UART speed possibly wrong
- by Mike
My brain is fried, so I thought I would pass this one to the community.
When sending 1 character to my embedded system, it consistently thinks it receives 2 characters. The first received character seems to map to the transmitted character (in some unkown way) and the second received character is always 0xff
Here is what I observed:
Tx char (in hex) Rx character (in hex), I left out the second byte (always ff)
31 9D
32 9B
33 99
61 3D
62 3B
63 39
64 37
65 35
41 7D
42 7B
43 79
I have check my clocks and them seem to be ok. The only diff between this non working version and the previous version is that i am now using a RS485 chip.
I have traced the signal all the way up to the MCU and it looks fine (confirmed the bit value on the rx pin)
