Keyboard: add ergoinu keyboard (#3655)

* add ergoinu

* remove unnecessary code

* replace include guard
delete unused code

* remove unused RGBLED defines

1 files changed, 24 insertions, 0 deletions

diff --git a/keyboards/ergoinu/serial.h b/keyboards/ergoinu/serial.h
new file mode 100644
index 000000000..67cf06ac6
--- /dev/null
+++ b/keyboards/ergoinu/serial.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <stdbool.h>
+
+// ////////////////////////////////////////////
+// Need Soft Serial defines in serial_config.h
+// ////////////////////////////////////////////
+// ex.
+//  #define SERIAL_PIN_DDR DDRD
+//  #define SERIAL_PIN_PORT PORTD
+//  #define SERIAL_PIN_INPUT PIND
+//  #define SERIAL_PIN_MASK _BV(PD?)   ?=0,2
+//  #define SERIAL_PIN_INTERRUPT INT?_vect  ?=0,2
+//  #define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
+//  #define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
+
+// Buffers for master - slave communication
+extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
+extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
+
+void serial_master_init(void);
+void serial_slave_init(void);
+int serial_update_buffers(void);
+bool serial_slave_data_corrupt(void);