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fix bug #1354: I2C/TWI Library: Buffer Overflow

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Michael Vogt 2013-04-13 23:12:07 +02:00 committed by Martino Facchin
parent 6c861d8c70
commit 69a74b2095
1 changed files with 8 additions and 2 deletions
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10
libraries/Wire/src/utility/twi.c
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@ -509,8 +509,14 @@ ISR(TWI_vect)
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
// nack back at master // We replied a nack, this happens when the buffer overflows.
twi_reply(0); // After this interrupt we don't get a TW_SR_STOP interrupt, so
// clean up now
// Discard the data, it is incomplete
twi_rxBufferIndex = 0;
// ack future responses and leave slave receiver state
twi_releaseBus();
break; break;
// Slave Transmitter // Slave Transmitter