---
title: "Wiznet_stm8"
url: "https://maker.wiznet.io/mayuri/projects/wiznet-stm8/"
markdown_url: "https://maker.wiznet.io/mayuri/projects/wiznet-stm8/md"
type: "UCC: User Created Content"
author: "MichaelTien8901"
author_url: "https://github.com/MichaelTien8901/Wiznet_stm8"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "MichaelTien8901"
original_url: "https://github.com/MichaelTien8901/Wiznet_stm8"
published: "2022-12-29"
language: "en"
hardware: ["WIZnet WIZ550io"]
likes: 3
views: 517
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Wiznet_stm8

> STM8 with WIZ550io This project add STM8 with WIZ550io for Ethernet connection.

Original author: MichaelTien8901 (source: https://github.com/MichaelTien8901/Wiznet_stm8)

## Components

- **WIZnet WIZ550io** x 1 ([docs](https://docs.wiznet.io/Product/ioModule/wiz550io))

## Article

## Wiznet_stm8

STM8 with WIZ550io This project add STM8 with WIZ550io for Ethernet connection.

## Hardware

STM8S Discovery board and WIZ550io. An optional RS232 adapter is used for debugging purpose.

## Referred Project

The main program and settings of SPI is from [this project using STM32 to connect WIZ500](http://www.carminenoviello.com/2015/08/28/adding-ethernet-connectivity-stm32-nucleo/)

## C compiler

Use the free version of COSMIC C compiler for STM8.

## IO Library

The IO libray used is from <https://github.com/Wiznet/ioLibrary_Driver>

Some changes are necessary because of name conflicts.

## Tests

### Test 1 Basic Socket

Use telnet to connect to defined IP and port. In this example, connect to 192.168.1.192 port 5000. The telnet client will receive a message and port closed.

### Test 2 TCP Server

### Test 3 TCP Client

### Test 4 Ping Client

For porting to other MCU, Ping.c need define Endian correctly for the function htons. STM8 is Big Endian, so nothing is needed to do. For STM32, ATMEGA, you will need to define LITTLE_ENDIAN.

## PINs Used

STM8S Discovery Board, switch power to 3.3V(JP1 to 1)

| Signal | STM8 | CPU Pin | WIZNET | DISCOVERY BOARD |
| --- | --- | --- | --- | --- |
| SPI-SCK | PC5 | 30 | J1-5 | CN2-6 |
| SPI-MISO | PC7 | 34 | J1-4 | CN2-10 |
| SPI_MOSI | PC6 | 33 | J1-3 | CN2-9 |
| SCSn | PG1 | 36 | J1-6 | CN2-12 |
| WIZNET_RESET | PG0 | 35 | J2-3 | CN2-11 |
| INTn(*not Used) | PC4 | 29 | J2-5 | CN2-5 |
| GND |  |  | J1-1, J1-2, J2-6 | CN2-7 |
| 3V3 |  |  | J1-7,J1-8,J2-1 | CN2-8,CN1-7 |

STM8S207C8 Board used for private project.

| Signal | STM8 | CPU Pin | WIZNET | IC-PIN |
| --- | --- | --- | --- | --- |
| SPI-SCK | PC5 | 30 | J1-5 | U5-5 |
| SPI-MISO | PC7 | 34 | J1-4 | U5-13 |
| SPI_MOSI | PC6 | 33 | J1-3 | U4-5 |
| SCSn | PE5 | 25 | J1-6 | U5-4* |
| WIZNET_RESET | PE7 | 23 | J2-3 | U4-11 |
| INTn | PC4 | 29 | J2-5 | U4-3 |
| GND |  |  | J1-1, J1-2, J2-6 | U4-7, U5-7 |
| 3V3 |  |  | J1-7,J1-8,J2-1 |  |
| 5V |  |  |  | U4-14,U5-14 |

- SSR connect to H. U5-3 if SSR connect to L

---

Source: https://maker.wiznet.io/mayuri/projects/wiznet-stm8/