- #Tlv320aic32 audio loopback driver#
- #Tlv320aic32 audio loopback software#
- #Tlv320aic32 audio loopback code#
(Slaves can also have 10-bit addresses see the I2C specification for details.) The master Each device on an I2C bus has a unique 7-bit address to A STOP condition is when the clock line is HIGH and the data line goes from LOW to HIGH.Īfter the master issues a START condition, it sends a byte that indicates which slave device it wants toĬommunicate with. A START condition is when the clock line is HIGH and the data line goes from If the data line changes state while the clock line is HIGH, it is either a START condition or itsĬounterpart, a STOP condition. Normally, the data line is only allowed to change state while the clock They do this byĬausing a START condition on the bus. Only master devices can start a communication. WhenĬommunication is taking place, the bus is active. Most of the time the bus is idle, no communication is taking place, and both lines are HIGH. Under normal circumstances the master drives the clock line. When a master readsįrom a slave, the slave drives the data line when a master sends to a slave, the master drives the data line. The I2C bus is bidirectional: the SDA line is used both for transmitting and receiving data. This pulse on SCL clocks the SDA bit into the Line has settled, the SCL line is brought HIGH, then LOW. Level while SCL is LOW (a LOW on SDA indicates the bit is zero a HIGH indicates the bit is one). To send a bit on the I2C bus, the SDA line is driven to the appropriate All data is transmittedĪcross the I2C bus in groups of eight bits. Some I2C devices can act as masters or slaves, but the TLV320AIC32 can only act as a slaveĪn I2C bus consists of two lines, SDA and SCL. Both masters and slaves can read and write, but slaves can only do so under the direction of Communication on the I2C bus always takes place between two devices, one acting as the master and the otherĪcting as the slave.
#Tlv320aic32 audio loopback driver#
Two devices cannot conflict if two devices drive the bus simultaneously, there is no driver contention. Instead, the bus wiresĪre pulled HIGH by pull-up resistors, so the bus wires are HIGH when no device is driving them LOW. The bus lines LOW by connecting them to ground they never drive the bus lines HIGH. Open-drain interface supporting multiple devices and masters on a single bus. The TLV320AIC32 will respond to the I2C address of 0011000. For I2C fast mode, note that the minimum timing for each of tHD-STA, tSU-STA, and tSU-STO is 2.0 I2C CONTROL INTERFACE The TLV320AIC32 supports the I2C control protocol using 7-bit addressing and is capable of both standard andįast modes. h t t p s ://dl./u/38813887/I2C.xlsm Details of the DAC I2C inteface is shown below (taken from datasheet).
#Tlv320aic32 audio loopback code#
Can anyone help me to configure I2C1 to transmit data and I2C2 to receive data so that I can test it before connecting to the DAC ? Or point me in the direction where I can find some simpler or more relevant example code for this application ? Details of the I2C data that is sent to the DAC and the registers it configures can be found here. Im sure both of these examples are OTT for this application as from my understanding I only need to be able to transmit data to configure the DAC, not receive data.
#Tlv320aic32 audio loopback software#
I used the CE145_I2C_Slave example for the I2C2 slave module, but the software still only makes 3 attempts to transmit the I2C address. So I have tried to configure the I2C2 module as a slave device and connected the SDA and SCK lines for both master I2C1 and slave I2C2. For development, I initially want to configure the dsPIC I2C1 module to transmit data before I connect it to the DAC. But as I dont have a slave device connected to the the I2C bus, the software makes 3 attempts to transmit the I2C address and then stops, I assume this is because there is no slave to acknowledged the ACK bit . TLV320AIC32 The DAC will respond to the I2C address of 0011000 (0x30). I am trying to write an I2C driver to configure an external DAC i.e. Help configure I2C to transmit data to configure external DAC