308 lines
8.3 KiB
C++
308 lines
8.3 KiB
C++
#ifndef LCD_SSD1306
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#define LCD_SSD1306
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//#include "../../io/SoftSPI.h"
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/**
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* https://www.displayfuture.com/Display/datasheet/controller/ST7735.pdf
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* https://www.aliexpress.com/item/1-8-inch-TFT-color-screen-module-ST7735-SPI-at-least-4IO-support-C51-STM32-with/32809505663.html?spm=2114.search0302.3.266.14d83b8cQXOxfz&ws_ab_test=searchweb0_0,searchweb201602_0_450_452_532_533_534_10618_535_317_318_319_10059_10696_10084_100031_10083_10547_10304_10546_10843_10887_320_10307_10548_204_448_10065_449_10068_10320_10103_10884_10820,searchweb201603_0,ppcSwitch_0&algo_pvid=7cf0bb24-ac60-4e97-9878-8716f61a79f3&algo_expid=7cf0bb24-ac60-4e97-9878-8716f61a79f3-33
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* https://sites.google.com/site/arduinomega2560projects/microchip-pic/level-3/st7735-1-8-tft (!!!!)
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*
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* display is SPI
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* CLK = clock
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* SDA = mosi
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* RS = data/command
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* RST = reset
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* CS = chip-select
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*/
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template <typename SPI, int PIN_CS, int PIN_DATA_COMMAND> class ST7735 {
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private:
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static constexpr const char* NAME = "ST7735";
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SPI& spi;
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public:
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/** ctor */
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ST7735(SPI& spi) : spi(spi) {
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MyGPIO::setOutput(PIN_DATA_COMMAND);
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MyGPIO::setOutput(PIN_CS);
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init();
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}
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#define ST7735_NOP 0x00
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#define ST7735_SWRESET 0x01
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#define ST7735_RDDID 0x04
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#define ST7735_RDDST 0x09
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#define ST7735_SLPIN 0x10
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#define ST7735_SLPOUT 0x11
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#define ST7735_PTLON 0x12
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#define ST7735_NORON 0x13
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#define ST7735_INVOFF 0x20
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#define ST7735_INVON 0x21
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#define ST7735_DISPOFF 0x28
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#define ST7735_DISPON 0x29
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#define ST7735_CASET 0x2A
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#define ST7735_RASET 0x2B
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#define ST7735_RAMWR 0x2C
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#define ST7735_RAMRD 0x2E
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#define ST7735_PTLAR 0x30
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#define ST7735_COLMOD 0x3A
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#define ST7735_MADCTL 0x36
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#define ST7735_FRMCTR1 0xB1
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#define ST7735_FRMCTR2 0xB2
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#define ST7735_FRMCTR3 0xB3
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#define ST7735_INVCTR 0xB4
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#define ST7735_DISSET5 0xB6
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#define ST7735_PWCTR1 0xC0
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#define ST7735_PWCTR2 0xC1
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#define ST7735_PWCTR3 0xC2
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#define ST7735_PWCTR4 0xC3
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#define ST7735_PWCTR5 0xC4
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#define ST7735_VMCTR1 0xC5
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#define ST7735_RDID1 0xDA
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#define ST7735_RDID2 0xDB
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#define ST7735_RDID3 0xDC
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#define ST7735_RDID4 0xDD
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#define ST7735_PWCTR6 0xFC
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#define ST7735_GMCTRP1 0xE0
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#define ST7735_GMCTRN1 0xE1
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private:
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static constexpr const int V = 128;
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static constexpr const int H = 160;
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inline void waitLong() {
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//vTaskDelay(200 / portTICK_PERIOD_MS);
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for (int i = 0; i < 0x1FFFFF; ++i) {asm("nop");} // vTaskDelay seems not to block? maybe when display is allocated outside of a function?
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}
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inline void waitShort() {
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//vTaskDelay(20 / portTICK_PERIOD_MS);
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for (int i = 0; i < 0xFFFF; ++i) {asm("nop");}
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}
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void init() {
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debugMod(NAME, "init()");
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select();
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sendCommand(ST7735_SWRESET); // 1: Software reset, 0 args
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deselect();
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waitLong();
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select();
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sendCommand(ST7735_SLPOUT); // 2: Out of sleep mode, 0 args
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deselect();
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waitLong();
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select();
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sendCommand(ST7735_FRMCTR1); // 3: Frame rate ctrl - normal mode) 3 args: 0xb1
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sendData(0x01); sendData(0x2C); sendData(0x2D); // Rate = fosc/(1x2+40) * (LINE+2C+2D)
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waitShort();
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sendCommand(ST7735_FRMCTR2); // 4: Frame rate control - idle mode) 3 args: 0xb2
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sendData(0x01); sendData(0x2C); sendData(0x2D); // Rate = fosc/(1x2+40) * (LINE+2C+2D)
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waitShort();
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sendCommand(ST7735_FRMCTR3); // 5: Frame rate ctrl - partial mode) 6 args: 0xb3
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sendData(0x01); sendData(0x2C); sendData(0x2D); // Dot inversion mode
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sendData(0x01); sendData(0x2C); sendData(0x2D); // Line inversion mode
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waitShort();
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sendCommand(ST7735_INVCTR); // 6: Display inversion ctrl) 1 arg) no delay: 0xb4
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sendData(0x07); // No inversion
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sendCommand(ST7735_PWCTR1); // 7: Power control) 3 args) no delay: 0xc0
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sendData(0xA2);
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sendData(0x02); // -4.6V
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sendData(0x84); // AUTO mode
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sendCommand(ST7735_PWCTR2); // 8: Power control) 1 arg) no delay: 0xc1
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sendData(0xC5); // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD
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sendCommand(ST7735_PWCTR3); // 9: Power control) 2 args) no delay: 0xc2
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sendData(0x0A); // Opamp current small
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sendData(0x00); // Boost frequency
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sendCommand(ST7735_PWCTR4); // 10: Power control) 2 args) no delay:
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sendData(0x8A); // BCLK/2) Opamp current small & Medium low
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sendData(0x2A);
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sendCommand(ST7735_PWCTR5); // 11: Power control) 2 args) no delay:
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sendData(0x8A); sendData(0xEE);
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sendCommand(ST7735_VMCTR1); // 12: Power control) 1 arg) no delay:
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sendData(0x0E);
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sendCommand(ST7735_INVOFF); // 13: Don't invert display) no args) no delay 0x20
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sendCommand(ST7735_MADCTL); // 14: Memory access control (directions)) 1 arg:
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sendData(0xC8); // row addr/col addr); bottom to top refresh
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waitShort();
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sendCommand(ST7735_COLMOD); // 15: set color mode); 1 arg); no delay:
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sendData(0x05); // 16-bit color
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deselect();
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// required??? adjusts colors or something???
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if (1 == 1) {
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select();
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sendCommand(ST7735_GMCTRP1); // 1: Magical unicorn dust, 16 args, no delay:
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sendData(0x02); sendData(0x1c); sendData(0x07); sendData(0x12);
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sendData(0x37); sendData(0x32); sendData(0x29); sendData(0x2d);
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sendData(0x29); sendData(0x25); sendData(0x2B); sendData(0x39);
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sendData(0x00); sendData(0x01); sendData(0x03); sendData(0x10);
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sendCommand(ST7735_GMCTRN1); // 2: Sparkles and rainbows, 16 args, no delay:
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sendData(0x03); sendData(0x1d); sendData(0x07); sendData(0x06);
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sendData(0x2E); sendData(0x2C); sendData(0x29); sendData(0x2D);
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sendData(0x2E); sendData(0x2E); sendData(0x37); sendData(0x3F);
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sendData(0x00); sendData(0x00); sendData(0x02); sendData(0x10);
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deselect();
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}
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select();
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sendCommand(ST7735_NORON); // 3: Normal display on, no args
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deselect();
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waitLong();
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select();
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sendCommand(ST7735_DISPON); // 4: Main screen turn on, no args
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deselect();
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waitLong();
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debugMod(NAME, "init() done");
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}
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void clean(uint16_t color){
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select();
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uint8_t lo = color & 0xFF;
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uint8_t hi = color >> 8;
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sendCommand(ST7735_CASET); // Column addr set
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sendData(0x00);
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sendData(0); // XSTART
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sendData(0x00);
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sendData(V-1); // XEND
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sendCommand(ST7735_RASET); // Row addr set
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sendData(0x00);
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sendData(0); // YSTART
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sendData(0x00);
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sendData(H-1); // YEND
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sendCommand(ST7735_RAMWR);
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for(char x=0;x<V;x++){
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for(char y=0;y<H;y++){
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sendData(lo);
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sendData(hi);
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}
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}
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deselect();
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}
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public:
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void flush(const uint16_t* data) {
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select();
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sendCommand(ST7735_CASET); // Column addr set
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sendData(0x00);
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sendData(0); // XSTART
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sendData(0x00);
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sendData(V-1); // XEND
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sendCommand(ST7735_RASET); // Row addr set
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sendData(0x00);
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sendData(0); // YSTART
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sendData(0x00);
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sendData(H-1); // YEND
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sendCommand(ST7735_RAMWR);
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modeData();
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/*
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for (int i = 0; i < (V*H); ++i) {
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const uint16_t color = data[i];
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//const uint8_t lo = color & 0xFF;
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//const uint8_t hi = color >> 8;
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//sendData(lo);
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//sendData(hi);
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//spi::writeWord(color);
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spi.writeWord(color);
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}*/
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spi.write((const uint8_t*)data, V*H*sizeof(uint16_t));
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deselect();
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}
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private:
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void sendData(uint8_t data) {
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modeData();
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spi.writeByte(data);
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}
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void sendCommand(uint8_t cmd) {
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modeCommand();
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spi.writeByte(cmd);
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}
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/** switch D/C line low */
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inline void modeCommand() {
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MyGPIO::clear(PIN_DATA_COMMAND);
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}
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/** switch D/C line high */
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inline void modeData() {
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MyGPIO::set(PIN_DATA_COMMAND);
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}
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/** set CS = low */
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inline void select() {
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MyGPIO::clear(PIN_CS);
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}
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/** set CS = high */
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inline void deselect() {
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MyGPIO::set(PIN_CS);
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}
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};
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#endif
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