move DATA_SIZE to global

controller/controller.c

@@ -16,7 +16,6 @@
 
 #define IIC_DEVICE "/dev/i2c-7"
 #define BUFFER_BLOCKS 128
-#define BUFFER_DATA_SIZE 8
 
 #define HEADING_SIM_UP "sim/autopilot/heading_up"
 #define HEADING_SIM_DOWN "sim/autopilot/heading_down"
@@ -31,7 +30,7 @@ struct ringBuffer i2cDataRead;
 struct ringBuffer i2cDataWrite;
 
 struct blockData {
-  char data[BUFFER_DATA_SIZE];
+  char data[DATA_SIZE];
   int triggerBit;
 };
 

controller/global.h

@@ -8,3 +8,4 @@
 #define TRIGGER_BIT_2 4
 #define HIGH_BIT_2 8
 #define I2C_ADDRESS_START 0x08
+#define DATA_SIZE 8

rotator/README.md

@@ -2,6 +2,11 @@
 * two rotators
 * two displays
 
+## required libraries
+* https://github.com/adafruit/Adafruit_SSD1306/
+* https://github.com/adafruit/Adafruit-GFX-Library
+* https://github.com/adafruit/Adafruit_BusIO
+
 ## PINs
 * IDE = Physical = Usage
 * x = 1 = reset (connecto to master)

rotator/rotator.ino

@@ -51,6 +51,11 @@ uint8_t lastClk = HIGH;
 byte valueBuffer[VALUE_BUFFER] = { 0 };
 uint8_t readerPos, writerPos = 0;
 
+// ringbuffer of display data
+struct {
+  
+}
+
 void addValue(uint8_t value) {
   valueBuffer[writerPos++] = value;