From bb413383eecbeaf1174668415bd25ee4150963f5 Mon Sep 17 00:00:00 2001
From: ishtob <ishtob@gmail.com>
Date: Wed, 22 Mar 2017 15:50:18 -0400
Subject: [PATCH] Update i2c.c

---
 keyboards/lets_split/i2c.c | 90 --------------------------------------
 1 file changed, 90 deletions(-)

diff --git a/keyboards/lets_split/i2c.c b/keyboards/lets_split/i2c.c
index 755038f5e2..fbf2f3b767 100644
--- a/keyboards/lets_split/i2c.c
+++ b/keyboards/lets_split/i2c.c
@@ -161,94 +161,4 @@ ISR(TWI_vect) {
   TWCR |= (1<<TWIE) | (1<<TWINT) | (ack<<TWEA) | (1<<TWEN);
 }
 
-// from SSD1306
-/*
-void i2c_start_wait(unsigned char address)
-{
-    uint8_t   twst;
-
-
-    while ( 1 )
-    {
-      // send START condition
-      TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
-
-      // wait until transmission completed
-      while(!(TWCR & (1<<TWINT)));
-
-      // check value of TWI Status Register. Mask prescaler bits.
-      twst = TW_STATUS & 0xF8;
-      if ( (twst != TW_START) && (twst != TW_REP_START)) continue;
-
-      // send device address
-      TWDR = address;
-      TWCR = (1<<TWINT) | (1<<TWEN);
-
-      // wail until transmission completed
-      while(!(TWCR & (1<<TWINT)));
-
-      // check value of TWI Status Register. Mask prescaler bits.
-      twst = TW_STATUS & 0xF8;
-      if ( (twst == TW_MT_SLA_NACK )||(twst ==TW_MR_DATA_NACK) )
-      {
-          // device busy, send stop condition to terminate write operation
-          TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
-
-          // wait until stop condition is executed and bus released
-          while(TWCR & (1<<TWSTO));
-
-          continue;
-      }
-      //if( twst != TW_MT_SLA_ACK) return 1;
-      break;
-     }
-
-}// i2c_start_wait
-*/
-/*************************************************************************
- Issues a repeated start condition and sends address and transfer direction
-
- Input:   address and transfer direction of I2C device
-
- Return:  0 device accessible
-          1 failed to access device
-*************************************************************************/
-/*
-unsigned char i2c_rep_start(unsigned char address)
-{
-    return i2c_master_start( address );
-
-}/* i2c_rep_start */
-/*************************************************************************
- Read one byte from the I2C device, request more data from device
-
- Return:  byte read from I2C device
-*************************************************************************/
-/*
-unsigned char i2c_readAck(void)
-{
-  TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA);
-  while(!(TWCR & (1<<TWINT)));
-
-  return TWDR;
-
-}/* i2c_readAck */
-
-
-/*************************************************************************
- Read one byte from the I2C device, read is followed by a stop condition
-
- Return:  byte read from I2C device
-*************************************************************************
-unsigned char i2c_readNak(void)
-{
-  TWCR = (1<<TWINT) | (1<<TWEN);
-  while(!(TWCR & (1<<TWINT)));
-
-  return TWDR;
-
-}/* i2c_readNak */
-
-
-
 #endif