added board.c

Author: SeanTheITGuy

ports/espressif/boards/elecrow_crowpanel_4_2_epaper/board.c

@@ -1,11 +1,92 @@
 // This file is part of the CircuitPython project: https://circuitpython.org
 //
-// SPDX-FileCopyrightText: Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+// SPDX-FileCopyrightText: Copyright (c) 2020 Joey Castillo
 //
 // SPDX-License-Identifier: MIT
 
 #include "supervisor/board.h"
+#include "mpconfigboard.h"
+#include "hal/include/hal_gpio.h"
+#include "shared-bindings/busio/SPI.h"
+#include "shared-bindings/fourwire/FourWire.h"
+#include "shared-bindings/time/__init__.h"
+#include "shared-module/displayio/__init__.h"
+#include "shared-module/displayio/mipi_constants.h"
 
-// Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.
 
-// TODO:
+#define DELAY 0x80
+#define HEIGHT 300
+#define WIDTH 400
+
+uint8_t start_sequence[] = {
+    0x01, 0x04, 0x03, 0x00, 0x2b, 0x2b, // power setting
+    0x06, 0x03, 0x17, 0x17, 0x17, // booster soft start
+    0x04, 0x80, 0xc8, // power on and wait 200 ms
+    0x00, 0x01, 0x0f, // panel setting
+    0x61, 0x04, (HEIGHT >> 8) & 0xFF, HEIGHT & 0xFF, (WIDTH >> 8) & 0xFF, WIDTH & 0xFF // Resolution
+};
+
+uint8_t stop_sequence[] = {
+    0x50, 0x01, 0xf7, // CDI setting
+    0x02, 0x80, 0xf0  // Power off
+};
+
+uint8_t refresh_sequence[] = {
+    0x12, 0x00
+};
+
+void board_init(void) {
+    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);
+
+    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
+
+    epaperdisplay_epaperdisplay_obj_t *display = &allocate_display()->epaper_display;
+    display->base.type = &epaperdisplay_epaperdisplay_type;
+    common_hal_epaperdisplay_epaperdisplay_construct(display,
+        bus,
+        start_sequence,
+        sizeof(start_sequence),
+        0, // start up time
+        stop_sequence,
+        sizeof(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
+        0x13, // write_black_ram_command
+        false, // black_bits_inverted
+        NO_COMMAND, // write_color_ram_command (can add this for grayscale eventually)
+        false, // color_bits_inverted
+        0x000000, // highlight_color
+        refresh_sequence, // refresh_display_sequence
+        sizeof(refresh_sequence),
+        40, // refresh_time
+        &pin_GPIO48, // busy_pin
+        false, // busy_state
+        5, // seconds_per_frame
+        false, // chip_select (don't always toggle chip select)
+        false, // grayscale
+        false, // acep
+        false, // two_byte_sequence_length
+        false); // address_little_endian
+}
+
+// Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.