Occasionally on boot, in wiced_int, the code hangs while initializing the WLAN core through the WWD interface. I do not know exactly where it hangs but i assume it is in the WWD thread context which blocks the monitor thread from kicking the watchdog, both are set to the highest priority. I have submitted this issue to an internal ticket and the only solution was to add/increase a delay before configuring the country code. The occurrence rate has dropped but it still occurs and triggers a WDT, potentially forcing the failsafe app to load the factory reset image. I occasionally see this happening on boot after an OTA and it is pretty frustrating because the firmware gets rolled back to a really old version that was placed in the factory reset at time of manufacturing... This is a real big issue in my application.
If this issue occurs i would rather perform a SW reset versus the watchdog. The only way i see to this this is to lower the WWD priority below the system monitor and use the monitor thread hooks around the wiced_init call. Currently the monitor thread and WWD use priority 9 (FreeRTOS). From what I see, nothing else in my system is running at priority 8... Thoughts?
SDK: 6.2
Processor: CYW43907
FreeRTOS build
With the default 6.2 SDK i was able to reproduce this on the CWY43907 eval board with the reset button. After 20 or 30 presses the system would watchdog on boot.
By the way, i diffed 6.2.1 and 6.2 WWD folders and nothing has changed in the newer SDK.
For Admins, this is in reference to Startup hangs occasionally - CYW43907, which has been locked.
Here is a console printout between a bad and good boot
Bad
Starting WICED vWiced_006.002.000.0072
Platform InVue_RTD initialised
Started FreeRTOS v9.0.0
Initialising LwIP v2.0.3
DHCP CLIENT hostname WICED IP
WWD SoC.43909 interface initializing with US/0
Reset wlan core..
load_wlan_fw: write reset_inst : 0xb83ef1b0
Release WLA
½É•¹.
Good
Starting WICED vWiced_006.002.000.0072
Platform InVue_RTD initialised
Started FreeRTOS v9.0.0
Initialising LwIP v2.0.3
DHCP CLIENT hostname WICED IP
WWD SoC.43909 interface initializing with US/0
Reset wlan core..
load_wlan_fw: write reset_inst : 0xb83ef1b0
Release WLA
½É•¹.
DMA: TX reclaim
read pkt , p0: 0x505120
read pkt , p0: 0x504a00
intstatus: 0x0, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x5042e0
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x503bc0
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x5034a0
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x502d80
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x502660
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x501f40
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x501820
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x501100
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x5009e0
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x5002c0
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x4ffba0
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x4ff480
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x4fed60
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x4fe640
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
intstatus: 0x1000000, NO PACKET
read pkt , p0: 0x4fdf20
read pkt , p0: 0x4fd800
293: Event (interface, type, status, reason): WWD_STA_INTERFACE Unknown WLC_E_STATUS_SUCCESS WLC_E_REASON_INITIAL_ASSOC
read pkt , p0: 0x4fd0e0
302: Event (interface, type, status, reason): WWD_STA_INTERFACE Unknown WLC_E_STATUS_SUCCESS WLC_E_REASON_INITIAL_ASSOC
intstatus: 0x0, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x4fc9c0
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x4fc2a0
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x505120
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x504a00
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x5042e0
intstatus: 0x10000, NO PACKET
WLAN MAC Address : CC:C0:79:DF:57:04
DMA: TX reclaim
read pkt , p0: 0x503bc0
intstatus: 0x10000, NO PACKET
WLAN Firmware : wl0: May 15 2018 19:39:17 version 7.15.168.114 (r689934) FWID 01-d6f88905
DMA: TX reclaim
read pkt , p0: 0x5034a0
intstatus: 0x10000, NO PACKET
WLAN CLM : API: 12.2 Data: 9.10.74 Compiler: 1.31.3 ClmImport: 1.36.3 Creation: 2018-05-15 19:33:15
DMA: TX reclaim
read pkt , p0: 0x502d80
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x502660
intstatus: 0x10000, NO PACKET
DMA: TX reclaim
read pkt , p0: 0x501f40
intstatus: 0x10000, NO PACKET
Init took ~403 ms
