BLE woes ?

[duffo64]

Hello All,

First post (and first lopy adventure).
It's better to tell now that I am a noob about python (working normally in C/C++ with Particle Photons and RedBear Duos), but I kickstarted lopy and here I am. So please forgive me if I write stupid or obvious things.

I wrote a simple program to sniff ble advertisers around, and it works. But between the 200th and 300th iteration lopy hangs with

Guru Meditation Error of type StoreProhibited occurred on core 0. Exception was unhandled.

Am I doing something of terribly wrong here ? Thanks !

from network import Bluetooth
import binascii
import gc

gc.enable()
bt = Bluetooth()

times = 0

bt.start_scan(5)
while True:
    while bt.isscanning():
        adv = bt.get_adv()

        if adv:
            name = bt.resolve_adv_data(adv.data,  bt.ADV_NAME_CMPL)

            if name:
               print("%s %s %s" % (binascii.hexlify(adv.mac),  name,  binascii.hexlify(bt.resolve_adv_data(adv.data,  bt.ADV_MANUFACTURER_DATA))))
    
    times += 1
    alloc = gc.mem_alloc()
    free  = gc.mem_free()
    print("lap %d heap %d free %d" % (times,  alloc, free))
    bt.start_scan(5)

[abilio]

@duffo64, in order to help you out, we're going to need the firmware version number, and also a copy of the Guru Meditation Error dump (with all the registers) would be fine. Thanks in advance

[duffo64]

Thanks @abilio,

and sorry for this. Firmware is the latest 1.2.2.b1
If you see, my program prints logs (from 163 thru 168) losing all advertisements, and then Guru appears:

lap 163 heap 32944 free 15056
lap 164 heap 33024 free 14976
lap 165 heap 33104 free 14896
lap 166 heap 33184 free 14816
lap 167 heap 33264 free 14736
lap 168 heap 33344 free 14656
Guru Meditation Error of type StoreProhibited occurred on core  0. Exception was unhandled.
Register dump:
PC      : 0x4017b452  PS      : 0x00060d30  A0      : 0x8017b476  A1      : 0x3fffc450  
A2      : 0x000002a4  A3      : 0x00060f23  A4      : 0x00060f23  A5      : 0xb33f0000  
A6      : 0xb33fffff  A7      : 0x00000001  A8      : 0x00000001  A9      : 0x3fffc430  
A10     : 0x00000000  A11     : 0x000002b0  A12     : 0x40081684  A13     : 0x3fff8af0  
A14     : 0x00000001  A15     : 0x3ffc3590  SAR     : 0x00000013  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x00000005  LBEG    : 0x4000c2e0  LEND    : 0x4000c2f6  LCOUNT  : 0x00000000  

Backtrace: 0x4017b452:0x3fffc450 0x4017b476:0x3fffc470 0x4016c3a0:0x3fffc490 0x4015c9e1:0x3fffc4b0 0x40188d3d:0x3fffc4dets Jun  8 2016 00:22:57

rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:QIO, clock div:2
load:0x3fff9010,len:8
load:0x3fff9018,len:248
load:0x40078000,len:4072
load:0x4009f000,len:940
entry 0x4009f1ec

[abilio]

@duffo64, thanks a lot for your report. We will check into it.