Error code in a SPI camera connected to raspberry pi - micropython code - micropython

Question

I've got the following code:
import machine
import time as utime
from OV5642_reg import *
OV5642=1
BMP =0
JPEG=1
RAW =2
OV5642_CHIPID_HIGH=0x300a
OV5642_CHIPID_LOW=0x300b
class ArducamClass(object):
def __init__(self,Type):
self.CameraMode=JPEG
self.CameraType=Type
self.SPI_CS = machine.Pin(5, mode=machine.Pin.OUT, value=1)
self.I2cAddress=0x3c
self.spi = machine.SPI(0, baudrate=4000000,polarity=0,phase=0,bits=8, sck=machine.Pin(2), mosi=machine.Pin(3), miso=machine.Pin(4))
self.i2c = machine.I2C(0, scl=machine.Pin(9), sda=machine.Pin(8), freq=1000000)
print(self.i2c.scan())
self.Spi_write(0x07,0x80)
utime.sleep(0.1)
self.Spi_write(0x07,0x00)
utime.sleep(0.1)
def Camera_Detection(self):
while True:
if self.CameraType==OV5642:
self.I2cAddress=0x3c
self.wrSensorReg16_8(0xff,0x01)
id_h=self.rdSensorReg16_8(OV5642_CHIPID_HIGH)
id_l=self.rdSensorReg16_8(OV5642_CHIPID_LOW)
if((id_h==0x56)and(id_l==0x42)):
print('CameraType is OV5642')
break
else:
print('Can\'t find OV5642 module')
utime.sleep(1)
def Set_Camera_mode(self,mode):
self.CameraMode=mode
def wrSensorReg16_8(self,addr,val):
buffer=bytearray(3)
buffer[0]=(addr>>8)&0xff
buffer[1]=addr&0xff
buffer[2]=val
self.iic_write(buffer)
def rdSensorReg16_8(self,addr):
buffer=bytearray(2)
rt=bytearray(1)
buffer[0]=(addr>>8)&0xff
buffer[1]=addr&0xff
self.iic_write(buffer)
self.iic_readinto(rt)
return rt[0]
def iic_write(self, buf, *, start=0, end=None):
if end is None:
end = len(buf)
self.i2c.writeto(self.I2cAddress, buf[start:end])
def iic_readinto(self, buf, *, start=0, end=None):
if end is None:
end = len(buf)
print(buf[start:end])
print(self.I2cAddress)
self.i2c.readfrom_into(self.I2cAddress, buf[start:end])
def Spi_write(self,address,value):
maskbits = 0x80
buffer=bytearray(2)
buffer[0]=address | maskbits
buffer[1]=value
self.SPI_CS.value(0)
self.spi_write(buffer)
self.SPI_CS.value(1)
def spi_write(self, buf, *, start=0, end=None):
if end is None:
end = len(buf)
self.spi.write(buf[start:end])
mycam = ArducamClass(OV5642)
mycam.Camera_Detection()
Which gives me the following error:
Traceback (most recent call last):
File "<stdin>", line 89, in <module>
File "<stdin>", line 33, in Camera_Detection
File "<stdin>", line 58, in rdSensorReg16_8
File "<stdin>", line 71, in iic_readinto
OSError: [Errno 5] EIO
I'm sure that the camera is connected correctly (I've tested it using the standard CircuitPython code provided with it and it works) so I think that I'm misinterpreting how the readfrom_into call works... any hint?
I tried to understand what get's written in the readfrom_into part but can't get anything.. The starting code (based on circuitpython) is here: https://github.com/ArduCAM/PICO_SPI_CAM/blob/master/Python/Arducam.py