HAL Uart Receives My Uart Transmit Data

[in mozbek we trust]

Hey there,

• I communicate with electronic component that communicate with UART.
• I use STM32F0 MCU.
• I send Uart messages and make some process after electronic component sends its own Uart data.
•  

My problem is:

• When i use Uart_transmit. My uart receive interrupt function works. Acts like there is an echo.
• When i not send uart transmit and send some dummy uart data from pc (with rs232(ttl) usb) that works great.

Why my uart transmit function trigger my uart receive interrupt function

Best Regard

[waclawek.jan]

Some "electronic components", for example modems, tend to echo the received data.

JW

[in mozbek we trust]

It is vehicle alternator