Need help in interfacing DP83848 Phy controller with ESP32
Posted: Tue Oct 30, 2018 11:53 am
HI, I am trying to interface ESP32 with Phy controller DP83848, i am using the Olimex reference Hardware Link
there is one change in hardware, instead of using BD5230G to control OSC, i am controlling it from GPIO pin of ESP32,
on Power up it is LOW for particular period.
The problem is i dont get any values from PHY, i have made following change in code,
but the PHY check always fails,
res1 and res2 are always 0xFFFF
i would like to know what may be problem, i have checked pin to pin connection between PHY and ESP32 and it seems OK.
is there anyway of troubleshooting, would like to know,
regards
sushant
there is one change in hardware, instead of using BD5230G to control OSC, i am controlling it from GPIO pin of ESP32,
on Power up it is LOW for particular period.
The problem is i dont get any values from PHY, i have made following change in code,
Code: Select all
#define LAN8720_PHY_ID1 0x2000 // 0x20005C90 for DP
#define LAN8720_PHY_ID2 0x5C90Code: Select all
// Call esp_eth_smi_wait_value() with a timeout so it prints an error periodically
res1 = esp_eth_smi_wait_value(MII_PHY_IDENTIFIER_1_REG, LAN8720_PHY_ID1, UINT16_MAX, 1000);
res2 = esp_eth_smi_wait_value(MII_PHY_IDENTIFIER_2_REG, LAN8720_PHY_ID2, LAN8720_PHY_ID2_MASK, 1000);i would like to know what may be problem, i have checked pin to pin connection between PHY and ESP32 and it seems OK.
is there anyway of troubleshooting, would like to know,
regards
sushant