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树莓派 python用GPIO模仿I2C,程序怎么写?

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悬赏园豆:200 [已关闭问题] 关闭于 2021-10-08 16:46

用树莓派读霍尔传感器(TLI493DA2B6HTSA1)的寄存器值,程序是在网上找大佬的移植过来的,但是跑起来老是会报错,请大佬帮我看下我究竟是哪里有问题,谢谢。
我想要读0x00~0x06寄存器的返回值,怎么读? GPIO设定的pin为 SDA=GPIO3,SCL=GPIO5

from smbus2 import SMBus
import time
import RPi.GPIO as GPIO

PUD_DICT = {
2:GPIO.PUD_OFF,
0:GPIO.PUD_UP,
1:GPIO.PUD_DOWN
}

class Rpi:

def _init_(self,*args,**kwargs):
    GPIO.setmode(GPIO.BOARD)
    
def config_pin(self,*args,**kwargs):
    pin = kwargs["pin"]
    level = kwargs["level"]
    direct = kwargs["direct"]
    pull_up_down = kwargs.get("pud",None)
    if direct == 0:
        GPIO.setup(pin,GPIO.IN)
        
    elif direct == 1:
        GPIO.setup(pin,GPIO.OUT)
        GPIO.OUT(pin,level)
        
    if not pull_up_down:
        GPIO.setup(pin,GPIO.IN,pull_up_down=PUD_DICT[pull_up_down])

def get_pin_status(self,pin):
    return {"level":GPIO.input(pin)}

class SoftwareI2C:

def _init_(self,scl_pin,sda_pin):
    self._board = Rpi()
    self.scl_pin = scl_pin
    self.sda_pin = sda_pin
    self.i2c_delay = 100
        
    self._board_config_pin(pin=self.scl_pin,direct=0,pud=0)
    self._board_config_pin(pin=self.scl_pin,direct=0,pud=0)
    
def wait_microseconds(self,duration):
    begin_time = datetime.datetime.now()
    while True:
        end_time = datetime.datetime.now() 
        d_time = end_time.microsecond - begin_time.microsecond
        if d_time > duration:
            break
        
def pull(self,pin):
    self._board.config_pin(pin,direct=1,level=0)
    self.wait_microseconds(self.i2c_delay)
    
def release(self,pin):
    self._board.config_pin(pin,direct=1,level=1)
    self.wait_microseconds(self.i2c_delay)
    
def release_wait(self,pin):
    """ direct=1,level=1)"""
    while not self.get_pin_status(pin)["level"]:
        self.wait_microseconds(self.i2c_delay)
    self.wait_microseconds(self.i2c_delay)
    
def start(self):
    self.release(self.sda_pin)
    self.release_wait(self.scl_pin)
    self.pull(self.sda_pin)
    self.pull(self.scl_pin)
    
def stop(self):
    self.pull(self.sda_pin)
    self.pull(self.scl_pin)
    self.wait_microseconds(self.i2c_delay)
    
    self.release(self.scl_pin)
    self.wait_microseconds(self.i2c_delay)
    self.release(self.sda_pin)

def send_bit(self,bit):
    if bit:
        self.release(self.sda_pin)
    else:
        self.pull(self.sda_pin)
    
    self.release_wait(self.scl_pin)
    self.pull(self.scl_pin)
    
    self.pull(self.sda_pin)
    
def read_bit(self):
    self.release(self.sda_pin)
    self._board.config_pin(self.sda_pin,direct=0,level=1)
    self.release_wait(self.scl_pin)
    bit = self._board.get_pin_status(self.sda_pin)["level"]
    self.pull(self.scl_pin)
    self.pull(self.sda_pin)
    return bit

def send_byte(self,byte):
    for i in range(8):
        self.send_bit(byte & 0x80)
        byte = byte << 1
    
    self.read_bit()
     
def read_byte(self):
    byte = 0x00
    for i in range(8):
        byte = (byte<<1) | self.read_bit()
    self.read_bit()
    return byte

3D Hall sensor(TLI493DA2B6HTSA1) write and read

sw_i2c = SoftwareI2C()

Write 0x88 0x19 to reg0x10

sw_i2c.start()
sw_i2c.send_byte(0x35<<1|0x00)
sw_i2c.send_byte(0x10)
sw_i2c.send_byte(0x88)
sw_i2c.send_byte(0x19)
sw_i2c.stop()
time.sleep()

Read data from 0x00-0x06

sw_i2c.start()
sw_i2c.send_byte(0x35<<1|0x00)
sw_i2c.send_byte(0x20)
sw_i2c.start()
sw_i2c.send_byte(0x35<<1|0x01)
print(sw_i2c.read_byte())
print(sw_i2c.read_byte())
print(sw_i2c.read_byte())
sw_i2c.stop()

Delusion乄的主页 Delusion乄 | 菜鸟二级 | 园豆:202
提问于:2021-09-08 17:11
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