1 files changed, 50 insertions, 0 deletions
diff --git a/keyboards/ergotaco/ergotaco.h b/keyboards/ergotaco/ergotaco.h
new file mode 100644
index 000000000..6bc5ce36f
--- /dev/null
+++ b/keyboards/ergotaco/ergotaco.h
@@ -0,0 +1,50 @@
+#pragma once
+#include <util/delay.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "quantum.h"
+#include "i2c_master.h"
+#include "matrix.h"
+
+
+extern i2c_status_t mcp23018_status;
+#define ERGODOX_EZ_I2C_TIMEOUT 1000
+#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
+#define CPU_16MHz       0x00
+
+// I2C aliases and register addresses (see "mcp23018.md")
+//#define I2C_ADDR        0b0100000
+#define I2C_ADDR        0x20
+#define I2C_ADDR_WRITE  ( (I2C_ADDR<<1) | I2C_WRITE )
+#define I2C_ADDR_READ   ( (I2C_ADDR<<1) | I2C_READ  )
+#define IODIRA          0x00            // i/o direction register
+#define IODIRB          0x01
+#define GPPUA           0x0C            // GPIO pull-up resistor register
+#define GPPUB           0x0D
+#define GPIOA           0x12            // general purpose i/o port register (write modifies OLAT)
+#define GPIOB           0x13
+#define OLATA           0x14            // output latch register
+#define OLATB           0x15
+
+void init_ergodox(void);
+uint8_t init_mcp23018(void);
+
+/*  ---------- LEFT HAND -----------   ---------- RIGHT HAND ---------- */
+#define LAYOUT(                                                          \
+    L00,L01,L02,L03,L04,L05,                   R00,R01,R02,R03,R04,R05)  \
+                                                                         \
+   /* matrix positions */                                                \
+    {			\
+    {R00},     \
+    {R01},     \
+    {R02},     \
+    {R03},     \
+    {R04},     \
+    {R05},     \
+    {L05},     \
+    {L04},     \
+    {L03},     \
+    {L02},     \
+    {L01},     \
+    {L00},     \
+}