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I2C: handling another master sending is part of slave mode. 

At least, avr-libc says so. Saves some 36 bytes in interrupt
context.
This commit is contained in:
Markus Hitter 2016-04-03 20:47:49 +02:00
parent e4067dc235
commit 3ced6aae4a
1 changed files with 3 additions and 3 deletions
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6
i2c.c
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@ -284,6 +284,9 @@ ISR(TWI_vect) {
TWCR = (1<<TWINT)|(I2C_MODE<<TWEA)|(0<<TWSTA)|(1<<TWSTO)|(1<<TWEN)|(1<<TWIE);
MACRO_I2C_MASTER;
break;
#ifdef I2C_SLAVE_MODE
case TW_SR_ARB_LOST_SLA_ACK:
case TW_SR_ARB_LOST_GCALL_ACK:
// Another master on the bus sent some bytes, receive them.
@ -293,9 +296,6 @@ ISR(TWI_vect) {
#ifdef I2C_EEPROM_SUPPORT
i2c_page_index = 0;
#endif
#ifdef I2C_SLAVE_MODE
case TW_SR_SLA_ACK:
case TW_SR_GCALL_ACK:
i2c_state |= I2C_MODE_BUSY; // Lock bus.