rooty/Arduino
1
0
Fork 0
mirror of https://github.com/arduino/Arduino.git synced 2025-03-13 10:29:35 +01:00
Code Issues Releases Activity

release TWI bus right after stop or repeated start is condition

Browse Source 
this resolves timing issues seen in #1477
This commit is contained in:
Sandeep Mistry 2015-08-27 10:57:20 -04:00 committed by Cristian Maglie
parent 589b411be7
commit 48ff3a10ad
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
hardware/arduino/avr/libraries/Wire/utility/twi.c
View File

@ -476,6 +476,8 @@ ISR(TWI_vect)
}
break;
case TW_SR_STOP: // stop or repeated start condition received
// ack future responses and leave slave receiver state
twi_releaseBus();
// put a null char after data if there's room
if(twi_rxBufferIndex < TWI_BUFFER_LENGTH){
twi_rxBuffer[twi_rxBufferIndex] = '\0';
@ -484,8 +486,6 @@ ISR(TWI_vect)
twi_onSlaveReceive(twi_rxBuffer, twi_rxBufferIndex);
// since we submit rx buffer to "wire" library, we can reset it
twi_rxBufferIndex = 0;
// ack future responses and leave slave receiver state
twi_releaseBus();
break;
case TW_SR_DATA_NACK: // data received, returned nack
case TW_SR_GCALL_DATA_NACK: // data received generally, returned nack