IBASE IBD185 - Manual (Page 15)

IBD185 User Guide 15
I2C Bus Initialize
Initialize the I2C bus master on MCU.
Start up an I2C bus with specific Bus ID and Speed.
The Bus ID can be 1 or 2.
Bus ID is 1 means the I2C1 on MCU, and so on.
The Speed can be 0, 1, 2.
Speed=0 means de-initialize the I2C Bus.
Speed=1 means initialize the specific I2C Bus in 400Kbps.
Speed=2 means initialize the specific I2C Bus in 100Kbps (default).
Sub Command Request
Sub
Command
Length
Sub Command
Code
Sub Command
Data
size of the
I2cApiBusInit
structure
I2CAPI_BUS_INIT I2cApiBusInit structure
Sub Command Reply
Sub
Command
Length
Sub Command
Code
Sub Command
Data
size of the
I2cApiBusInit
structure +1
I2CAPI_BUS_INIT I2cApiBusInit structure followed by
one byte I2cApiResult
The reply packet contains the parameters that device received and
followed by one byte of result.
I2cApiResult = 0 means the execution result is fail.
I2cApiBusInit Structure
Field Type Description
Bus ID byte Designate which I2C bus on MCU
1 – 1st I2C bus master
2 – 2nd I2C bus master
Bus Speed byte I2C bus speed selection
0: De-Initialize the specific I2C bus
1: 400Kbps
2: 100Kbps (default)