Posted on May 26, 2017 at 13:25 Hello Imen,
I am trying to do SMBus communication between STM32L4 and STM32F103.
I have HAL drivers for L4 and Std_Peripheral_Lib for F1.
I have configured F1 as master and L4 as slave and F1 is sending one byte to L4.
F1 send data snippet:
I2C_GenerateSTART(SMBUS_PORT, ENABLE);
while ((!I2C_CheckEvent(SMBUS_PORT, I2C_EVENT_MASTER_MODE_SELECT)) && Timeout-- > 0);
I2C_Send7bitAddress(SMBUS_PORT, Device_Address, I2C_Direction_Transmitter);
Timeout = MAX_TIMEOUT;
while ((!I2C_CheckEvent(SMBUS_PORT, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) && Timeout-- > 0);
for (Index = 0; Index < Size; Index++)
{
I2C_SendData(SMBUS_PORT, TxBuffer[Index]);
Timeout = MAX_TIMEOUT;
while ((!I2C_CheckEvent(SMBUS_PORT, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) && Timeout-- > 0);
}
I2C_GenerateSTOP(SMBUS_PORT, ENABLE);
L4 code snippet:
In main loop i have called HAL_SMBUS_EnableListen_IT(&SMBus_Handle) just before while loop and rest is handled in interrupts.
void HAL_SMBUS_AddrCallback(SMBUS_HandleTypeDef *hsmbus, uint8_t TransferDirection, uint16_t AddrMatchCode)
{
AddrMatchCode = AddrMatchCode << 1;
if(AddrMatchCode == (uint16_t)SLAVE_DEVICE_ADDRESS)
{
if(TransferDirection == 0)
{
HAL_SMBUS_Slave_Receive_IT(hsmbus, Rx_Data, 1, SMBUS_AUTOEND_MODE);
}
else
{
HAL_SMBUS_Slave_Transmit_IT(&SMBus_Handle,Tx_Data,2,SMBUS_FIRST_AND_LAST_FRAME_NO_PEC);
}
}
}
I could debug for address and its fine but now able to receive the data sent by master. Tried with 2 bytes too.
Everything is done as simple I2C handshake.
Let me know if something is wrong with this code.
Regards,
Nikhil
