functional epd

Author: SeanTheITGuy

ports/espressif/boards/elecrow_crowpanel_4_2_epaper/board.c

@@ -5,5 +5,108 @@
 // SPDX-License-Identifier: MIT
 
 #include "supervisor/board.h"
+#include "mpconfigboard.h"
+#include "shared-bindings/busio/SPI.h"
+#include "shared-bindings/fourwire/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"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+
+const uint8_t display_start_sequence[] = {
+    // Init
+    0x12, 0x80, 0x0a,                   // Soft reset
+    0x01, 0x03, 0x2b, 0x01, 0x00,       // Set MUX as 300
+    0x21, 0x02, 0x40, 0x00,             // Display update control
+    0x3c, 0x01, 0x01,                   // Border waveform
+    0x11, 0x01, 0x03,                   // X- mode
+    0x44, 0x02, 0x00, 0x31,             // Set RAM X Address Start/End Pos
+    0x45, 0x04, 0x00, 0x00, 0x2b, 0x01, // Set RAM Y Address Start/End Pos
+    0x4e, 0x01, 0x00,                   // Set RAM X Address counter
+    0x4f, 0x02, 0x00, 0x00,             // Set RAM Y Address counter
+};
+
+const uint8_t display_stop_sequence[] = {
+    0x10, 0x01, 0x32,
+};
+
+const uint8_t refresh_sequence[] = {
+    0x22, 0x01, 0xf7,                   // Display update sequence option
+    0x20, 0x80, 0x0a,                   // Master activation
+};
+
+void board_init(void) {
+
+    // Enable EPD with driver pin
+    digitalio_digitalinout_obj_t epd_enable_pin_obj;
+    epd_enable_pin_obj.base.type = &digitalio_digitalinout_type;
+    common_hal_digitalio_digitalinout_construct(&epd_enable_pin_obj, &pin_GPIO7);
+    common_hal_digitalio_digitalinout_switch_to_output(&epd_enable_pin_obj, true, DRIVE_MODE_PUSH_PULL);
+    common_hal_digitalio_digitalinout_never_reset(&epd_enable_pin_obj);
+
+    // Set up the SPI object used to control the display
+    fourwire_fourwire_obj_t *bus = &allocate_display_bus()->fourwire_bus;
+    busio_spi_obj_t *spi = &bus->inline_bus;
+    common_hal_busio_spi_construct(spi, &pin_GPIO12, &pin_GPIO11, NULL, false);
+    common_hal_busio_spi_never_reset(spi);
+
+    // Set up the DisplayIO pin object
+    bus->base.type = &fourwire_fourwire_type;
+    common_hal_fourwire_fourwire_construct(bus,
+        spi,
+        &pin_GPIO46, // EPD_DC Command or data
+        &pin_GPIO45, // EPD_CS Chip select
+        &pin_GPIO47, // EPD_RST Reset
+        1000000, // Baudrate
+        0, // Polarity
+        0); // Phase
+
+// Set up the DisplayIO epaper object
+    epaperdisplay_epaperdisplay_obj_t *display = &allocate_display()->epaper_display;
+    display->base.type = &epaperdisplay_epaperdisplay_type;
+    common_hal_epaperdisplay_epaperdisplay_construct(
+        display,
+        bus,
+        display_start_sequence, sizeof(display_start_sequence),
+        1, // start up time
+        display_stop_sequence, sizeof(display_stop_sequence),
+        400, // width
+        300, // height
+        400, // ram_width
+        300, // ram_height
+        0, // colstart
+        0, // rowstart
+        0, // rotation
+        NO_COMMAND, // set_column_window_command
+        NO_COMMAND, // set_row_window_command
+        NO_COMMAND, // set_current_column_command
+        NO_COMMAND, // set_current_row_command
+        0x24, // write_black_ram_command
+        false, // black_bits_inverted
+        0x26, // write_color_ram_command
+        false, // color_bits_inverted
+        0x000000, // highlight_color
+        refresh_sequence, sizeof(refresh_sequence), // refresh_display_command
+        1.0, // refresh_time
+        &pin_GPIO48, // busy_pin
+        true, // busy_state
+        2.0, // seconds_per_frame
+        false, // always_toggle_chip_select
+        false, // grayscale
+        false, // acep
+        false, // two_byte_sequence_length
+        false); // address_little_endian
+}
+
+void board_deinit(void) {
+    epaperdisplay_epaperdisplay_obj_t *display = &displays[0].epaper_display;
+    if (display->base.type == &epaperdisplay_epaperdisplay_type) {
+        while (common_hal_epaperdisplay_epaperdisplay_get_busy(display)) {
+            RUN_BACKGROUND_TASKS;
+        }
+    }
+    common_hal_displayio_release_displays();
+}
 
 // Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.