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Marcus Priesch
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/***************************************************
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This is our library for generic SPI TFT Displays with
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address windows and 16 bit color (e.g. ILI9341, HX8357D, ST7735...)
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Check out the links above for our tutorials and wiring diagrams
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These displays use SPI to communicate, 4 or 5 pins are required to
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interface (RST is optional)
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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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Written by Limor Fried/Ladyada for Adafruit Industries.
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MIT license, all text above must be included in any redistribution
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****************************************************/
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#include "Adafruit_SPITFT.h"
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#ifndef ARDUINO_STM32_FEATHER
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#include "pins_arduino.h"
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#ifndef RASPI
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#include "wiring_private.h"
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#endif
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#endif
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#include <limits.h>
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#include "Adafruit_SPITFT_Macros.h"
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// Pass 8-bit (each) R,G,B, get back 16-bit packed color
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uint16_t Adafruit_SPITFT::color565(uint8_t r, uint8_t g, uint8_t b) {
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return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | ((b & 0xF8) >> 3);
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}
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Adafruit_SPITFT::Adafruit_SPITFT(uint16_t w, uint16_t h,
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int8_t cs, int8_t dc, int8_t mosi,
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int8_t sclk, int8_t rst, int8_t miso)
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: Adafruit_GFX(w, h) {
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_cs = cs;
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_dc = dc;
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_rst = rst;
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_sclk = sclk;
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_mosi = mosi;
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_miso = miso;
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_freq = 0;
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#ifdef USE_FAST_PINIO
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csport = portOutputRegister(digitalPinToPort(_cs));
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cspinmask = digitalPinToBitMask(_cs);
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dcport = portOutputRegister(digitalPinToPort(_dc));
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dcpinmask = digitalPinToBitMask(_dc);
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clkport = portOutputRegister(digitalPinToPort(_sclk));
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clkpinmask = digitalPinToBitMask(_sclk);
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mosiport = portOutputRegister(digitalPinToPort(_mosi));
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mosipinmask = digitalPinToBitMask(_mosi);
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if(miso >= 0){
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misoport = portInputRegister(digitalPinToPort(_miso));
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misopinmask = digitalPinToBitMask(_miso);
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} else {
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misoport = 0;
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misopinmask = 0;
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}
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#endif
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}
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Adafruit_SPITFT::Adafruit_SPITFT(uint16_t w, uint16_t h,
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int8_t cs, int8_t dc, int8_t rst)
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: Adafruit_GFX(w, h) {
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_cs = cs;
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_dc = dc;
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_rst = rst;
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_sclk = -1;
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_mosi = -1;
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_miso = -1;
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_freq = 0;
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#ifdef USE_FAST_PINIO
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csport = portOutputRegister(digitalPinToPort(_cs));
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cspinmask = digitalPinToBitMask(_cs);
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dcport = portOutputRegister(digitalPinToPort(_dc));
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dcpinmask = digitalPinToBitMask(_dc);
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clkport = 0;
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clkpinmask = 0;
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mosiport = 0;
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mosipinmask = 0;
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misoport = 0;
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misopinmask = 0;
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#endif
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}
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void Adafruit_SPITFT::initSPI(uint32_t freq)
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{
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_freq = freq;
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// Control Pins
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pinMode(_dc, OUTPUT);
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digitalWrite(_dc, LOW);
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pinMode(_cs, OUTPUT);
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digitalWrite(_cs, HIGH);
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// Software SPI
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if(_sclk >= 0){
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pinMode(_mosi, OUTPUT);
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digitalWrite(_mosi, LOW);
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pinMode(_sclk, OUTPUT);
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digitalWrite(_sclk, HIGH);
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if(_miso >= 0){
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pinMode(_miso, INPUT);
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}
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}
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// Hardware SPI
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SPI_BEGIN();
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// toggle RST low to reset
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if (_rst >= 0) {
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pinMode(_rst, OUTPUT);
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digitalWrite(_rst, HIGH);
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delay(100);
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digitalWrite(_rst, LOW);
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delay(100);
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digitalWrite(_rst, HIGH);
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delay(200);
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}
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}
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uint8_t Adafruit_SPITFT::spiRead() {
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if(_sclk < 0){
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return HSPI_READ();
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}
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if(_miso < 0){
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return 0;
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}
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uint8_t r = 0;
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for (uint8_t i=0; i<8; i++) {
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SSPI_SCK_LOW();
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SSPI_SCK_HIGH();
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r <<= 1;
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if (SSPI_MISO_READ()){
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r |= 0x1;
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}
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}
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return r;
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}
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void Adafruit_SPITFT::spiWrite(uint8_t b) {
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if(_sclk < 0){
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HSPI_WRITE(b);
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return;
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}
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for(uint8_t bit = 0x80; bit; bit >>= 1){
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if((b) & bit){
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SSPI_MOSI_HIGH();
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} else {
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SSPI_MOSI_LOW();
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}
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SSPI_SCK_LOW();
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SSPI_SCK_HIGH();
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}
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}
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/*
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* Transaction API
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* */
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void Adafruit_SPITFT::startWrite(void){
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SPI_BEGIN_TRANSACTION();
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SPI_CS_LOW();
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}
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void Adafruit_SPITFT::endWrite(void){
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SPI_CS_HIGH();
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SPI_END_TRANSACTION();
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}
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void Adafruit_SPITFT::writeCommand(uint8_t cmd){
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SPI_DC_LOW();
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spiWrite(cmd);
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SPI_DC_HIGH();
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}
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void Adafruit_SPITFT::pushColor(uint16_t color) {
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startWrite();
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SPI_WRITE16(color);
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endWrite();
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}
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void Adafruit_SPITFT::writePixel(uint16_t color){
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SPI_WRITE16(color);
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}
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void Adafruit_SPITFT::writePixels(uint16_t * colors, uint32_t len){
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SPI_WRITE_PIXELS((uint8_t*)colors , len * 2);
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}
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void Adafruit_SPITFT::writeColor(uint16_t color, uint32_t len){
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#ifdef SPI_HAS_WRITE_PIXELS
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if(_sclk >= 0){
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for (uint32_t t=0; t<len; t++){
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writePixel(color);
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}
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return;
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}
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static uint16_t temp[SPI_MAX_PIXELS_AT_ONCE];
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size_t blen = (len > SPI_MAX_PIXELS_AT_ONCE)?SPI_MAX_PIXELS_AT_ONCE:len;
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uint16_t tlen = 0;
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for (uint32_t t=0; t<blen; t++){
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temp[t] = color;
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}
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while(len){
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tlen = (len>blen)?blen:len;
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writePixels(temp, tlen);
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len -= tlen;
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}
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#else
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uint8_t hi = color >> 8, lo = color;
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if(_sclk < 0){ //AVR Optimization
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for (uint32_t t=len; t; t--){
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HSPI_WRITE(hi);
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HSPI_WRITE(lo);
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}
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return;
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}
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for (uint32_t t=len; t; t--){
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spiWrite(hi);
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spiWrite(lo);
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}
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#endif
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}
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void Adafruit_SPITFT::writePixel(int16_t x, int16_t y, uint16_t color) {
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if((x < 0) ||(x >= _width) || (y < 0) || (y >= _height)) return;
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setAddrWindow(x,y,1,1);
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writePixel(color);
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}
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void Adafruit_SPITFT::writeFillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color){
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if((x >= _width) || (y >= _height)) return;
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int16_t x2 = x + w - 1, y2 = y + h - 1;
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if((x2 < 0) || (y2 < 0)) return;
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// Clip left/top
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if(x < 0) {
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x = 0;
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w = x2 + 1;
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}
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if(y < 0) {
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y = 0;
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h = y2 + 1;
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}
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// Clip right/bottom
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if(x2 >= _width) w = _width - x;
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if(y2 >= _height) h = _height - y;
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int32_t len = (int32_t)w * h;
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setAddrWindow(x, y, w, h);
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writeColor(color, len);
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}
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void Adafruit_SPITFT::writeFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color){
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writeFillRect(x, y, 1, h, color);
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}
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void Adafruit_SPITFT::writeFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color){
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writeFillRect(x, y, w, 1, color);
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}
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void Adafruit_SPITFT::drawPixel(int16_t x, int16_t y, uint16_t color){
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startWrite();
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writePixel(x, y, color);
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endWrite();
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}
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void Adafruit_SPITFT::drawFastVLine(int16_t x, int16_t y,
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int16_t h, uint16_t color) {
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startWrite();
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writeFastVLine(x, y, h, color);
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endWrite();
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}
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void Adafruit_SPITFT::drawFastHLine(int16_t x, int16_t y,
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int16_t w, uint16_t color) {
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startWrite();
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writeFastHLine(x, y, w, color);
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endWrite();
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}
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void Adafruit_SPITFT::fillRect(int16_t x, int16_t y, int16_t w, int16_t h,
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uint16_t color) {
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startWrite();
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writeFillRect(x,y,w,h,color);
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endWrite();
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}
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// Adapted from https://github.com/PaulStoffregen/ILI9341_t3
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// by Marc MERLIN. See examples/pictureEmbed to use this.
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// 5/6/2017: function name and arguments have changed for compatibility
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// with current GFX library and to avoid naming problems in prior
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// implementation. Formerly drawBitmap() with arguments in different order.
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void Adafruit_SPITFT::drawRGBBitmap(int16_t x, int16_t y,
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uint16_t *pcolors, int16_t w, int16_t h) {
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int16_t x2, y2; // Lower-right coord
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if(( x >= _width ) || // Off-edge right
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( y >= _height) || // " top
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((x2 = (x+w-1)) < 0 ) || // " left
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((y2 = (y+h-1)) < 0) ) return; // " bottom
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int16_t bx1=0, by1=0, // Clipped top-left within bitmap
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saveW=w; // Save original bitmap width value
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if(x < 0) { // Clip left
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w += x;
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bx1 = -x;
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x = 0;
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}
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if(y < 0) { // Clip top
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h += y;
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by1 = -y;
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y = 0;
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}
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if(x2 >= _width ) w = _width - x; // Clip right
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if(y2 >= _height) h = _height - y; // Clip bottom
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pcolors += by1 * saveW + bx1; // Offset bitmap ptr to clipped top-left
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startWrite();
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setAddrWindow(x, y, w, h); // Clipped area
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while(h--) { // For each (clipped) scanline...
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writePixels(pcolors, w); // Push one (clipped) row
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pcolors += saveW; // Advance pointer by one full (unclipped) line
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}
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endWrite();
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}
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