UART with parallel RX

[mikl604]

Hello everybody!
It is necessary to read data simultaneously from 8 channels via UART. At the same time, the transmission to all channels is the same. That is, TX is one for everyone, and RX are different. The time parameters of the channels are identical. I take UART2, define TX to it on GPIO_17, and RX by mask with GPIO_16,12,13,14,21,25,26 and 27. It does not produce errors during compilation, but it does not work ...
Tell me how to do it correctly?

[ESP_Sprite]

You cannot connect the input of a peripheral (like an UART) to multiple pins at the same time.