micropython-camera-driver
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lemariva
Bug in MicroPython I2C code
Trying to read from the I2C bus causes an ESP32 Guru Meditation Error:
i2c = machine.I2C(0, scl=machine.Pin(14), sda=machine.Pin(13)) i2c.scan() [64] i2c.readfrom_mem(64, 0, 2)
Guru Meditation Error: Core 1 panic'ed (StoreProhibited). Exception was unhandled.
Core 1 register dump: PC : 0x400869fc PS : 0x00060031 A0 : 0x80086bb2 A1 : 0x3ffb1190 A2 : 0x3ffe5998 A3 : 0x00000000 A4 : 0x00000000 A5 : 0x00000800 A6 : 0x3ffb4560 A7 : 0x3ffb4560 A8 : 0x3ffc4198 A9 : 0x00000901 A10 : 0x00060923 A11 : 0x00060920 A12 : 0x00000001 A13 : 0x3ffc419c A14 : 0x00000000 A15 : 0x3ff53000 SAR : 0x0000001e EXCCAUSE: 0x0000001d EXCVADDR: 0x00000008 LBEG : 0x4008d9a0 LEND : 0x4008d9bc LCOUNT : 0x00000000
Backtrace:0x400869f9:0x3ffb11900x40086baf:0x3ffb11d0 0x40083f85:0x3ffb1200 0x40089ea9:0x3ffca5e0 0x40091141:0x3ffca600 0x4012628b:0x3ffca640 0x40119b16:0x3ffca690 0x401169a9:0x3ffca6c0 0x40116a21:0x3ffca700 0x400e20bd:0x3ffca740 0x400e8819:0x3ffca770 0x400e8951:0x3ffca790 0x40085ca5:0x3ffca7b0 0x400e205a:0x3ffca850 0x400e8819:0x3ffca8b0 0x400e8842:0x3ffca8d0 0x40118bdd:0x3ffca8f0 0x40118f44:0x3ffca980 0x400f89c8:0x3ffca9c0
Apparently there is a bug in ESP32 SDK: https://forum.micropython.org/viewtopic.php?t=11330 Issue fixed and closed Mar 5 2022: https://github.com/espressif/esp-idf/issues/8548
New firmware build required.
I am seeing the same thing when I use machine.UART. I'd try building firmware, but I don't want to try and tackle the slew of errors I'm undoubtedly going to find. Have you built this fork successfully?
