Easyi3C is a leading supplier of embedded system tools that simplify the development and debugging of various communication protocols. The company offers a range of products designed to help engineers and developers use I3C/I2C , USB and MIPI, JEDEC, MCTP and other protocols more efficiently.

10. Message Combined send (1):

Easyi3C API provides a message concept to allow user can control the bus freely. With this concept, users can combine any message and send them out by I2C or I3C protocol.  

Message A bus message is a segment of bus waveform start with START/REPEAT_START or end with REPEAT_START/STOP, 7-bit slave addressing, and combined format transactions. The figures below demonstrate it.

As the above figures, we support two types of messages: WriteMsg(), ReadMsg(). In each message type, there are 3 factors

1.           slave Address – The 7-bit Slave address

2.           data

a)           For a write message (RW_BIT = 0), the data shall be a byte list.

b)          For a read message (RW_BIT = 1), the data is an integer value indicating how many bytes will be read in.

3.           stop – Whether to generate a STOP condition after this message, it can be the following value:

a)           True - End with I2C/I3C STOP signal. 

b)          False – No action at the end.  Default value is True.

For debug I3C/I2C messages transfer, we add a special message: IdleMsg(),  IdleMsg() can add idle time between message transfer.

With many messages combined with a packet, Easyi3C provides the following APIs for packet operate:

1.           ez_send_i2c_msgs()

2.           ez_send_i3c_msgs()