K230-CanMV 开发板 — 代码例程

例程 1：CanMV — 摄像头采集 + AI 物体检测

import time
import os
from media.camera import *
from media.display import *
from media.media import *
from libs.Utils import *

# 初始化摄像头（MIPI CSI0，IMX335 传感器）
camera = Camera()
camera.set_outdev(2, 0)  # 输出到 VF (Video Frame)

# 传感器配置
sensor = camera.sensor()
sensor.reset()
sensor.set_framesize(SENSOR_1920X1080)
sensor.set_pixformat(SENSOR_RGB888)

# 初始化 HDMI 显示
display = Display(Display.VIRT, 1920, 1080)
display.set_ideal_size(1920, 1080)
display.set_backlight(100)

# 初始化 AI
from libs.AIBase import AIBase
from libs.YOLO import YOLO

yolo = YOLO("/sdcard/models/yolov5s.kmodel", 0.5, 0.4)

# 主循环
MediaManager.init()
camera.start()
display.show()

try:
    while True:
        img = camera.capture_image()
        if img is None:
            continue

        # AI 推理
        results = yolo.run(img)

        # 画检测框
        for det in results:
            x, y, w, h = det['bbox']
            cls = det['class']
            conf = det['confidence']
            img.draw_rectangle(x, y, w, h, color=(0, 255, 0), thickness=2)
            img.draw_string(x, y - 20,
                          f"{cls} {conf:.2f}",
                          color=(0, 255, 0), scale=2)

        display.show(img)
        del img

except KeyboardInterrupt:
    pass
finally:
    camera.stop()
    display.deinit()
    MediaManager.deinit()

---

例程 2：CanMV — 双路摄像头同时采集

from media.camera import *
from media.display import *
from media.media import *

# 摄像头 0 (MIPI CSI0 - IMX335)
cam0 = Camera(id=0)
cam0.sensor().set_framesize(SENSOR_1280X720)
cam0.sensor().set_pixformat(SENSOR_RGB888)

# 摄像头 1 (MIPI CSI1 - OV5647)
cam1 = Camera(id=1)
cam1.sensor().set_framesize(SENSOR_1280X720)
cam1.sensor().set_pixformat(SENSOR_RGB888)

# HDMI 显示（画中画）
display = Display(Display.VIRT, 1920, 1080)

MediaManager.init()
cam0.start()
cam1.start()
display.show()

try:
    while True:
        img0 = cam0.capture_image()
        img1 = cam1.capture_image()

        if img0 and img1:
            # 拼接左右双画面
            img0.draw_image(img1, 960, 0)  # 右半部分
            img0.draw_string(10, 10, "CAM0 (Left)", color=(0,255,0), scale=2)
            img0.draw_string(970, 10, "CAM1 (Right)", color=(0,255,0), scale=2)
            display.show(img0)

        del img0, img1

except KeyboardInterrupt:
    cam0.stop()
    cam1.stop()
    display.deinit()
    MediaManager.deinit()

---

例程 3：CanMV — 40Pin GPIO 控制 (树莓派兼容)

from machine import Pin, PWM, I2C, UART
import time

# --- GPIO 输出 ---
led = Pin(12, Pin.OUT)  # GPIO12 (Pin 32)
for _ in range(5):
    led.value(1)
    time.sleep(0.3)
    led.value(0)
    time.sleep(0.3)

# --- PWM ---
pwm = PWM(Pin(13), freq=1000, duty=50)  # GPIO13 (Pin 33)
print(f"PWM: freq={pwm.freq()}, duty={pwm.duty()}")

for d in range(0, 101, 5):
    pwm.duty(d)
    time.sleep(0.05)
pwm.deinit()

# --- I2C 扫描 ---
i2c = I2C(1, freq=100000)  # I2C1: GPIO2(SDA), GPIO3(SCL)
devices = i2c.scan()
print(f"I2C devices found: {[hex(d) for d in devices]}")

# --- UART 发送 ---
uart = UART(2, baudrate=115200)  # GPIO14(TX), GPIO15(RX)
uart.write("Hello from K230 CanMV!\r\n")
print(f"UART RX: {uart.read()}")

---

例程 4：CanMV — Wi-Fi 6 连接 + MQTT 物联网

import network
import time
from umqtt.simple import MQTTClient

# Wi-Fi 6 连接
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect("YOUR_SSID", "YOUR_PASSWORD")

print("Connecting to Wi-Fi 6...")
while not wlan.isconnected():
    time.sleep(0.5)

print(f"Connected! IP: {wlan.ifconfig()[0]}")
print(f"RSSI: {wlan.status('rssi')} dBm")

# MQTT 连接
mqtt = MQTTClient(
    client_id="K230-CanMV",
    server="broker.emqx.io",
    port=1883
)
mqtt.connect()
print("MQTT connected!")

# 订阅主题
def on_message(topic, msg):
    print(f"[MQTT] {topic.decode()}: {msg.decode()}")

mqtt.set_callback(on_message)
mqtt.subscribe(b"k230/command")

# 定时发布传感器数据
counter = 0
try:
    while True:
        mqtt.check_msg()
        mqtt.publish(b"k230/status", f"Uptime: {counter}s".encode())
        counter += 5
        time.sleep(5)
except KeyboardInterrupt:
    mqtt.disconnect()
    wlan.disconnect()

---

例程 5：CanMV — 人脸识别门禁（完整流程）

import time
from media.camera import *
from media.display import *
from media.media import *
from machine import Pin
from libs.FaceRecognition import FaceRecognition

# 初始化
camera = Camera()
camera.sensor().set_framesize(SENSOR_640X480)
display = Display(Display.VIRT, 640, 480)

# 人脸识别引擎
face_rec = FaceRecognition("/sdcard/models/face_detect.kmodel",
                           "/sdcard/models/face_recognize.kmodel")

# 注册人脸（管理员）
print("Registering admin face...")
admin_img = camera.capture_image()
face_rec.register("admin", admin_img)
print("Admin face registered!")

# 门锁继电器 (GPIO12, 低电平触发)
lock = Pin(12, Pin.OUT)
lock.value(1)  # 默认锁定

MediaManager.init()
camera.start()
display.show()

try:
    while True:
        img = camera.capture_image()
        if img is None:
            continue

        # 人脸识别
        results = face_rec.recognize(img)

        for r in results:
            name = r['name']
            conf = r['confidence']
            x, y, w, h = r['bbox']

            color = (0, 255, 0) if name == "admin" and conf > 0.75 else (255, 0, 0)
            img.draw_rectangle(x, y, w, h, color=color, thickness=2)
            img.draw_string(x, y - 16, f"{name} {conf:.2f}",
                          color=color, scale=1)

            # 管理员识别成功 → 开门
            if name == "admin" and conf > 0.75:
                lock.value(0)  # 开门
                img.draw_string(200, 10, "DOOR OPENED!",
                              color=(0, 255, 0), scale=3)
                time.sleep(3)
                lock.value(1)  # 关门

        display.show(img)
        del img

except KeyboardInterrupt:
    pass
finally:
    camera.stop()
    display.deinit()
    MediaManager.deinit()
    lock.value(1)

---

例程 6：CanMV — 以太网 + HTTP 服务器

import network
import socket

# 初始化以太网
eth = network.LAN()
eth.active(True)
while not eth.isconnected():
    pass

print(f"Ethernet connected! IP: {eth.ifconfig()[0]}")

# 简易 HTTP 服务器
addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1]
s = socket.socket()
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(addr)
s.listen(5)

print(f"HTTP server on http://{eth.ifconfig()[0]}")

HTML = """HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n
<html><body>
<h1>K230-CanMV Server</h1>
<p>AI Edge Computing Platform</p>
<p>6 TOPS NPU | RISC-V 1.6GHz | Wi-Fi 6</p>
</body></html>"""

while True:
    cl, addr = s.accept()
    print(f"Request from {addr}")
    cl.send(HTML.encode())
    cl.close()

---

开发环境配置

步骤	操作
1. 安装 CanMV IDE	下载 CanMV IDE
2. 连接开发板	USB Type-C (OTG口) 连接电脑
3. 选择设备	CanMV IDE → 工具 → 选择串口 → K230
4. 上传代码	直接在 IDE 中运行或保存到 /sdcard/main.py 自动启动
5. 模型转换	使用 nncase 工具将 ONNX/TFLite → kmodel，放入 SD 卡