CD (command/data), CS (chip select)
#define RD_PORT PORTC /*pin A0 */
#define WR_PORT PORTC /*pin A1 */
#define CD_PORT PORTC /*pin A2 */
#define CS_PORT PORTC /*pin A3 */
#define RD_MASK B00000001
#define WR_MASK B00000010
#define CD_MASK B00000100
#define CS_MASK B00001000
#define BMASK 0x2F
#define DMASK 0xD0
// These are macros for I/O operations...
// Write 8-bit value to LCD data lines
#define write8(d) { PORTD = (PORTD & ~DMASK) | ((d) & DMASK); PORTB = (PORTB & ~BMASK) | ((d) & BMASK); WR_STROBE; }
// #define write16(d) {uint8_t h = (d)>>8, l = d; write8(d); write8(l);}
// Read 8-bit value from LCD data lines. The signle argument
// is a destination variable; this isn't a function and doesn't
// return a value in the conventional sense.
#define read8(dst) { RD_ACTIVE; DELAY7; dst = (PIND & DMASK) | (PINB & BMASK); RD_IDLE; }
// #define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
// These set the PORT directions as required before the write and read
// operations. Because write operations are much more common than reads,
// the data-reading functions in the library code set the PORT(s) to
// input before a read, and restore them back to the write state before
// returning. This avoids having to set it for output inside every
// drawing method. The default state has them initialized for writes.
#define setWriteDir() { DDRD |= DMASK; DDRB |= BMASK; }
#define setReadDir() { DDRD &= ~DMASK; DDRB &= ~BMASK; }
#else // Uno w/Breakout board
#define BMASK 0x03
#define DMASK 0xFC
#define write8(d) { PORTD = (PORTD & ~DMASK) | ((d) & DMASK); PORTB = (PORTB & ~BMASK) | ((d) & BMASK); WR_STROBE; }
// #define write16(d) {uint8_t h = (d)>>8, l = d; write8(d); write8(l);}
#define read8(dst) { RD_ACTIVE; DELAY7; dst = (PIND & DMASK) | (PINB & BMASK); RD_IDLE; }
// #define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
#define setWriteDir() { DDRD |= DMASK; DDRB |= BMASK; }
#define setReadDir() { DDRD &= ~DMASK; DDRB &= ~BMASK; }
#endif
#elif defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1280__)
// Arduino Mega, ADK, etc.
#ifdef USE_ADAFRUIT_SHIELD_PIN
#define RD_PORT PORTF
#define WR_PORT PORTF
#define CD_PORT PORTF
#define CS_PORT PORTF
#define RD_MASK B00000001
#define WR_MASK B00000010
#define CD_MASK B00000100
#define CS_MASK B00001000
#define BMASK 0xB0
#define GMASK 0x20
#define HMASK 0x78
#define write8(d) { \
PORTH = (PORTH&~HMASK)|(((d)&(0x03<<6)>>3)|(((d)&0x03)<<5); \
PORTB = (PORTB&~BMASK)|(((d)&((0x01<<5)|(0x03<<2)))<<2); \
PORTG = (PORTG&~HMASK)|(((d)&(0x01<<4)<<1); WR_STROBE; }
// #define write16(d) { uint8_t h = (x)>>8, l = x; write8(h); write8(l); }
#define read8(dst) { \
RD_ACTIVE; \
DELAY7; \
dst = ((PINH & (0x03<<3)) << 3) | ((PINB & BMASK) >> 2) | \
((PING & GMASK) >> 1) | ((PINH & (0x03<<5) >> 5); RD_IDLE; }
// #define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
#define setWriteDir() { DDRH |= HMASK; DDRB |= BMASK; DDRG |= GMASK; }
#define setReadDir() { DDRH &= ~HMASK; DDRB &= ~BMASK; DDRG &= ~GMASK; }
#else // Mega w/Breakout board
#ifndef USE_8BIT_SHIELD_ON_MEGA
#define EMASK 0x38
#define GMASK 0x20
#define HMASK 0x78
#define write8(d) {\
PORTH &= ~HMASK;\
PORTH |= ((d&(0x03<<6))>>3) | ((d&0x03) << 5);\
PORTE &= ~EMASK;\
PORTE |= ((d & (0x03<<2)) << 2) | ((d & (0x01<<5)) >> 2);\
PORTG &= ~GMASK;\
PORTG |= (d & (0x01<<4)) << 1; WR_STROBE; }
// #define write16(d) { uint8_t h = (x)>>8, l = x; write8(h); write8(l); }
#define read8(dst) {\
RD_ACTIVE; DELAY7; \
dst = (PINH & (0x03<<5)) >> 5; \
dst |= (PINH & (0x03<<3)) << 3; \
dst |= (PINE & (0x01<<3)) << 2; \
dst |= (PINE & (0x03<<4)) >> 2; \
dst |= (PING & (0x01<<5)) >> 1;RD_IDLE;}
// #define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
#define setWriteDir() { DDRH |= HMASK;DDRE |= EMASK;DDRG |= GMASK; }
#define setReadDir() { DDRH &= ~HMASK;DDRE &= ~EMASK;DDRG &= ~(GMASK); }
#else
#if USE_8BIT_SHIELD_ON_MEGA
#define AMASK 0xFF
#define write8(d) {\
PORTA = d;WR_STROBE;}
#define read8(dst) {\
RD_ACTIVE; DELAY7; \
dst = PINA;RD_IDLE;}
#define setWriteDir() {DDRA |= AMASK;}
#define setReadDir() {DDRA &= ~AMASK;}
#else
#define CMASK 0xFF
#define write8(d) {\
PORTC = d;WR_STROBE;}
#define read8(dst) {\
RD_ACTIVE; DELAY7; \
dst = PINC;RD_IDLE;}
#define setWriteDir() {DDRC |= CMASK;}
#define setReadDir() {DDRC &= ~CMASK;}
#endif
#endif
#endif
#elif defined(__AVR_ATmega32U4__)
// Arduino Leonardo
#ifdef USE_ADAFRUIT_SHIELD_PIN
#define RD_PORT PORTF
#define WR_PORT PORTF
#define CD_PORT PORTF
#define CS_PORT PORTF
#define RD_MASK B10000000
#define WR_MASK B01000000
#define CD_MASK B00100000
#define CS_MASK B00010000
#define BMASK 0xF0
#define CMASK 0x80
#define DMASK 0x90
#define EMASK 0x40
#define write8(d) { \
PORTE = (PORTE & ~EMASK) | (((d) & (0x1<<7))>>1); \
PORTD = (PORTD & ~DMASK) | (((d) & (0x1<<6))<<1) | ((d) & (0x1<<4)); \
PORTC = (PORTC & ~CMASK) | (((d) & (0x1<<5))<<2); \
PORTB = (PORTB & ~BMASK) | (((d) & ~BMASK)<<4); \
WR_STROBE; }
// #define write16(d) { uint8_t h = (x)>>8, l = x; write8(h); write8(l); }
#define read8(dst) { \
RD_ACTIVE; \
DELAY7; \
dst = ((PINE & EMASK) << 1) | ((PIND & (0x1<<7)) >> 1) | \
((PINC & CMASK) >> 2) | ((PINB & BMASK) >> 4) | \
(PIND & (1<<4));RD_IDLE; }
// #define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
#define setWriteDir() { DDRE |= EMASK; DDRD |= DMASK; DDRC |= CMASK; DDRB |= BMASK; }
#define setReadDir() { DDRE &= ~EMASK; DDRD &= ~DMASK; DDRC &= ~CMASK; DDRB &= ~BMASK; }
#else // Leonardo w/Breakout board
#define BMASK 0x30
#define CMASK 0x40
#define DMASK 0x93
#define EMASK 0x40
#define write8(d) { \
uint8_t dr1 = (d) >> 1, dl1 = (d) << 1; \
PORTE = (PORTE & ~EMASK) | (dr1 & (0x1<<6)); \
PORTD = (PORTD & ~DMASK) | (dl1 & (0x1<<7)) | (((d) & (0x1<<3))>>3) | (dr1 & (0x1<<1)) | ((d) & (0x1<<4)); \
PORTC = (PORTC & ~CMASK) | (dl1 & (0x1<<6)); \
PORTB = (PORTB & ~BMASK) |(((d) & 0x3)<<4); WR_STROBE; }
// #define write16(d) { uint8_t h = (x)>>8, l = x; write8(h); write8(l); }
#define read8(dst) { \
RD_ACTIVE; \
DELAY7; \
dst = (((PINE & EMASK) | (PIND & (0x1<<1)) << 1) | \
(((PINC & CMASK) | (PIND & (0x1<<7)) >> 1) | \
((PIND & 0x1) << 3) | ((PINB & BMASK) >> 4) | \
(PIND & (0x1<<4)); RD_IDLE; }
// #define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
#define setWriteDir() { DDRE |= EMASK; DDRD |= DMASK; DDRC |= CMASK; DDRB |= BMASK; }
#define setReadDir() { DDRE &= ~EMASK; DDRD &= ~DMASK; DDRC &= ~CMASK; DDRB &= ~BMASK; }
#endif
#elif defined(__SAM3X8E__)
// Arduino Due
#ifdef USE_ADAFRUIT_SHIELD_PIN
#define RD_PORT PIOA /*pin A0 */
#define WR_PORT PIOA /*pin A1 */
#define CD_PORT PIOA /*pin A2 */
#define CS_PORT PIOA /*pin A3 */
#define RD_MASK 0x00010000
#define WR_MASK 0x01000000
#define CD_MASK 0x00800000
#define CS_MASK 0x00400000
#define write8(d) { \
PIO_Set(PIOD, (((d) & 0x08)<<(7-3))); \
PIO_Clear(PIOD, (((~d) & 0x08)<<(7-3))); \
PIO_Set(PIOC, (((d) & 0x01)<<(22-0)) | (((d) & 0x02)<<(21-1))| (((d) & 0x04)<<(29-2))| (((d) & 0x10)<<(26-4))| (((d) & 0x40)<<(24-6))| (((d) & 0x80)<<(23-7))); \
PIO_Clear(PIOC, (((~d) & 0x01)<<(22-0)) | (((~d) & 0x02)<<(21-1))| (((~d) & 0x04)<<(29-2))| (((~d) & 0x10)<<(26-4))| (((~d) & 0x40)<<(24-6))| (((~d) & 0x80)<<(23-7))); \
PIO_Set(PIOB, (((d) & 0x20)<<(27-5))); \
PIO_Clear(PIOB, (((~d) & 0x20)<<(27-5))); \
WR_STROBE; }
// #define write16(d) { uint8_t h = (x)>>8, l = x; write8(h); write8(l); }
#define read8(result) { \
RD_ACTIVE; \
delayMicroseconds(1); \
result = (((PIOC->PIO_PDSR & (1<<23)) >> (23-7)) | ((PIOC->PIO_PDSR & (1<<24)) >> (24-6)) | \
((PIOB->PIO_PDSR & (1<<27)) >> (27-5)) | ((PIOC->PIO_PDSR & (1<<26)) >> (26-4)) | \
((PIOD->PIO_PDSR & (1<< 7)) >> ( 7-3)) | ((PIOC->PIO_PDSR & (1<<29)) >> (29-2)) | \
((PIOC->PIO_PDSR & (1<<21)) >> (21-1)) | ((PIOC->PIO_PDSR & (1<<22)) >> (22-0))); \
RD_IDLE;}
// #define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
#define setWriteDir() { \
PIOD->PIO_MDDR |= 0x00000080; /*PIOD->PIO_SODR = 0x00000080;*/ PIOD->PIO_OER |= 0x00000080; PIOD->PIO_PER |= 0x00000080; \
PIOC->PIO_MDDR |= 0x25E00000; /*PIOC->PIO_SODR = 0x25E00000;*/ PIOC->PIO_OER |= 0x25E00000; PIOC->PIO_PER |= 0x25E00000; \
PIOB->PIO_MDDR |= 0x08000000; /*PIOB->PIO_SODR = 0x08000000;*/ PIOB->PIO_OER |= 0x08000000; PIOB->PIO_PER |= 0x08000000; }
#define setReadDir() { \
pmc_enable_periph_clk( ID_PIOD ) ; pmc_enable_periph_clk( ID_PIOC ) ; pmc_enable_periph_clk( ID_PIOB ) ; \
PIOD->PIO_PUDR |= 0x00000080; PIOD->PIO_IFDR |= 0x00000080; PIOD->PIO_ODR |= 0x00000080; PIOD->PIO_PER |= 0x00000080; \
PIOC->PIO_PUDR |= 0x25E00000; PIOC->PIO_IFDR |= 0x25E00000; PIOC->PIO_ODR |= 0x25E00000; PIOC->PIO_PER |= 0x25E00000; \
PIOB->PIO_PUDR |= 0x08000000; PIOB->PIO_IFDR |= 0x08000000; PIOB->PIO_ODR |= 0x08000000; PIOB->PIO_PER |= 0x08000000; }
// Control signals are ACTIVE LOW (idle is HIGH)
// Command/Data: LOW = command, HIGH = data
// These are single-instruction operations and always inline
#define RD_ACTIVE RD_PORT->PIO_CODR = RD_MASK
#define RD_IDLE RD_PORT->PIO_SODR = RD_MASK
#define WR_ACTIVE WR_PORT->PIO_CODR = WR_MASK
#define WR_IDLE WR_PORT->PIO_SODR = WR_MASK
#define CD_COMMAND CD_PORT->PIO_CODR = CD_MASK
#define CD_DATA CD_PORT->PIO_SODR = CD_MASK
#define CS_ACTIVE CS_PORT->PIO_CODR = CS_MASK
#define CS_IDLE CS_PORT->PIO_SODR = CS_MASK
#else // Due w/Breakout board
#define write8(d) { PIO_Set(PIOC, (((d) & 0xFF)<<1)); PIO_Clear(PIOC, (((~d) & 0xFF)<<1)); WR_STROBE; }
// #define write16(d) { uint8_t h = (x)>>8, l = x; write8(h); write8(l); }
#define read8(result) { RD_ACTIVE; delayMicroseconds(1); result = ((PIOC->PIO_PDSR & 0x1FE) >> 1); RD_IDLE;}
// #define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
#define setWriteDir() { PIOC->PIO_MDDR |= 0x000001FE; /*PIOC->PIO_SODR |= 0x000001FE;*/ PIOC->PIO_OER |= 0x000001FE; PIOC->PIO_PER |= 0x000001FE; }
#define setReadDir() { pmc_enable_periph_clk( ID_PIOC ) ; PIOC->PIO_PUDR |= 0x000001FE; PIOC->PIO_IFDR |= 0x000001FE; PIOC->PIO_ODR |= 0x000001FE; PIOC->PIO_PER |= 0x000001FE; }
// When using the TFT breakout board, control pins are configurable.
#define RD_ACTIVE rdPort->PIO_CODR = rdPinSet //PIO_Clear(rdPort, rdPinSet)
#define RD_IDLE rdPort->PIO_SODR = rdPinSet //PIO_Set(rdPort, rdPinSet)
#define WR_ACTIVE wrPort->PIO_CODR = wrPinSet //PIO_Clear(wrPort, wrPinSet)
#define WR_IDLE wrPort->PIO_SODR = wrPinSet //PIO_Set(wrPort, wrPinSet)
#define CD_COMMAND cdPort->PIO_CODR = cdPinSet //PIO_Clear(cdPort, cdPinSet)
#define CD_DATA cdPort->PIO_SODR = cdPinSet //PIO_Set(cdPort, cdPinSet)
#define CS_ACTIVE csPort->PIO_CODR = csPinSet //PIO_Clear(csPort, csPinSet)
#define CS_IDLE csPort->PIO_SODR = csPinSet //PIO_Set(csPort, csPinSet)
#endif
#else
#error "Board type unsupported / not recognized"
#endif
#if !defined(__SAM3X8E__)
// Stuff common to all Arduino AVR board types:
#ifdef USE_ADAFRUIT_SHIELD_PIN
// Control signals are ACTIVE LOW (idle is HIGH)
// Command/Data: LOW = command, HIGH = data
// These are single-instruction operations and always inline
#define RD_ACTIVE RD_PORT &= ~RD_MASK
#define RD_IDLE RD_PORT |= RD_MASK
#define WR_ACTIVE WR_PORT &= ~WR_MASK
#define WR_IDLE WR_PORT |= WR_MASK
#define CD_COMMAND CD_PORT &= ~CD_MASK
#define CD_DATA CD_PORT |= CD_MASK
#define CS_ACTIVE CS_PORT &= ~CS_MASK
#define CS_IDLE CS_PORT |= CS_MASK
#else // Breakout board
// When using the TFT breakout board, control pins are configurable.
#define RD_ACTIVE *rdPort &= rdPinUnset
#define RD_IDLE *rdPort |= rdPinSet
#define WR_ACTIVE *wrPort &= wrPinUnset
#define WR_IDLE *wrPort |= wrPinSet
#define CD_COMMAND *cdPort &= cdPinUnset
#define CD_DATA *cdPort |= cdPinSet
#define CS_ACTIVE *csPort &= csPinUnset
#define CS_IDLE *csPort |= csPinSet
#endif
#endif
// Data write strobe, ~2 instructions and always inline
#define WR_STROBE { WR_ACTIVE; WR_IDLE; }
#define RD_STROBE {RD_IDLE; RD_ACTIVE;RD_ACTIVE;RD_ACTIVE;}
#define write16(d) { uint8_t h = (d)>>8, l = d; write8(h); write8(l); }
#define read16(dst) { uint8_t hi; read8(hi); read8(dst); dst |= (hi << 8); }
#define writeCmd8(x){ CD_COMMAND; write8(x); CD_DATA; }
#define writeData8(x){ write8(x) }
#define writeCmd16(x){ CD_COMMAND; write16(x); CD_DATA; }
#define writeData16(x){ write16(x) }
// These higher-level operations are usually functionalized,
// except on Mega where's there's gobs and gobs of program space.
// Set value of TFT register: 8-bit address, 8-bit value
#define writeCmdData8(a, d) { CD_COMMAND; write8(a); CD_DATA; write8(d); }
// Set value of TFT register: 16-bit address, 16-bit value
// See notes at top about macro expansion, hence hi & lo temp vars
#define writeCmdData16(a, d) { \
uint8_t hi, lo; \
hi = (a) >> 8; lo = (a); CD_COMMAND; write8(hi); write8(lo); \
hi = (d) >> 8; lo = (d); CD_DATA ; write8(hi); write8(lo); }
// Set value of 2 TFT registers: Two 8-bit addresses (hi & lo), 16-bit value
//#define writeRegisterPairInline(aH, aL, d) { \
// uint8_t hi = (d) >> 8, lo = (d); \
// CD_COMMAND; write8(aH); CD_DATA; write8(hi); \
// CD_COMMAND; write8(aL); CD_DATA; write8(lo); }
#endif // _mcu_8bit_magic_