From 37cfe8ca961844332e543340fb194057bf9021cb Mon Sep 17 00:00:00 2001
From: Phil Howard <phil@gadgetoid.com>
Date: Wed, 7 Aug 2024 22:36:59 +0100
Subject: [PATCH] PicoGraphics: Support for Explorer.

---
 drivers/st7789/st7789.hpp                         |  3 ++-
 micropython/modules/picographics/picographics.c   |  1 +
 micropython/modules/picographics/picographics.cpp | 14 +++++++++++++-
 micropython/modules/picographics/picographics.h   |  3 ++-
 4 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/st7789/st7789.hpp b/drivers/st7789/st7789.hpp
index e4ad2ee6f..52369256f 100644
--- a/drivers/st7789/st7789.hpp
+++ b/drivers/st7789/st7789.hpp
@@ -58,9 +58,10 @@ namespace pimoroni {
       cs(pins.cs), dc(pins.dc), wr_sck(pins.wr_sck), rd_sck(pins.rd_sck), d0(pins.d0), bl(pins.bl) {
 
       parallel_pio = pio1;
+      pio_set_gpio_base(parallel_pio, d0 + 8 >= 32 ? 16 : 0);
       parallel_sm = pio_claim_unused_sm(parallel_pio, true);
       parallel_offset = pio_add_program(parallel_pio, &st7789_parallel_program);
-  
+
       //gpio_init(wr_sck);
       //gpio_set_dir(wr_sck, GPIO_OUT);
       //gpio_set_function(wr_sck, GPIO_FUNC_SIO);
diff --git a/micropython/modules/picographics/picographics.c b/micropython/modules/picographics/picographics.c
index b1aeec19e..0074b55f0 100644
--- a/micropython/modules/picographics/picographics.c
+++ b/micropython/modules/picographics/picographics.c
@@ -157,6 +157,7 @@ static const mp_map_elem_t picographics_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_DISPLAY_UNICORN_PACK), MP_ROM_INT(DISPLAY_UNICORN_PACK) },
     { MP_ROM_QSTR(MP_QSTR_DISPLAY_SCROLL_PACK), MP_ROM_INT(DISPLAY_SCROLL_PACK) },
     { MP_ROM_QSTR(MP_QSTR_DISPLAY_PICO_W_EXPLORER), MP_ROM_INT(DISPLAY_PICO_W_EXPLORER) },
+    { MP_ROM_QSTR(MP_QSTR_DISPLAY_EXPLORER), MP_ROM_INT(DISPLAY_EXPLORER) },
 
     { MP_ROM_QSTR(MP_QSTR_PEN_1BIT), MP_ROM_INT(PEN_1BIT) },
     { MP_ROM_QSTR(MP_QSTR_PEN_P4), MP_ROM_INT(PEN_P4) },
diff --git a/micropython/modules/picographics/picographics.cpp b/micropython/modules/picographics/picographics.cpp
index 4fe1e2d04..a55e8ad41 100644
--- a/micropython/modules/picographics/picographics.cpp
+++ b/micropython/modules/picographics/picographics.cpp
@@ -44,6 +44,13 @@ typedef struct _ModPicoGraphics_obj_t {
 
 bool get_display_settings(PicoGraphicsDisplay display, int &width, int &height, int &rotate, int &pen_type, PicoGraphicsBusType &bus_type) {
     switch(display) {
+        case DISPLAY_EXPLORER:
+            width = 320;
+            height = 240;
+            bus_type = BUS_PARALLEL;
+            if(rotate == -1) rotate = (int)Rotation::ROTATE_0;
+            if(pen_type == -1) pen_type = PEN_RGB565;
+            break;
         case DISPLAY_PICO_DISPLAY:
             width = 240;
             height = 135;
@@ -335,6 +342,10 @@ mp_obj_t ModPicoGraphics_make_new(const mp_obj_type_t *type, size_t n_args, size
             } else if (display == DISPLAY_PICO_W_EXPLORER) {
                 spi_bus = {PIMORONI_SPI_DEFAULT_INSTANCE, 17, SPI_DEFAULT_SCK, SPI_DEFAULT_MOSI, PIN_UNUSED, SPI_DEFAULT_MISO, 9};
             }
+        } else if (bus_type == BUS_PARALLEL) {
+            if (display == DISPLAY_EXPLORER) {
+                parallel_bus = {27, 28, 30, 31, 32, 26};
+            }
         }
     }
 
@@ -349,7 +360,8 @@ mp_obj_t ModPicoGraphics_make_new(const mp_obj_type_t *type, size_t n_args, size
         // TODO grab BUSY and RESET from ARG_extra_pins
         self->display = m_new_class(Inky73, width, height, (Rotation)rotate, spi_bus);
 
-    } else if (display == DISPLAY_TUFTY_2040) {
+    } else if (display == DISPLAY_TUFTY_2040
+            || display == DISPLAY_EXPLORER) {
         self->display = m_new_class(ST7789, width, height, (Rotation)rotate, parallel_bus);
 
     } else if (display == DISPLAY_LCD_160X80) {
diff --git a/micropython/modules/picographics/picographics.h b/micropython/modules/picographics/picographics.h
index 1812a875f..655d336b7 100644
--- a/micropython/modules/picographics/picographics.h
+++ b/micropython/modules/picographics/picographics.h
@@ -30,7 +30,8 @@ enum PicoGraphicsDisplay {
     DISPLAY_STELLAR_UNICORN,
     DISPLAY_UNICORN_PACK,
     DISPLAY_SCROLL_PACK,
-    DISPLAY_PICO_W_EXPLORER
+    DISPLAY_PICO_W_EXPLORER,
+    DISPLAY_EXPLORER
 };
 
 enum PicoGraphicsPenType {