【启明智显技术分享】sigmastar ssd202d双网口开发板多串口调试说明

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sigmastar ssd202d双网口开发板多串口调试说明

在这里插入图片描述

串口与设备节点的对应关系

**vi kernel/arch/arm/boot/dts/infinity2m-doublenet.dtsi**

    aliases {console = &uart0;serial0 = &uart0;serial1 = &uart1;serial2 = &fuart;serial3 = &uart2;};

** 加粗样式
普通串口配置

vi kernel/arch/arm/boot/dts/infinity2m-ssc011a-s01a-padmux-rgb565-rmii-doublenet.dtsi

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Fuart带流控：使用MODE1：默认波特率是9600

<PAD_FUART_RX          PINMUX_FOR_FUART_MODE_1  MDRV_PUSE_FUART_RX>,
<PAD_FUART_TX          PINMUX_FOR_FUART_MODE_1  MDRV_PUSE_FUART_TX>,
<PAD_FUART_CTS        PINMUX_FOR_FUART_MODE_1  MDRV_PUSE_FUART_CTS>,
<PAD_FUART_RTS        PINMUX_FOR_FUART_MODE_1   MDRV_PUSE_FUART_RTS>,

Fuart不带流控：使用MODE2：默认波特率是9600 // /dev/ttyS2

<PAD_FUART_RX    PINMUX_FOR_FUART_MODE_2    MDRV_PUSE_FUART_RX>,
<PAD_FUART_TX    PINMUX_FOR_FUART_MODE_2    MDRV_PUSE_FUART_TX>,

uart0配置：默认波特率是115200 // /dev/ttyS0

<PM_UART_RX    PINMUX_FOR_UART0_MODE_1    MDRV_PUSE_UART0_RX >,
<PM_UART_TX    PINMUX_FOR_UART0_MODE_1    MDRV_PUSE_UART0_TX >,

uart1配置：默认波特率是9600 // /dev/ttyS1

<PAD_UART1_RX    PINMUX_FOR_UART1_MODE_1   MDRV_PUSE_UART1_RX>,
<PAD_UART1_TX    PINMUX_FOR_UART1_MODE_1   MDRV_PUSE_UART1_TX>,

uart2配置：默认波特率是9600 // /dev/ttyS3

<PAD_GPIO8    PINMUX_FOR_UART2_MODE_2    MDRV_PUSE_UART2_RX>,
<PAD_GPIO9    PINMUX_FOR_UART2_MODE_2    MDRV_PUSE_UART2_TX>,

vi infinity2m-doublenet.dtsi

        uart0: uart0@1F221000 {compatible = "sstar,uart";reg = <0x1F221000 0x100>;interrupts = <GIC_SPI INT_IRQ_UART_0 IRQ_TYPE_LEVEL_HIGH>;clocks = <&CLK_uart0>;status = "ok";};uart1: uart1@1F221200 {compatible = "sstar,uart";reg = <0x1F221200 0x100>;interrupts = <GIC_SPI INT_IRQ_UART_1 IRQ_TYPE_LEVEL_HIGH>;clocks = <&CLK_uart1>;status = "ok";};fuart: uart2@1F220400 {compatible = "sstar,uart";reg = <0x1F220400 0x100>, <0x1F220600 0x100>;interrupts = <GIC_SPI INT_IRQ_FUART IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI INT_IRQ_URDMA IRQ_TYPE_LEVEL_HIGH>;clocks = <&CLK_fuart>;dma = <0>;sctp_enable = <0>;//rts cts enable is 1//pad = <PAD_FUART_CTS>;//tolerance = <2>;status = "ok";};uart2: uart2@1F221400 {compatible = "sstar,uart";reg = <0x1F221400 0x100>;interrupts = <GIC_SPI INT_IRQ_UART_2 IRQ_TYPE_LEVEL_HIGH>;clocks = <&CLK_uart2>;status = "ok";};

我们在其他地方是由复用到这些串口引脚，所以需要关闭