Hello, I have a custom development board using the 52840 chip, with two LEDs and a serial port connected. It worked well when developing with nrf5 previously. Recently, when using NCS, I modified the LED and UART pins as required. The LEDs light up correctly, but the serial port does not work. Could you tell me the reason? The circuit schematic and overlay configuration are shown below.
&led0 {
gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
};
&led1 {
gpios = <&gpio0 30 GPIO_ACTIVE_LOW>;
};
&pinctrl {
uart0_default：uart0_default {
group1 {
psels = <NRF_PSEL（UART_TX， 0， 0）>，
<NRF_PSEL（UART_RTS， 0， 0xFFFF)>;
};
group2 {
psels = <NRF_PSEL（UART_RX， 0， 1）>，
<NRF_PSEL（UART_CTS， 0， 0xFFFF)>;
bias-pull-up;
};
};
uart0_sleep：uart0_sleep {
group1 {
psels = <NRF_PSEL（UART_TX， 0， 0）>，
<NRF_PSEL（UART_RX， 0， 1）>，
<NRF_PSEL（UART_RTS， 0， 0xFFFF）>，
<NRF_PSEL（UART_CTS， 0， 0xFFFF)>;
low-power-enable;
};
};
};
