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Add display init code for Lilygo TTGO T8 ESP32-S2 #4124

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merged 2 commits into from
Feb 9, 2021
Merged

Add display init code for Lilygo TTGO T8 ESP32-S2 #4124

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ff7b296
Add display init code for Lilygo TTGO T8 ESP32-S2
Feb 4, 2021
54bd79a
LCD_MISO is not connected on board
Feb 5, 2021
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106 changes: 106 additions & 0 deletions ports/esp32s2/boards/lilygo_ttgo_t8_s2_st7789/board.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,109 @@
#include "supervisor/board.h"
#include "mpconfigboard.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared-module/displayio/__init__.h"
#include "shared-module/displayio/mipi_constants.h"

#define DELAY 0x80

// display init sequence according to LilyGO example app
uint8_t display_init_sequence[] = {
// sw reset
0x01, 0 | DELAY, 150,
// sleep out
0x11, 0 | DELAY, 255,
// normal display mode on
0x13, 0,
// display and color format settings
0x36, 1, 0x08,
0xB6, 2, 0x0A, 0x82,
0x3A, 1 | DELAY, 0x55, 10,
// ST7789V frame rate setting
0xB2, 5, 0x0C, 0x0C, 0x00, 0x33, 0x33,
// voltages: VGH / VGL
0xB7, 1, 0x35,
// ST7789V power setting
0xBB, 1, 0x28,
0xC0, 1, 0x0C,
0xC2, 2, 0x01, 0xFF,
0xC3, 1, 0x10,
0xC4, 1, 0x20,
0xC6, 1, 0x0F,
0xD0, 2, 0xA4, 0xA1,
// ST7789V gamma setting
0xE0, 14, 0xD0, 0x00, 0x02, 0x07, 0x0A, 0x28, 0x32, 0x44, 0x42, 0x06, 0x0E, 0x12, 0x14, 0x17,
0xE1, 14, 0xD0, 0x00, 0x02, 0x07, 0x0A, 0x28, 0x31, 0x54, 0x47, 0x0E, 0x1C, 0x17, 0x1B, 0x1E,
0x21, 0,
// display on
0x29, 0 | DELAY, 255,
};

static void display_init(void) {
busio_spi_obj_t* spi = &displays[0].fourwire_bus.inline_bus;

common_hal_busio_spi_construct(
spi,
&pin_GPIO36, // CLK
&pin_GPIO35, // MOSI
NULL // MISO not connected
);

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_GPIO37, // DC
&pin_GPIO34, // CS
&pin_GPIO38, // RST
40000000, // baudrate
0, // polarity
0 // phase
);

displayio_display_obj_t* display = &displays[0].display;
display->base.type = &displayio_display_type;

// workaround as board_init() is called before reset_port() in main.c
pwmout_reset();

common_hal_displayio_display_construct(
display,
bus,
240, // width (after rotation)
135, // height (after rotation)
52, // column start
40, // row start
90, // 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
0x37, // set vertical scroll command
display_init_sequence,
sizeof(display_init_sequence),
&pin_GPIO33, // backlight pin
NO_BRIGHTNESS_COMMAND,
1.0f, // brightness (ignored)
false, // 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
);

common_hal_never_reset_pin(&pin_GPIO33); // backlight pin
}

void board_init(void) {
// USB
Expand All @@ -38,6 +141,9 @@ void board_init(void) {
common_hal_never_reset_pin(&pin_GPIO43);
common_hal_never_reset_pin(&pin_GPIO44);
#endif /* DEBUG */

// Display
display_init();
}

bool board_requests_safe_mode(void) {
Expand Down
3 changes: 2 additions & 1 deletion ports/esp32s2/boards/lilygo_ttgo_t8_s2_st7789/pins.c
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
#include "shared-bindings/board/__init__.h"
#include "shared-module/displayio/__init__.h"

STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_IO0), MP_ROM_PTR(&pin_GPIO0) },
Expand Down Expand Up @@ -41,13 +42,13 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_SD_CS), MP_ROM_PTR(&pin_GPIO10) },

// 1.14 inch LCD ST7789
{ MP_ROM_QSTR(MP_QSTR_LCD_MISO), MP_ROM_PTR(&pin_GPIO4) },
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{ MP_ROM_QSTR(MP_QSTR_LCD_MOSI), MP_ROM_PTR(&pin_GPIO35) },
{ MP_ROM_QSTR(MP_QSTR_LCD_CLK), MP_ROM_PTR(&pin_GPIO36) },
{ MP_ROM_QSTR(MP_QSTR_LCD_CS), MP_ROM_PTR(&pin_GPIO34) },
{ MP_ROM_QSTR(MP_QSTR_LCD_RST), MP_ROM_PTR(&pin_GPIO38) },
{ MP_ROM_QSTR(MP_QSTR_LCD_BCKL), MP_ROM_PTR(&pin_GPIO33) },
{ MP_ROM_QSTR(MP_QSTR_LCD_D_C), MP_ROM_PTR(&pin_GPIO37) },
{ MP_ROM_QSTR(MP_QSTR_DISPLAY), MP_ROM_PTR(&displays[0].display) },

// Peripheral Power control
{ MP_ROM_QSTR(MP_QSTR_PE_POWER), MP_ROM_PTR(&pin_GPIO14) },
Expand Down