Ryan Malloy
bbdcb243dc
Apply .gitattributes normalization to convert all CRLF line endings inherited from Windows-origin source files to Unix LF. 175 files, zero content changes.
102 lines
3.3 KiB
Python
102 lines
3.3 KiB
Python
#!/usr/bin/env python3
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"""Probe I2C EEPROM address setting on Genpix SkyWalker-1."""
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import usb.core, usb.util, time
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dev = usb.core.find(idVendor=0x09C0, idProduct=0x0203)
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for cfg in dev:
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for intf in cfg:
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if dev.is_kernel_driver_active(intf.bInterfaceNumber):
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dev.detach_kernel_driver(intf.bInterfaceNumber)
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break
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try:
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dev.set_configuration()
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except:
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pass
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I2C_READ = 0x84
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I2C_WRITE = 0x83
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def vin(req, value=0, index=0, length=64):
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try:
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return dev.ctrl_transfer(
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usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_IN,
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req, value, index, length, 2000)
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except:
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return None
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def vout(req, value=0, index=0, data=b''):
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try:
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return dev.ctrl_transfer(
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usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_OUT,
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req, value, index, data, 2000)
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except Exception as e:
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print(f" OUT error: {e}")
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return None
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# Known first 8 bytes at offset 0: c2 c0 09 03 02 00 00 40
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# Known bytes at offset 8 (from our read): 03 ff 00 00 02 18 8d 30
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REF_0 = "c2 c0 09 03 02 00 00 40"
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REF_8 = "03 ff 00 00 02 18 8d 30"
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def show(label, data):
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if data is not None:
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h = bytes(data[:8]).hex(' ')
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match = ""
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if h == REF_0: match = " <-- OFFSET 0"
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elif h == REF_8: match = " <-- OFFSET 8"
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print(f" {label}: {h}{match}")
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else:
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print(f" {label}: FAILED")
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print("=== Approach 1: I2C_WRITE data=[addr_h, addr_l], then I2C_READ ===")
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vout(I2C_WRITE, 0x51, 0, bytes([0x00, 0x08]))
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show("After set 0x0008", vin(I2C_READ, 0x51, 0, 8))
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vout(I2C_WRITE, 0x51, 0, bytes([0x00, 0x00]))
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show("After set 0x0000", vin(I2C_READ, 0x51, 0, 8))
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print("\n=== Approach 2: wValue=addr, wIndex=slave ===")
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vout(I2C_WRITE, 0x0008, 0x51)
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show("After set 0x0008", vin(I2C_READ, 0x51, 0, 8))
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vout(I2C_WRITE, 0x0000, 0x51)
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show("After set 0x0000", vin(I2C_READ, 0x51, 0, 8))
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print("\n=== Approach 3: wValue=slave, wIndex=addr ===")
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vout(I2C_WRITE, 0x51, 0x0008)
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show("After set 0x0008", vin(I2C_READ, 0x51, 0, 8))
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vout(I2C_WRITE, 0x51, 0x0000)
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show("After set 0x0000", vin(I2C_READ, 0x51, 0, 8))
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print("\n=== Approach 4: I2C_READ with wIndex=offset ===")
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show("wIndex=0x0000", vin(I2C_READ, 0x51, 0x0000, 8))
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show("wIndex=0x0008", vin(I2C_READ, 0x51, 0x0008, 8))
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show("wIndex=0x0040", vin(I2C_READ, 0x51, 0x0040, 8))
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print("\n=== Approach 5: I2C_READ with (slave<<8|offset) in wValue ===")
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show("wValue=0x5100", vin(I2C_READ, 0x5100, 0, 8))
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show("wValue=0x5108", vin(I2C_READ, 0x5108, 0, 8))
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print("\n=== Approach 6: I2C_READ with wValue=offset (no slave) ===")
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show("wValue=0x0000", vin(I2C_READ, 0x0000, 0, 8))
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show("wValue=0x0008", vin(I2C_READ, 0x0008, 0, 8))
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show("wValue=0x0040", vin(I2C_READ, 0x0040, 0, 8))
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print("\n=== Approach 7: Larger reads to check page boundaries ===")
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data = vin(I2C_READ, 0x51, 0, 64)
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if data:
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show("First 8 of 64", data[:8])
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show("Bytes 8-15", data[8:16])
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show("Bytes 56-63", data[56:64])
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# Check if bytes 8-15 match REF_8
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if bytes(data[8:16]).hex(' ') == REF_8:
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print(" ** Bytes 8-15 match expected offset 8 data!")
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print(" ** The 64-byte read IS returning sequential EEPROM data!")
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# Reattach
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for cfg in dev:
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for intf in cfg:
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try:
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usb.util.release_interface(dev, intf.bInterfaceNumber)
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dev.attach_kernel_driver(intf.bInterfaceNumber)
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except:
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pass
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