Flashed micropython, but the ESP32 keeps rebooting.

[zhenghaku]

dear everyone,
I wanted to use the micropython as an embedded lib. I managed to build a ESP32 port of MP into a static .a file and linked it to my ESP32 firmware.
But when I flashed it, the board keeps rebooting. I don't have a debugger, so I try to commented out lines of code to see which line caused the rebooting.

In my main function I called the follwoing:

Code: Select all

#define MP_TASK_STACK_SIZE (16 * 1024)
void mp_start()
{
    size_t mp_task_heap_size = heap_caps_get_largest_free_block(MALLOC_CAP_8BIT);
    void *mp_task_heap = malloc(mp_task_heap_size);

    volatile uint32_t sp = (uint32_t)get_sp();
    mp_stack_set_top((void *)sp);
    // Initialized stack limit
    mp_stack_set_limit(MP_TASK_STACK_SIZE - 1024);
    // Initialize heap
    gc_init(mp_task_heap, mp_task_heap + mp_task_heap_size);
    // Initialize interpreter
    mp_init();
} 

If I commented out mp_stack_set_limit(MP_TASK_STACK_SIZE - 1024); and mp_stack_set_limit(MP_TASK_STACK_SIZE - 1024); and everything below, the board won't reboot. If everything else is commented, only either of those 2 lines presented, the board will infinitely reboot.

the printed message before rebooting is like:

Code: Select all

Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x400ded2e  PS      : 0x00060330  A0      : 0x800d1072  A1      : 0x3ffbbb70
A2      : 0x3ffbbb90  A3      : 0x3f400148  A4      : 0x3f400324  A5      : 0x0000031e
A6      : 0x3f400148  A7      : 0x3f40036c  A8      : 0x800ded2e  A9      : 0x3ffbbb50
A10     : 0x00000000  A11     : 0x00000004  A12     : 0x00000000  A13     : 0x0000001f
A14     : 0x00000001  A15     : 0x00000005  SAR     : 0x00000004  EXCCAUSE: 0x0000001d
EXCVADDR: 0x00000000  LBEG    : 0x4000c46c  LEND    : 0x4000c477  LCOUNT  : 0x00000000

ELF file SHA256: 2f5dd82114682226

Backtrace: 0x400ded2b:0x3ffbbb70 0x400d106f:0x3ffbbb90 0x400d104e:0x3ffbbbc0 0x400d99ca:0x3ffbbbe0 0x4008cd59:0x3ffbbc00

Rebooting...
ets Jun  8 2016 00:22:57

does anyone knows what mistake was I making?