【微雪RP2040双核开发板】使用MicroPython驱动LCD

北方

【微雪RP2040双核开发板】使用MicroPython驱动LCD [复制链接]

1、在使用C++和MicroPython上，多数都会使用MicroPython，基本上可以秒懂，秒会，秒上手。

出厂范例如下

2、首先安装Thonny，如上贴，在python安装好之后，只需要执行

pip install thonny

就可以的。然后再命令行直接键入

thonny

可以直接启动开发环境。

3、稍有些麻烦的就是驱动。这个开发板出厂是使用了C++的串口驱动，如果需要microPython解释器，就需要自定义并编译驱动，微雪提供了已经build的二进制文件。在编译的build目录下有多个二进制文件，适合拖曳方式的驱动是用uf2为后缀的文件。

首先，准备把RP2040进入boot模式。标准操作是按着boot键，然后上电，这里是把usb线插入电脑。然后，稍等，看windows自动搜寻到pico的外设并配置对应的驱动，然后就可以看到新增的驱动盘。然后把这个uf2文件直接拖曳到该目录，也就是执行一个copy的命令，就完成了驱动写入pico开发板的过程，

随后pico开发板自举重启，windows需要配置新的驱动，然后，就可以在thonny的右下角，找到新增的pico，这里是在COM5接口

自举后的开发板被识别为FS mode，应该是fast speed 模式，对应usb的FS模式，

4 执行范例代码

对应thonny的界面，开发不要太简单。上面的空间是执行程序块的，写入以py结尾的python文件，按照python的语法写代码，下面的是交互式解释器，就是一句一句的喂RP2040，直接反馈结果。

在上面的代码空间写入代码后，点击save，就提示要写在哪里，是本地计算机还是Raspberry Pico，如果写入Pico板，需要定义一个程序名，要用.py作为后缀，这样一加电就自动执行。这里的程序可以写入多个，从_main()_函数作为入口，自动启动，其他程序可以做为模块编写。

运行起来就是用图形化显示了运动传感器的数据。

显示成功。

附代码如下，‘

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([cmd]))
        self.cs(1)

    def write_data(self, buf):
        self.cs(1)
        self.dc(1)
        self.cs(0)
        self.spi.write(bytearray([buf]))
        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[0]
    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[0] << 8) + LSB[0]
    def _write_byte(self,cmd,val):
        self._bus.writeto_mem(int(self._address),int(cmd),bytes([int(val)]))
        
    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_8g  and 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=[0,0,0,0,0,0]
        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[2]<<16)|(raw_timestamp[1]<<8)|(raw_timestamp[0])
        for i in range(6):
            # xyz[i]=(raw_acc_xyz[(i*2)+1]<<8)|(raw_acc_xyz[i*2])
            # xyz[i+3]=(raw_gyro_xyz[((i+3)*2)+1]<<8)|(raw_gyro_xyz[(i+3)*2])
            xyz[i] = (raw_xyz[(i*2)+1]<<8)|(raw_xyz[i*2])
            if xyz[i] >= 32767:
                xyz[i] = xyz[i]-65535
        return xyz
    def Read_XYZ(self):
        xyz=[0,0,0,0,0,0]
        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[i]=raw_xyz[i]/acc_lsb_div#(acc_lsb_div/1000.0)
            xyz[i+3]=raw_xyz[i+3]*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[0]),20,100-3,LCD.white)
        LCD.text("ACC_Y={:+.2f}".format(xyz[1]),20,140-3,LCD.white)
        LCD.text("ACC_Z={:+.2f}".format(xyz[2]),20,180-3,LCD.white)

        LCD.fill_rect(120,80,120,120,0xF073)
        LCD.text("GYR_X={:+3.2f}".format(xyz[3]),125,100-3,LCD.white)
        LCD.text("GYR_Y={:+3.2f}".format(xyz[4]),125,140-3,LCD.white)
        LCD.text("GYR_Z={:+3.2f}".format(xyz[5]),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)

 

Jacktang

自举后的开发板被识别为FS mode，应该是fast speed 模式，这个是系统问题还是开发板识别问题呢

北方

Jacktang 发表于 2023-1-8 09:00 自举后的开发板被识别为FS mode，应该是fast speed 模式，这个是系统问题还是开发板识别问题呢

这个系统描述问题，应该还是可以正确识别的。后续正常。