from pyb import CAN 报错？

qrz4

同一串代码，在OpenMV3 R2里面运行正常（如图1），在OpenMV4 H7里面运行出现错误（如图2）

qrz4

import sensor, image, time
from pyb import CAN

sensor.reset()                      # Reset and initialize the sensor.
sensor.set_pixformat(sensor.RGB565) # Set pixel format to RGB565 (or GRAYSCALE)
sensor.set_framesize(sensor.QVGA)   # Set frame size to QVGA (320x240)
sensor.skip_frames(time = 2000)     # Wait for settings take effect.
clock = time.clock()                # Create a clock object to track the FPS.

while(True):
    clock.tick()                    # Update the FPS clock.
    img = sensor.snapshot()         # Take a picture and return the image.
    print(clock.fps())              # Note: OpenMV Cam runs about half as fast when connected
                                    # to the IDE. The FPS should increase once disconnected.

kidswong999

CAN总线在OpenMV4没启用。估计下一次固件解决。

qrz4

@kidswong999 OK，专门买最新一代V4来用的，下一代固件赶紧启用CAN总线啊，要不然我毕不了业了

kidswong999

@qrz4 CAN总线目前没有教程，而且CAN扩展板没有出售。

qrz4

@kidswong999 OpenMV3里面CAN总线测试成功了，用的CAN收发器，买了个OpenMV4想提高一下画质和处理速度，结果没启用CAN总线，相对于白买的OpenMV4咯？

kidswong999

你可以等过一阵的新版本。