I've just finished a new design using I.MX6Q, i've connected UART3 to WL18xx module with the following pinout :
- EIM_D24 (TXD) connected to WL18xx RX
- EIM_D25 (RXD) connected to WL18xx TX
- EIM_D30 (configured as CTS_B) connected to WL18xx RTS
- EIM_D31 (configured as RTS_B) connected to WL18xx CTS
After reading user manual, i noticed that RTS in DCE mode is seen as an input as must be connected to WL18xx RTS and vice and versa. But with yocto, i can also configure EIM_D30 as RTS_B and EIM_D31 as CTS_B (MX6QDL_PAD_EIM_D31__UART3_CTS_B & MX6QDL_PAD_EIM_D30__UART3_RTS_B) but it does not work anymore.
Is there a way to invert by software both pins without modifying TX & RX ?