display is functional now

ports/espressif/boards/m5stack_atoms3/board.c

@@ -25,5 +25,106 @@
  */
 
 #include "supervisor/board.h"
+#include "mpconfigboard.h"
+#include "shared-bindings/busio/SPI.h"
+#include "shared-bindings/displayio/FourWire.h"
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-module/displayio/__init__.h"
+#include "shared-module/displayio/mipi_constants.h"
+#include "shared-bindings/board/__init__.h"
+
+displayio_fourwire_obj_t board_display_obj;
+
+#define DELAY 0x80
+
+// display init sequence according to LilyGO example app
+uint8_t display_init_sequence[] = {
+    // sw reset
+    0x01, 0 | DELAY, 0x96,
+    // sleep out
+    0x11, 0 | DELAY, 0xff,
+    // normal display mode on
+    // 0x13, 0,
+    // display and color format settings
+    // 0x36, 1, 0x68,
+    // 0xB6, 2, 0x0A, 0x82,
+    0x3A, 1 | DELAY,  0x55, 0x0a,
+    0x36, 0x01, 0x08, // _MADCTL
+    0x21, 0x80, 0x0A, // _INVON Hack and Delay 10ms
+    0x13, 0x80, 0x0A, // _NORON and Delay 10ms
+    0x36, 0x01, 0xC0, // _MADCTL
+    // 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, 0xff
+};
+
+
+void board_init(void) {
+    displayio_fourwire_obj_t *bus = &allocate_display_bus()->fourwire_bus;
+    // busio_spi_obj_t *spi = common_hal_board_create_spi(0);
+    busio_spi_obj_t *spi = &bus->inline_bus;
+    common_hal_busio_spi_construct(spi, &pin_GPIO17, &pin_GPIO21, NULL, false);
+    common_hal_busio_spi_never_reset(spi);
+    bus->base.type = &displayio_fourwire_type;
+
+    common_hal_displayio_fourwire_construct(
+        bus,
+        spi,
+        &pin_GPIO33,    // DC
+        &pin_GPIO15,    // CS
+        &pin_GPIO34,    // RST
+        40000000,       // baudrate
+        0,              // polarity
+        0               // phase
+        );
+    displayio_display_obj_t *display = &allocate_display()->display;
+    display->base.type = &displayio_display_type;
+
+    common_hal_displayio_display_construct(
+        display,
+        bus,
+        128,            // width (after rotation)
+        128,            // height (after rotation)
+        2,             // column start
+        1,             // 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_GPIO16,    // backlight pin
+        NO_BRIGHTNESS_COMMAND,
+        1.0f,           // brightness
+        false,          // single_byte_bounds
+        false,          // data_as_commands
+        true,           // auto_refresh
+        60,             // native_frames_per_second
+        true,           // backlight_on_high
+        false,          // SH1107_addressing
+        50000           // backlight pwm frequency
+        );
+}
 
 // Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.

ports/espressif/boards/m5stack_atoms3/mpconfigboard.h

@@ -34,3 +34,6 @@
 #define CIRCUITPY_BOARD_I2C         (2)
 #define CIRCUITPY_BOARD_I2C_PIN     {{.scl = &pin_GPIO39, .sda = &pin_GPIO38}, \
                                      {.scl = &pin_GPIO1, .sda = &pin_GPIO2}}
+
+#define DEFAULT_SPI_BUS_SCK (&pin_GPIO17)
+#define DEFAULT_SPI_BUS_MOSI (&pin_GPIO21)

ports/espressif/boards/m5stack_atoms3/pins.c

@@ -27,7 +27,9 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_D8), MP_ROM_PTR(&pin_GPIO8) },
 
     { MP_ROM_QSTR(MP_QSTR_D39), MP_ROM_PTR(&pin_GPIO39) },
+    { MP_ROM_QSTR(MP_QSTR_IMU_SCL), MP_ROM_PTR(&pin_GPIO39) },
     { MP_ROM_QSTR(MP_QSTR_D38), MP_ROM_PTR(&pin_GPIO38) },
+    { MP_ROM_QSTR(MP_QSTR_IMU_SDA), MP_ROM_PTR(&pin_GPIO38) },
 
     // lcd spi bus
     { MP_ROM_QSTR(MP_QSTR_LCD_MOSI), MP_ROM_PTR(&pin_GPIO21) },
@@ -43,6 +45,7 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
 
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
     { MP_ROM_QSTR(MP_QSTR_PORTA_I2C), MP_ROM_PTR(&board_porta_i2c_obj) },
+    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
 
     { MP_ROM_QSTR(MP_QSTR_DISPLAY), MP_ROM_PTR(&displays[0].display)}
 };