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BPI-Pico-S3 与 Raspberry Pi Pico 板尺寸相同，搭载ESP32S3芯片，8M flash，4层PCB，电镀半孔工艺，陶瓷天线，支持 2.4 GHz Wi-Fi 和 Bluetooth® LE 双模无线通信，是一款专为物联网开发和Maker DIY设计的开发板。

出厂内置 tinyUF2 + CircuitPython，推荐使用Mu编辑器上手CircuitPython开发。

BiliBili视频https://www.bilibili.com/video/BV1zt4y1N7Je

硬件接口示意图

使用双轴摇杆

这是一个常见的双轴XY摇杆模块，使用了两个电位器最为其核心器件，通过芯片的ADC 模/数转换器 读取它们各自的电压数值，即可将读数转化为其在XY坐标轴上的位置。

双轴摇杆BPI-PicoW-S3

GND	GND
+5V	3V3
VRx	GP26_A0
VRY	GP27_A1

1. 在CircuitPython中提供的ADC精度是16bit，即最大值的16进制表达为 FFFF，10进制表达为 65535，对应的电压量程为0mv ~ 3300mv。BPI-PicoW-S3所使用的EPS32S3芯片实际ADC电压量程为0mv ~ 3100mv，所以实际应用时仅能测量到3100mv。

1. 基础ADC读数，读取两个电位器的数值，转换为电压数值。

importboard,analogio,time

x_axis_pin=analogio.AnalogIn(board.A0)
y_axis_pin=analogio.AnalogIn(board.A1)

whileTrue:
x_axis=x_axis_pin.value
y_axis=y_axis_pin.value
# print((x_axis,y_axis))
x_value=x_axis/65535*3300
y_value=y_axis/65535*3300
print("{0}mv,{1}mv".format(x_value,y_value))
time.sleep(0.1)

1. 在Mu编辑器中，点击Plotter图标即可显示绘图仪，可以实时将REPL输出的数值显示为与时间相关的折线图。

1. 以下程序可实现校准坐标零点的功能。开始运行的前五秒，请静止摇杆等待获取零点数值。

importboard,analogio,time

x_axis_pin=analogio.AnalogIn(board.A0)
y_axis_pin=analogio.AnalogIn(board.A1)

defget_zero(times=500,sleep=0.01):
x_total=0
y_total=0
foriinrange(times):
x_axis=x_axis_pin.value
y_axis=y_axis_pin.value
x_total+=x_axis
y_total+=y_axis
time.sleep(sleep)
x_zero=x_total//times
y_zero=y_total//times
return(x_zero,y_zero)

zero=get_zero(times=500,sleep=0.01)
print(zero)

whileTrue:
x_axis=x_axis_pin.value-zero[0]
y_axis=y_axis_pin.value-zero[1]
print((x_axis,y_axis))
time.sleep(0.1)

1. 以下程序可获取摇杆方向，这是双轴摇杆最常见的应用。

importboard,analogio,time

x_axis_pin=analogio.AnalogIn(board.A0)
y_axis_pin=analogio.AnalogIn(board.A1)

direction_list=["East","Southeast","South","Southwest","West","Northwest","North","Northeast","Centre"]

defget_zero(times=500,sleep=0.01):
x_total=0
y_total=0
foriinrange(times):
x_axis=x_axis_pin.value
y_axis=y_axis_pin.value
x_total+=x_axis
y_total+=y_axis
time.sleep(sleep)
x_zero=x_total//times
y_zero=y_total//times
return(x_zero,y_zero)

defget_direction(zero=(32767,32767)):
x_axis=x_axis_pin.value-zero[0]
y_axis=y_axis_pin.value-zero[1]
ifx_axis>=10000and-10000<y_axis<10000:
returndirection_list[0]
elifx_axis>=10000andy_axis<=-10000:
returndirection_list[1]
elif-10000<x_axis<10000andy_axis<=-10000:
returndirection_list[2]
elifx_axis<=-10000andy_axis<=-10000:
returndirection_list[3]
elifx_axis<=-10000and-10000<y_axis<10000:
returndirection_list[4]
elifx_axis<=-10000andy_axis>=10000:
returndirection_list[5]
elif-10000<x_axis<10000andy_axis>=10000:
returndirection_list[6]
elifx_axis>=10000andy_axis>=10000:
returndirection_list[7]
else:
returndirection_list[8]

zero=get_zero(times=50,sleep=0.01)
print(zero)

whileTrue:
x_axis=x_axis_pin.value-zero[0]
y_axis=y_axis_pin.value-zero[1]
print((x_axis,y_axis))
print(get_direction(zero=zero))
time.sleep(0.1)

1. 以下程序可设置坐标精度等级，计算每级跨度，可以按需求消除抖动，增强数据的实用性。

importboard,analogio,time

x_axis_pin=analogio.AnalogIn(board.A0)
y_axis_pin=analogio.AnalogIn(board.A1)

defget_zero(times=500,sleep=0.01):
x_total=0
y_total=0
foriinrange(times):
x_axis=x_axis_pin.value
y_axis=y_axis_pin.value
x_total+=x_axis
y_total+=y_axis
time.sleep(sleep)
x_zero=x_total//times
y_zero=y_total//times
return(x_zero,y_zero)

defget_extremum(times=500,sleep=0.01):
x_list=[]
y_list=[]
foriinrange(times):
x_axis=x_axis_pin.value
y_axis=y_axis_pin.value
x_list.append(x_axis)
y_list.append(y_axis)
time.sleep(sleep)
x_extremum=(min(x_list),max(x_list))
y_extremum=(min(y_list),max(y_list))
return(x_extremum,y_extremum)

defget_spacing(level=16,zero=(32767,32767) ,x_extremum=(0,65535),y_extremum=(0,65535)):
x_temp_1=(zero[0]-x_extremum[0])//level
x_temp_2=(x_extremum[1]-zero[0] )//level
y_temp_1=(zero[1]-y_extremum[0])//level
y_temp_2=(y_extremum[1]-zero[1] )//level
x_spacing=(x_temp_1,x_temp_2)
y_spacing=(y_temp_1,y_temp_2)
return(x_spacing,y_spacing)

defget_coordinates(zero=(32767,32767),x_spacing=(2048,2048),y_spacing=(2048,2048)):
x_value=x_axis_pin.value-zero[0]
y_value=y_axis_pin.value-zero[1]
ifx_value>=0:
x_axis=x_value//x_spacing[1]
else:
x_axis=-((-x_value)//x_spacing[0])
ify_value>=0:
y_axis=y_value//y_spacing[1]
else:
y_axis=-((-y_value)//y_spacing[0])
return(x_axis,y_axis)

zero=get_zero(times=500,sleep=0.01)
print(zero)
(x_extremum,y_extremum)=get_extremum(times=500,sleep=0.01)
print((x_extremum,y_extremum))
(x_spacing,y_spacing)=get_spacing(level=128,zero=zero,x_extremum=x_extremum,y_extremum=y_extremum)
print((x_spacing,y_spacing))

whileTrue:
coordinates=get_coordinates(zero=zero,x_spacing=x_spacing,y_spacing=y_spacing)
print(coordinates)
time.sleep(0.1)

BPI-PicoW-S3 + CircuitPython 教程聚合链接：https://forum.banana-pi.org.cn/t/topic/3986?u=wind_

BPI-PicoW-S3 wiki 页面：https://wiki.banana-pi.org/BPI-PicoW-S3_开发板)

购买BPI-PicoW-S3：

• 比派科技官方速卖通店铺：https://www.aliexpress.com/item/1005004775634442.html

• SinoVoip 官方速卖通店铺：https://www.aliexpress.com/item/1005004775859077.html

• 官方淘宝店铺：https://item.taobao.com/item.htm?spm=a2126o.success.0.0.25b04831CHV1Nc&id=684134360199

• OEM&OEM 定制服务:sales@banana-pi.com