Posted on April 17, 2013 at 00:21 I'm using the STM32F4x7 + LwIP example code, modified to work with RMII and a LAN8720 PHY. I can send and receive Ethernet data - great! Unfortunately whenever I send a UDP packet, it has 50 bytes more pa...

Posted on October 13, 2012 at 06:49Input bias current is not listed, so I don't know how to size a resistor divider for use with the STM32F3xx series. Has anybody measured it? Is it hiding in a datasheet I haven't found?Thanks!-Sasha #opamp

Posted on September 12, 2012 at 21:43According to the datasheet, the STM32F4 processors can accept up to 50MHz on the external clock input, but the clock configuration tool only permits inputs up to 25MHz. Is this intentional? Does that mean there's...

Posted on September 06, 2012 at 07:13I'm having some difficulty communicating with a TI INA219 using an STM32F407VE and I2C1 on PB7 and PB8. Sending data seems to work just fine, but receiving it does not. Namely, my EV6 (I2C_EVENT_MASTER_RECEIVER_M...

Posted on August 31, 2012 at 01:02I'm trying to use RMII between an STM32F407VE and an SMSC LAN8720 PHY. So far I've followed along with the STM32F4 Ethernet example but am having less than stellar success.As far as I can tell, MDC and MDIO go low a...