while using ethernet in esp32 wrover I module
in between in the running network suddenly i get the below given error
emac_dm9051: no mem for receive buffer
what does that mean? how do i handle the scenario ?
have set the below macro range
ETH_MAX_PAYLOAD_LEN 1500
and the rx tx buffer sizes are as given below
CONFIG_ETH_DMA_RX_BUFFER_NUM=5
CONFIG_ETH_DMA_TX_BUFFER_NUM=5
kindly let me know the route cause that can generate the error
emac_dm9051: no mem for receive buffer
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Re: emac_dm9051: no mem for receive buffer
What ESP-IDF version do you use?
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Re: emac_dm9051: no mem for receive buffer
esp-idf 4.2 I am using.
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- Posts: 207
- Joined: Fri May 07, 2021 10:35 am
Re: emac_dm9051: no mem for receive buffer
This issue happens when your application consumes a lot of memory and if Ethernet messages are received with short interval. The size of packet doesn't matter since the driver always allocates 1500B. The driver was optimized in ESP-IDF v5.0 and above. I recently backported the optimization to v4.3 and v4.4 (see https://github.com/espressif/esp-idf/co ... cf549f76be). It will be present in next official release.
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