Hi,
I am working TM4c1292NCPDT microcontroller using TIVA drivers libraries.
I2c master communicating with temperature sensor ,The temperature sensor have the conversation time about 8ms. If i press RESET in the conversation time(8ms) of temperature sensor and after reset if master tries to communicate with temp sensor it gives a arbitration lost error .How can i handle this type of error from master side
If i press RESET in the conversation time(8ms) of temperature sensor and after reset if master tries to communicate with temp sensor it gives a arbitration lost error
Is this RESET a reset to the MCU or to the temp sensor or to both? Please clarify.
If the RESET is not going to both the MCU and the temp sensor then after reset these master and slave pair will go out of sync. Bear in mind, neither one of them knows that the other side was reset in the middle if the reset only goes to one of them individually.
libraries.
Looking at the waveform, it seems that the reset is applied while the master is still owning the bus. As you can see the SCL clock is still low when you apply the reset. If this reset is a controlled reset then I will suggest you first force the master to IDLE state before you apply the reset. In IDLE state, the SCL will be high.
If the prior transaction is completed successfully the master will move its its state machine to the IDLE state and release the bus. This is normally the case when you issue I2C_MASTER_CMD_SINGLE_SEND or I2C_MASTER_CMD_BURST_SEND_FINISH. If you are in the middle of a burst transaction like I2C_MASTER_CMD_BURST_SEND_START or 2C_MASTER_CMD_BURST_SEND_CONT, the SCL bus will remain low. If you have an error, you can use 2C_MASTER_CMD_BURST_SEND_ERROR_STOP to force a STOP on the master side.
This app note will be helpful. https://www.ti.com/lit/pdf/spma073
