ESP32 Forum

Posted: **Tue May 31, 2022 6:36 am**

I have a custom board with a LAN8710AI-EZK-TR PHY where I have had a software running using ESP-IDF 4.1 with no issues. I'm using visualgdb.

Now I'm trying to upgrade to 4.4 and I have problems with getting ethernet to work. I have done what little refactoring is necessary and it still does not work.

So I'm going back to basics with the ethernet basic example and it does not work either. I have configured it for lan87xx and for ESP32 internal EMAC. I have no PHY reset so I have set that to -1 and my PHY address is 7, otherwise it's the default pinning and settings.

I get this output and it's more or less the same as in my own code:

I (12) boot: ESP-IDF v4.4.1-dirty 2nd stage bootloader (dirty due to me being forced to modify requrements.txt, I fulfil them, but i did not get it to work)
I (13) boot: compile time 15:20:40
I (13) boot: chip revision: 1
I (15) boot_comm: chip revision: 1, min. bootloader chip revision: 0
I (22) boot.esp32: SPI Speed : 40MHz
I (26) boot.esp32: SPI Mode : DIO
I (31) boot.esp32: SPI Flash Size : 2MB
I (36) boot: Enabling RNG early entropy source...
I (41) boot: Partition Table:
I (45) boot: ## Label Usage Type ST Offset Length
I (52) boot: 0 nvs WiFi data 01 02 00009000 00006000
I (59) boot: 1 phy_init RF data 01 01 0000f000 00001000
I (67) boot: 2 factory factory app 00 00 00010000 00100000
I (74) boot: End of partition table
I (78) boot_comm: chip revision: 1, min. application chip revision: 0
I (85) esp_image: segment 0: paddr=00010020 vaddr=3f400020 size=0f0e8h ( 61672) map
I (116) esp_image: segment 1: paddr=0001f110 vaddr=3ffb0000 size=00f08h ( 3848) load
I (118) esp_image: segment 2: paddr=00020020 vaddr=400d0020 size=30104h (196868) map
I (193) esp_image: segment 3: paddr=0005012c vaddr=3ffb0f08 size=014a4h ( 5284) load
I (196) esp_image: segment 4: paddr=000515d8 vaddr=40080000 size=0b9cch ( 47564) load
I (219) esp_image: segment 5: paddr=0005cfac vaddr=50000000 size=00010h ( 16) load
I (225) boot: Loaded app from partition at offset 0x10000
I (225) boot: Disabling RNG early entropy source...
I (239) cpu_start: Pro cpu up.
I (239) cpu_start: Starting app cpu, entry point is 0x400810c4
I (233) cpu_start: App cpu up.
I (253) cpu_start: Pro cpu start user code
I (253) cpu_start: cpu freq: 160000000
I (253) cpu_start: Application information:
I (258) cpu_start: Project name: ethernet_basic
I (263) cpu_start: App version: 1
I (268) cpu_start: Compile time: May 30 2022 15:20:03
I (274) cpu_start: ELF file SHA256: b77597766924dd17...
I (280) cpu_start: ESP-IDF: v4.4.1-dirty
I (286) heap_init: Initializing. RAM available for dynamic allocation:
I (293) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (299) heap_init: At 3FFB3BF0 len 0002C410 (177 KiB): DRAM
I (305) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (311) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (318) heap_init: At 4008B9CC len 00014634 (81 KiB): IRAM
I (325) spi_flash: detected chip: generic
I (329) spi_flash: flash io: dio
W (332) spi_flash: Detected size(4096k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (347) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (12) boot: ESP-IDF v4.4.1-dirty 2nd stage bootloader
I (13) boot: compile time 15:20:40
I (13) boot: chip revision: 1
I (15) boot_comm: chip revision: 1, min. bootloader chip revision: 0
I (22) boot.esp32: SPI Speed : 40MHz
I (26) boot.esp32: SPI Mode : DIO
I (31) boot.esp32: SPI Flash Size : 2MB
I (36) boot: Enabling RNG early entropy source...
I (41) boot: Partition Table:
I (45) boot: ## Label Usage Type ST Offset Length
I (52) boot: 0 nvs WiFi data 01 02 00009000 00006000
I (59) boot: 1 phy_init RF data 01 01 0000f000 00001000
I (67) boot: 2 factory factory app 00 00 00010000 00100000
I (74) boot: End of partition table
I (78) boot_comm: chip revision: 1, min. application chip revision: 0
I (85) esp_image: segment 0: paddr=00010020 vaddr=3f400020 size=0f0e8h ( 61672) map
I (116) esp_image: segment 1: paddr=0001f110 vaddr=3ffb0000 size=00f08h ( 3848) load
I (118) esp_image: segment 2: paddr=00020020 vaddr=400d0020 size=3010ch (196876) map
I (193) esp_image: segment 3: paddr=00050134 vaddr=3ffb0f08 size=014a4h ( 5284) load
I (196) esp_image: segment 4: paddr=000515e0 vaddr=40080000 size=0b9cch ( 47564) load
I (219) esp_image: segment 5: paddr=0005cfb4 vaddr=50000000 size=00010h ( 16) load
I (225) boot: Loaded app from partition at offset 0x10000
I (225) boot: Disabling RNG early entropy source...
I (239) cpu_start: Pro cpu up.
I (239) cpu_start: Starting app cpu, entry point is 0x400810c4
I (233) cpu_start: App cpu up.
I (253) cpu_start: Pro cpu start user code
I (253) cpu_start: cpu freq: 160000000
I (253) cpu_start: Application information:
I (258) cpu_start: Project name: ethernet_basic
I (263) cpu_start: App version: 1
I (268) cpu_start: Compile time: May 30 2022 15:20:03
I (274) cpu_start: ELF file SHA256: 0b0590df8e2bb201...
I (280) cpu_start: ESP-IDF: v4.4.1-dirty
I (286) heap_init: Initializing. RAM available for dynamic allocation:
I (293) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (299) heap_init: At 3FFB3BF0 len 0002C410 (177 KiB): DRAM
I (305) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (311) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (318) heap_init: At 4008B9CC len 00014634 (81 KiB): IRAM
I (325) spi_flash: detected chip: generic
I (329) spi_flash: flash io: dio
W (332) spi_flash: Detected size(4096k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (347) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
E (456) esp.emac: emac_esp32_init(349): reset timeout
E (456) esp_eth: esp_eth_driver_install(214): init mac failed
ESP_ERROR_CHECK failed: esp_err_t 0x107 (ESP_ERR_TIMEOUT) at 0x40085548
file: "../../../main/ethernet_example_main.c" line 122
func: app_main
expression: esp_eth_driver_install(&config, &eth_handle)

abort() was called at PC 0x4008554b on core 0
Setting breakpoint at 0x40081935 and returning...

Posted: **Tue May 31, 2022 8:23 am**

Could you please double check that RMII REF CLK is properly configured?

Posted: **Tue May 31, 2022 8:47 am**

I did find the same issue on the ESP32 Arduino forum : https://github.com/espressif/arduino-esp32/issues/5239

User Simonefardella posted an example sdkconfig file of the ethernet example where the problem was solved. https://github.com/espressif/arduino-es ... -854900942

By manually modifying my sdkconfig file and switching

Code: Select all

# CONFIG_ETH_RMII_CLK_OUTPUT is not set

to

Code: Select all

CONFIG_ETH_RMII_CLK_OUTPUT=y

it started to work.

I found no setting in visualgdb that fixed the issue.

Posted: **Tue May 31, 2022 9:49 am**

Great to hear you were able to make the Ethernet work!

Manually updating the sdkconfig file is possible however see below for more standard ways of how to configure RMII REF CLK:

1) idf.py menuconfig => Component config => Ethernet => Support ESP32 internal EMAC controller => RMII clock mode => Output RMII clock from internal, once you select Output RMII clock, you can also configure GPIO at which the clock is available.

2) Or you can do it from code:

Code: Select all

    eth_esp32_emac_config_t esp32_emac_config = ETH_ESP32_EMAC_DEFAULT_CONFIG();
    esp32_emac_config.clock_config.rmii.clock_mode = EMAC_CLK_OUT;
    esp32_emac_config.clock_config.rmii.clock_gpio = EMAC_CLK_OUT_180_GPIO; // or EMAC_APPL_CLK_OUT_GPIO, EMAC_CLK_OUT_GPIO

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