stm32f4 i2c

santoshpawar · ‎2013-07-29

Posted on July 30, 2013 at 06:32

hi I am santosh,

I am using stm32f407zet6 for communicating with accelerometer using i2c interrupt mode

My problem is after receving no of bytes to be read RXNE and BTF flag remained set .

and after that interrupt is not genererated. I have cleared RXNE and BTF flag after I2C_STOP.

pls somebody give me proper i2c event isr

Regards,

Santosh pawar

#i2c #stm32f4-i2c

jpeacock2399 · ‎2013-07-30

Posted on July 30, 2013 at 15:56

Make sure you are sending a NAK at n-2 bytes received and a STOP at n-1 bytes. For single byte transfers NAK must be sent before the first byte is received. Look at the timing for EV6 and EV7 events.

Jack Peacock