From 1b5e98e2faecba9310e34945aec83ad4dac43017 Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@unpythonic.net>
Date: Mon, 6 Dec 2021 09:53:18 -0600
Subject: [PATCH] esp32s3 box: add display

---
 .../boards/espressif_esp32s3_box/board.c      | 61 +++++++++++++++++++
 .../boards/espressif_esp32s3_box/pins.c       |  3 +
 2 files changed, 64 insertions(+)

diff --git a/ports/espressif/boards/espressif_esp32s3_box/board.c b/ports/espressif/boards/espressif_esp32s3_box/board.c
index dbe64077de..c425c5c24e 100644
--- a/ports/espressif/boards/espressif_esp32s3_box/board.c
+++ b/ports/espressif/boards/espressif_esp32s3_box/board.c
@@ -28,7 +28,68 @@
 #include "mpconfigboard.h"
 #include "shared-bindings/microcontroller/Pin.h"
 
+#include "shared-bindings/busio/SPI.h"
+#include "shared-bindings/displayio/FourWire.h"
+#include "shared-module/displayio/__init__.h"
+#include "shared-module/displayio/mipi_constants.h"
+
+uint8_t display_init_sequence[] = {
+    0x01, 0x80, 0x96, //  _SWRESET and Delay 150ms
+    0x11, 0x80, 0xFF, //  _SLPOUT and Delay 500ms
+    0x3A, 0x81, 0x55, 0x0A, //  _COLMOD and Delay 10ms
+    0x36, 0x01, 0x08, //  _MADCTL
+    0x13, 0x80, 0x0A, //  _NORON and Delay 10ms
+    0x36, 0x01, 0xC0, //  _MADCTL
+    0x29, 0x80, 0xFF, //  _DISPON and Delay 500ms
+};
+
 void board_init(void) {
+    busio_spi_obj_t *spi = &displays[0].fourwire_bus.inline_bus;
+    common_hal_busio_spi_construct(spi, &pin_GPIO7, &pin_GPIO6, NULL);
+    common_hal_busio_spi_never_reset(spi);
+
+    displayio_fourwire_obj_t *bus = &displays[0].fourwire_bus;
+    bus->base.type = &displayio_fourwire_type;
+    common_hal_displayio_fourwire_construct(bus,
+        spi,
+        &pin_GPIO4, // TFT_DC Command or data
+        &pin_GPIO5, // TFT_CS Chip select
+        &pin_GPIO48, // TFT_RST Reset
+        60000000, // Baudrate
+        0, // Polarity
+        0); // Phase
+
+    displayio_display_obj_t *display = &displays[0].display;
+    display->base.type = &displayio_display_type;
+    common_hal_displayio_display_construct(display,
+        bus,
+        320, // Width
+        240, // Height
+        0, // column start
+        0, // row start
+        0, // rotation
+        16, // Color depth
+        false, // Grayscale
+        false, // pixels in a byte share a row. Only valid for depths < 8
+        1, // bytes per cell. Only valid for depths < 8
+        false, // reverse_pixels_in_byte. Only valid for depths < 8
+        true, // reverse_pixels_in_word
+        MIPI_COMMAND_SET_COLUMN_ADDRESS, // Set column command
+        MIPI_COMMAND_SET_PAGE_ADDRESS, // Set row command
+        MIPI_COMMAND_WRITE_MEMORY_START, // Write memory command
+        display_init_sequence,
+        sizeof(display_init_sequence),
+        &pin_GPIO45,  // backlight pin
+        NO_BRIGHTNESS_COMMAND,
+        1.0f, // brightness (ignored)
+        true, // auto_brightness
+        false, // single_byte_bounds
+        false, // data_as_commands
+        true, // auto_refresh
+        60, // native_frames_per_second
+        true, // backlight_on_high
+        false); // SH1107_addressing
+
     // USB
     common_hal_never_reset_pin(&pin_GPIO19);
     common_hal_never_reset_pin(&pin_GPIO20);
diff --git a/ports/espressif/boards/espressif_esp32s3_box/pins.c b/ports/espressif/boards/espressif_esp32s3_box/pins.c
index b4fd11a298..73ef15697c 100644
--- a/ports/espressif/boards/espressif_esp32s3_box/pins.c
+++ b/ports/espressif/boards/espressif_esp32s3_box/pins.c
@@ -1,4 +1,5 @@
 #include "shared-bindings/board/__init__.h"
+#include "shared-module/displayio/__init__.h"
 
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
@@ -60,5 +61,7 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
 
     // boot button, also usable as a software button
     { MP_ROM_QSTR(MP_QSTR_BOOT), MP_ROM_PTR(&pin_GPIO0) },
+
+    { MP_ROM_QSTR(MP_QSTR_DISPLAY), MP_ROM_PTR(&displays[0].display)}
 };
 MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);