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authorishtob <ishtob@gmail.com>2017-03-22 15:50:18 -0400
committerGitHub <noreply@github.com>2017-03-22 15:50:18 -0400
commitbb413383eecbeaf1174668415bd25ee4150963f5 (patch)
treebdacf1fbecf37b7a52a84e671a68ca1509990c1a
parent092416325b165ab0521fa746c91d393994b6c609 (diff)
Update i2c.c
-rw-r--r--keyboards/lets_split/i2c.c90
1 files changed, 0 insertions, 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