ergodox qwerty_code_friendly: add macro keys (#1918)

[qmk_firmware.git] / keyboards / lets_split / i2c.c

diff --git a/keyboards/lets_split/i2c.c b/keyboards/lets_split/i2c.c
index 038f37a4be71428c0f0248bb22a94cb93c143ab0..084c890c405fa6f7ebfc1be7a699e3d120e5c482 100644 (file)
--- a/keyboards/lets_split/i2c.c
+++ b/keyboards/lets_split/i2c.c
@@ -48,7 +48,7 @@ void i2c_master_init(void) {
 // returns: 0 => success
 //          1 => error
 uint8_t i2c_master_start(uint8_t address) {
-  TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
+  TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTA);
 
   i2c_delay();
 
@@ -56,7 +56,6 @@ uint8_t i2c_master_start(uint8_t address) {
   if ( (TW_STATUS != TW_START) && (TW_STATUS != TW_REP_START))
     return 1;
 
-  // send device address
   TWDR = address;
   TWCR = (1<<TWINT) | (1<<TWEN);
 
@@ -160,95 +159,4 @@ ISR(TWI_vect) {
   // Reset everything, so we are ready for the next TWI interrupt
   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