diff options
Diffstat (limited to 'libraries/Wire/utility/twi.c')
| -rw-r--r-- | libraries/Wire/utility/twi.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/libraries/Wire/utility/twi.c b/libraries/Wire/utility/twi.c index 201d7d1..b436e69 100644 --- a/libraries/Wire/utility/twi.c +++ b/libraries/Wire/utility/twi.c @@ -91,6 +91,22 @@ void twi_init(void) } /* + * Function twi_disable + * Desc disables twi pins + * Input none + * Output none + */ +void twi_disable(void) +{ + // disable twi module, acks, and twi interrupt + TWCR &= ~(_BV(TWEN) | _BV(TWIE) | _BV(TWEA)); + + // deactivate internal pullups for twi. + digitalWrite(SDA, 0); + digitalWrite(SCL, 0); +} + +/* * Function twi_slaveInit * Desc sets slave address and enables interrupt * Input none @@ -464,8 +480,6 @@ ISR(TWI_vect) if(twi_rxBufferIndex < TWI_BUFFER_LENGTH){ twi_rxBuffer[twi_rxBufferIndex] = '\0'; } - // sends ack and stops interface for clock stretching - twi_stop(); // callback to user defined callback twi_onSlaveReceive(twi_rxBuffer, twi_rxBufferIndex); // since we submit rx buffer to "wire" library, we can reset it |