openmv能同时输出多少个pwm？

好的，谢谢~~~

openmv的引脚可以输出5V高电平么？

apriltag的3d定位中，坐标Tx, Ty, Tz，Rx,Ry,Rz 这几个量具体表示什么意思？

例程讲解-09-qrcodes_with_lens_zoom二维码识别

此例程为09-qrcodes_with_lens_zoom.py 本例程的目标是实现二维码检测。

QRCode Example

这个例子展示了OpenMV Cam的功能，可以在不需要镜头校正的情况下检测QR码。

import sensor, image, time

sensor.reset()
sensor.set_pixformat(sensor.GRAYSCALE)
sensor.set_framesize(sensor.VGA)
sensor.set_windowing((240, 240)) # look at center 240x240 pixels of the VGA resolution.
sensor.skip_frames(30)
sensor.set_auto_gain(False) # must turn this off to prevent image washout...
clock = time.clock()

while(True):
clock.tick()
img = sensor.snapshot()
for code in img.find_qrcodes():
print(code)
print(clock.fps())
只找到了这个

可以把二维码的中心坐标表示出来么？

识别二维码的教程是哪个？

烧进去之后，摄像头就不往回传数了

# Blob Detection and uart transport
import sensor, image, time
from pyb import UART
import json
# For color tracking to work really well you should ideally be in a very, very,
# very, controlled enviroment where the lighting is constant...
yellow_threshold   = (65, 100, -10, 6, 24, 51)
# You may need to tweak the above settings for tracking green things...
# Select an area in the Framebuffer to copy the color settings.

sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565) # use RGB565.
sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.
sensor.skip_frames(10) # Let new settings take affect.
sensor.set_auto_whitebal(False) # turn this off.
clock = time.clock() # Tracks FPS.

uart = UART(3, 115200)

while(True):
    img = sensor.snapshot() # Take a picture and return the image.

    blobs = img.find_blobs([yellow_threshold])
    if blobs:
        print('sum :', len(blobs))
        output_str = json.dumps(blobs)
        for b in blobs:
            # Draw a rect around the blob.
            img.draw_rectangle(b.rect()) # rect
            img.draw_cross(b.cx(), b.cy()) # cx, cy

        print('you send:',output_str)
        uart.write(output_str+'\n')
    else:
        print('not found!')

这个代码不能够显示

我想将openmv的数据传输到串口助手上，参照教程，发送 hello world串口助手可以收到，但发送复杂的数据就都没有反应，这是为什么？

想通过stm32来接收openmv传输回来的位置信息，哪位有相关的资料？