Sparkfun ESP32 Thing

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  • Hi,
    I flashed a SparkFun ESP32 Thing with Espruino (specifically espruino_1v99_esp32.bin) however I just get junk out of it.

    If I reset I see the bootloader (I assume) print some stuff then I get junk eg..

    [Maelstrom 16:47] ~ >cu -l /dev/cu.usbserial-DN02MPA4 -s 115200
    Connected.
    ets Jun  8 2016 00:22:57
    
    rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
    ets Jun  8 2016 00:22:57
    
    rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
    configsip: 0, SPIWP:0xee
    clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_d­rv:0x00,hd_drv:0x00,wp_drv:0x00
    mode:DIO, clock div:2
    load:0x3fff0018,len:4
    load:0x3fff001c,len:2364
    load:0x40078000,len:0
    load:0x40078000,len:10880
    entry 0x40078c4c
    ���1Il���
    

    I tried a few different baud rates (9600, 19200, 38400, 57600, 115200, 230400, 921600) and none of them produced anything sensible except for the boot loader at 115200.

    Any help appreciated, thanks.

    BTW I flashed this board with MicroPython and it worked so I think the board is OK.

  • What flashing command did you use?

    If you used dio try qio or vice-versa..

    The baud rate to use is 115200.

    Sometimes after flashing you need to disconnect the USB and reconnect.

  • OK I used dio, like so..

    /Users/oconnd1/Documents/Arduino/hardwar­e/espressif/esp32/tools/esptool.py --chip esp32                                \
            --port /dev/cu.usbserial-DN02MPA4                         \
            --baud 921600                               \
            --after hard_reset write_flash              \
            -z                                          \
            --flash_mode dio                            \
            --flash_freq 40m                            \
            --flash_size detect                         \
            0x1000 bootloader.bin                       \
            0x8000 partitions_espruino.bin              \
            0x10000 espruino_1v99_esp32.bin
    

    Although I flashed MicroPython with..

    /Users/oconnd1/Documents/Arduino/hardwar­e/espressif/esp32/tools/esptool.py --chip esp32                                \
            --port /dev/cu.usbserial-DN02MPA4                         \
            --baud 921600                               \
            --after hard_reset write_flash              \
            -z                                          \
            --flash_mode dio                            \
            --flash_freq 40m                            \
            --flash_size detect                         \
            0x1000 ~/Downloads/esp32-20180808-v1.9.4-443-gc­1c798fbc.bin
    

    and that worked.

    I'll try qio tomorrow for Espruino tomorrow and see how I go, thanks.

  • If it's working with dio for micro python - then that's unlikely.

    Do a flash erase first - there might be something in flash left over that is giving you grief.

  • I realised I had an old-ish esptool so I updated, no change.

    I tried qio and that resulted in it rebooting constantly, eg

    rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
    configsip: 0, SPIWP:0xee
    clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_d­rv:0x00,hd_drv:0x00,wp_drv:0x00
    mode:QIO, clock div:3
    load:0x3fff0018,len:4
    load:0xd532060c,len:642933257
    1162 mmu set 00010000, pos 00010000
    1162 mmu set 00020000, pos 00020000
    1162 mmu set 00030000, pos 00030000
    1162 mmu set 00040000, pos 00040000
    1162 mmu set 00050000, pos 00050000
    1162 mmu set 00060000, pos 00060000
    1162 mmu set 00070000, pos 00070000
    1162 mmu set 00080000, pos 00080000
    1162 mmu set 00090000, pos 00090000
    ets Jun  8 2016 00:22:57
    
    rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
    configsip: 0, SPIWP:0xee
    clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_d­rv:0x00,hd_drv:0x00,wp_drv:0x00
    mode:QIO, clock div:3
    load:0x3fff0018,len:4
    load:0xd532060c,len:642933257
    1162 mmu set 00010000, pos 00010000
    1162 mmu set 00020000, pos 00020000
    1162 mmu set 00030000, pos 00030000
    1162 mmu set 00040000, pos 00040000
    1162 mmu set 00050000, pos 00050000
    1162 mmu set 00060000, pos 00060000
    1162 mmu set 00070000, pos 00070000
    1162 mmu set 00080000, pos 00080000
    ~1162 mmu set 00090000, pos 00090000
    ets Jun  8 2016 00:22:57
    

    I also tried lowering the SPI clock to 26MHz and doing and erase & reprogram but no dice.

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Sparkfun ESP32 Thing

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