acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
Arduino_ST7735.cpp (3693B)
      1 /*
      2  * start rewrite from:
      3  * https://github.com/adafruit/Adafruit-GFX-Library.git
      4  */
      5 #include "Arduino_ST7735.h"
      6 #include "SPI.h"
      7 
      8 Arduino_ST7735::Arduino_ST7735(
      9     Arduino_DataBus *bus, int8_t rst, uint8_t r,
     10     bool ips, int16_t w, int16_t h,
     11     uint8_t col_offset1, uint8_t row_offset1, uint8_t col_offset2, uint8_t row_offset2,
     12     bool bgr)
     13     : Arduino_TFT(bus, rst, r, ips, w, h, col_offset1, row_offset1, col_offset2, row_offset2), _bgr(bgr)
     14 {
     15 }
     16 
     17 bool Arduino_ST7735::begin(int32_t speed)
     18 {
     19 #if defined(ESP8266) || defined(ESP32)
     20   if (speed == GFX_NOT_DEFINED)
     21   {
     22     speed = 27000000UL; // ST7735 Maximum supported speed
     23   }
     24 // Teensy 4.x
     25 #elif defined(__IMXRT1052__) || defined(__IMXRT1062__)
     26   if (speed == GFX_NOT_DEFINED)
     27   {
     28     speed = 27000000UL; // ST7735 Maximum supported speed
     29   }
     30 #endif
     31   _override_datamode = SPI_MODE0; // always use SPI_MODE0
     32 
     33   return Arduino_TFT::begin(speed);
     34 }
     35 
     36 // Companion code to the above tables.  Reads and issues
     37 // a series of LCD commands stored in PROGMEM byte array.
     38 void Arduino_ST7735::tftInit()
     39 {
     40   if (_rst != GFX_NOT_DEFINED)
     41   {
     42     pinMode(_rst, OUTPUT);
     43     digitalWrite(_rst, HIGH);
     44     delay(100);
     45     digitalWrite(_rst, LOW);
     46     delay(ST7735_RST_DELAY);
     47     digitalWrite(_rst, HIGH);
     48     delay(ST7735_RST_DELAY);
     49   }
     50   else
     51   {
     52     // Software Rest
     53     _bus->sendCommand(ST7735_SWRESET); // 1: Software reset
     54     delay(ST7735_RST_DELAY);
     55   }
     56 
     57   _bus->batchOperation(st7735_init_operations, sizeof(st7735_init_operations));
     58 
     59   if (_ips)
     60   {
     61     _bus->sendCommand(ST7735_INVON);
     62   }
     63 }
     64 
     65 void Arduino_ST7735::writeAddrWindow(int16_t x, int16_t y, uint16_t w, uint16_t h)
     66 {
     67   if ((x != _currentX) || (w != _currentW))
     68   {
     69     int16_t x_start = x + _xStart, x_end = x + w - 1 + _xStart;
     70 
     71     _bus->writeCommand(ST7735_CASET); // Column addr set
     72     _bus->write(x_start >> 8);
     73     _bus->write(x_start & 0xFF); // XSTART
     74     _bus->write(x_end >> 8);
     75     _bus->write(x_end & 0xFF); // XEND
     76 
     77     _currentX = x;
     78     _currentW = w;
     79   }
     80   if ((y != _currentY) || (h != _currentH))
     81   {
     82     int16_t y_start = y + _yStart, y_end = y + h - 1 + _yStart;
     83 
     84     _bus->writeCommand(ST7735_RASET); // Row addr set
     85     _bus->write(y_start >> 8);
     86     _bus->write(y_start & 0xFF); // YSTART
     87     _bus->write(y_end >> 8);
     88     _bus->write(y_end & 0xFF); // YEND
     89 
     90     _currentY = y;
     91     _currentH = h;
     92   }
     93 
     94   _bus->writeCommand(ST7735_RAMWR); // write to RAM
     95 }
     96 
     97 /**************************************************************************/
     98 /*!
     99     @brief   Set origin of (0,0) and orientation of TFT display
    100     @param   m  The index for rotation, from 0-3 inclusive
    101 */
    102 /**************************************************************************/
    103 void Arduino_ST7735::setRotation(uint8_t r)
    104 {
    105   Arduino_TFT::setRotation(r);
    106   switch (_rotation)
    107   {
    108   case 1:
    109     r = ST7735_MADCTL_MY | ST7735_MADCTL_MV | (_bgr ? ST7735_MADCTL_BGR : ST7735_MADCTL_RGB);
    110     break;
    111   case 2:
    112     r = (_bgr ? ST7735_MADCTL_BGR : ST7735_MADCTL_RGB);
    113     break;
    114   case 3:
    115     r = ST7735_MADCTL_MX | ST7735_MADCTL_MV | (_bgr ? ST7735_MADCTL_BGR : ST7735_MADCTL_RGB);
    116     break;
    117   default: // case 0:
    118     r = ST7735_MADCTL_MX | ST7735_MADCTL_MY | (_bgr ? ST7735_MADCTL_BGR : ST7735_MADCTL_RGB);
    119     break;
    120   }
    121   _bus->beginWrite();
    122   _bus->writeCommand(ST7735_MADCTL);
    123   _bus->write(r);
    124   _bus->endWrite();
    125 }
    126 
    127 void Arduino_ST7735::invertDisplay(bool i)
    128 {
    129   _bus->sendCommand(_ips ? (i ? ST7735_INVOFF : ST7735_INVON) : (i ? ST7735_INVON : ST7735_INVOFF));
    130 }
    131 
    132 void Arduino_ST7735::displayOn(void)
    133 {
    134   _bus->sendCommand(ST7735_SLPOUT);
    135   delay(ST7735_SLPOUT_DELAY);
    136 }
    137 
    138 void Arduino_ST7735::displayOff(void)
    139 {
    140   _bus->sendCommand(ST7735_SLPIN);
    141   delay(ST7735_SLPIN_DELAY);
    142 }