1 files changed, 19 insertions, 1 deletions

diff --git a/keyboards/lets_split/i2c.h b/keyboards/lets_split/i2c.h
index 08ce4b009..c15b6bc50 100644
--- a/keyboards/lets_split/i2c.h
+++ b/keyboards/lets_split/i2c.h
@@ -16,7 +16,7 @@
 #define SLAVE_BUFFER_SIZE 0x10
 
 // i2c SCL clock frequency
-#define SCL_CLOCK  100000L
+#define SCL_CLOCK  400000L
 
 extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
 
@@ -28,4 +28,22 @@ uint8_t i2c_master_read(int);
 void i2c_reset_state(void);
 void i2c_slave_init(uint8_t address);
 
+
+static inline unsigned char i2c_start_read(unsigned char addr) {
+  return i2c_master_start((addr << 1) | I2C_READ);
+}
+
+static inline unsigned char i2c_start_write(unsigned char addr) {
+  return i2c_master_start((addr << 1) | I2C_WRITE);
+}
+
+// from SSD1306 scrips
+extern unsigned char i2c_rep_start(unsigned char addr);
+extern void i2c_start_wait(unsigned char addr);
+extern unsigned char i2c_readAck(void);
+extern unsigned char i2c_readNak(void);
+extern unsigned char i2c_read(unsigned char ack);
+
+#define i2c_read(ack)  (ack) ? i2c_readAck() : i2c_readNak();
+
 #endif