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DISCO_H747I modifications for Ethernet

Table of Contents

  1. DISCO_H747I Ethernet modifications
  2. 1) Hardware:
  3. 2) Software:

DISCO_H747I Ethernet modifications

By default, all necessary DISCO_H747I MCU pins for ethernet are not connected ethernet controller (but instead are used for audio use cases). Consequently following modifications are requitred in order to use ethernet on DISCO_H747I:

1) Hardware:

Modify solder bridges and resistor as below (for details, refer to STM32H747I-DISCO board user manual https://www.st.com/resource/en/user_manual/dm00504240.pdf):

  • SB21, SB45 and R87 should be opened
  • SB22, SB44, SB17 and SB8 should be closed

2) Software:

Create (or update) file 'mbed_app.json':

mbed_app.json

{
    "target_overrides": {
        "DISCO_H747I": {
            "target.network-default-interface-type": "ETHERNET",
            "target.macros_add": [
                "DISCO_H747I_ETHERNET_SOLDERBRIGE"
            ],
            "target.device_has_add": [
                "EMAC"
            ]
        }
    }
}

/media/uploads/ABOSTM/disco_h747i_ethernet_modification_1.jpg /media/uploads/ABOSTM/disco_h747i_ethernet_modification_2.jpg

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