解决 去掉UIO

我这里只是展示了读文件，但是它返回一直为空，TXT文件里面是一串数字

number = 1
fo = uio.open("/keypoints/s1/bill1.txt" ,"r+" )
fo.seek(0)
balance = fo.read(3).encode('utf-8')
fo.close()
print(balance)
balance = int(balance)

编译器报错：
Traceback (most recent call last):
File "", line 74, in
File "", line 67, in test_color_bars
Exception: COLOR BARS TEST FAILED.BAR#(1): RGB(255,255,255)
MicroPython: v1.15-r32 OpenMV: v4.0.2 HAL: v1.9.0 BOARD: OPENMV4P-STM32H743

# 自检例程

版本是0PENMV4 CAM H7 PIUS，自检没通过，到这儿，我也不知道怎么回事了。

这个例子展示了OpenMV Cam在被允许出厂之前如何测试自己。每个OpenMV Cam都应该通过这个测试。

import sensor, time, pyb

def test_int_adc():
adc = pyb.ADCAll(12)
# VBAT测试
vbat = adc.read_core_vbat()
vbat_diff = abs(vbat-3.3)
if (vbat_diff > 0.1):
raise Exception('INTERNAL ADC TEST FAILED VBAT=%fv'%vbat)

# 测试VREF
vref = adc.read_core_vref()
vref_diff = abs(vref-1.2)
if (vref_diff > 0.1):
    raise Exception('INTERNAL ADC TEST FAILED VREF=%fv'%vref)
adc = None
print('INTERNAL ADC TEST PASSED...')

def test_color_bars():
sensor.reset()
# 设置传感器
sensor.set_brightness(0)
sensor.set_saturation(3)
sensor.set_gainceiling(8)
sensor.set_contrast(2)

# 设置传感器像素格式
sensor.set_framesize(sensor.QVGA)
sensor.set_pixformat(sensor.RGB565)

# 启用颜色条测试模式
sensor.set_colorbar(True)

# 跳过几帧，让传感器稳定下来
for i in range(0, 100):
    image = sensor.snapshot()

# 颜色条阈值
t = [lambda r, g, b: r < 70  and g < 70  and b < 70,   # Black
     lambda r, g, b: r < 70  and g < 70  and b > 200,  # Blue
     lambda r, g, b: r > 200 and g < 70  and b < 70,   # Red
     lambda r, g, b: r > 200 and g < 70  and b > 200,  # Purple
     lambda r, g, b: r < 70  and g > 200 and b < 70,   # Green
     lambda r, g, b: r < 70  and g > 200 and b > 200,  # Aqua
     lambda r, g, b: r > 200 and g > 200 and b < 70,   # Yellow
     lambda r, g, b: r > 200 and g > 200 and b > 200]  # White

# 颜色条在OV7725中是反向的
if (sensor.get_id() == sensor.OV7725):
    t = t[::-1]

#320x240图像有8个颜色条，每个大约是40像素。
#我们从帧缓冲区的中心开始，并从每个颜色条的中心平均取10个采样像素的值。
for i in range(0, 8):
    avg = (0, 0, 0)
    idx = 40*i+20 #色条中心
    for off in range(0, 10): #avg 10 pixels
        rgb = image.get_pixel(idx+off, 120)
        avg = tuple(map(sum, zip(avg, rgb)))

    if not t[i](avg[0]/10, avg[1]/10, avg[2]/10):
        raise Exception('COLOR BARS TEST FAILED.'
        'BAR#(%d): RGB(%d,%d,%d)'%(i+1, avg[0]/10, avg[1]/10, avg[2]/10))

print('COLOR BARS TEST PASSED...')

if name == 'main':
print('')
test_int_adc()
test_color_bars()

# Motor Shield PWM Example
#
# This example shows off how to control the motor shield on your
# OpenMV Cam. The motor shield is controlled by using the PYB module
# which lets you do PWM to control the speed and set digital I/O pin
# states. The motor shield needs 6 I/O pins for both motors.

import pyb
#from pyb import Pin, Timer
tim = pyb.Timer(4, freq=50)
chA = tim.channel(1, pyb.Timer.PWM, pin=pyb.Pin("P7"))#
chB = tim.channel(2, pyb.Timer.PWM, pin=pyb.Pin("P8"))

times = 500
while (times >1):
    chA.pulse_width_percent(40)#
    chB.pulse_width_percent(30)#
    times = times - 1
    pyb.delay(10)

chA.pulse_width_percent(0)#向前
chB.pulse_width_percent(0)#