189 lines
7.3 KiB
C
189 lines
7.3 KiB
C
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////////////////////////////////////////////////////
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// TFT_eSPI generic driver functions //
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////////////////////////////////////////////////////
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// This is a generic driver for Arduino boards, it supports SPI interface displays
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// 8 bit parallel interface to TFT is not supported for generic processors
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#ifndef _TFT_eSPI_GENERICH_
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#define _TFT_eSPI_GENERICH_
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// Processor ID reported by getSetup()
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#define PROCESSOR_ID 0x0000
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// Include processor specific header
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// None
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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 startWrite and endWrite functions
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#define DMA_BUSY_CHECK // Not used so leave blank
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// To be safe, SUPPORT_TRANSACTIONS is assumed mandatory
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#if !defined (SUPPORT_TRANSACTIONS)
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#define SUPPORT_TRANSACTIONS
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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
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// If smooth fonts are enabled the filing system may need to be loaded
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#ifdef SMOOTH_FONT
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// Call up the 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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#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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#define DC_C digitalWrite(TFT_DC, LOW)
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#define DC_D digitalWrite(TFT_DC, HIGH)
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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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#define CS_L digitalWrite(TFT_CS, LOW)
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#define CS_H digitalWrite(TFT_CS, HIGH)
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Make sure TFT_RD is defined if not used to avoid an error message
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////////////////////////////////////////////////////////////////////////////////////////
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#ifndef TFT_RD
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#define TFT_RD -1
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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 digitalWrite(TFT_WR, LOW)
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#define WR_H digitalWrite(TFT_WR, HIGH)
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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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#if !defined TOUCH_CS || (TOUCH_CS < 0)
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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
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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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#ifndef TFT_MISO
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#define TFT_MISO -1
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#endif
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////////////////////////////////////////////////////////////////////////////////////////
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// Macros to write commands/pixel colour data to a SPI ILI948x TFT
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////////////////////////////////////////////////////////////////////////////////////////
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#if defined (SPI_18BIT_DRIVER) // SPI 18 bit colour
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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.transfer16((C)>>16); spi.transfer16((uint16_t)(C))
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// Write two address coordinates
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#define tft_Write_32C(C,D) spi.transfer16(C); spi.transfer16(D)
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// Write same value twice
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#define tft_Write_32D(C) spi.transfer16(C); spi.transfer16(C)
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////////////////////////////////////////////////////////////////////////////////////////
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// Macros to write commands/pixel colour data to other displays
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////////////////////////////////////////////////////////////////////////////////////////
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#else
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#if defined (RPI_DISPLAY_TYPE) // RPi TFT type always needs 16 bit transfers
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#define tft_Write_8(C) spi.transfer(C); spi.transfer(C)
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#define tft_Write_16(C) spi.transfer((uint8_t)((C)>>8));spi.transfer((uint8_t)((C)>>0))
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#define tft_Write_16S(C) spi.transfer((uint8_t)((C)>>0));spi.transfer((uint8_t)((C)>>8))
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#define tft_Write_32(C) \
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tft_Write_16((uint16_t) ((C)>>16)); \
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tft_Write_16((uint16_t) ((C)>>0))
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#define tft_Write_32C(C,D) \
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spi.transfer(0); spi.transfer((C)>>8); \
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spi.transfer(0); spi.transfer((C)>>0); \
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spi.transfer(0); spi.transfer((D)>>8); \
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spi.transfer(0); spi.transfer((D)>>0)
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#define tft_Write_32D(C) \
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spi.transfer(0); spi.transfer((C)>>8); \
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spi.transfer(0); spi.transfer((C)>>0); \
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spi.transfer(0); spi.transfer((C)>>8); \
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spi.transfer(0); spi.transfer((C)>>0)
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#else
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#ifdef __AVR__ // AVR processors do not have 16 bit transfer
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#define tft_Write_8(C) {SPDR=(C); while (!(SPSR&_BV(SPIF)));}
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#define tft_Write_16(C) tft_Write_8((uint8_t)((C)>>8));tft_Write_8((uint8_t)((C)>>0))
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#define tft_Write_16S(C) tft_Write_8((uint8_t)((C)>>0));tft_Write_8((uint8_t)((C)>>8))
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#else
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#define tft_Write_8(C) spi.transfer(C)
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#define tft_Write_16(C) spi.transfer16(C)
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#define tft_Write_16S(C) spi.transfer16(((C)>>8) | ((C)<<8))
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#endif // AVR
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#define tft_Write_32(C) \
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tft_Write_16((uint16_t) ((C)>>16)); \
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tft_Write_16((uint16_t) ((C)>>0))
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#define tft_Write_32C(C,D) \
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tft_Write_16((uint16_t) (C)); \
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tft_Write_16((uint16_t) (D))
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#define tft_Write_32D(C) \
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tft_Write_16((uint16_t) (C)); \
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tft_Write_16((uint16_t) (C))
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#endif // RPI_DISPLAY_TYPE
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#endif
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#ifndef tft_Write_16N
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#define tft_Write_16N tft_Write_16
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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_SDA_READ)
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// Use a bit banged function call for STM32 and bi-directional SDA pin
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#define TFT_eSPI_ENABLE_8_BIT_READ // Enable tft_Read_8(void);
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#define SCLK_L digitalWrite(TFT_SCLK, LOW)
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#define SCLK_H digitalWrite(TFT_SCLK, LOW)
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#else
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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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#endif // Header end
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