【微雪 RP2040双核开发板】电路分析与python开发环境

jinyi7016 发表于 2022-11-20 15:17

<div class='showpostmsg'> 本帖最后由 jinyi7016 于 2022-11-20 15:19 编辑

收到微雪 RP2040双核开发板 ，包装一个小盒子，没有其他配置，只有一块开发板，简洁的很。

从原理图上看，开发板的资源是一些比较基本的外设，有IMU是一个六轴，但并不是一体的六轴芯片，而是两个三轴组合的。其中一个芯片还是比较大的封装的，占用了不少PCB面积。可能是为了降低成本吧。

Flash从原理图上看是W25Q32。

电源部分有三组，一个1.8V，一个3.3V，一个电池芯片。

 



开发板上没有电源指示灯，插上USB后，过一会儿才会亮屏，担心以为是板子有问题呢。

其实开发板上的阻容是0201的，还有不少的面积，添加个电源LED或是用户LED还是可以放得下的。

引出的排座是1.27mm间隔的，这个间隔平时用的就很少，当然也不可能是一些通用的接口了，所以，要接扩展的话，就比较麻烦了。

 

去micropython下载RP2040的固件：

<a href="https://micropython.org/download/rp2-pico/rp2-pico-latest.uf2">https://micropython.org/download/rp2-pico/rp2-pico-latest.uf2</a>

 

按住开发板上的boot按键，再插上USB接口，电脑上会多出来一个RPI-RP2的盘符，将下载的固件，复制到这个盘符里后，开发板将会重新启动，这个固件就算是烧写好了。





软件使用Thonny进行开发

下载安装即可。

下载地址：

<a href="https://thonny.org/">https://thonny.org/</a>

打开Thonny，插上开发板，在右下角选择micropython(Raspberry Pi Pico)

 



之后，可以新建一个py文件，或是打开一个已经有的python代码文件。

 

直接点运行，即可在开发板上运行相应的程序。



运行一下官方提供的LCD的例程。

 

<pre>
<code class="language-python">from machine import Pin,I2C,SPI,PWM,ADC
import framebuf
import time

I2C_SDA = 6
I2C_SDL = 7

DC = 8
CS = 9
SCK = 10
MOSI = 11
RST = 12

BL = 25

Vbat_Pin = 29

class LCD_1inch28(framebuf.FrameBuffer):
def __init__(self):
 self.width = 240
 self.height = 240

 self.cs = Pin(CS,Pin.OUT)
 self.rst = Pin(RST,Pin.OUT)

 self.cs(1)
 self.spi = SPI(1,100_000_000,polarity=0, phase=0,sck=Pin(SCK),mosi=Pin(MOSI),miso=None)
 self.dc = Pin(DC,Pin.OUT)
 self.dc(1)
 self.buffer = bytearray(self.height * self.width * 2)
 super().__init__(self.buffer, self.width, self.height, framebuf.RGB565)
 self.init_display()

 self.red = 0x07E0
 self.green = 0x001f
 self.blue= 0xf800
 self.white = 0xffff

 self.fill(self.white)
 self.show()

 self.pwm = PWM(Pin(BL))
 self.pwm.freq(5000)

def write_cmd(self, cmd):
 self.cs(1)
 self.dc(0)
 self.cs(0)
 self.spi.write(bytearray())
 self.cs(1)

def write_data(self, buf):
 self.cs(1)
 self.dc(1)
 self.cs(0)
 self.spi.write(bytearray())
 self.cs(1)
def set_bl_pwm(self,duty):
 self.pwm.duty_u16(duty)#max 65535
def init_display(self):
 """Initialize dispaly"""
 self.rst(1)
 time.sleep(0.01)
 self.rst(0)
 time.sleep(0.01)
 self.rst(1)
 time.sleep(0.05)

 self.write_cmd(0xEF)
 self.write_cmd(0xEB)
 self.write_data(0x14)

 self.write_cmd(0xFE)
 self.write_cmd(0xEF)

 self.write_cmd(0xEB)
 self.write_data(0x14)

 self.write_cmd(0x84)
 self.write_data(0x40)

 self.write_cmd(0x85)
 self.write_data(0xFF)

 self.write_cmd(0x86)
 self.write_data(0xFF)

 self.write_cmd(0x87)
 self.write_data(0xFF)

 self.write_cmd(0x88)
 self.write_data(0x0A)

 self.write_cmd(0x89)
 self.write_data(0x21)

 self.write_cmd(0x8A)
 self.write_data(0x00)

 self.write_cmd(0x8B)
 self.write_data(0x80)

 self.write_cmd(0x8C)
 self.write_data(0x01)

 self.write_cmd(0x8D)
 self.write_data(0x01)

 self.write_cmd(0x8E)
 self.write_data(0xFF)

 self.write_cmd(0x8F)
 self.write_data(0xFF)

 self.write_cmd(0xB6)
 self.write_data(0x00)
 self.write_data(0x20)

 self.write_cmd(0x36)
 self.write_data(0x98)

 self.write_cmd(0x3A)
 self.write_data(0x05)

 self.write_cmd(0x90)
 self.write_data(0x08)
 self.write_data(0x08)
 self.write_data(0x08)
 self.write_data(0x08)

 self.write_cmd(0xBD)
 self.write_data(0x06)

 self.write_cmd(0xBC)
 self.write_data(0x00)

 self.write_cmd(0xFF)
 self.write_data(0x60)
 self.write_data(0x01)
 self.write_data(0x04)

 self.write_cmd(0xC3)
 self.write_data(0x13)
 self.write_cmd(0xC4)
 self.write_data(0x13)

 self.write_cmd(0xC9)
 self.write_data(0x22)

 self.write_cmd(0xBE)
 self.write_data(0x11)

 self.write_cmd(0xE1)
 self.write_data(0x10)
 self.write_data(0x0E)

 self.write_cmd(0xDF)
 self.write_data(0x21)
 self.write_data(0x0c)
 self.write_data(0x02)

 self.write_cmd(0xF0)
 self.write_data(0x45)
 self.write_data(0x09)
 self.write_data(0x08)
 self.write_data(0x08)
 self.write_data(0x26)
 self.write_data(0x2A)

 self.write_cmd(0xF1)
 self.write_data(0x43)
 self.write_data(0x70)
 self.write_data(0x72)
 self.write_data(0x36)
 self.write_data(0x37)
 self.write_data(0x6F)

 self.write_cmd(0xF2)
 self.write_data(0x45)
 self.write_data(0x09)
 self.write_data(0x08)
 self.write_data(0x08)
 self.write_data(0x26)
 self.write_data(0x2A)

 self.write_cmd(0xF3)
 self.write_data(0x43)
 self.write_data(0x70)
 self.write_data(0x72)
 self.write_data(0x36)
 self.write_data(0x37)
 self.write_data(0x6F)

 self.write_cmd(0xED)
 self.write_data(0x1B)
 self.write_data(0x0B)

 self.write_cmd(0xAE)
 self.write_data(0x77)

 self.write_cmd(0xCD)
 self.write_data(0x63)

 self.write_cmd(0x70)
 self.write_data(0x07)
 self.write_data(0x07)
 self.write_data(0x04)
 self.write_data(0x0E)
 self.write_data(0x0F)
 self.write_data(0x09)
 self.write_data(0x07)
 self.write_data(0x08)
 self.write_data(0x03)

 self.write_cmd(0xE8)
 self.write_data(0x34)

 self.write_cmd(0x62)
 self.write_data(0x18)
 self.write_data(0x0D)
 self.write_data(0x71)
 self.write_data(0xED)
 self.write_data(0x70)
 self.write_data(0x70)
 self.write_data(0x18)
 self.write_data(0x0F)
 self.write_data(0x71)
 self.write_data(0xEF)
 self.write_data(0x70)
 self.write_data(0x70)

 self.write_cmd(0x63)
 self.write_data(0x18)
 self.write_data(0x11)
 self.write_data(0x71)
 self.write_data(0xF1)
 self.write_data(0x70)
 self.write_data(0x70)
 self.write_data(0x18)
 self.write_data(0x13)
 self.write_data(0x71)
 self.write_data(0xF3)
 self.write_data(0x70)
 self.write_data(0x70)

 self.write_cmd(0x64)
 self.write_data(0x28)
 self.write_data(0x29)
 self.write_data(0xF1)
 self.write_data(0x01)
 self.write_data(0xF1)
 self.write_data(0x00)
 self.write_data(0x07)

 self.write_cmd(0x66)
 self.write_data(0x3C)
 self.write_data(0x00)
 self.write_data(0xCD)
 self.write_data(0x67)
 self.write_data(0x45)
 self.write_data(0x45)
 self.write_data(0x10)
 self.write_data(0x00)
 self.write_data(0x00)
 self.write_data(0x00)

 self.write_cmd(0x67)
 self.write_data(0x00)
 self.write_data(0x3C)
 self.write_data(0x00)
 self.write_data(0x00)
 self.write_data(0x00)
 self.write_data(0x01)
 self.write_data(0x54)
 self.write_data(0x10)
 self.write_data(0x32)
 self.write_data(0x98)

 self.write_cmd(0x74)
 self.write_data(0x10)
 self.write_data(0x85)
 self.write_data(0x80)
 self.write_data(0x00)
 self.write_data(0x00)
 self.write_data(0x4E)
 self.write_data(0x00)

 self.write_cmd(0x98)
 self.write_data(0x3e)
 self.write_data(0x07)

 self.write_cmd(0x35)
 self.write_cmd(0x21)

 self.write_cmd(0x11)
 time.sleep(0.12)
 self.write_cmd(0x29)
 time.sleep(0.02)

 self.write_cmd(0x21)

 self.write_cmd(0x11)

 self.write_cmd(0x29)

def show(self):
 self.write_cmd(0x2A)
 self.write_data(0x00)
 self.write_data(0x00)
 self.write_data(0x00)
 self.write_data(0xef)

 self.write_cmd(0x2B)
 self.write_data(0x00)
 self.write_data(0x00)
 self.write_data(0x00)
 self.write_data(0xEF)

 self.write_cmd(0x2C)

 self.cs(1)
 self.dc(1)
 self.cs(0)
 self.spi.write(self.buffer)
 self.cs(1)

class QMI8658(object):
def __init__(self,address=0X6B):
 self._address = address
 self._bus = I2C(id=1,scl=Pin(I2C_SDL),sda=Pin(I2C_SDA),freq=100_000)
 bRet=self.WhoAmI()
 if bRet :
 self.Read_Revision()
 else :
 return NULL
 self.Config_apply()

def _read_byte(self,cmd):
 rec=self._bus.readfrom_mem(int(self._address),int(cmd),1)
 return rec
def _read_block(self, reg, length=1):
 rec=self._bus.readfrom_mem(int(self._address),int(reg),length)
 return rec
def _read_u16(self,cmd):
 LSB = self._bus.readfrom_mem(int(self._address),int(cmd),1)
 MSB = self._bus.readfrom_mem(int(self._address),int(cmd)+1,1)
 return (MSB << 8) + LSB
def _write_byte(self,cmd,val):
 self._bus.writeto_mem(int(self._address),int(cmd),bytes())

def WhoAmI(self):
 bRet=False
 if (0x05) == self._read_byte(0x00):
 bRet = True
 return bRet
def Read_Revision(self):
 return self._read_byte(0x01)
def Config_apply(self):
 # REG CTRL1
 self._write_byte(0x02,0x60)
 # REG CTRL2 : QMI8658AccRange_8gand QMI8658AccOdr_1000Hz
 self._write_byte(0x03,0x23)
 # REG CTRL3 : QMI8658GyrRange_512dps and QMI8658GyrOdr_1000Hz
 self._write_byte(0x04,0x53)
 # REG CTRL4 : No
 self._write_byte(0x05,0x00)
 # REG CTRL5 : Enable Gyroscope And Accelerometer Low-Pass Filter
 self._write_byte(0x06,0x11)
 # REG CTRL6 : Disables Motion on Demand.
 self._write_byte(0x07,0x00)
 # REG CTRL7 : Enable Gyroscope And Accelerometer
 self._write_byte(0x08,0x03)

def Read_Raw_XYZ(self):
 xyz=
 raw_timestamp = self._read_block(0x30,3)
 raw_acc_xyz=self._read_block(0x35,6)
 raw_gyro_xyz=self._read_block(0x3b,6)
 raw_xyz=self._read_block(0x35,12)
 timestamp = (raw_timestamp<<16)|(raw_timestamp<<8)|(raw_timestamp)
 for i in range(6):
 # xyz=(raw_acc_xyz[(i*2)+1]<<8)|(raw_acc_xyz)
 # xyz=(raw_gyro_xyz[((i+3)*2)+1]<<8)|(raw_gyro_xyz[(i+3)*2])
 xyz = (raw_xyz[(i*2)+1]<<8)|(raw_xyz)
 if xyz >= 32767:
 xyz = xyz-65535
 return xyz
def Read_XYZ(self):
 xyz=
 raw_xyz=self.Read_Raw_XYZ()
 #QMI8658AccRange_8g
 acc_lsb_div=(1<<12)
 #QMI8658GyrRange_512dps
 gyro_lsb_div = 64
 for i in range(3):
 xyz=raw_xyz/acc_lsb_div#(acc_lsb_div/1000.0)
 xyz=raw_xyz*1.0/gyro_lsb_div
 return xyz

if __name__=='__main__':

LCD = LCD_1inch28()
LCD.set_bl_pwm(65535)
qmi8658=QMI8658()
Vbat= ADC(Pin(Vbat_Pin))

while(True):
 #read QMI8658
 xyz=qmi8658.Read_XYZ()

 LCD.fill(LCD.white)

 LCD.fill_rect(0,0,240,40,LCD.red)
 LCD.text("RP2040-LCD-1.28",60,25,LCD.white)

 LCD.fill_rect(0,40,240,40,LCD.blue)
 LCD.text("Waveshare",80,57,LCD.white)

 LCD.fill_rect(0,80,120,120,0x1805)
 LCD.text("ACC_X={:+.2f}".format(xyz),20,100-3,LCD.white)
 LCD.text("ACC_Y={:+.2f}".format(xyz),20,140-3,LCD.white)
 LCD.text("ACC_Z={:+.2f}".format(xyz),20,180-3,LCD.white)

 LCD.fill_rect(120,80,120,120,0xF073)
 LCD.text("GYR_X={:+3.2f}".format(xyz),125,100-3,LCD.white)
 LCD.text("GYR_Y={:+3.2f}".format(xyz),125,140-3,LCD.white)
 LCD.text("GYR_Z={:+3.2f}".format(xyz),125,180-3,LCD.white)

 LCD.fill_rect(0,200,240,40,0x180f)
 reading = Vbat.read_u16()*3.3/65535*2
 LCD.text("Vbat={:.2f}".format(reading),80,215,LCD.white)

 LCD.show()
 time.sleep(0.1)

</code></pre>

效果如下：

 





 

 

 



 


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dcexpert 发表于 2022-11-20 19:45

开发板看起来不错，使用python也很方便

azcazc 发表于 2022-11-21 14:18

看起来还可以，楼主多多更新，让我学习一下。

大涂涂 发表于 2022-11-23 11:16

遗憾没中签，。。。。

大涂涂 发表于 2022-11-23 11:17

对这个圆形屏感兴趣

jinyi7016 发表于 2022-11-25 14:45

大涂涂发表于 2022-11-23 11:17
对这个圆形屏感兴趣

也是看中这个圆屏才申请的

piazini 发表于 2023-1-24 12:39

长见识了，用python 也能开发。

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【微雪 RP2040双核开发板】电路分析与python开发环境