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Fix to drop packets in Wire library (issue #335).

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This commit is contained in:
David A. Mellis
2010-09-16 01:22:36 +00:00
parent ea8a1182b8
commit 7392f8514d
1 changed files with 6 additions and 4 deletions
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10
libraries/Wire/utility/twi.c
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@ -413,12 +413,14 @@ SIGNAL(TWI_vect)
if(twi_rxBufferIndex < TWI_BUFFER_LENGTH){ if(twi_rxBufferIndex < TWI_BUFFER_LENGTH){
twi_rxBuffer[twi_rxBufferIndex] = '\0'; twi_rxBuffer[twi_rxBufferIndex] = '\0';
} }
// sends ack and stops interface for clock stretching
twi_stop();
// callback to user defined callback // callback to user defined callback
twi_onSlaveReceive(twi_rxBuffer, twi_rxBufferIndex); twi_onSlaveReceive(twi_rxBuffer, twi_rxBufferIndex);
// ack future responses // since we submit rx buffer to "wire" library, we can reset it
twi_reply(1); twi_rxBufferIndex = 0;
// leave slave receiver state // ack future responses and leave slave receiver state
twi_state = TWI_READY; twi_releaseBus();
break; break;
case TW_SR_DATA_NACK: // data received, returned nack case TW_SR_DATA_NACK: // data received, returned nack
case TW_SR_GCALL_DATA_NACK: // data received generally, returned nack case TW_SR_GCALL_DATA_NACK: // data received generally, returned nack