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I2C Read/Write example


(C) COPYRIGHT 2015 WIZnet Co.,Ltd.

  • file : I2C/I2C_Init/readme.md
  • author : IOP Team
  • version : V1.0.0
  • date : 1-May-2015
  • brief : Description of the I2C Data Read/Write example.

THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS A RESULT, WIZNET SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.


Example Description#

This example provides a description of how to use a Read/Write operation. This example provides the elementary steps to control the following modules and use them in an application:


Directory contents#

  • I2C/I2C_Init/main.c (Main program)
  • I2C/I2C_Init/W7500x_it.c (Interrupt Handlers)
  • I2C/I2C_Init/W7500x_it.h (Interrupt Handlers Header file)
  • I2C/I2C_Init/W7500x_conf.h (Library Configuration file)
  • I2C/I2C_Init/MDK/W7500x_I2C_Init.uvproj (Project file)
  • I2C/I2C_Init/GCC/Makefile (GCC Make file)

Hardware and Software environment#

| --W7500-- ---slave-- | | | | | | SDA |------| SDA | | SCL |------| SCL | | | | | | | | |

--------- -----------

How to use it ?#

In order to make the program work, you must do the following :

  • Open your preferred toolchain.
  • Rebuild all files and load your image into target memory.
  • Run the example.
  • WIZwiki W7500 where the Flash memory density ranges 128Kbytes.
  • If you have any questions, please use the forum site.

Flow Chart#

  • Master Init
  • Device address send from W7500 to EEPROM
  • START enable
  • Confirm the Ack Receive
  • Slave address send from W7500 to EEPROM
  • Confirm the Ack Receive
  • Send the data from W7500 to EEPROM
  • Restart enable
  • Confirm the Ack Receive
  • Receive the data
  • Transmit the Ack transmission
  • STOP enable

ยฉ COPYRIGHT 2015 WIZnet Co.,Ltd.