From 14c34b47d4549f4f5229200eefb124d61bec3432 Mon Sep 17 00:00:00 2001
From: Vladimir Garistov <vl.garistov@gmail.com>
Date: Sat, 2 Oct 2021 16:51:36 +0300
Subject: [PATCH] Added an example for a big RGB LED matrix

---
 Examples/Big_LED_strip/Big_LED_strip.ino | 164 +++++++++++++++++++++++
 Examples/Big_LED_strip/elsys.ppm         | Bin 0 -> 780 bytes
 2 files changed, 164 insertions(+)
 create mode 100644 Examples/Big_LED_strip/Big_LED_strip.ino
 create mode 100644 Examples/Big_LED_strip/elsys.ppm

diff --git a/Examples/Big_LED_strip/Big_LED_strip.ino b/Examples/Big_LED_strip/Big_LED_strip.ino
new file mode 100644
index 0000000..168afe7
--- /dev/null
+++ b/Examples/Big_LED_strip/Big_LED_strip.ino
@@ -0,0 +1,164 @@
+#include <Adafruit_NeoPixel.h>
+#include <inttypes.h>
+
+#define LED_PIN				12
+#define ROWS				8
+#define COLS				32
+#define NUM_PIXELS			(ROWS * COLS)
+#define PPM_HEADER_LENGHT	12
+#define BIG_IMAGE_FILE_SIZE	780
+#define DIMM				4
+
+#define NEOPIXEL_ATE_MY_RAM
+
+int render_image(uint8_t buff[ROWS][COLS][3], const uint8_t image[]);
+int display_rgb(uint8_t buff[ROWS][COLS][3]);
+int display_rgb_direct(const uint8_t image[]);
+
+static const uint8_t big_image_data[BIG_IMAGE_FILE_SIZE] =
+{
+	0x50, 0x36, 0x0a, 0x33, 0x32, 0x20, 0x38, 0x0a, 0x32, 0x35, 0x35, 0x0a, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21,
+	0x96, 0xf3, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3,
+	0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21, 0x96,
+	0xf3, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd5, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00,
+	0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00,
+	0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21,
+	0x96, 0xf3, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3,
+	0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21,
+	0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21, 0x96,
+	0xf3, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00,
+	0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21,
+	0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd5, 0x00, 0x00,
+	0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21,
+	0x96, 0xf3, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21, 0x96,
+	0xf3, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3,
+	0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21,
+	0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0x96, 0xf3, 0x21, 0x96,
+	0xf3, 0x21, 0x96, 0xf3, 0x21, 0x96, 0xf3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0xd5, 0x00, 0x00, 0xd5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+Adafruit_NeoPixel led_matrix(NUM_PIXELS, LED_PIN, NEO_GRB);
+
+void setup()
+{
+	pinMode(LED_PIN, OUTPUT);
+	led_matrix.begin();
+}
+
+void loop()
+{
+	uint8_t frame_buffer[ROWS][COLS][3] = {{{0}}};
+
+	#ifdef NEOPIXEL_ATE_MY_RAM
+	render_image(frame_buffer, big_image_data);
+	display_rgb(frame_buffer);
+	#else
+	display_rgb_direct(big_image_data);
+	#endif
+}
+
+int render_image(uint8_t buff[ROWS][COLS][3], const uint8_t image[])
+{
+	if (buff == NULL || image == NULL)
+		return -1;
+
+	for (uint8_t row = 0; row < ROWS; row++)
+	{
+		for (uint8_t col = 0; col < COLS; col++)
+		{
+			for (uint8_t i = 0; i < 3; i++)
+			{
+				buff[row][col][i] = image[PPM_HEADER_LENGHT + row * COLS * 3 + col * 3 + i];
+			}
+		}
+	}
+
+	return 0;
+}
+
+int display_rgb(uint8_t buff[ROWS][COLS][3])
+{
+	if (buff == NULL)
+		return -1;
+
+	for (uint8_t col = 0; col < COLS; col += 2)
+	{
+		for (uint8_t row = 0; row < ROWS; row++)
+		{
+			led_matrix.setPixelColor(col * ROWS + row, led_matrix.Color(buff[row][col][0] / DIMM,
+																		buff[row][col][1] / DIMM,
+																		buff[row][col][2] / DIMM));
+		}
+	}
+	for (uint8_t col = 1; col < COLS; col += 2)
+	{
+		for (uint8_t row = 0; row < ROWS; row++)
+		{
+			led_matrix.setPixelColor((col + 1) * ROWS - row - 1, led_matrix.Color(buff[row][col][0] / DIMM,
+																				  buff[row][col][1] / DIMM,
+																				  buff[row][col][2] / DIMM));
+		}
+	}
+	led_matrix.show();
+
+	return 0;
+}
+
+int display_rgb_direct(const uint8_t image[])
+{
+	if (image == NULL)
+		return -1;
+
+	for (uint8_t col = 0; col < COLS; col += 2)
+	{
+		for (uint8_t row = 0; row < ROWS; row++)
+		{
+			led_matrix.setPixelColor(col * ROWS + row, led_matrix.Color(image[PPM_HEADER_LENGHT + row * COLS * 3 + col * 3] / DIMM,
+																		image[PPM_HEADER_LENGHT + row * COLS * 3 + col * 3 + 1] / DIMM,
+																		image[PPM_HEADER_LENGHT + row * COLS * 3 + col * 3 + 2] / DIMM));
+		}
+	}
+	for (uint8_t col = 1; col < COLS; col += 2)
+	{
+		for (uint8_t row = 0; row < ROWS; row++)
+		{
+			led_matrix.setPixelColor((col + 1) * ROWS - row - 1, led_matrix.Color(image[PPM_HEADER_LENGHT + row * COLS * 3 + col * 3] / DIMM,
+																				  image[PPM_HEADER_LENGHT + row * COLS * 3 + col * 3 + 1] / DIMM,
+																				  image[PPM_HEADER_LENGHT + row * COLS * 3 + col * 3 + 2] / DIMM));
+		}
+	}
+	led_matrix.show();
+
+	return 0;
+}
diff --git a/Examples/Big_LED_strip/elsys.ppm b/Examples/Big_LED_strip/elsys.ppm
new file mode 100644
index 0000000000000000000000000000000000000000..f7381c3c46dc9dd116ec0c9d61c667a93fdd31a5
GIT binary patch
literal 780
zcmdUo%L#x$3`9Mr3T<I!#WJkU&aA`+42=5-QSszK32r_!Z<fi%($7|EweI6@Sa-^!
zypMsLw2xOdXk^@)Urn^!@|*m8!D>!+XQm=O8L=ZEC^ETfnczM~u@lnx#AHu{F-8dJ
SC)MjH8mOyY0!66*`~Lvx{Be8$

literal 0
HcmV?d00001

-- 
2.39.5