sp485 communication reception is 0x00

zhang520

sp485 communication reception is 0x00 [Copy link]

S485, no matter how much data is sent, the serial assistant receives 0x00. Please find the s485 communication code connected to stm8s.

littleshrimp

485 is the original UART with 485 PHY added. You should first test whether the serial communication is normal, rule out software setting problems such as baud rate, and then hang up the 485 chip. Note that the power supply voltage is 5V, A and B cannot be connected incorrectly, there must be a 120 ohm resistor, and RE and DE must be configured reasonably.

book1

Is the baud rate determined correctly? For chips like stm8s, the clock can be modified and the baud rate will change accordingly.

annysky2012

Is there something wrong with the baud rate setting?