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I2C slave: enable matching any configured slave address #1801

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Merged
merged 3 commits into from
Aug 30, 2022
Merged

I2C slave: enable matching any configured slave address #1801

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38fecfb
Enable multi slave address handling
deltaford Aug 13, 2022
a8a23df
Optimize & Enable handling of multiple I2C slave addresses.
deltaford Aug 26, 2022
49c17d0
Fixed indentation error
deltaford Aug 26, 2022
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30 changes: 14 additions & 16 deletions libraries/Wire/src/utility/twi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1074,24 +1074,22 @@ void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, ui
obj->slaveRxNbData = 0;
}

if (AddrMatchCode == hi2c->Init.OwnAddress1) {
if (TransferDirection == I2C_DIRECTION_RECEIVE) {
obj->slaveMode = SLAVE_MODE_TRANSMIT;
if (TransferDirection == I2C_DIRECTION_RECEIVE) {
obj->slaveMode = SLAVE_MODE_TRANSMIT;

if (obj->i2c_onSlaveTransmit != NULL) {
obj->i2cTxRxBufferSize = 0;
obj->i2c_onSlaveTransmit(obj);
}
HAL_I2C_Slave_Seq_Transmit_IT(hi2c, (uint8_t *) obj->i2cTxRxBuffer,
obj->i2cTxRxBufferSize, I2C_LAST_FRAME);
} else {
obj->slaveRxNbData = 0;
obj->slaveMode = SLAVE_MODE_RECEIVE;
/* We don't know in advance how many bytes will be sent by master so
* we'll fetch one by one until master ends the sequence */
HAL_I2C_Slave_Seq_Receive_IT(hi2c, (uint8_t *) & (obj->i2cTxRxBuffer[obj->slaveRxNbData]),
1, I2C_NEXT_FRAME);
if (obj->i2c_onSlaveTransmit != NULL) {
obj->i2cTxRxBufferSize = 0;
obj->i2c_onSlaveTransmit(obj);
}
HAL_I2C_Slave_Seq_Transmit_IT(hi2c, (uint8_t *) obj->i2cTxRxBuffer,
obj->i2cTxRxBufferSize, I2C_LAST_FRAME);
} else {
obj->slaveRxNbData = 0;
obj->slaveMode = SLAVE_MODE_RECEIVE;
/* We don't know in advance how many bytes will be sent by master so
* we'll fetch one by one until master ends the sequence */
HAL_I2C_Slave_Seq_Receive_IT(hi2c, (uint8_t *) & (obj->i2cTxRxBuffer[obj->slaveRxNbData]),
1, I2C_NEXT_FRAME);
}
}

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