vmisovic: code organization, drawing letters

source files moved to 'src' folder
program divided into multiple files
drawing letters

aleksav013: fixed vmisovic commits
moved functions from .h to .c file
renamed led_cube.c to main.c

9 files changed, 433 insertions, 0 deletions

diff --git a/src/config.h b/src/config.h
new file mode 100644
index 0000000..7f8bc9a
--- /dev/null
+++ b/src/config.h
@@ -0,0 +1,22 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+// configuration file
+
+// define pico gpio pins used for controlling 74HC595 chips
+#define DATA_PIN 2
+#define CLOCK_PIN 3
+#define LATCH_PIN 4
+#define LED_PIN 25
+
+// define the order of 74HC595 chain
+#define CHIP_0 0
+#define CHIP_1 8
+#define CHIP_2 6
+#define CHIP_3 4
+#define CHIP_4 2
+#define CHIP_5 1
+#define CHIP_6 3
+#define CHIP_7 5
+#define CHIP_8 7
+
+#endif
diff --git a/src/draw.c b/src/draw.c
new file mode 100644
index 0000000..a927e9c
--- /dev/null
+++ b/src/draw.c
@@ -0,0 +1,52 @@
+#include "draw.h"
+#include "config.h"
+#include <string.h>
+
+void send_raw_data(uint8_t data[9])
+{
+	gpio_put(LATCH_PIN, 0);
+	for (size_t i = 0; i < 9; i++) {
+		for (size_t j = 0; j < 8; j++)
+		{
+			gpio_put(DATA_PIN, data[map[i]] & (1 << j));
+			gpio_put(CLOCK_PIN, 0);
+			gpio_put(CLOCK_PIN, 1);
+		}
+	}
+	gpio_put(LATCH_PIN, 1);
+}
+
+void send_data(uint8_t floor, uint64_t on_floor)
+{
+	uint8_t data[9];
+	data[0] = floor;
+	memcpy(&data[1], &on_floor, 8);
+	send_raw_data(data);
+}
+
+void cube_set_led(uint64_t data[8], uint8_t x, uint8_t y, uint8_t z, bool value)
+{
+	uint64_t mask = 1LL << (y * 8 + x);
+	if (value != (bool)(data[z] & mask))
+		data[z] ^= mask;
+}
+
+int64_t zero_byte(alarm_id_t id, void* user_data)
+{
+	memset(user_data, 0, 1);
+	return 0;
+}
+
+void draw(uint64_t data[8], uint32_t time)
+{
+	volatile uint8_t ind = 1;
+	add_alarm_in_ms(time, (void*)zero_byte, (void*)&ind, false);
+
+	while (ind) {
+		for (size_t i = 0; i < 8; i++) {
+			send_data((1 << i), data[i]);
+			sleep_ms(1);
+		}
+		tight_loop_contents();
+	}
+}
diff --git a/src/draw.h b/src/draw.h
new file mode 100644
index 0000000..097da77
--- /dev/null
+++ b/src/draw.h
@@ -0,0 +1,15 @@
+#ifndef DRAW_H
+#define DRAW_H
+// library used for manipulating and displaying cube matrix
+
+#include "pico/stdlib.h"
+
+extern uint8_t map[9]; // map[] is defined in init.h
+
+void send_raw_data(uint8_t data[9]);
+void send_data(uint8_t floor, uint64_t on_floor);
+void cube_set_led(uint64_t data[8], uint8_t x, uint8_t y, uint8_t z, bool value);
+int64_t zero_byte(alarm_id_t id, void* user_data);
+void draw(uint64_t data[8], uint32_t time);
+
+#endif
diff --git a/src/font.h b/src/font.h
new file mode 100644
index 0000000..598ce07
--- /dev/null
+++ b/src/font.h
@@ -0,0 +1,156 @@
+#ifndef FONT_H
+#define FONT_H
+/**
+ * 8x8 monochrome bitmap fonts for rendering
+ * Author: Daniel Hepper <daniel@hepper.net>
+ *
+ * License: Public Domain
+ *
+ * Based on:
+ * // Summary: font8x8.h
+ * // 8x8 monochrome bitmap fonts for rendering
+ * //
+ * // Author:
+ * //     Marcel Sondaar
+ * //     International Business Machines (public domain VGA fonts)
+ * //
+ * // License:
+ * //     Public Domain
+ *
+ * Fetched from: http://dimensionalrift.homelinux.net/combuster/mos3/?p=viewsource&file=/modules/gfx/font8_8.asm
+ **/
+
+// Constant: font8x8_basic
+// Contains an 8x8 font map for unicode points U+0000 - U+007F (basic latin)
+const char font8x8_basic[128][8] = {
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0000 (nul)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0001
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0002
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0003
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0004
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0005
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0006
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0007
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0008
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0009
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000A
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000B
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000C
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000D
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000E
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+000F
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0010
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0011
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0012
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0013
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0014
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0015
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0016
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0017
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0018
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0019
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001A
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001B
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001C
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001D
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001E
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+001F
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0020 (space)
+    { 0x18, 0x3C, 0x3C, 0x18, 0x18, 0x00, 0x18, 0x00},   // U+0021 (!)
+    { 0x36, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0022 (")
+    { 0x36, 0x36, 0x7F, 0x36, 0x7F, 0x36, 0x36, 0x00},   // U+0023 (#)
+    { 0x0C, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x0C, 0x00},   // U+0024 ($)
+    { 0x00, 0x63, 0x33, 0x18, 0x0C, 0x66, 0x63, 0x00},   // U+0025 (%)
+    { 0x1C, 0x36, 0x1C, 0x6E, 0x3B, 0x33, 0x6E, 0x00},   // U+0026 (&)
+    { 0x06, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0027 (')
+    { 0x18, 0x0C, 0x06, 0x06, 0x06, 0x0C, 0x18, 0x00},   // U+0028 (()
+    { 0x06, 0x0C, 0x18, 0x18, 0x18, 0x0C, 0x06, 0x00},   // U+0029 ())
+    { 0x00, 0x66, 0x3C, 0xFF, 0x3C, 0x66, 0x00, 0x00},   // U+002A (*)
+    { 0x00, 0x0C, 0x0C, 0x3F, 0x0C, 0x0C, 0x00, 0x00},   // U+002B (+)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x06},   // U+002C (,)
+    { 0x00, 0x00, 0x00, 0x3F, 0x00, 0x00, 0x00, 0x00},   // U+002D (-)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x00},   // U+002E (.)
+    { 0x60, 0x30, 0x18, 0x0C, 0x06, 0x03, 0x01, 0x00},   // U+002F (/)
+    { 0x3E, 0x63, 0x73, 0x7B, 0x6F, 0x67, 0x3E, 0x00},   // U+0030 (0)
+    { 0x0C, 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x3F, 0x00},   // U+0031 (1)
+    { 0x1E, 0x33, 0x30, 0x1C, 0x06, 0x33, 0x3F, 0x00},   // U+0032 (2)
+    { 0x1E, 0x33, 0x30, 0x1C, 0x30, 0x33, 0x1E, 0x00},   // U+0033 (3)
+    { 0x38, 0x3C, 0x36, 0x33, 0x7F, 0x30, 0x78, 0x00},   // U+0034 (4)
+    { 0x3F, 0x03, 0x1F, 0x30, 0x30, 0x33, 0x1E, 0x00},   // U+0035 (5)
+    { 0x1C, 0x06, 0x03, 0x1F, 0x33, 0x33, 0x1E, 0x00},   // U+0036 (6)
+    { 0x3F, 0x33, 0x30, 0x18, 0x0C, 0x0C, 0x0C, 0x00},   // U+0037 (7)
+    { 0x1E, 0x33, 0x33, 0x1E, 0x33, 0x33, 0x1E, 0x00},   // U+0038 (8)
+    { 0x1E, 0x33, 0x33, 0x3E, 0x30, 0x18, 0x0E, 0x00},   // U+0039 (9)
+    { 0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x00},   // U+003A (:)
+    { 0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x06},   // U+003B (;)
+    { 0x18, 0x0C, 0x06, 0x03, 0x06, 0x0C, 0x18, 0x00},   // U+003C (<)
+    { 0x00, 0x00, 0x3F, 0x00, 0x00, 0x3F, 0x00, 0x00},   // U+003D (=)
+    { 0x06, 0x0C, 0x18, 0x30, 0x18, 0x0C, 0x06, 0x00},   // U+003E (>)
+    { 0x1E, 0x33, 0x30, 0x18, 0x0C, 0x00, 0x0C, 0x00},   // U+003F (?)
+    { 0x3E, 0x63, 0x7B, 0x7B, 0x7B, 0x03, 0x1E, 0x00},   // U+0040 (@)
+    { 0x0C, 0x1E, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x00},   // U+0041 (A)
+    { 0x3F, 0x66, 0x66, 0x3E, 0x66, 0x66, 0x3F, 0x00},   // U+0042 (B)
+    { 0x3C, 0x66, 0x03, 0x03, 0x03, 0x66, 0x3C, 0x00},   // U+0043 (C)
+    { 0x1F, 0x36, 0x66, 0x66, 0x66, 0x36, 0x1F, 0x00},   // U+0044 (D)
+    { 0x7F, 0x46, 0x16, 0x1E, 0x16, 0x46, 0x7F, 0x00},   // U+0045 (E)
+    { 0x7F, 0x46, 0x16, 0x1E, 0x16, 0x06, 0x0F, 0x00},   // U+0046 (F)
+    { 0x3C, 0x66, 0x03, 0x03, 0x73, 0x66, 0x7C, 0x00},   // U+0047 (G)
+    { 0x33, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x33, 0x00},   // U+0048 (H)
+    { 0x1E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00},   // U+0049 (I)
+    { 0x78, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E, 0x00},   // U+004A (J)
+    { 0x67, 0x66, 0x36, 0x1E, 0x36, 0x66, 0x67, 0x00},   // U+004B (K)
+    { 0x0F, 0x06, 0x06, 0x06, 0x46, 0x66, 0x7F, 0x00},   // U+004C (L)
+    { 0x63, 0x77, 0x7F, 0x7F, 0x6B, 0x63, 0x63, 0x00},   // U+004D (M)
+    { 0x63, 0x67, 0x6F, 0x7B, 0x73, 0x63, 0x63, 0x00},   // U+004E (N)
+    { 0x1C, 0x36, 0x63, 0x63, 0x63, 0x36, 0x1C, 0x00},   // U+004F (O)
+    { 0x3F, 0x66, 0x66, 0x3E, 0x06, 0x06, 0x0F, 0x00},   // U+0050 (P)
+    { 0x1E, 0x33, 0x33, 0x33, 0x3B, 0x1E, 0x38, 0x00},   // U+0051 (Q)
+    { 0x3F, 0x66, 0x66, 0x3E, 0x36, 0x66, 0x67, 0x00},   // U+0052 (R)
+    { 0x1E, 0x33, 0x07, 0x0E, 0x38, 0x33, 0x1E, 0x00},   // U+0053 (S)
+    { 0x3F, 0x2D, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00},   // U+0054 (T)
+    { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x3F, 0x00},   // U+0055 (U)
+    { 0x33, 0x33, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00},   // U+0056 (V)
+    { 0x63, 0x63, 0x63, 0x6B, 0x7F, 0x77, 0x63, 0x00},   // U+0057 (W)
+    { 0x63, 0x63, 0x36, 0x1C, 0x1C, 0x36, 0x63, 0x00},   // U+0058 (X)
+    { 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x0C, 0x1E, 0x00},   // U+0059 (Y)
+    { 0x7F, 0x63, 0x31, 0x18, 0x4C, 0x66, 0x7F, 0x00},   // U+005A (Z)
+    { 0x1E, 0x06, 0x06, 0x06, 0x06, 0x06, 0x1E, 0x00},   // U+005B ([)
+    { 0x03, 0x06, 0x0C, 0x18, 0x30, 0x60, 0x40, 0x00},   // U+005C (\)
+    { 0x1E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1E, 0x00},   // U+005D (])
+    { 0x08, 0x1C, 0x36, 0x63, 0x00, 0x00, 0x00, 0x00},   // U+005E (^)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF},   // U+005F (_)
+    { 0x0C, 0x0C, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+0060 (`)
+    { 0x00, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x6E, 0x00},   // U+0061 (a)
+    { 0x07, 0x06, 0x06, 0x3E, 0x66, 0x66, 0x3B, 0x00},   // U+0062 (b)
+    { 0x00, 0x00, 0x1E, 0x33, 0x03, 0x33, 0x1E, 0x00},   // U+0063 (c)
+    { 0x38, 0x30, 0x30, 0x3e, 0x33, 0x33, 0x6E, 0x00},   // U+0064 (d)
+    { 0x00, 0x00, 0x1E, 0x33, 0x3f, 0x03, 0x1E, 0x00},   // U+0065 (e)
+    { 0x1C, 0x36, 0x06, 0x0f, 0x06, 0x06, 0x0F, 0x00},   // U+0066 (f)
+    { 0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x1F},   // U+0067 (g)
+    { 0x07, 0x06, 0x36, 0x6E, 0x66, 0x66, 0x67, 0x00},   // U+0068 (h)
+    { 0x0C, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00},   // U+0069 (i)
+    { 0x30, 0x00, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E},   // U+006A (j)
+    { 0x07, 0x06, 0x66, 0x36, 0x1E, 0x36, 0x67, 0x00},   // U+006B (k)
+    { 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00},   // U+006C (l)
+    { 0x00, 0x00, 0x33, 0x7F, 0x7F, 0x6B, 0x63, 0x00},   // U+006D (m)
+    { 0x00, 0x00, 0x1F, 0x33, 0x33, 0x33, 0x33, 0x00},   // U+006E (n)
+    { 0x00, 0x00, 0x1E, 0x33, 0x33, 0x33, 0x1E, 0x00},   // U+006F (o)
+    { 0x00, 0x00, 0x3B, 0x66, 0x66, 0x3E, 0x06, 0x0F},   // U+0070 (p)
+    { 0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x78},   // U+0071 (q)
+    { 0x00, 0x00, 0x3B, 0x6E, 0x66, 0x06, 0x0F, 0x00},   // U+0072 (r)
+    { 0x00, 0x00, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x00},   // U+0073 (s)
+    { 0x08, 0x0C, 0x3E, 0x0C, 0x0C, 0x2C, 0x18, 0x00},   // U+0074 (t)
+    { 0x00, 0x00, 0x33, 0x33, 0x33, 0x33, 0x6E, 0x00},   // U+0075 (u)
+    { 0x00, 0x00, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00},   // U+0076 (v)
+    { 0x00, 0x00, 0x63, 0x6B, 0x7F, 0x7F, 0x36, 0x00},   // U+0077 (w)
+    { 0x00, 0x00, 0x63, 0x36, 0x1C, 0x36, 0x63, 0x00},   // U+0078 (x)
+    { 0x00, 0x00, 0x33, 0x33, 0x33, 0x3E, 0x30, 0x1F},   // U+0079 (y)
+    { 0x00, 0x00, 0x3F, 0x19, 0x0C, 0x26, 0x3F, 0x00},   // U+007A (z)
+    { 0x38, 0x0C, 0x0C, 0x07, 0x0C, 0x0C, 0x38, 0x00},   // U+007B ({)
+    { 0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00},   // U+007C (|)
+    { 0x07, 0x0C, 0x0C, 0x38, 0x0C, 0x0C, 0x07, 0x00},   // U+007D (})
+    { 0x6E, 0x3B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},   // U+007E (~)
+    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}    // U+007F
+};
+
+#endif
diff --git a/src/init.c b/src/init.c
new file mode 100644
index 0000000..a9f5d63
--- /dev/null
+++ b/src/init.c
@@ -0,0 +1,32 @@
+#include "pico/stdlib.h"
+#include "config.h"
+#include "init.h"
+
+uint8_t map[9];
+
+void init_pins(void)
+{
+	gpio_init(DATA_PIN);
+	gpio_init(CLOCK_PIN);
+	gpio_init(LATCH_PIN);
+	gpio_set_dir(DATA_PIN, GPIO_OUT);
+	gpio_set_dir(CLOCK_PIN, GPIO_OUT);
+	gpio_set_dir(LATCH_PIN, GPIO_OUT);
+
+	gpio_init(LED_PIN);
+	gpio_set_dir(LED_PIN, GPIO_OUT);
+	gpio_put(LED_PIN, 1);
+}
+
+void init_map(void)
+{
+	map[0] = CHIP_0;
+	map[1] = CHIP_1;
+	map[2] = CHIP_2;
+	map[3] = CHIP_3;
+	map[4] = CHIP_4;
+	map[5] = CHIP_5;
+	map[6] = CHIP_6;
+	map[7] = CHIP_7;
+	map[8] = CHIP_8;
+}
diff --git a/src/init.h b/src/init.h
new file mode 100644
index 0000000..8dabbdb
--- /dev/null
+++ b/src/init.h
@@ -0,0 +1,11 @@
+#ifndef INIT_H
+#define INIT_H
+
+#include <stdint.h>
+
+extern uint8_t map[9];
+
+void init_pins(void);
+void init_map(void);
+
+#endif
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..86c5a95
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,74 @@
+#include "pico/stdlib.h"
+#include "hardware/timer.h"
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "config.h"
+#include "init.h"
+#include "draw.h"
+#include "tests.h"
+#include "font.h"
+
+void draw_letter(char c)
+{
+	uint8_t data[9];
+	data[0] = 1;
+	memcpy(&data[1], &font8x8_basic[c], 8);
+	send_raw_data(data);
+	sleep_ms(1000);
+}
+
+void draw_letter2(char c)
+{
+	uint64_t data[8];
+	for(int i = 0; i<8; i++) {
+		data[i] = 0LL;
+		for(int j = 0; j<8; j++) {
+			cube_set_led(data, 0, j, i, (font8x8_basic[c][i] >> j) & 1);
+		}
+	}
+	draw(data, 1000);
+}
+
+int main()
+{
+	stdio_init_all();
+	init_pins();
+	init_map();
+	//test_every_pin();
+
+	uint64_t data[8];
+	while(1) {
+		//test_every_floor();
+		//test_sphere();
+		/*for (int i = 0; i < 8; i++)
+			data[i] = 0LL;
+		draw_letter2('x');
+		for (int x = 0; x < 8; x++) {
+			cube_set_led(data, x, 0, 0, 1);
+			draw(data, 100);
+		}
+		draw_letter2('y');
+		for (int y = 0; y < 8; y++) {
+			cube_set_led(data, 0, y, 0, 1);
+			draw(data, 100);
+		}
+		draw_letter2('z');
+		for (int z = 0; z < 8; z++) {
+			cube_set_led(data, 0, 0, z, 1);
+			draw(data, 100);
+		}
+		for (int i = 32; i<128; i++) {
+			//draw_letter(i);
+			draw_letter2(i);
+		}*/
+		const char *tekst = "Aki kad ces kocku da zavrsavas?";
+		for (int i = 0; tekst[i]!='\0'; i++)
+			draw_letter2(tekst[i]);
+	}
+
+	return 0;
+}
diff --git a/src/tests.c b/src/tests.c
new file mode 100644
index 0000000..8f77acc
--- /dev/null
+++ b/src/tests.c
@@ -0,0 +1,59 @@
+#include "tests.h"
+#include <string.h>
+
+void test_every_floor(void)
+{
+	for (size_t i = 0; i < 8; i++) {
+		send_data((1 << i), 0xFFFFFFFFFFFFFFFF);
+		sleep_ms(125);
+	}
+}
+
+void test_every_pin(void)
+{
+	uint64_t data[8];
+	memset(data, 0, 64);
+
+	for (size_t x = 0; x < 8; x++) {
+		for (size_t y = 0; y < 8; y++) {
+			for (size_t z = 0; z < 8; z++) {
+				cube_set_led(data, x, y, z, 1);
+			}
+			draw(data, 125);
+			for (size_t z = 0; z < 8; z++) {
+				data[z] = 0;
+			}
+		}
+	}
+}
+
+void test_sphere(void)
+{
+	uint64_t data[8];
+
+	for (size_t r = 0; r < 7; r++) {
+		memset(data, 0, 64);
+		for (int8_t x = 0; x < 8; x++) {
+			for (int8_t y = 0; y < 8; y++) {
+				for (int8_t z = 0; z < 8; z++) {
+					if ((3.5-x)*(3.5-x) + (3.5-y)*(3.5-y) + (3.5-z)*(3.5-z) <= (float)r*r) {
+						cube_set_led(data, x, y, z, 1);
+					}
+				}
+			}
+		}
+		draw(data, 500);
+	}
+}
+
+void test_letter(uint64_t letter)
+{
+	uint64_t data[8];
+	for (size_t i = 0; i < 8; i++) {
+		if(i<2)
+			data[i] = letter;
+		else
+			data[i] = 0LL;
+	}
+	draw(data, 2000);
+}
diff --git a/src/tests.h b/src/tests.h
new file mode 100644
index 0000000..aa2726b
--- /dev/null
+++ b/src/tests.h
@@ -0,0 +1,12 @@
+#ifndef TESTS_H
+#define TESTS_H
+// all animations or tests are defined here
+
+#include "draw.h"
+
+void test_every_floor(void);
+void test_every_pin(void);
+void test_sphere(void);
+void test_letter(uint64_t letter);
+
+#endif