Hello @Pavel A.,
> Please use the debugger and find where exactly HAL_ETH_Init errors out.
STM32 performs Software reset operation after setting register bit (SWR in ETH_DMAMR). This bit is automatically cleared after the reset operation is complete in all clock domains. The reset operation is complete only when all resets in all active clock domains are deasserted. Therefore, it is essential that all PHY inputs clocks (applicable for the selected PHY interface) are present for software reset completion.
In our case, this bit (SWR in ETH_DMAMR) is not automatically cleared after setting the register bit. We are waiting 500 msec to check this bit is automatically cleared or not.
/* Ethernet Software reset */
/* Set the SWR bit: resets all MAC subsystem internal registers and logic */
/* After reset all the registers holds their respective reset values */
SET_BIT(heth->Instance->DMAMR, ETH_DMAMR_SWR);
/* Get tick */
tickstart = HAL_GetTick();
/* Wait for software reset */
while (READ_BIT(heth->Instance->DMAMR, ETH_DMAMR_SWR) > 0U)
{
if (((HAL_GetTick() - tickstart) > ETH_SWRESET_TIMEOUT))
{
/* Set Error Code */
heth->ErrorCode = HAL_ETH_ERROR_TIMEOUT;
/* Set State as Error */
heth->gState = HAL_ETH_STATE_ERROR;
/* Return Error */
return HAL_ERROR;
}
}
