Linux/AM4372: CustomBoard: RS232 on UART1

Part Number: AM4372

Tool/software: Linux

Hello,

I have a question about using RS232. We have currently problems to send and receive Data over rs232.

I try to read the received data over cat /dev/ttyS1 but no data is recognized.

We use the MAX3243RS-232 transceiver on our Custom-Board

The Pinmux in the Devicetree for the Uart1 has been done as following:

	rs232_pins_default: rs232_pins_default {
		pinctrl-single,pins = <
			0x1e8 ( PIN_INPUT | MUX_MODE1 ) /* (AB20) cam1_data0.uart1_rxd */
			0x1ec ( PIN_OUTPUT | MUX_MODE1 ) /* (AC21) cam1_data1.uart1_txd */
			0x1f0 ( PIN_INPUT | MUX_MODE1 ) /* (AD21) cam1_data2.uart1_ctsn */
			0x1f4 ( PIN_OUTPUT | MUX_MODE1 ) /* (AE22) cam1_data3.uart1_rtsn */
			0x200 ( PIN_INPUT | MUX_MODE1 ) /* (AD23) cam1_data6.uart1_dcdn */
			0x1fc ( PIN_INPUT | MUX_MODE1 ) /* (AE23) cam1_data5.uart1_dsrn */
			0x204 ( PIN_OUTPUT | MUX_MODE1 ) /* (AE24) cam1_data7.uart1_dtrn */
		>;
	};


&uart1 {  
        pinctrl-names = "default";  
        pinctrl-0 = <&rs232_pins_default>;  
        status = "okay";  
};