Ethernet library for STM32F4xx devices with built in ETH MAC - http://stm32f4-discovery.com/2015/02/library-52-ethernet-peripheral-on-stm32f4xx/. More...

Modules
	TM_ETHERNET_Macros
	Library defines.

	TM_ETHERNET_Typedefs
	Library Typedefs.

	TM_ETHERNET_Functions
	Library Functions.

Detailed Description

Ethernet library for STM32F4xx devices with built in ETH MAC - http://stm32f4-discovery.com/2015/02/library-52-ethernet-peripheral-on-stm32f4xx/.

Pinout

Library supports 2 modes of connecting and use:

MII: Media Independent Interface
RMII: Reduced Media Independent Interface

MII Connection

MII connection uses a lot of pins, but has slower (25MHz) reference clock.

It uses 4 data bytes and with 25MHz clock, you get 100Mbit connection.

To enable MII connection mode, open defines.h file and add define like below:

//Enable MII connection mode
#define ETHERNET_MII_MODE

ETH PHY     |STM32F4xx with ethernet

MDIO        |PA2
MDC         |PC1
REF_CLK     |PA1
CRS         |PH2
COL         |PH3
PPS_OUT     |PB5
RXD0        |PC4
RXD1        |PC5
RXD2        |PH6
RXD3        |PH7
RX_ERR      |PI10
RX_DV       |PA7
RX_CLK      |PC3
TX_EN       |PG11
TXD0        |PG13
TXD1        |PG14
TXD2        |PC2
TXD3        |PB8

RMII Connection

RMII connection uses a small number of pins, but has greater (50MHz) reference clock.

It uses 2 data bytes and with 50MHz clock, you get 100Mbit connection.

RMII mode is supported using 2 pinspacks. By default, PP1 (PinsPack 1) is used. If you want to use PP2, then you need define in defines.h file:

//Enable PinsPack 2 for RMII ethernet:
#define ETHERNET_RMII_PINSPACK_2

ETH PHY     |STM32F4xx with ethernet
            |PP1    |PP2
        
MDIO        |PA2    |PA2
MDC         |PC1    |PC1
REF_CLK     |PA1    |PA1
CRS         |PA7    |PA7
RXD0        |PC4    |PC4
RXD1        |PC5    |PC5
TX_EN       |PB11   |PG11
TXD0        |PB12   |PG13
TXD1        |PB13   |PG14

Also, PA8 pins HAVE TO be initialized as MCO alternate function, or communication will not work. Who knows why.

PA8 pin is also MCO output, which has ability to output different clocks.

I've added feature to output HSE crystal on this MCO pin. It can be used for 25MHz output if you have HSE 25MHz crystal and MII connection.

Then you don't need separate crystal for PHY device.

To enable MCO output HSE crystal value, open defines.h file and add define:

//Enable MCO output with HSE clock
#define ETHERNET_MCO_CLOCK

DHCP

Library supports DHCP to get IP from router. This feature is disabled by default To enable it, you need to add define in defines.h file:

//Enable DHCP 
#define ETHERNET_USE_DHCP

Supported PHY devices

This library supports more than just DP83848 PHY. Currently, supported list is below. The number which is near text means value you have to set ETHERNET_PHY define in case you want to select custom PHY.

0: DP83848
1: LAN8720A
2: KSZ8081RNA

If you want (for example) to use KSZ8081RNA PHY, you need to do this (defines.h):

//Use KSZ8081RNA PHY
#define ETHERNET_PHY   2

Changelog

 Version 1.1
  - March 18, 2015
  - Added support for MII connection
  - Tested on STM324x9-Eval board

 Version 1.0
  - First release

Dependencies

 - STM32F4xx
 - STM32F4xx RCC
 - STM32F4xx GPIO
 - STM32F4xx ETH
 - defines.h
 - attributes.h
 - LwIP stack
 - TM DELAY
 - TM GPIO

Modules

Detailed Description