I'm using a stm32l433 with its bootloader, in uart a send the following sequence
- the read command 0x11 0xEE
- receive ACK
- send the address with checksum
- receive ACK or two NACKs
Sometimes the 4th step is an ACK, others NACKs and i don't know why.
When i receive NACK my code retry sending read command and the address and know everything works fine,
So, maybe my code is wrong and i do not calculate correctly the checksum or maybe yes, but why the 2 NACK's? Does that mean something?
