348 lines
15 KiB
C
348 lines
15 KiB
C
////////////////////////////////////////////////////
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// TFT_eSPI driver functions for ESP32 processors //
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////////////////////////////////////////////////////
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#ifndef _TFT_eSPI_ESP32H_
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#define _TFT_eSPI_ESP32H_
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// Processor ID reported by getSetup()
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#define PROCESSOR_ID 0x32
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// Include processor specific header
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#include "soc/spi_reg.h"
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// Processor specific code used by SPI bus transaction startWrite and endWrite functions
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#define SET_BUS_WRITE_MODE // Not used
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#define SET_BUS_READ_MODE // Not used
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// Code to check if DMA is busy, used by SPI bus transaction transaction and endWrite functions
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#define DMA_BUSY_CHECK // DMA not implemented for this processor (yet)
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// SUPPORT_TRANSACTIONS is mandatory for ESP32 so the hal mutex is toggled
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#if !defined (SUPPORT_TRANSACTIONS)
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#define SUPPORT_TRANSACTIONS
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#endif
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// ESP32 specific SPI port selection
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#ifdef USE_HSPI_PORT
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#define SPI_PORT HSPI
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#else
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#define SPI_PORT VSPI
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#endif
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#ifdef RPI_DISPLAY_TYPE
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#define CMD_BITS (16-1)
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#else
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#define CMD_BITS (8-1)
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#endif
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// Initialise processor specific SPI functions, used by init()
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#define INIT_TFT_DATA_BUS // Not used
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// Define a generic flag for 8 bit parallel
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#if defined (ESP32_PARALLEL) // Specific to ESP32 for backwards compatibility
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#define TFT_PARALLEL_8_BIT // Generic parallel flag
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#endif
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// If smooth font is used then it is likely SPIFFS will be needed
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#ifdef SMOOTH_FONT
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// Call up the SPIFFS (SPI FLASH Filing System) for the anti-aliased fonts
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#define FS_NO_GLOBALS
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#include <FS.h>
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#include "SPIFFS.h" // ESP32 only
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#define FONT_FS_AVAILABLE
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Define the DC (TFT Data/Command or Register Select (RS))pin drive code
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////////////////////////////////////////////////////////////////////////////////////////
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#ifndef TFT_DC
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#define DC_C // No macro allocated so it generates no code
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#define DC_D // No macro allocated so it generates no code
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#else
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#if defined (TFT_PARALLEL_8_BIT)
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#define DC_C GPIO.out_w1tc = (1 << TFT_DC)
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#define DC_D GPIO.out_w1ts = (1 << TFT_DC)
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#else
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#if TFT_DC >= 32
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#ifdef RPI_DISPLAY_TYPE // RPi displays need a slower DC change
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#define DC_C GPIO.out1_w1ts.val = (1 << (TFT_DC - 32)); \
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GPIO.out1_w1tc.val = (1 << (TFT_DC - 32))
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#define DC_D GPIO.out1_w1tc.val = (1 << (TFT_DC - 32)); \
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GPIO.out1_w1ts.val = (1 << (TFT_DC - 32))
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#else
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#define DC_C GPIO.out1_w1tc.val = (1 << (TFT_DC - 32))//;GPIO.out1_w1tc.val = (1 << (TFT_DC - 32))
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#define DC_D GPIO.out1_w1ts.val = (1 << (TFT_DC - 32))//;GPIO.out1_w1ts.val = (1 << (TFT_DC - 32))
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#endif
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#elif TFT_DC >= 0
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#ifdef RPI_DISPLAY_TYPE // RPi ILI9486 display needs a slower DC change
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#define DC_C GPIO.out_w1tc = (1 << TFT_DC); \
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GPIO.out_w1tc = (1 << TFT_DC)
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#define DC_D GPIO.out_w1tc = (1 << TFT_DC); \
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GPIO.out_w1ts = (1 << TFT_DC)
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#elif defined (RPI_DISPLAY_TYPE) // Other RPi displays need a slower C->D change
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#define DC_C GPIO.out_w1tc = (1 << TFT_DC)
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#define DC_D GPIO.out_w1tc = (1 << TFT_DC); \
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GPIO.out_w1ts = (1 << TFT_DC)
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#else
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#define DC_C GPIO.out_w1tc = (1 << TFT_DC)//;GPIO.out_w1tc = (1 << TFT_DC)
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#define DC_D GPIO.out_w1ts = (1 << TFT_DC)//;GPIO.out_w1ts = (1 << TFT_DC)
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#endif
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#else
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#define DC_C
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#define DC_D
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#endif
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#endif
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Define the CS (TFT chip select) pin drive code
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////////////////////////////////////////////////////////////////////////////////////////
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#ifndef TFT_CS
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#define CS_L // No macro allocated so it generates no code
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#define CS_H // No macro allocated so it generates no code
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#else
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#if defined (TFT_PARALLEL_8_BIT)
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#if TFT_CS >= 32
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#define CS_L GPIO.out1_w1tc.val = (1 << (TFT_CS - 32))
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#define CS_H GPIO.out1_w1ts.val = (1 << (TFT_CS - 32))
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#elif TFT_CS >= 0
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#define CS_L GPIO.out_w1tc = (1 << TFT_CS)
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#define CS_H GPIO.out_w1ts = (1 << TFT_CS)
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#else
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#define CS_L
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#define CS_H
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#endif
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#else
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#if TFT_CS >= 32
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#ifdef RPI_DISPLAY_TYPE // RPi ILI9486 display needs a slower CS change
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#define CS_L GPIO.out1_w1ts.val = (1 << (TFT_CS - 32)); \
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GPIO.out1_w1tc.val = (1 << (TFT_CS - 32))
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#define CS_H GPIO.out1_w1tc.val = (1 << (TFT_CS - 32)); \
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GPIO.out1_w1ts.val = (1 << (TFT_CS - 32))
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#else
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#define CS_L GPIO.out1_w1tc.val = (1 << (TFT_CS - 32)); GPIO.out1_w1tc.val = (1 << (TFT_CS - 32))
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#define CS_H GPIO.out1_w1ts.val = (1 << (TFT_CS - 32))//;GPIO.out1_w1ts.val = (1 << (TFT_CS - 32))
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#endif
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#elif TFT_CS >= 0
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#ifdef RPI_DISPLAY_TYPE // RPi ILI9486 display needs a slower CS change
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#define CS_L GPIO.out_w1ts = (1 << TFT_CS); GPIO.out_w1tc = (1 << TFT_CS)
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#define CS_H GPIO.out_w1tc = (1 << TFT_CS); GPIO.out_w1ts = (1 << TFT_CS)
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#else
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#define CS_L GPIO.out_w1tc = (1 << TFT_CS);GPIO.out_w1tc = (1 << TFT_CS)
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#define CS_H GPIO.out_w1ts = (1 << TFT_CS)//;GPIO.out_w1ts = (1 << TFT_CS)
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#endif
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#else
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#define CS_L
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#define CS_H
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#endif
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#endif
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Define the WR (TFT Write) pin drive code
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////////////////////////////////////////////////////////////////////////////////////////
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#ifdef TFT_WR
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#define WR_L GPIO.out_w1tc = (1 << TFT_WR)
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#define WR_H GPIO.out_w1ts = (1 << TFT_WR)
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Define the touch screen chip select pin drive code
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////////////////////////////////////////////////////////////////////////////////////////
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#ifndef TOUCH_CS
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#define T_CS_L // No macro allocated so it generates no code
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#define T_CS_H // No macro allocated so it generates no code
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#else // XPT2046 is slow, so use slower digitalWrite here
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#define T_CS_L digitalWrite(TOUCH_CS, LOW)
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#define T_CS_H digitalWrite(TOUCH_CS, HIGH)
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Make sure TFT_MISO is defined if not used to avoid an error message
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////////////////////////////////////////////////////////////////////////////////////////
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#if !defined (TFT_PARALLEL_8_BIT)
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#ifndef TFT_MISO
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#define TFT_MISO -1
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#endif
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Define the parallel bus interface chip pin drive code
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////////////////////////////////////////////////////////////////////////////////////////
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#if defined (TFT_PARALLEL_8_BIT)
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// Create a bit set lookup table for data bus - wastes 1kbyte of RAM but speeds things up dramatically
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// can then use e.g. GPIO.out_w1ts = set_mask(0xFF); to set data bus to 0xFF
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#define CONSTRUCTOR_INIT_TFT_DATA_BUS \
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for (int32_t c = 0; c<256; c++) \
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{ \
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xset_mask[c] = 0; \
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if ( c & 0x01 ) xset_mask[c] |= (1 << TFT_D0); \
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if ( c & 0x02 ) xset_mask[c] |= (1 << TFT_D1); \
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if ( c & 0x04 ) xset_mask[c] |= (1 << TFT_D2); \
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if ( c & 0x08 ) xset_mask[c] |= (1 << TFT_D3); \
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if ( c & 0x10 ) xset_mask[c] |= (1 << TFT_D4); \
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if ( c & 0x20 ) xset_mask[c] |= (1 << TFT_D5); \
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if ( c & 0x40 ) xset_mask[c] |= (1 << TFT_D6); \
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if ( c & 0x80 ) xset_mask[c] |= (1 << TFT_D7); \
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} \
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// Mask for the 8 data bits to set pin directions
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#define dir_mask ((1 << TFT_D0) | (1 << TFT_D1) | (1 << TFT_D2) | (1 << TFT_D3) | (1 << TFT_D4) | (1 << TFT_D5) | (1 << TFT_D6) | (1 << TFT_D7))
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// Data bits and the write line are cleared to 0 in one step
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#define clr_mask (dir_mask | (1 << TFT_WR))
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// A lookup table is used to set the different bit patterns, this uses 1kByte of RAM
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#define set_mask(C) xset_mask[C] // 63fps Sprite rendering test 33% faster, graphicstest only 1.8% faster than shifting in real time
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// Real-time shifting alternative to above to save 1KByte RAM, 47 fps Sprite rendering test
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/*#define set_mask(C) (((C)&0x80)>>7)<<TFT_D7 | (((C)&0x40)>>6)<<TFT_D6 | (((C)&0x20)>>5)<<TFT_D5 | (((C)&0x10)>>4)<<TFT_D4 | \
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(((C)&0x08)>>3)<<TFT_D3 | (((C)&0x04)>>2)<<TFT_D2 | (((C)&0x02)>>1)<<TFT_D1 | (((C)&0x01)>>0)<<TFT_D0
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//*/
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// Write 8 bits to TFT
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#define tft_Write_8(C) GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t)(C)); WR_H
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// Write 16 bits to TFT
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#define tft_Write_16(C) GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t)((C) >> 8)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t)((C) >> 0)); WR_H
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// 16 bit write with swapped bytes
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#define tft_Write_16S(C) GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 0)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 8)); WR_H
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// Write 32 bits to TFT
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#define tft_Write_32(C) GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 24)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 16)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 8)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 0)); WR_H
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// Write two concatenated 16 bit values to TFT
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#define tft_Write_32C(C,D) GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 8)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 0)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((D) >> 8)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((D) >> 0)); WR_H
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// Write 16 bit value twice to TFT - used by drawPixel()
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#define tft_Write_32D(C) GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 8)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 0)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 8)); WR_H; \
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GPIO.out_w1tc = clr_mask; GPIO.out_w1ts = set_mask((uint8_t) ((C) >> 0)); WR_H
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// Read pin
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#ifdef TFT_RD
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#define RD_L GPIO.out_w1tc = (1 << TFT_RD)
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//#define RD_L digitalWrite(TFT_WR, LOW)
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#define RD_H GPIO.out_w1ts = (1 << TFT_RD)
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//#define RD_H digitalWrite(TFT_WR, HIGH)
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Macros to write commands/pixel colour data to an ILI9488 TFT
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////////////////////////////////////////////////////////////////////////////////////////
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#elif defined (ILI9488_DRIVER) // 16 bit colour converted to 3 bytes for 18 bit RGB
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// Write 8 bits to TFT
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#define tft_Write_8(C) spi.transfer(C)
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// Convert 16 bit colour to 18 bit and write in 3 bytes
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#define tft_Write_16(C) spi.transfer(((C) & 0xF800)>>8); \
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spi.transfer(((C) & 0x07E0)>>3); \
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spi.transfer(((C) & 0x001F)<<3)
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// Convert swapped byte 16 bit colour to 18 bit and write in 3 bytes
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#define tft_Write_16S(C) spi.transfer((C) & 0xF8); \
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spi.transfer(((C) & 0xE000)>>11 | ((C) & 0x07)<<5); \
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spi.transfer(((C) & 0x1F00)>>5)
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// Write 32 bits to TFT
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#define tft_Write_32(C) spi.write32(C)
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// Write two concatenated 16 bit values to TFT
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#define tft_Write_32C(C,D) spi.write32((C)<<16 | (D))
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// Write 16 bit value twice to TFT
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#define tft_Write_32D(C) spi.write32((C)<<16 | (C))
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////////////////////////////////////////////////////////////////////////////////////////
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// Macros to write commands/pixel colour data to an Raspberry Pi TFT
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////////////////////////////////////////////////////////////////////////////////////////
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#elif defined (RPI_DISPLAY_TYPE)
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// ESP32 low level SPI writes for 8, 16 and 32 bit values
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// to avoid the function call overhead
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#define TFT_WRITE_BITS(D, B) \
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WRITE_PERI_REG(SPI_MOSI_DLEN_REG(SPI_PORT), B-1); \
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WRITE_PERI_REG(SPI_W0_REG(SPI_PORT), D); \
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SET_PERI_REG_MASK(SPI_CMD_REG(SPI_PORT), SPI_USR); \
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while (READ_PERI_REG(SPI_CMD_REG(SPI_PORT))&SPI_USR);
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// Write 8 bits
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#define tft_Write_8(C) TFT_WRITE_BITS((C)<<8, 16)
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// Write 16 bits with corrected endianess for 16 bit colours
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#define tft_Write_16(C) TFT_WRITE_BITS((C)<<8 | (C)>>8, 16)
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// Write 16 bits
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#define tft_Write_16S(C) TFT_WRITE_BITS(C, 16)
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// Write 32 bits
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#define tft_Write_32(C) TFT_WRITE_BITS(C, 32)
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// Write two address coordinates
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#define tft_Write_32C(C,D) TFT_WRITE_BITS((C)<<24 | (C), 32); \
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TFT_WRITE_BITS((D)<<24 | (D), 32)
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// Write same value twice
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#define tft_Write_32D(C) tft_Write_32C(C,C)
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////////////////////////////////////////////////////////////////////////////////////////
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// Macros for all other SPI displays
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////////////////////////////////////////////////////////////////////////////////////////
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#else
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// ESP32 low level SPI writes for 8, 16 and 32 bit values
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// to avoid the function call overhead
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#define TFT_WRITE_BITS(D, B) \
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WRITE_PERI_REG(SPI_MOSI_DLEN_REG(SPI_PORT), B-1); \
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WRITE_PERI_REG(SPI_W0_REG(SPI_PORT), D); \
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SET_PERI_REG_MASK(SPI_CMD_REG(SPI_PORT), SPI_USR); \
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while (READ_PERI_REG(SPI_CMD_REG(SPI_PORT))&SPI_USR);
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// Write 8 bits
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#define tft_Write_8(C) TFT_WRITE_BITS(C, 8)
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// Write 16 bits with corrected endianess for 16 bit colours
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#define tft_Write_16(C) TFT_WRITE_BITS((C)<<8 | (C)>>8, 16)
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// Write 16 bits
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#define tft_Write_16S(C) TFT_WRITE_BITS(C, 16)
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// Write 32 bits
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#define tft_Write_32(C) TFT_WRITE_BITS(C, 32)
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// Write two address coordinates
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#define tft_Write_32C(C,D) TFT_WRITE_BITS((uint16_t)((D)<<8 | (D)>>8)<<16 | (uint16_t)((C)<<8 | (C)>>8), 32)
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// Write same value twice
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#define tft_Write_32D(C) TFT_WRITE_BITS((uint16_t)((C)<<8 | (C)>>8)<<16 | (uint16_t)((C)<<8 | (C)>>8), 32)
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Macros to read from display using SPI or software SPI
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////////////////////////////////////////////////////////////////////////////////////////
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#if !defined (TFT_PARALLEL_8_BIT)
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// Read from display using SPI or software SPI
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// Use a SPI read transfer
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#define tft_Read_8() spi.transfer(0)
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#endif
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// Concatenate a byte sequence A,B,C,D to CDAB, P is a uint8_t pointer
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#define DAT8TO32(P) ( (uint32_t)P[0]<<8 | P[1] | P[2]<<24 | P[3]<<16 )
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#endif // Header end
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