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Update I2CManager_AVR.h

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Avoid loop in I2C_sendStart function.
This commit is contained in:
Neil McKechnie 2023-02-10 19:57:42 +00:00
parent c315895cd9
commit e498915b28
1 changed files with 4 additions and 9 deletions
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13
I2CManager_AVR.h
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@ -97,15 +97,10 @@ void I2CManagerClass::I2C_init()
void I2CManagerClass::I2C_sendStart() {
rxCount = 0;
txCount = 0;
#if defined(I2C_EXTENDED_ADDRESSXXXXXXXXXXXX)
if (currentRequest->i2cAddress.muxNumber() != I2CMux_None) {
// Send request to multiplexer
muxPhase = MuxPhase_PROLOG; // When start bit interrupt comes in, send SLA+W to MUX
} else
muxPhase = 0;
#endif
while(TWCR & (1<<TWSTO)) {} // Wait for any in-progress stop to finish
TWCR = (1<<TWEN)|ENABLE_TWI_INTERRUPT|(1<<TWINT)|(1<<TWEA)|(1<<TWSTA); // Send Start
// We may have already triggered a stop bit in the same run as this. To avoid
// clearing that bit before the stop bit has been sent, we can either wait for
// it to complete or we can OR the bit onto the existing bits.
TWCR |= (1<<TWEN)|ENABLE_TWI_INTERRUPT|(1<<TWINT)|(1<<TWEA)|(1<<TWSTA); // Send Start
}