fixed issue 2 and 3

arduino_examples/1_LED_test/1_LED_test.ino

@@ -16,10 +16,11 @@ exixe my_tube = exixe(cs_pin);
 
 void setup()
 {
-  my_tube.set_led(127, 0, 127); // purple
+  my_tube.spi_init();
 }
 
 void loop()
 {
-
+  my_tube.set_led(127, 0, 127); // purple
+  delay(500);
 }

arduino_examples/2_loop_digit_simple/2_loop_digit_simple.ino

@@ -18,8 +18,8 @@ exixe my_tube = exixe(cs_pin);
 
 void setup()
 {
+  my_tube.spi_init();
   my_tube.clear();
-  my_tube.set_led(127, 0, 127); // purple
 }
 
 void loop()
@@ -30,6 +30,7 @@ void loop()
 	2nd arg: Digit brightness, 0 to 127
 	3rd arg: Overdrive, 0 disable 1 enable
   */
+  my_tube.set_led(127, 0, 127); // purple
   my_tube.show_digit(count, 127, 0);
   delay(500);
 }

arduino_examples/3_loop_digit_crossfade/3_loop_digit_crossfade.ino

@@ -17,8 +17,8 @@ exixe my_tube = exixe(cs_pin);
 
 void setup()
 {
+  my_tube.spi_init();
   my_tube.clear();
-  my_tube.set_led(32, 127, 127); // purple
 }
 
 void loop()
@@ -40,5 +40,7 @@ void loop()
   // check its return value to see if the animation is finished
   while(my_tube.crossfade_run() == EXIXE_ANIMATION_IN_PROGRESS)
     ;
+
+  my_tube.set_led(127, 64, 0); // orange
   delay(250);
 }

arduino_examples/4_multiple_tubes_simple/4_multiple_tubes_simple.ino

@@ -8,7 +8,6 @@
   Demo 4: Loop digits on two tubes
 */
 
-
 #include "exixe.h"
 
 // change those to the cs pins you're using
@@ -21,16 +20,20 @@ exixe my_tube2 = exixe(cs2);
 
 void setup()
 {
+  // ONLY CALL THIS ONCE
+  my_tube1.spi_init();
+
   my_tube1.clear();
   my_tube2.clear();
-  my_tube1.set_led(127, 0, 127); // purple;
-  my_tube2.set_led(127, 127, 0); // yellow;
 }
 
 void loop()
 {
   count = (count + 1) % 10; // keep count between 0 to 9
   my_tube1.show_digit(count, 127, 0);
   my_tube2.show_digit(10 - count, 127, 0);
+
+  my_tube1.set_led(127, 0, 127); // purple;
+  my_tube2.set_led(127, 127, 0); // yellow;
   delay(500);
 }

arduino_examples/5_multiple_tubes_crossfade/5_multiple_tubes_crossfade.ino

@@ -8,7 +8,6 @@
   Demo 5: Loop digits on two tubes with crossfade animation
 */
 
-
 #include "exixe.h"
 
 // change those to the cs pins you're using
@@ -21,10 +20,11 @@ exixe my_tube2 = exixe(cs2);
 
 void setup()
 {
+  // ONLY CALL THIS ONCE
+  my_tube1.spi_init();
+
   my_tube1.clear();
   my_tube2.clear();
-  my_tube1.set_led(127, 0, 127); // purple;
-  my_tube2.set_led(127, 127, 0); // yellow;
 }
 
 void loop()
@@ -49,5 +49,7 @@ void loop()
       break;
   }
 
+  my_tube1.set_led(127, 0, 127); // purple;
+  my_tube2.set_led(127, 127, 0); // yellow;
   delay(250);
 }

arduino_library/README.md

@@ -16,6 +16,10 @@ Select the `exixe.zip` you just downloaded, and it should install automatically.
 
 A number of examples are [provided here](../arduino_examples). Take a look at the [getting started guide](../getting_started.md) to see how to use them.
 
+#### `spi_init()`
+
+* Initializes SPI peripheral, only call this once(even if you use multiple tubes) at the beginning of the sketch.
+
 #### `show_digit(uint8_t digit, uint8_t brightness, uint8_t overdrive)`
 
 * This sets `digit` in the tube to `brightness`.

arduino_library/exixe/examples/1_LED_test/1_LED_test.ino

@@ -16,10 +16,11 @@ exixe my_tube = exixe(cs_pin);
 
 void setup()
 {
-  my_tube.set_led(127, 0, 127); // purple
+  my_tube.spi_init();
 }
 
 void loop()
 {
-
+  my_tube.set_led(127, 0, 127); // purple
+  delay(500);
 }

arduino_library/exixe/examples/2_loop_digit_simple/2_loop_digit_simple.ino

@@ -18,8 +18,8 @@ exixe my_tube = exixe(cs_pin);
 
 void setup()
 {
+  my_tube.spi_init();
   my_tube.clear();
-  my_tube.set_led(127, 0, 127); // purple
 }
 
 void loop()
@@ -30,6 +30,7 @@ void loop()
 	2nd arg: Digit brightness, 0 to 127
 	3rd arg: Overdrive, 0 disable 1 enable
   */
+  my_tube.set_led(127, 0, 127); // purple
   my_tube.show_digit(count, 127, 0);
   delay(500);
 }

arduino_library/exixe/examples/3_loop_digit_crossfade/3_loop_digit_crossfade.ino

@@ -17,8 +17,8 @@ exixe my_tube = exixe(cs_pin);
 
 void setup()
 {
+  my_tube.spi_init();
   my_tube.clear();
-  my_tube.set_led(127, 0, 127); // purple
 }
 
 void loop()
@@ -40,5 +40,7 @@ void loop()
   // check its return value to see if the animation is finished
   while(my_tube.crossfade_run() == EXIXE_ANIMATION_IN_PROGRESS)
     ;
+
+  my_tube.set_led(127, 64, 0); // orange
   delay(250);
 }

arduino_library/exixe/examples/4_multiple_tubes_simple/4_multiple_tubes_simple.ino

@@ -8,7 +8,6 @@
   Demo 4: Loop digits on two tubes
 */
 
-
 #include "exixe.h"
 
 // change those to the cs pins you're using
@@ -21,16 +20,20 @@ exixe my_tube2 = exixe(cs2);
 
 void setup()
 {
+  // ONLY CALL THIS ONCE
+  my_tube1.spi_init();
+
   my_tube1.clear();
   my_tube2.clear();
-  my_tube1.set_led(127, 0, 127); // purple;
-  my_tube2.set_led(127, 127, 0); // yellow;
 }
 
 void loop()
 {
   count = (count + 1) % 10; // keep count between 0 to 9
   my_tube1.show_digit(count, 127, 0);
   my_tube2.show_digit(10 - count, 127, 0);
+
+  my_tube1.set_led(127, 0, 127); // purple;
+  my_tube2.set_led(127, 127, 0); // yellow;
   delay(500);
 }

arduino_library/exixe/examples/5_multiple_tubes_crossfade/5_multiple_tubes_crossfade.ino

@@ -8,7 +8,6 @@
   Demo 5: Loop digits on two tubes with crossfade animation
 */
 
-
 #include "exixe.h"
 
 // change those to the cs pins you're using
@@ -21,10 +20,11 @@ exixe my_tube2 = exixe(cs2);
 
 void setup()
 {
+  // ONLY CALL THIS ONCE
+  my_tube1.spi_init();
+
   my_tube1.clear();
   my_tube2.clear();
-  my_tube1.set_led(127, 0, 127); // purple;
-  my_tube2.set_led(127, 127, 0); // yellow;
 }
 
 void loop()
@@ -49,5 +49,7 @@ void loop()
       break;
   }
 
+  my_tube1.set_led(127, 0, 127); // purple;
+  my_tube2.set_led(127, 127, 0); // yellow;
   delay(250);
 }

arduino_library/exixe/examples/barebone/0_LED_test/0_LED_test.ino

@@ -0,0 +1,44 @@
+/*
+  Demo for exixe modules
+  https://github.com/dekuNukem/exixe
+  
+  exixe "Getting Started" guide
+  https://github.com/dekuNukem/exixe/blob/master/getting_started.md
+
+  Demo 0: Show a purple LED
+*/
+
+#include <SPI.h>
+#define SPI_BUF_SIZE 16
+
+uint8_t spi_buf[SPI_BUF_SIZE];
+// change this to the cs pin you're using
+const int slaveSelectPin = 10;
+
+void setup()
+{
+  pinMode(slaveSelectPin, OUTPUT);
+  digitalWrite(slaveSelectPin, HIGH);
+
+  SPI.begin();
+  // 8MHz SCLK, MSB first, SPI mode 0
+  SPI.beginTransaction(SPISettings(8000000, MSBFIRST, SPI_MODE0));
+
+  spi_buf[0] = 0xaa; // first byte, header
+  spi_buf[13] = 0x80 | 127; // red LED full brightness
+  spi_buf[14] = 0x80 | 0; // green LED off
+  spi_buf[15] = 0x80 | 127; // blue LED full brightness
+}
+
+void loop()
+{
+  // cs low
+  digitalWrite(slaveSelectPin, LOW);
+  // send 16 byte command
+  for (int i = 0; i < SPI_BUF_SIZE; ++i)
+    SPI.transfer(spi_buf[i]);
+  // cs high
+  digitalWrite(slaveSelectPin, HIGH);
+
+  delay(200);
+}

arduino_library/exixe/examples/barebone/1_show4/1_show4.ino

@@ -0,0 +1,45 @@
+/*
+  Demo for exixe modules
+  https://github.com/dekuNukem/exixe
+  
+  exixe "Getting Started" guide
+  https://github.com/dekuNukem/exixe/blob/master/getting_started.md
+
+  Demo 1: Show digit 4 with orange backlight
+*/
+
+#include <SPI.h>
+#define SPI_BUF_SIZE 16
+
+uint8_t spi_buf[SPI_BUF_SIZE];
+// change this to the cs pin you're using
+const int slaveSelectPin = 10;
+
+void setup()
+{
+  pinMode(slaveSelectPin, OUTPUT);
+  digitalWrite(slaveSelectPin, HIGH);
+
+  SPI.begin();
+  // 8MHz SCLK, MSB first, SPI mode 0
+  SPI.beginTransaction(SPISettings(8000000, MSBFIRST, SPI_MODE0));
+
+  spi_buf[0] = 0xaa; // first byte, header
+  spi_buf[4] = 0x80 | 127; // digit 4 full brightness
+  spi_buf[13] = 0x80 | 127; // red LED full brightness
+  spi_buf[14] = 0x80 | 28; // green LED brightness 28
+  spi_buf[15] = 0x80 | 0; // blue LED fully off
+}
+
+void loop()
+{
+  // cs low
+  digitalWrite(slaveSelectPin, LOW);
+  // send 16 byte command
+  for (int i = 0; i < SPI_BUF_SIZE; ++i)
+    SPI.transfer(spi_buf[i]);
+  // cs high
+  digitalWrite(slaveSelectPin, HIGH);
+
+  delay(200);
+}

arduino_library/exixe/exixe.cpp

@@ -15,9 +15,13 @@ exixe::exixe(int my_cs)
   memset(spi_buf, 0, EXIXE_SPI_BUF_SIZE);
   pinMode(cs_pin, OUTPUT);
   digitalWrite(cs_pin, HIGH);
+  animation_src_digit = 0;
+}
+
+void exixe::spi_init()
+{
   SPI.begin();
   SPI.beginTransaction(SPISettings(8000000, MSBFIRST, SPI_MODE0));
-  show_digit(0, 0, 0);
 }
 
 void exixe::spi_write()

arduino_library/exixe/exixe.h

@@ -1,6 +1,8 @@
 #ifndef exixe_h
 #define exixe_h
 
+#include "Arduino.h"
+
 #define EXIXE_SPI_BUF_SIZE (16)
 #define EXIXE_SPI_HEADER (0xaa)
 #define EXIXE_SPI_HEADER_OD (0xab)
@@ -12,6 +14,7 @@ class exixe
 {
   public:
     exixe(int my_cs);
+    void spi_init();
     void show_digit(unsigned char digit, unsigned char brightness, unsigned char overdrive);
     void set_led(unsigned char red, unsigned char green, unsigned char blue);
     void set_dots(unsigned char left_brightness, unsigned char right_brightness);