520 lines
24 KiB
C++
520 lines
24 KiB
C++
/*!
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* @file Adafruit_SPITFT.h
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*
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* Part of Adafruit's GFX graphics library. Originally this class was
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* written to handle a range of color TFT displays connected via SPI,
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* but over time this library and some display-specific subclasses have
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* mutated to include some color OLEDs as well as parallel-interfaced
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* displays. The name's been kept for the sake of older code.
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*
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* Adafruit invests time and resources providing this open source code,
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* please support Adafruit and open-source hardware by purchasing
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* products from Adafruit!
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*
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* Written by Limor "ladyada" Fried for Adafruit Industries,
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* with contributions from the open source community.
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*
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* BSD license, all text here must be included in any redistribution.
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*/
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#ifndef _ADAFRUIT_SPITFT_H_
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#define _ADAFRUIT_SPITFT_H_
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#if !defined(__AVR_ATtiny85__) // Not for ATtiny, at all
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#include <SPI.h>
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#include "Adafruit_GFX.h"
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// HARDWARE CONFIG ---------------------------------------------------------
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#if defined(__AVR__)
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typedef uint8_t PORT_t; ///< PORT values are 8-bit
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#define USE_FAST_PINIO ///< Use direct PORT register access
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#elif defined(ARDUINO_STM32_FEATHER) // WICED
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typedef class HardwareSPI SPIClass; ///< SPI is a bit odd on WICED
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typedef uint32_t PORT_t; ///< PORT values are 32-bit
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#elif defined(__arm__)
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#if defined(ARDUINO_ARCH_SAMD)
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// Adafruit M0, M4
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typedef uint32_t PORT_t; ///< PORT values are 32-bit
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#define USE_FAST_PINIO ///< Use direct PORT register access
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#define HAS_PORT_SET_CLR ///< PORTs have set & clear registers
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#elif defined(CORE_TEENSY)
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// PJRC Teensy 4.x
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#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
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typedef uint32_t PORT_t; ///< PORT values are 32-bit
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// PJRC Teensy 3.x
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#else
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typedef uint8_t PORT_t; ///< PORT values are 8-bit
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#endif
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#define USE_FAST_PINIO ///< Use direct PORT register access
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#define HAS_PORT_SET_CLR ///< PORTs have set & clear registers
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#else
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// Arduino Due?
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typedef uint32_t PORT_t; ///< PORT values are 32-bit
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// USE_FAST_PINIO not available here (yet)...Due has a totally different
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// GPIO register set and will require some changes elsewhere (e.g. in
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// constructors especially).
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#endif
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#else // !ARM
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// Probably ESP8266 or ESP32. USE_FAST_PINIO is not available here (yet)
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// but don't worry about it too much...the digitalWrite() implementation
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// on these platforms is reasonably efficient and already RAM-resident,
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// only gotcha then is no parallel connection support for now.
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typedef uint32_t PORT_t; ///< PORT values are 32-bit
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#endif // end !ARM
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typedef volatile PORT_t* PORTreg_t; ///< PORT register type
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#if defined(__AVR__)
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#define DEFAULT_SPI_FREQ 8000000L ///< Hardware SPI default speed
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#else
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#define DEFAULT_SPI_FREQ 16000000L ///< Hardware SPI default speed
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#endif
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#if defined(ADAFRUIT_PYPORTAL) || defined(ADAFRUIT_PYBADGE_M4_EXPRESS) || defined(ADAFRUIT_PYGAMER_M4_EXPRESS)
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#define USE_SPI_DMA ///< Auto DMA if using PyPortal
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#else
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//#define USE_SPI_DMA ///< If set, use DMA if available
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#endif
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// Another "oops" name -- this now also handles parallel DMA.
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// If DMA is enabled, Arduino sketch MUST #include <Adafruit_ZeroDMA.h>
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// Estimated RAM usage:
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// 4 bytes/pixel on display major axis + 8 bytes/pixel on minor axis,
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// e.g. 320x240 pixels = 320 * 4 + 240 * 8 = 3,200 bytes.
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#if !defined(ARDUINO_ARCH_SAMD)
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#undef USE_SPI_DMA ///< DMA currently for SAMD chips only
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#endif
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#if defined(USE_SPI_DMA)
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#pragma message ("GFX DMA IS ENABLED. HIGHLY EXPERIMENTAL.")
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#include <Adafruit_ZeroDMA.h>
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#endif
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// This is kind of a kludge. Needed a way to disambiguate the software SPI
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// and parallel constructors via their argument lists. Originally tried a
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// bool as the first argument to the parallel constructor (specifying 8-bit
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// vs 16-bit interface) but the compiler regards this as equivalent to an
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// integer and thus still ambiguous. SO...the parallel constructor requires
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// an enumerated type as the first argument: tft8 (for 8-bit parallel) or
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// tft16 (for 16-bit)...even though 16-bit isn't fully implemented or tested
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// and might never be, still needed that disambiguation from soft SPI.
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enum tftBusWidth { tft8bitbus, tft16bitbus }; ///< For first arg to parallel constructor
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// CLASS DEFINITION --------------------------------------------------------
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/*!
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@brief Adafruit_SPITFT is an intermediary class between Adafruit_GFX
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and various hardware-specific subclasses for different displays.
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It handles certain operations that are common to a range of
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displays (address window, area fills, etc.). Originally these were
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all color TFT displays interfaced via SPI, but it's since expanded
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to include color OLEDs and parallel-interfaced TFTs. THE NAME HAS
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BEEN KEPT TO AVOID BREAKING A LOT OF SUBCLASSES AND EXAMPLE CODE.
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Many of the class member functions similarly live on with names
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that don't necessarily accurately describe what they're doing,
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again to avoid breaking a lot of other code. If in doubt, read
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the comments.
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*/
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class Adafruit_SPITFT : public Adafruit_GFX {
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public:
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// CONSTRUCTORS --------------------------------------------------------
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// Software SPI constructor: expects width & height (at default rotation
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// setting 0), 4 signal pins (cs, dc, mosi, sclk), 2 optional pins
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// (reset, miso). cs argument is required but can be -1 if unused --
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// rather than moving it to the optional arguments, it was done this way
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// to avoid breaking existing code (-1 option was a later addition).
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Adafruit_SPITFT(uint16_t w, uint16_t h,
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int8_t cs, int8_t dc, int8_t mosi, int8_t sck,
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int8_t rst = -1, int8_t miso = -1);
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// Hardware SPI constructor using the default SPI port: expects width &
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// height (at default rotation setting 0), 2 signal pins (cs, dc),
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// optional reset pin. cs is required but can be -1 if unused -- rather
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// than moving it to the optional arguments, it was done this way to
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// avoid breaking existing code (-1 option was a later addition).
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Adafruit_SPITFT(uint16_t w, uint16_t h,
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int8_t cs, int8_t dc, int8_t rst = -1);
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#if !defined(ESP8266) // See notes in .cpp
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// Hardware SPI constructor using an arbitrary SPI peripheral: expects
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// width & height (rotation 0), SPIClass pointer, 2 signal pins (cs, dc)
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// and optional reset pin. cs is required but can be -1 if unused.
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Adafruit_SPITFT(uint16_t w, uint16_t h, SPIClass *spiClass,
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int8_t cs, int8_t dc, int8_t rst = -1);
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#endif // end !ESP8266
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// Parallel constructor: expects width & height (rotation 0), flag
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// indicating whether 16-bit (true) or 8-bit (false) interface, 3 signal
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// pins (d0, wr, dc), 3 optional pins (cs, rst, rd). 16-bit parallel
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// isn't even fully implemented but the 'wide' flag was added as a
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// required argument to avoid ambiguity with other constructors.
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Adafruit_SPITFT(uint16_t w, uint16_t h, tftBusWidth busWidth,
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int8_t d0, int8_t wr, int8_t dc,
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int8_t cs = -1, int8_t rst = -1, int8_t rd = -1);
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// CLASS MEMBER FUNCTIONS ----------------------------------------------
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// These first two functions MUST be declared by subclasses:
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/*!
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@brief Display-specific initialization function.
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@param freq SPI frequency, in hz (or 0 for default or unused).
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*/
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virtual void begin(uint32_t freq) = 0;
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/*!
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@brief Set up the specific display hardware's "address window"
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for subsequent pixel-pushing operations.
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@param x Leftmost pixel of area to be drawn (MUST be within
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display bounds at current rotation setting).
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@param y Topmost pixel of area to be drawn (MUST be within
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display bounds at current rotation setting).
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@param w Width of area to be drawn, in pixels (MUST be >0 and,
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added to x, within display bounds at current rotation).
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@param h Height of area to be drawn, in pixels (MUST be >0 and,
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added to x, within display bounds at current rotation).
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*/
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virtual void setAddrWindow(
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uint16_t x, uint16_t y, uint16_t w, uint16_t h) = 0;
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// Remaining functions do not need to be declared in subclasses
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// unless they wish to provide hardware-specific optimizations.
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// Brief comments here...documented more thoroughly in .cpp file.
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// Subclass' begin() function invokes this to initialize hardware.
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// freq=0 to use default SPI speed. spiMode must be one of the SPI_MODEn
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// values defined in SPI.h, which are NOT the same as 0 for SPI_MODE0,
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// 1 for SPI_MODE1, etc...use ONLY the SPI_MODEn defines! Only!
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// Name is outdated (interface may be parallel) but for compatibility:
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void initSPI(uint32_t freq = 0, uint8_t spiMode = SPI_MODE0);
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// Chip select and/or hardware SPI transaction start as needed:
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void startWrite(void);
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// Chip deselect and/or hardware SPI transaction end as needed:
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void endWrite(void);
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void sendCommand(uint8_t commandByte, uint8_t *dataBytes = NULL, uint8_t numDataBytes = 0);
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void sendCommand(uint8_t commandByte, const uint8_t *dataBytes, uint8_t numDataBytes);
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uint8_t readcommand8(uint8_t commandByte, uint8_t index = 0);
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// These functions require a chip-select and/or SPI transaction
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// around them. Higher-level graphics primitives might start a
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// single transaction and then make multiple calls to these functions
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// (e.g. circle or text rendering might make repeated lines or rects)
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// before ending the transaction. It's more efficient than starting a
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// transaction every time.
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void writePixel(int16_t x, int16_t y, uint16_t color);
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void writePixels(uint16_t *colors, uint32_t len,
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bool block=true, bool bigEndian=false);
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void writeColor(uint16_t color, uint32_t len);
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void writeFillRect(int16_t x, int16_t y, int16_t w, int16_t h,
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uint16_t color);
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void writeFastHLine(int16_t x, int16_t y, int16_t w,
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uint16_t color);
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void writeFastVLine(int16_t x, int16_t y, int16_t h,
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uint16_t color);
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// This is a new function, similar to writeFillRect() except that
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// all arguments MUST be onscreen, sorted and clipped. If higher-level
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// primitives can handle their own sorting/clipping, it avoids repeating
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// such operations in the low-level code, making it potentially faster.
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// CALLING THIS WITH UNCLIPPED OR NEGATIVE VALUES COULD BE DISASTROUS.
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inline void writeFillRectPreclipped(int16_t x, int16_t y,
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int16_t w, int16_t h, uint16_t color);
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// Another new function, companion to the new non-blocking
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// writePixels() variant.
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void dmaWait(void);
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// These functions are similar to the 'write' functions above, but with
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// a chip-select and/or SPI transaction built-in. They're typically used
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// solo -- that is, as graphics primitives in themselves, not invoked by
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// higher-level primitives (which should use the functions above).
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void drawPixel(int16_t x, int16_t y, uint16_t color);
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void fillRect(int16_t x, int16_t y, int16_t w, int16_t h,
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uint16_t color);
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void drawFastHLine(int16_t x, int16_t y, int16_t w,
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uint16_t color);
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void drawFastVLine(int16_t x, int16_t y, int16_t h,
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uint16_t color);
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// A single-pixel push encapsulated in a transaction. I don't think
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// this is used anymore (BMP demos might've used it?) but is provided
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// for backward compatibility, consider it deprecated:
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void pushColor(uint16_t color);
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using Adafruit_GFX::drawRGBBitmap; // Check base class first
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void drawRGBBitmap(int16_t x, int16_t y,
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uint16_t *pcolors, int16_t w, int16_t h);
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void invertDisplay(bool i);
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uint16_t color565(uint8_t r, uint8_t g, uint8_t b);
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// Despite parallel additions, function names kept for compatibility:
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void spiWrite(uint8_t b); // Write single byte as DATA
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void writeCommand(uint8_t cmd); // Write single byte as COMMAND
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uint8_t spiRead(void); // Read single byte of data
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// Most of these low-level functions were formerly macros in
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// Adafruit_SPITFT_Macros.h. Some have been made into inline functions
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// to avoid macro mishaps. Despite the addition of code for a parallel
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// display interface, the names have been kept for backward
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// compatibility (some subclasses may be invoking these):
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void SPI_WRITE16(uint16_t w); // Not inline
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void SPI_WRITE32(uint32_t l); // Not inline
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// Old code had both a spiWrite16() function and SPI_WRITE16 macro
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// in addition to the SPI_WRITE32 macro. The latter two have been
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// made into functions here, and spiWrite16() removed (use SPI_WRITE16()
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// instead). It looks like most subclasses had gotten comfortable with
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// SPI_WRITE16 and SPI_WRITE32 anyway so those names were kept rather
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// than the less-obnoxious camelcase variants, oh well.
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// Placing these functions entirely in the class definition inlines
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// them implicitly them while allowing their use in other code:
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/*!
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@brief Set the chip-select line HIGH. Does NOT check whether CS pin
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is set (>=0), that should be handled in calling function.
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Despite function name, this is used even if the display
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connection is parallel.
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*/
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void SPI_CS_HIGH(void) {
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#if defined(USE_FAST_PINIO)
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#if defined(HAS_PORT_SET_CLR)
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#if defined(KINETISK)
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*csPortSet = 1;
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#else // !KINETISK
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*csPortSet = csPinMask;
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#endif // end !KINETISK
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#else // !HAS_PORT_SET_CLR
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*csPort |= csPinMaskSet;
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#endif // end !HAS_PORT_SET_CLR
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#else // !USE_FAST_PINIO
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digitalWrite(_cs, HIGH);
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#endif // end !USE_FAST_PINIO
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}
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/*!
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@brief Set the chip-select line LOW. Does NOT check whether CS pin
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is set (>=0), that should be handled in calling function.
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Despite function name, this is used even if the display
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connection is parallel.
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*/
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void SPI_CS_LOW(void) {
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#if defined(USE_FAST_PINIO)
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#if defined(HAS_PORT_SET_CLR)
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#if defined(KINETISK)
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*csPortClr = 1;
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#else // !KINETISK
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*csPortClr = csPinMask;
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#endif // end !KINETISK
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#else // !HAS_PORT_SET_CLR
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*csPort &= csPinMaskClr;
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#endif // end !HAS_PORT_SET_CLR
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#else // !USE_FAST_PINIO
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digitalWrite(_cs, LOW);
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#endif // end !USE_FAST_PINIO
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}
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/*!
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@brief Set the data/command line HIGH (data mode).
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*/
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void SPI_DC_HIGH(void) {
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#if defined(USE_FAST_PINIO)
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#if defined(HAS_PORT_SET_CLR)
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#if defined(KINETISK)
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*dcPortSet = 1;
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#else // !KINETISK
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*dcPortSet = dcPinMask;
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#endif // end !KINETISK
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#else // !HAS_PORT_SET_CLR
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*dcPort |= dcPinMaskSet;
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#endif // end !HAS_PORT_SET_CLR
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#else // !USE_FAST_PINIO
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digitalWrite(_dc, HIGH);
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#endif // end !USE_FAST_PINIO
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}
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/*!
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@brief Set the data/command line LOW (command mode).
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*/
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void SPI_DC_LOW(void) {
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#if defined(USE_FAST_PINIO)
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#if defined(HAS_PORT_SET_CLR)
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#if defined(KINETISK)
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*dcPortClr = 1;
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#else // !KINETISK
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*dcPortClr = dcPinMask;
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#endif // end !KINETISK
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#else // !HAS_PORT_SET_CLR
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*dcPort &= dcPinMaskClr;
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#endif // end !HAS_PORT_SET_CLR
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#else // !USE_FAST_PINIO
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digitalWrite(_dc, LOW);
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#endif // end !USE_FAST_PINIO
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}
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protected:
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// A few more low-level member functions -- some may have previously
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// been macros. Shouldn't have a need to access these externally, so
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// they've been moved to the protected section. Additionally, they're
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// declared inline here and the code is in the .cpp file, since outside
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// code doesn't need to see these.
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inline void SPI_MOSI_HIGH(void);
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inline void SPI_MOSI_LOW(void);
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inline void SPI_SCK_HIGH(void);
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inline void SPI_SCK_LOW(void);
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inline bool SPI_MISO_READ(void);
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inline void SPI_BEGIN_TRANSACTION(void);
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inline void SPI_END_TRANSACTION(void);
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inline void TFT_WR_STROBE(void); // Parallel interface write strobe
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inline void TFT_RD_HIGH(void); // Parallel interface read high
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inline void TFT_RD_LOW(void); // Parallel interface read low
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// CLASS INSTANCE VARIABLES --------------------------------------------
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// Here be dragons! There's a big union of three structures here --
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// one each for hardware SPI, software (bitbang) SPI, and parallel
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// interfaces. This is to save some memory, since a display's connection
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// will be only one of these. The order of some things is a little weird
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// in an attempt to get values to align and pack better in RAM.
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#if defined(USE_FAST_PINIO)
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#if defined(HAS_PORT_SET_CLR)
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PORTreg_t csPortSet; ///< PORT register for chip select SET
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PORTreg_t csPortClr; ///< PORT register for chip select CLEAR
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PORTreg_t dcPortSet; ///< PORT register for data/command SET
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PORTreg_t dcPortClr; ///< PORT register for data/command CLEAR
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#else // !HAS_PORT_SET_CLR
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PORTreg_t csPort; ///< PORT register for chip select
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PORTreg_t dcPort; ///< PORT register for data/command
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#endif // end HAS_PORT_SET_CLR
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#endif // end USE_FAST_PINIO
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#if defined(__cplusplus) && (__cplusplus >= 201100)
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union {
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#endif
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struct { // Values specific to HARDWARE SPI:
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SPIClass *_spi; ///< SPI class pointer
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#if defined(SPI_HAS_TRANSACTION)
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SPISettings settings; ///< SPI transaction settings
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#else
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uint32_t _freq; ///< SPI bitrate (if no SPI transactions)
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#endif
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uint32_t _mode; ///< SPI data mode (transactions or no)
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} hwspi; ///< Hardware SPI values
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struct { // Values specific to SOFTWARE SPI:
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#if defined(USE_FAST_PINIO)
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PORTreg_t misoPort; ///< PORT (PIN) register for MISO
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#if defined(HAS_PORT_SET_CLR)
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PORTreg_t mosiPortSet; ///< PORT register for MOSI SET
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PORTreg_t mosiPortClr; ///< PORT register for MOSI CLEAR
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PORTreg_t sckPortSet; ///< PORT register for SCK SET
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PORTreg_t sckPortClr; ///< PORT register for SCK CLEAR
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#if !defined(KINETISK)
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PORT_t mosiPinMask; ///< Bitmask for MOSI
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PORT_t sckPinMask; ///< Bitmask for SCK
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#endif // end !KINETISK
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#else // !HAS_PORT_SET_CLR
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PORTreg_t mosiPort; ///< PORT register for MOSI
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PORTreg_t sckPort; ///< PORT register for SCK
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PORT_t mosiPinMaskSet; ///< Bitmask for MOSI SET (OR)
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PORT_t mosiPinMaskClr; ///< Bitmask for MOSI CLEAR (AND)
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PORT_t sckPinMaskSet; ///< Bitmask for SCK SET (OR bitmask)
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PORT_t sckPinMaskClr; ///< Bitmask for SCK CLEAR (AND)
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#endif // end HAS_PORT_SET_CLR
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#if !defined(KINETISK)
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PORT_t misoPinMask; ///< Bitmask for MISO
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#endif // end !KINETISK
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#endif // end USE_FAST_PINIO
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int8_t _mosi; ///< MOSI pin #
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int8_t _miso; ///< MISO pin #
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int8_t _sck; ///< SCK pin #
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} swspi; ///< Software SPI values
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struct { // Values specific to 8-bit parallel:
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#if defined(USE_FAST_PINIO)
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#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
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volatile uint32_t *writePort; ///< PORT register for DATA WRITE
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volatile uint32_t *readPort; ///< PORT (PIN) register for DATA READ
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#else
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volatile uint8_t *writePort; ///< PORT register for DATA WRITE
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volatile uint8_t *readPort; ///< PORT (PIN) register for DATA READ
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#endif
|
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#if defined(HAS_PORT_SET_CLR)
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// Port direction register pointers are always 8-bit regardless of
|
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// PORTreg_t -- even if 32-bit port, we modify a byte-aligned 8 bits.
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#if defined(__IMXRT1052__) || defined(__IMXRT1062__) // Teensy 4.x
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volatile uint32_t *dirSet; ///< PORT byte data direction SET
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volatile uint32_t *dirClr; ///< PORT byte data direction CLEAR
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#else
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volatile uint8_t *dirSet; ///< PORT byte data direction SET
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|
volatile uint8_t *dirClr; ///< PORT byte data direction CLEAR
|
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#endif
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PORTreg_t wrPortSet; ///< PORT register for write strobe SET
|
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PORTreg_t wrPortClr; ///< PORT register for write strobe CLEAR
|
|
PORTreg_t rdPortSet; ///< PORT register for read strobe SET
|
|
PORTreg_t rdPortClr; ///< PORT register for read strobe CLEAR
|
|
#if !defined(KINETISK)
|
|
PORT_t wrPinMask; ///< Bitmask for write strobe
|
|
#endif // end !KINETISK
|
|
PORT_t rdPinMask; ///< Bitmask for read strobe
|
|
#else // !HAS_PORT_SET_CLR
|
|
// Port direction register pointer is always 8-bit regardless of
|
|
// PORTreg_t -- even if 32-bit port, we modify a byte-aligned 8 bits.
|
|
volatile uint8_t *portDir; ///< PORT direction register
|
|
PORTreg_t wrPort; ///< PORT register for write strobe
|
|
PORTreg_t rdPort; ///< PORT register for read strobe
|
|
PORT_t wrPinMaskSet; ///< Bitmask for write strobe SET (OR)
|
|
PORT_t wrPinMaskClr; ///< Bitmask for write strobe CLEAR (AND)
|
|
PORT_t rdPinMaskSet; ///< Bitmask for read strobe SET (OR)
|
|
PORT_t rdPinMaskClr; ///< Bitmask for read strobe CLEAR (AND)
|
|
#endif // end HAS_PORT_SET_CLR
|
|
#endif // end USE_FAST_PINIO
|
|
int8_t _d0; ///< Data pin 0 #
|
|
int8_t _wr; ///< Write strobe pin #
|
|
int8_t _rd; ///< Read strobe pin # (or -1)
|
|
bool wide = 0; ///< If true, is 16-bit interface
|
|
} tft8; ///< Parallel interface settings
|
|
#if defined(__cplusplus) && (__cplusplus >= 201100)
|
|
}; ///< Only one interface is active
|
|
#endif
|
|
#if defined(USE_SPI_DMA) // Used by hardware SPI and tft8
|
|
Adafruit_ZeroDMA dma; ///< DMA instance
|
|
DmacDescriptor *dptr = NULL; ///< 1st descriptor
|
|
DmacDescriptor *descriptor = NULL; ///< Allocated descriptor list
|
|
uint16_t *pixelBuf[2]; ///< Working buffers
|
|
uint16_t maxFillLen; ///< Max pixels per DMA xfer
|
|
uint16_t lastFillColor = 0; ///< Last color used w/fill
|
|
uint32_t lastFillLen = 0; ///< # of pixels w/last fill
|
|
uint8_t onePixelBuf; ///< For hi==lo fill
|
|
#endif
|
|
#if defined(USE_FAST_PINIO)
|
|
#if defined(HAS_PORT_SET_CLR)
|
|
#if !defined(KINETISK)
|
|
PORT_t csPinMask; ///< Bitmask for chip select
|
|
PORT_t dcPinMask; ///< Bitmask for data/command
|
|
#endif // end !KINETISK
|
|
#else // !HAS_PORT_SET_CLR
|
|
PORT_t csPinMaskSet; ///< Bitmask for chip select SET (OR)
|
|
PORT_t csPinMaskClr; ///< Bitmask for chip select CLEAR (AND)
|
|
PORT_t dcPinMaskSet; ///< Bitmask for data/command SET (OR)
|
|
PORT_t dcPinMaskClr; ///< Bitmask for data/command CLEAR (AND)
|
|
#endif // end HAS_PORT_SET_CLR
|
|
#endif // end USE_FAST_PINIO
|
|
uint8_t connection; ///< TFT_HARD_SPI, TFT_SOFT_SPI, etc.
|
|
int8_t _rst; ///< Reset pin # (or -1)
|
|
int8_t _cs; ///< Chip select pin # (or -1)
|
|
int8_t _dc; ///< Data/command pin #
|
|
|
|
int16_t _xstart = 0; ///< Internal framebuffer X offset
|
|
int16_t _ystart = 0; ///< Internal framebuffer Y offset
|
|
uint8_t invertOnCommand = 0; ///< Command to enable invert mode
|
|
uint8_t invertOffCommand = 0; ///< Command to disable invert mode
|
|
|
|
uint32_t _freq = 0; ///< Dummy var to keep subclasses happy
|
|
};
|
|
|
|
#endif // end __AVR_ATtiny85__
|
|
#endif // end _ADAFRUIT_SPITFT_H_
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