思路依然是看说明文档和例程本文仅提供参考务必自己从翻文档开始自己完成实验结果。一、新建新工程参考下图指令复制上一个工程到lab_3中间build 报错因为没清除上一个工程的build清除掉重编译即可。二、参考驱动和驱动说明文档修改设备树文件注意研读以下说明文档的“顶层节点属性”部分。我这里选择轮询模式。设备树参考/dts-v1/; #include st/f1/stm32f103Xe.dtsi #include st/f1/stm32f103z(c-d-e)tx-pinctrl.dtsi #include zephyr/dt-bindings/input/input-event-codes.h / { model alientek jingying stm32f103ze board; compatible alientek,stm32f103ze; chosen { zephyr,console usart1; zephyr,shell-uart usart1; zephyr,sram sram0; zephyr,flash flash0; }; aliases { leds leds; buzzer buzzer; }; // 格式【标签:】节点名 { 属性 }; leds: leds { compatible gpio-leds; led_0: led_0 { gpios gpiob 5 GPIO_ACTIVE_LOW; label LED 0; }; led_1: led_1 { gpios gpioe 5 GPIO_ACTIVE_LOW; label LED 1; }; }; buzzer: buzzer { compatible gpio-buzzer; gpios gpiob 8 GPIO_ACTIVE_HIGH; status okay; }; buttons { compatible gpio-keys; debounce-interval-ms 50; // 同时是轮询周期 polling-mode; zephyr,suspend-action none; //系统进入休眠suspend的时候这个按键对应的 GPIO 引脚驱动什么都不改保持休眠前的配置原样不动。 key_up { gpios gpioa 0 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH); zephyr,code INPUT_KEY_UP; }; key0 { gpios gpioe 4 (GPIO_PULL_UP | GPIO_ACTIVE_LOW); zephyr,code INPUT_KEY_0; }; key1 { gpios gpioe 3 (GPIO_PULL_UP | GPIO_ACTIVE_LOW); zephyr,code INPUT_KEY_1; }; }; }; clk_lsi { status okay; }; clk_hse { clock-frequency DT_FREQ_M(8); status okay; }; pll { mul 9; clocks clk_hse; status okay; }; rcc { clocks pll; clock-frequency DT_FREQ_M(72); ahb-prescaler 1; apb1-prescaler 2; apb2-prescaler 1; }; usart1 { pinctrl-0 usart1_tx_pa9 usart1_rx_pa10; pinctrl-names default; current-speed 115200; status okay; }; usart2 { pinctrl-0 usart2_tx_pa2 usart2_rx_pa3; pinctrl-names default; current-speed 115200; status okay; }; usart3 { pinctrl-0 usart3_tx_pb10 usart3_rx_pb11; pinctrl-names default; current-speed 115200; }; i2c1 { pinctrl-0 i2c1_scl_remap1_pb8 i2c1_sda_remap1_pb9; pinctrl-names default; status okay; clock-frequency I2C_BITRATE_FAST; }; spi1 { pinctrl-0 spi1_sck_master_pa5 spi1_miso_master_pa6 spi1_mosi_master_pa7; pinctrl-names default; cs-gpios gpiob 6 (GPIO_ACTIVE_LOW | GPIO_PULL_UP); status okay; }; spi2 { pinctrl-0 spi2_nss_master_pb12 spi2_sck_master_pb13 spi2_miso_master_pb14 spi2_mosi_master_pb15; pinctrl-names default; status okay; }; timers1 { st,prescaler 10000; status okay; pwm1: pwm { status okay; pinctrl-0 tim1_ch1_pwm_out_pa8; pinctrl-names default; }; }; timers2 { st,prescaler 255; status okay; pwm2: pwm { status okay; pinctrl-0 tim2_ch2_pwm_in_pa1; pinctrl-names default; }; }; iwdg { status okay; }; rtc { clocks rcc STM32_CLOCK(APB1, 28), rcc STM32_SRC_LSI RTC_SEL(2); status okay; }; adc12_common { status okay; }; die_temp { status disabled; }; dma1 { status okay; };我删除了原来与pa0冲突的引脚同时让temp休眠因为要用到冲突的adc。三、参考例程 编写main.c 和 prj.conf参考例程如下对上一章例程进行修改main.c#include zephyr/kernel.h #include zephyr/device.h #include zephyr/sys/printk.h #include zephyr/drivers/led.h #include zephyr/drivers/buzzer.h #include zephyr/input/input.h #define BUZZER_NODE DT_ALIAS(buzzer) BUILD_ASSERT(DT_NODE_HAS_STATUS_OKAY(BUZZER_NODE), No default buzzer specified in DT); #define LED_DEV_NODE DT_PATH(leds) BUILD_ASSERT(DT_NODE_HAS_STATUS_OKAY(LED_DEV_NODE), leds node not found); // 边沿缓存 static uint8_t last_key_up 0; static uint8_t last_key0 0; static uint8_t last_key1 0; // 独立状态变量 static bool buzzer_en false; static bool led0_on false; static bool led1_on false; static void button_input_cb(struct input_event *evt, void *user_data) { if (evt-type ! INPUT_EV_KEY) { return; } switch (evt-code) { case INPUT_KEY_UP: if (last_key_up 0 evt-value 1) { buzzer_en !buzzer_en; } last_key_up evt-value; break; case INPUT_KEY_0: if (last_key0 0 evt-value 1) { led0_on !led0_on; led1_on !led1_on; } last_key0 evt-value; break; case INPUT_KEY_1: if (last_key1 0 evt-value 1) { led1_on !led1_on; } last_key1 evt-value; break; default: break; } } INPUT_CALLBACK_DEFINE(NULL, button_input_cb, NULL); int main(void) { const struct device *buzzer DEVICE_DT_GET(BUZZER_NODE); const struct device *leds_dev DEVICE_DT_GET(LED_DEV_NODE); if (!device_is_ready(buzzer)) { return -ENODEV; } if (!device_is_ready(leds_dev)) { return -ENODEV; } while (1) { if (buzzer_en) { buzzer_beep(buzzer, BUZZER_DURATION_FOREVER); } else { buzzer_stop(buzzer); } if (led0_on) { led_on(leds_dev, 0); } else { led_off(leds_dev, 0); } if (led1_on) { led_on(leds_dev, 1); } else { led_off(leds_dev, 1); } k_msleep(50); } return 0; }prj.conf# Copyright (c) 2021 Nordic Semiconductor ASA # SPDX-License-Identifier: Apache-2.0 # # This file contains selected Kconfig options for the application. CONFIG_SENSORy CONFIG_GPIOy CONFIG_INPUTy CONFIG_LEDy CONFIG_BUZZERy CONFIG_PRINTKy CONFIG_LOGy个人学习笔记水平有限内容仅供参考欢迎评论区交流指正。