[ili9xxx] Implement st7735 support (#6838)

esphome/components/ili9xxx/display.py

@@ -69,6 +69,7 @@ MODELS = {
     "ILI9486": ili9xxx_ns.class_("ILI9XXXILI9486", ILI9XXXDisplay),
     "ILI9488": ili9xxx_ns.class_("ILI9XXXILI9488", ILI9XXXDisplay),
     "ILI9488_A": ili9xxx_ns.class_("ILI9XXXILI9488A", ILI9XXXDisplay),
+    "ST7735": ili9xxx_ns.class_("ILI9XXXST7735", ILI9XXXDisplay),
     "ST7796": ili9xxx_ns.class_("ILI9XXXST7796", ILI9XXXDisplay),
     "ST7789V": ili9xxx_ns.class_("ILI9XXXST7789V", ILI9XXXDisplay),
     "S3BOX": ili9xxx_ns.class_("ILI9XXXS3Box", ILI9XXXDisplay),
@@ -134,6 +135,7 @@ def _validate(config):
         "ILI9341",
         "ILI9342",
         "ST7789V",
+        "ST7735",
     ]:
         raise cv.Invalid("Selected model can't run on ESP8266.")
 

esphome/components/ili9xxx/ili9xxx_defines.h

@@ -70,6 +70,7 @@ static const uint8_t ILI9XXX_PWCTR2 = 0xC1;
 static const uint8_t ILI9XXX_PWCTR3 = 0xC2;
 static const uint8_t ILI9XXX_PWCTR4 = 0xC3;
 static const uint8_t ILI9XXX_PWCTR5 = 0xC4;
+static const uint8_t ILI9XXX_PWCTR6 = 0xF6;
 static const uint8_t ILI9XXX_VMCTR1 = 0xC5;
 static const uint8_t ILI9XXX_IFCTR = 0xC6;
 static const uint8_t ILI9XXX_VMCTR2 = 0xC7;
@@ -91,6 +92,7 @@ static const uint8_t ILI9XXX_GMCTRN1 = 0xE1;
 
 static const uint8_t ILI9XXX_CSCON = 0xF0;
 static const uint8_t ILI9XXX_ADJCTL3 = 0xF7;
+static const uint8_t ILI9XXX_DELAY = 0xFF;  // followed by one byte of delay time in ms
 
 }  // namespace ili9xxx
 }  // namespace esphome

esphome/components/ili9xxx/ili9xxx_display.cpp

@@ -411,13 +411,21 @@ void ILI9XXXDisplay::init_lcd_(const uint8_t *addr) {
   uint8_t cmd, x, num_args;
   while ((cmd = *addr++) != 0) {
     x = *addr++;
+    if (cmd == ILI9XXX_DELAY) {
+      ESP_LOGD(TAG, "Delay %dms", x);
+      delay(x);
+    } else {
       num_args = x & 0x7F;
+      ESP_LOGD(TAG, "Command %02X, length %d, bits %02X", cmd, num_args, *addr);
       this->send_command(cmd, addr, num_args);
       addr += num_args;
-    if (x & 0x80)
+      if (x & 0x80) {
+        ESP_LOGD(TAG, "Delay 150ms");
         delay(150);  // NOLINT
       }
     }
+  }
+}
 
 // Tell the display controller where we want to draw pixels.
 void ILI9XXXDisplay::set_addr_window_(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2) {

esphome/components/ili9xxx/ili9xxx_display.h

@@ -35,7 +35,6 @@ class ILI9XXXDisplay : public display::DisplayBuffer,
     while ((cmd = *addr++) != 0) {
       num_args = *addr++ & 0x7F;
       bits = *addr;
-      esph_log_d(TAG, "Command %02X, length %d, bits %02X", cmd, num_args, bits);
       switch (cmd) {
         case ILI9XXX_MADCTL: {
           this->swap_xy_ = (bits & MADCTL_MV) != 0;
@@ -51,6 +50,9 @@ class ILI9XXXDisplay : public display::DisplayBuffer,
           break;
         }
 
+        case ILI9XXX_DELAY:
+          continue;  // no args to skip
+
         default:
           break;
       }
@@ -269,5 +271,11 @@ class ILI9XXXGC9A01A : public ILI9XXXDisplay {
   ILI9XXXGC9A01A() : ILI9XXXDisplay(INITCMD_GC9A01A, 240, 240, true) {}
 };
 
+//-----------   ILI9XXX_24_TFT display --------------
+class ILI9XXXST7735 : public ILI9XXXDisplay {
+ public:
+  ILI9XXXST7735() : ILI9XXXDisplay(INITCMD_ST7735, 128, 160, false) {}
+};
+
 }  // namespace ili9xxx
 }  // namespace esphome

esphome/components/ili9xxx/ili9xxx_init.h

@@ -370,6 +370,57 @@ static const uint8_t PROGMEM INITCMD_GC9A01A[] = {
   0x00                  // End of list
 };
 
+static const uint8_t PROGMEM INITCMD_ST7735[] = {
+    ILI9XXX_SWRESET, 0,         // Soft reset, then delay 10ms
+    ILI9XXX_DELAY, 10,
+    ILI9XXX_SLPOUT  , 0,                // Exit Sleep, delay
+    ILI9XXX_DELAY, 10,
+    ILI9XXX_PIXFMT  , 1, 0x05,
+    ILI9XXX_FRMCTR1, 3, //  4: Frame rate control, 3 args + delay:
+    0x01, 0x2C, 0x2D,             //     Rate = fosc/(1x2+40) * (LINE+2C+2D)
+    ILI9XXX_FRMCTR2, 3,              //  4: Framerate ctrl - idle mode, 3 args:
+    0x01, 0x2C, 0x2D,             //     Rate = fosc/(1x2+40) * (LINE+2C+2D)
+    ILI9XXX_FRMCTR3, 6,              //  5: Framerate - partial mode, 6 args:
+    0x01, 0x2C, 0x2D,             //     Dot inversion mode
+    0x01, 0x2C, 0x2D,             //     Line inversion mode
+
+    ILI9XXX_INVCTR, 1,              //  7: Display inversion control, 1 arg:
+    0x7,                          //     Line inversion
+    ILI9XXX_PWCTR1,  3,              //  7: Power control, 3 args, no delay:
+    0xA2,
+    0x02,                         //     -4.6V
+    0x84,                         //     AUTO mode
+    ILI9XXX_PWCTR2,  1,              //  8: Power control, 1 arg, no delay:
+    0xC5,                         //     VGH25=2.4C VGSEL=-10 VGH=3 * AVDD
+    ILI9XXX_PWCTR3,  2,              //  9: Power control, 2 args, no delay:
+    0x0A,                         //     Opamp current small
+    0x00,                         //     Boost frequency
+    ILI9XXX_PWCTR4,  2,              // 10: Power control, 2 args, no delay:
+    0x8A,                         //     BCLK/2,
+    0x2A,                         //     opamp current small & medium low
+    ILI9XXX_PWCTR5,  2,              // 11: Power control, 2 args, no delay:
+    0x8A, 0xEE,
+
+    ILI9XXX_VMCTR1, 1, // 11: Power control, 2 args + delay:
+    0x0E,
+    ILI9XXX_GMCTRP1, 16,              // 13: Gamma Adjustments (pos. polarity), 16 args + delay:
+    0x02, 0x1c, 0x07, 0x12,       //     (Not entirely necessary, but provides
+    0x37, 0x32, 0x29, 0x2d,       //      accurate colors)
+    0x29, 0x25, 0x2B, 0x39,
+    0x00, 0x01, 0x03, 0x10,
+    ILI9XXX_GMCTRN1, 16, // 14: Gamma Adjustments (neg. polarity), 16 args + delay:
+    0x03, 0x1d, 0x07, 0x06,       //     (Not entirely necessary, but provides
+    0x2E, 0x2C, 0x29, 0x2D,       //      accurate colors)
+    0x2E, 0x2E, 0x37, 0x3F,
+    0x00, 0x00, 0x02, 0x10,
+    ILI9XXX_MADCTL  , 1, 0x00,             // Memory Access Control, BGR
+    ILI9XXX_NORON  , 0,
+    ILI9XXX_DELAY, 10,
+    ILI9XXX_DISPON  , 0,                // Display on
+    ILI9XXX_DELAY, 10,
+    00,   // endo of list
+};
+
 // clang-format on
 }  // namespace ili9xxx
 }  // namespace esphome