Refactor use of legacy i2c implementation (#14341)

1 files changed, 0 insertions, 207 deletions

diff --git a/keyboards/sx60/twimaster.c b/keyboards/sx60/twimaster.c
deleted file mode 100644
index 30d8c24bf0..0000000000
--- a/keyboards/sx60/twimaster.c
+++ /dev/null
@@ -1,207 +0,0 @@
-/*************************************************************************
-* Title:    I2C master library using hardware TWI interface
-* Author:   Peter Fleury <pfleury@gmx.ch>  http://jump.to/fleury
-* File:     $Id: twimaster.c,v 1.3 2005/07/02 11:14:21 Peter Exp $
-* Software: AVR-GCC 3.4.3 / avr-libc 1.2.3
-* Target:   any AVR device with hardware TWI
-* Usage:    API compatible with I2C Software Library i2cmaster.h
-**************************************************************************/
-#include <inttypes.h>
-#include <compat/twi.h>
-
-#include <i2cmaster.h>
-
-/* define CPU frequency in Hz here if not defined in Makefile */
-#ifndef F_CPU
-#define F_CPU 16000000UL
-#endif
-
-/* I2C clock in Hz */
-#define SCL_CLOCK  400000L
-
-
-/*************************************************************************
- Initialization of the I2C bus interface. Need to be called only once
-*************************************************************************/
-void i2c_init(void)
-{
-  /* initialize TWI clock
-   * minimal values in Bit Rate Register (TWBR) and minimal Prescaler
-   * bits in the TWI Status Register should give us maximal possible
-   * I2C bus speed - about 444 kHz
-   *
-   * for more details, see 20.5.2 in ATmega16/32 secification
-   */
-
-  TWSR = 0;     /* no prescaler */
-  TWBR = 10;    /* must be >= 10 for stable operation */
-
-}/* i2c_init */
-
-
-/*************************************************************************
-  Issues a start condition and sends address and transfer direction.
-  return 0 = device accessible, 1= failed to access device
-*************************************************************************/
-unsigned char i2c_start(unsigned char address)
-{
-    uint8_t   twst;
-
-  /* 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)) return 1;
-
-  /* send device address */
-  TWDR = address;
-  TWCR = (1<<TWINT) | (1<<TWEN);
-
-  /* wail until transmission completed and ACK/NACK has been received */
-  while(!(TWCR & (1<<TWINT)));
-
-  /* check value of TWI Status Register. Mask prescaler bits. */
-  twst = TW_STATUS & 0xF8;
-  if ( (twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK) ) return 1;
-
-  return 0;
-
-}/* i2c_start */
-
-
-/*************************************************************************
- Issues a start condition and sends address and transfer direction.
- If device is busy, use ack polling to wait until device is ready
-
- Input:   address and transfer direction of I2C device
-*************************************************************************/
-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;
-      }
-      
-      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_start( address );
-
-}/* i2c_rep_start */
-
-
-/*************************************************************************
- Terminates the data transfer and releases the I2C bus
-*************************************************************************/
-void i2c_stop(void)
-{
-  /* send stop condition */
-  TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
-
-  /* wait until stop condition is executed and bus released */
-  while(TWCR & (1<<TWSTO));
-
-}/* i2c_stop */
-
-
-/*************************************************************************
-  Send one byte to I2C device
-
-  Input:    byte to be transfered
-  Return:   0 write successful
-            1 write failed
-*************************************************************************/
-unsigned char i2c_write( unsigned char data )
-{
-    uint8_t   twst;
-
-  /* send data to the previously addressed device */
-  TWDR = data;
-  TWCR = (1<<TWINT) | (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_MT_DATA_ACK) return 1;
-  return 0;
-
-}/* i2c_write */
-
-
-/*************************************************************************
- 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 */