//////////////////////////////////////////////////// // TFT_eSPI generic driver functions // //////////////////////////////////////////////////// // This is a generic driver for Arduino boards, it supports SPI interface displays // 8 bit parallel interface to TFT is not supported for generic processors #ifndef _TFT_eSPI_GENERICH_ #define _TFT_eSPI_GENERICH_ // Processor ID reported by getSetup() #define PROCESSOR_ID 0x0000 // Include processor specific header // None // Processor specific code used by SPI bus transaction startWrite and endWrite functions #define SET_BUS_WRITE_MODE // Not used #define SET_BUS_READ_MODE // Not used // Code to check if DMA is busy, used by SPI bus transaction startWrite and endWrite functions #define DMA_BUSY_CHECK // Not used so leave blank // To be safe, SUPPORT_TRANSACTIONS is assumed mandatory #if !defined (SUPPORT_TRANSACTIONS) #define SUPPORT_TRANSACTIONS #endif // Initialise processor specific SPI functions, used by init() #define INIT_TFT_DATA_BUS // If smooth fonts are enabled the filing system may need to be loaded #ifdef SMOOTH_FONT // Call up the filing system for the anti-aliased fonts //#define FS_NO_GLOBALS //#include #endif //////////////////////////////////////////////////////////////////////////////////////// // Define the DC (TFT Data/Command or Register Select (RS))pin drive code //////////////////////////////////////////////////////////////////////////////////////// #ifndef TFT_DC #define DC_C // No macro allocated so it generates no code #define DC_D // No macro allocated so it generates no code #else #define DC_C digitalWrite(TFT_DC, LOW) #define DC_D digitalWrite(TFT_DC, HIGH) #endif //////////////////////////////////////////////////////////////////////////////////////// // Define the CS (TFT chip select) pin drive code //////////////////////////////////////////////////////////////////////////////////////// #ifndef TFT_CS #define CS_L // No macro allocated so it generates no code #define CS_H // No macro allocated so it generates no code #else #define CS_L digitalWrite(TFT_CS, LOW) #define CS_H digitalWrite(TFT_CS, HIGH) #endif //////////////////////////////////////////////////////////////////////////////////////// // Make sure TFT_RD is defined if not used to avoid an error message //////////////////////////////////////////////////////////////////////////////////////// #ifndef TFT_RD #define TFT_RD -1 #endif //////////////////////////////////////////////////////////////////////////////////////// // Define the WR (TFT Write) pin drive code //////////////////////////////////////////////////////////////////////////////////////// #ifdef TFT_WR #define WR_L digitalWrite(TFT_WR, LOW) #define WR_H digitalWrite(TFT_WR, HIGH) #endif //////////////////////////////////////////////////////////////////////////////////////// // Define the touch screen chip select pin drive code //////////////////////////////////////////////////////////////////////////////////////// #if !defined TOUCH_CS || (TOUCH_CS < 0) #define T_CS_L // No macro allocated so it generates no code #define T_CS_H // No macro allocated so it generates no code #else #define T_CS_L digitalWrite(TOUCH_CS, LOW) #define T_CS_H digitalWrite(TOUCH_CS, HIGH) #endif //////////////////////////////////////////////////////////////////////////////////////// // Make sure TFT_MISO is defined if not used to avoid an error message //////////////////////////////////////////////////////////////////////////////////////// #ifndef TFT_MISO #define TFT_MISO -1 #endif //////////////////////////////////////////////////////////////////////////////////////// // Macros to write commands/pixel colour data to a SPI ILI948x TFT //////////////////////////////////////////////////////////////////////////////////////// #if defined (SPI_18BIT_DRIVER) // SPI 18 bit colour // Write 8 bits to TFT #define tft_Write_8(C) spi.transfer(C) // Convert 16 bit colour to 18 bit and write in 3 bytes #define tft_Write_16(C) spi.transfer(((C) & 0xF800)>>8); \ spi.transfer(((C) & 0x07E0)>>3); \ spi.transfer(((C) & 0x001F)<<3) // Convert swapped byte 16 bit colour to 18 bit and write in 3 bytes #define tft_Write_16S(C) spi.transfer((C) & 0xF8); \ spi.transfer(((C) & 0xE000)>>11 | ((C) & 0x07)<<5); \ spi.transfer(((C) & 0x1F00)>>5) // Write 32 bits to TFT #define tft_Write_32(C) spi.transfer16((C)>>16); spi.transfer16((uint16_t)(C)) // Write two address coordinates #define tft_Write_32C(C,D) spi.transfer16(C); spi.transfer16(D) // Write same value twice #define tft_Write_32D(C) spi.transfer16(C); spi.transfer16(C) //////////////////////////////////////////////////////////////////////////////////////// // Macros to write commands/pixel colour data to other displays //////////////////////////////////////////////////////////////////////////////////////// #else #if defined (RPI_DISPLAY_TYPE) // RPi TFT type always needs 16 bit transfers #define tft_Write_8(C) spi.transfer(C); spi.transfer(C) #define tft_Write_16(C) spi.transfer((uint8_t)((C)>>8));spi.transfer((uint8_t)((C)>>0)) #define tft_Write_16S(C) spi.transfer((uint8_t)((C)>>0));spi.transfer((uint8_t)((C)>>8)) #define tft_Write_32(C) \ tft_Write_16((uint16_t) ((C)>>16)); \ tft_Write_16((uint16_t) ((C)>>0)) #define tft_Write_32C(C,D) \ spi.transfer(0); spi.transfer((C)>>8); \ spi.transfer(0); spi.transfer((C)>>0); \ spi.transfer(0); spi.transfer((D)>>8); \ spi.transfer(0); spi.transfer((D)>>0) #define tft_Write_32D(C) \ spi.transfer(0); spi.transfer((C)>>8); \ spi.transfer(0); spi.transfer((C)>>0); \ spi.transfer(0); spi.transfer((C)>>8); \ spi.transfer(0); spi.transfer((C)>>0) #else #ifdef __AVR__ // AVR processors do not have 16 bit transfer #define tft_Write_8(C) {SPDR=(C); while (!(SPSR&_BV(SPIF)));} #define tft_Write_16(C) tft_Write_8((uint8_t)((C)>>8));tft_Write_8((uint8_t)((C)>>0)) #define tft_Write_16S(C) tft_Write_8((uint8_t)((C)>>0));tft_Write_8((uint8_t)((C)>>8)) #else #define tft_Write_8(C) spi.transfer(C) #define tft_Write_16(C) spi.transfer16(C) #define tft_Write_16S(C) spi.transfer16(((C)>>8) | ((C)<<8)) #endif // AVR #define tft_Write_32(C) \ tft_Write_16((uint16_t) ((C)>>16)); \ tft_Write_16((uint16_t) ((C)>>0)) #define tft_Write_32C(C,D) \ tft_Write_16((uint16_t) (C)); \ tft_Write_16((uint16_t) (D)) #define tft_Write_32D(C) \ tft_Write_16((uint16_t) (C)); \ tft_Write_16((uint16_t) (C)) #endif // RPI_DISPLAY_TYPE #endif #ifndef tft_Write_16N #define tft_Write_16N tft_Write_16 #endif //////////////////////////////////////////////////////////////////////////////////////// // Macros to read from display using SPI or software SPI //////////////////////////////////////////////////////////////////////////////////////// #if defined (TFT_SDA_READ) // Use a bit banged function call for STM32 and bi-directional SDA pin #define TFT_eSPI_ENABLE_8_BIT_READ // Enable tft_Read_8(void); #define SCLK_L digitalWrite(TFT_SCLK, LOW) #define SCLK_H digitalWrite(TFT_SCLK, LOW) #else // Use a SPI read transfer #define tft_Read_8() spi.transfer(0) #endif #endif // Header end