LuckFox Pico、Luckfox Pico Mini A/B 与 LuckFox Pico Plus 是基于瑞芯微 RV1103 芯片的低成本微型 linux 开发板，而 LuckFox Pico Pro 与 LuckFox Pico Max 是基于瑞芯微 RV1106 芯片的低成本微型 linux 开发板。RV1103/RV1106 是一款专门用于人工智能相关应用的高度集成 IPC 视觉处理器 SoC。它基于单核 ARM Cortex-A7 32 位内核，集成了 NEON 和 FPU，并内置 NPU 支持 INT4 / INT8 / INT16 混合运算，计算能力高达 0.5TOPs。
目前是想用 Luckfox pico 来驱动 dht11
cd /home/luckfox/Luckfox-Pico/luckfox-pico/sysdrv/source/kernel
cp ./arch/arm/configs/luckfox_rv1106_linux_defconfig .config
make ARCH=arm menuconfig搜索dht11，打开使能。接下来保存配置
make ARCH=arm savedefconfig
cp defconfig ./arch/arm/configs/luckfox_rv1106_linux_defconfigvi /home/luckfox/Luckfox-Pico/luckfox-pico/sysdrv/source/kernel/arch/arm/boot/dts/rv1103g-luckfox-pico.dts
设备树不太明白，自己仿着写的，应该是错的
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright (c) 2022 Rockchip Electronics Co., Ltd.
*/
/dts-v1/;
#include "rv1103.dtsi"
#include "rv1106-evb.dtsi"
#include "rv1103-luckfox-pico-ipc.dtsi"
/ {
model = "Luckfox Pico";
compatible = "rockchip,rv1103g-38x38-ipc-v10", "rockchip,rv1103";
dht11 {
compatible = "dht11";
gpios = <&gpio1 55 GPIO_ACTIVE_HIGH>; //dht11 data引脚接着开发板的 55 号引脚
linux,open-drain;
pinctrl-names = "default";
pinctrl-0 = <&gpio1_pc7>;
status = "okay";
};
gpio4pa2:gpio4pa2 {
compatible = "regulator-fixed";
pinctrl-names = "default";
pinctrl-0 = <&gpio4_pa2>;
regulator-name = "gpio4_pa2";
regulator-always-on;
};
gpio4pa3:gpio4pa3 {
compatible = "regulator-fixed";
pinctrl-names = "default";
pinctrl-0 = <&gpio4_pa3>;
regulator-name = "gpio4_pa3";
regulator-always-on;
};
gpio4pa4:gpio4pa4 {
compatible = "regulator-fixed";
pinctrl-names = "default";
pinctrl-0 = <&gpio4_pa4>;
regulator-name = "gpio4_pa4";
regulator-always-on;
};
gpio4pa6:gpio4pa6 {
compatible = "regulator-fixed";
pinctrl-names = "default";
pinctrl-0 = <&gpio4_pa6>;
regulator-name = "gpio4_pa6";
regulator-always-on;
};
gpio4pb0:gpio4pb0 {
compatible = "regulator-fixed";
pinctrl-names = "default";
pinctrl-0 = <&gpio4_pb0>;
regulator-name = "gpio4_pb0";
regulator-always-on;
};
gpio4pb1:gpio4pb1 {
compatible = "regulator-fixed";
pinctrl-names = "default";
pinctrl-0 = <&gpio4_pb1>;
regulator-name = "gpio4_pb1";
regulator-always-on;
};
};
/**********GPIO**********/
&pinctrl {
gpio1-pc7 {
gpio1_pc7:gpio1-pc7 {
rockchip,pins = <1 RK_PC7 RK_FUNC_GPIO &pcfg_pull_none>; //其实我也不知道这干嘛的，但是看文档有这么一句
};
};
gpio4-pa2 {
gpio4_pa2:gpio4-pa2 {
rockchip,pins = <4 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
gpio4-pa3 {
gpio4_pa3:gpio4-pa3 {
rockchip,pins = <4 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
gpio4-pa4 {
gpio4_pa4:gpio4-pa4 {
rockchip,pins = <4 RK_PA4 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
gpio4-pa6 {
gpio4_pa6:gpio4-pa6 {
rockchip,pins = <4 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
gpio4-pb0 {
gpio4_pb0:gpio4-pb0 {
rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
gpio4-pb1 {
gpio4_pb1:gpio4-pb1 {
rockchip,pins = <4 RK_PB1 RK_FUNC_GPIO &pcfg_pull_none>;
};
};
};
// &sfc {
// status = "okay";
// flash@0 {
// compatible = "spi-nand";
// reg = <0>;
// spi-max-frequency = <75000000>;
// spi-rx-bus-width = <4>;
// spi-tx-bus-width = <1>;
// };
// };
&usbdrd_dwc3 {
dr_mode = "peripheral";
};
&gmac {
status = "disabled";
};
/**********I2C**********/
// &i2c0 {
// status = "okay";
// pinctrl-0 = <&i2c0m2_xfer>;
// clock-frequency = <100000>;
// };
&i2c3 {
status = "okay";
pinctrl-0 = <&i2c3m1_xfer>;
clock-frequency = <100000>;
};
/**********SPI**********/
&spi0 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi0m0_pins>;
cs-gpios = <&gpio1 RK_PC0 1>;
// cs-gpios = <&gpio1 26 1>;
#address-cells = <1>;
#size-cells = <0>;
spidev@0 {
compatible = "rockchip,spidev";
spi-max-frequency = <1000000000>;
reg = <0>;
};
};
/**********UART**********/
&uart3 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&uart3m1_xfer>;
};
&uart4 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&uart4m1_xfer>;
};
// &uart5 {
// status = "okay";
// pinctrl-names = "default";
// pinctrl-0 = <&uart5m0_xfer>;
// };
/**********PWM**********/
&pwm0 {
status = "okay";
pinctrl-names = "active";
pinctrl-0 = <&pwm0m0_pins>;
// pinctrl-0 = <&pwm0m1_pins>;
};
&pwm1 {
status = "okay";
pinctrl-names = "active";
pinctrl-0 = <&pwm1m0_pins>;
// pinctrl-0 = <&pwm1m1_pins>;
};
// &pwm2 {
// status = "okay";
// pinctrl-names = "active";
// pinctrl-0 = <&pwm2m2_pins>;
// };
// &pwm3 {
// status = "okay";
// pinctrl-names = "active";
// pinctrl-0 = <&pwm3m2_pins>;
// };
// &pwm4 {
// status = "okay";
// pinctrl-names = "active";
// pinctrl-0 = <&pwm4m2_pins>;
// };
// &pwm5 {
// status = "okay";
// pinctrl-names = "active";
// pinctrl-0 = <&pwm5m2_pins>;
// };
// &pwm6 {
// status = "okay";
// pinctrl-names = "active";
// pinctrl-0 = <&pwm6m2_pins>;
// };
// &pwm7 {
// status = "okay";
// pinctrl-names = "active";
// pinctrl-0 = <&pwm7m2_pins>;
// };
// &pwm8 {
// status = "okay";
// pinctrl-names = "active";
// // pinctrl-0 = <&pwm8m1_pins>;
// pinctrl-0 = <&pwm8m0_pins>;
// };
// &pwm9 {
// status = "okay";
// pinctrl-names = "active";
// // pinctrl-0 = <&pwm9m1_pins>;
// pinctrl-0 = <&pwm9m0_pins>;
// };
&pwm10 {
status = "okay";
pinctrl-names = "active";
pinctrl-0 = <&pwm10m1_pins>;
// pinctrl-0 = <&pwm10m2_pins>;
// pinctrl-0 = <&pwm10m0_pins>;
};
//&pwm11 { pwm11注释掉，55引脚变成普通IO引脚
// status = "disabled";
// pinctrl-names = "active";
// pinctrl-0 = <&pwm11m1_pins>;
// pinctrl-0 = <&pwm11m2_pins>;
// pinctrl-0 = <&pwm11m0_pins>;
//};cd /home/luckfox/Luckfox-Pico/luckfox-pico
./build.sh kernel上面编译会得到 boot.img ，替换掉从这里下载的镜像中的 boot.img
烧录之后，adb shell 进到开发板里，/dev 里面没有 dht11 的设备文件
想知道是哪一步错了呢？大佬们帮帮忙。
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luckfox好像没buildroot教程
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最新的SDK，文件系统已经是基于Buildroot构建的了！
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你的设备请求的驱动是 compatible = "dht11";
kernel 中必须有对应的driver才行
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