| Table of Contents |
|---|
Introduction
This page gives an overview of I2C-PS driver which is available as part of the Xilinx Vivado and SDK distribution.Source path for the driver:
https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/iicps
Driver source code is organized into different folders. Below diagram shows the iicps driver source organization
iicps
|
-- Doc - Provides the API and data structure details
|
- Examples - Reference application to show how to use the driver APIs and calling sequence
|
- Source - Driver source files
.
Driver Sources
The source code for the driver is included with the Vitis Unified Software Platform installation, as well as being available in the Xilinx Github repository.
Driver Name | Path in Vitis | Path in Github |
|---|---|---|
| iicps | <Vitis Install Directory>/data/embedded/XilinxProcessorIPLib/drivers/iicps | https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/iicps |
Note: To view the sources for a particular release, use the rel-version tag in github. For example, for the 2020.1 release, the proper version of the code is: https://github.com/Xilinx/embeddedsw/tree/xilinx-v2020.1/XilinxProcessorIPLib/drivers/iicps
The driver source code is organized into different folders. The table below shows the ospipsv driver source organization.
Directory | Description |
|---|---|
doc | Provides the API and data structure details |
data | Driver .tcl and .mdd file |
examples | Example applications that show how to use the driver features |
| src | Driver source files |
Driver Implementation
For a full list of features supported by this IP, please refer Chapter 69: I2C Controller in Versal TRM
Features
Supported:I2C bus specification version 2Supports 16-byte FIFO
Programmable normal and fast bus data rates
Master mode
Write transfer
Read transfer
Extended address support
Support HOLD for slow processor service
Supports TO interrupt flag to avoid stall condition
Slave monitor mode
Slave mode
Slave transmitter
Slave receiver
Extended address support (10-bit address)
Fully programmable slave response address
Supports HOLD to prevent overflow condition
Supports TO interrupt flag to avoid stall condition
Software can poll for status or function as interrupt-driven device
Programmable interrupt generation
Driver Supported Features
The iicps Standalone driver support the below things.All Controller Features supported.
Known issues and Limitations
Multi-master configuration works only if all the participating masters are operating at the same frequency.
Test cases
Refer below pah for testing different examples for each feature of the IP.
https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/iicps/examples
Example Applications
Refer to the driver examples directory for various example applications that exercise the different features of the driver. Each application is linked in the table below. The following sections describe the usage and expected output of the various applications. These example applications can be imported into the Vitis IDE from the Board Support Package settings tab.
Links to Examples
Examples path:
https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/iicps/examples
| Test name | Example source | Description |
|---|---|---|
| IICPS eeprom interrupt mode example | xiicps_eeprom_intr_example.c | This example does eeprom read/writes using interrupts. |
| IICPS eeprom polled mode example | xiicps_eeprom_polled_example.c | This example does eeprom read/writes using polling. |
| IICPS slave monitor mode example | xiicps_slave_monitor_example.c | This example does slave monitoring of an I2C slave device. |
Example Application Usage
IICPS eeprom interrupt mode example
This example does eeprom read/writes using interrupts.
Expected Output
| Code Block |
|---|
IIC EEPROM Interrupt Example Test
Page size 16
Successfully ran IIC EEPROM Interrupt Example Test |
ChangeLog
- 2016.3
- Removed interrupt logic from the eeprom polled example.
- Removed unused header files from the xiicps_eeprom_polled_example.
- 2016.4
- None
- 2017.1
- xiicps: Fixed compilation warnings
- iicps: Workaround for SLVMON issue in zynq
- iicps: Added readme.txt file to generate doxygen for examples
- 2017.2
- None
- 2017.3
- None
- 2017.4
- None
- 2018.1
- None
- 2018.2
- iicps: Write transfer size before slave address in xiicps_master.c
- iicps: Modified the Eeprom scanning mechanism in example xiicps_repeated_start_example.c
- iicps: Write transfer size before slave address in xiicps_master.c
- 2018.3
- None
- 2019.1
- iicps: Added arbitration lost support
- 2019.2
- None
- 2020.1
- Summary
- iicps: Add timeout event to slave interrupt handler
- iicps: Correct XIicPs_GetOptions function
- iicps: Re-organization of driver
- iicps: Add support for 10-bit address in Master/Slave.
- iicps: Clear the ISR before enabling interrupts.
- iicps: Add clocking support
- Commits:
- Summary
- 2020.2
- Summary
- iicps: Modified eeprom examples to detect page size
- Commits:
- Summary