ESP32 Forum

WiFive wrote:I don't think internal clock is supported by Ethernet driver yet

PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO16_U, FUNC_GPIO16_EMAC_CLK_OUT);

colman wrote:Are their any reference schematic or document that use the RMII to interface to 10/100 Ethernet Transceiver?

Regards,
Colman

void eth_gpio_config_rmii(void)
{
//txd0 to gpio19 ,can not change
PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO19_U, FUNC_GPIO19_EMAC_TXD0);
//tx_en to gpio21 ,can not change
PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO21_U, FUNC_GPIO21_EMAC_TX_EN);
//txd1 to gpio22 , can not change
PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO22_U, FUNC_GPIO22_EMAC_TXD1);
//rxd0 to gpio25 , can not change
gpio_set_direction(25, GPIO_MODE_INPUT);
//rxd1 to gpio26 ,can not change
gpio_set_direction(26, GPIO_MODE_INPUT);
//rmii clk ,can not change
gpio_set_direction(0, GPIO_MODE_INPUT);

//mdc to gpio23
gpio_matrix_out(PIN_SMI_MDC, EMAC_MDC_O_IDX, 0, 0);
//mdio to gpio18
gpio_matrix_out(PIN_SMI_MDIO, EMAC_MDO_O_IDX, 0, 0);
gpio_matrix_in(PIN_SMI_MDIO, EMAC_MDI_I_IDX, 0);
}

of EMAC_RX_CRS_DV to GPIO to GPIO27 but the code fails to get an IP. It's stuck at emac reset done

jakehuang wrote:
It is the ethernet PHY module I used, which has an 50Mhz crystal on board. I hooked it up
https://www.aliexpress.com/store/produc ... 94874.html

I used connections as laid out in example code here.
https://github.com/espressif/esp-idf/bl ... net_main.c

with addition of EMAC_RX_CRS_DV to GPIO to GPIO27 but the code fails to get an IP. It's stuck at emac reset done
..
Really need more docs and explanations here!!

jakehuang wrote:
It is the ethernet PHY module I used, which has an 50Mhz crystal on board. I hooked it up
https://www.aliexpress.com/store/produc ... 94874.html

I used connections as laid out in example code here.
https://github.com/espressif/esp-idf/bl ... net_main.c

with addition of EMAC_RX_CRS_DV to GPIO to GPIO27 but the code fails to get an IP. It's stuck at emac reset done


Really need more docs and explanations here!!