Add source code for sdk_wifi_param_save_protect() and a compile time,
WIFI_PARAM_SAVE, option to skip writing the wifi state to flash. This
avoids wear on the flash and does not appear to be necessary when the
app initializes the state anyway.
Define WIFI_PARAM_SAVE to 0 for the wificfg example.
If `sdk_ets_timer_arm_ms_us` is called right after `vPortExitCritical` inside `sdk_ets_timer_disarm` on line 247 (by an ISR for example, which was my case), execution will loop forever on line 196, since `timer->next!=ETS_TIMER_NOT_ARMED`, which was supposed to be changed in line 248.
By delaying the IRS or context switch until `sdk_ets_timer_disarm` the problem is fixed.
* The mdns responder has been reworked to lower stack and memory usage. This is
a variation on the upstream code, it use malloc whereas the upstream code uses
pools. The high stack usage of the mdns responder was problem for
esp-open-rtos, so we might have to maintain the differences for now.
* Improved lwip core locking, and lock checking. Upstream improvements, that
need some added support from esp-open-rtos specific code. More core lock is
performed when calling from the esp-open-rtos code now, so a little safer. The
checking is not enforced, but projects might see warning messages and might
want to look into them.
* The esp-open-rtos lwip support has been sync'ed with the new freertos port
included with lwip. There are still some minor differences.
* A few lwip timer bugs have been resolved. This might help resolve some issues.
* Plus it picks up all the other upstream fixes and improvements.
* The default lwip stack has been lowered from 768 words to 480 words,
due to the reduced stack usage by the mdns responder.
Multicast frames were being dropped by ieee80211_output_pbuf. It appears to look
up the destination address using cnx_node_search which only has an entry for the
broadcast address (all ones). This patch modifies cnx_node_search to return the
broadcast cnx_node for the multicast addresses too.
This is needed to support services such as mDNS on the softap interface.
Also adds source code for sdk_cnx_rc_search, adding a null pointer dereference
check (that is not expected to be seen), and source code for sdk_cnx_remove_rc.
Switch from FreeRTOS queue to task notification.
Removed unknown/unused code.
Rename sdk_ets_handler_isr to process_pending_timers
Add function for microseconds
Simplify time to ticks conversion
Fix sdk_system_rtc_mem_write and sdk_system_rtc_mem_read,
the functions did not use the user-provided offsets to rtc_mem.
Without using offset, rboot's rtcdata access, and its
temp_rom handling were broken.
Also code for sdk_cnx_sta_leave, although disabled due to accessing static date, but it shows a reference to the netif->flags and the NETIF_FLAG_DHCP flag removed in lwip v2.
Function sdk_eagle_auth_done accesses the netif-flags and the NETIF_FLAG_DHCP flag removed in lwip v2, and also the netif->ip_addr so is needed for lwip development.
Function sdk_wpa_config_bss accesses the netif->hwaddr.
Also code for a few other trivial functions that help debug the dhcpc paths.
The function sdk_wifi_station_start is one of two paths that allocates a lwip struct netif and also accesses the netif->hwaddr slot so this is required for lwip development.
Also code for sdk_wifi_station_stop and sdk_sta_status_set to better understand the status state.
Add source code for functions touching the struct netif to better support lwip development: sdk_wifi_get_ip_info, sdk_wifi_set_ip_info, sdk_wifi_get_macaddr, sdk_wifi_set_macaddr.
Also code for sdk_wifi_station_get_connect_status.
Also code for wifi_get_sleep_type and set_sleep_type, noting wifi_set_sleep_type returns a bool success flag, and implement wifi_get_sleep_type using sdk_pm_get_sleep_type.
Also comment the point at which the bus clock that drives the uart changes on startup and comment out the change in the uart divisor. This at least allows a consistent uart baud rate during a restart if using the rate 115200.
* wifi_set_sleep_type returns a bool success flag.
* wifi_get_sleep_type seemed useless, just returning an argument. Added an implementation using sdk_pm_get_sleep_type.
Fixes#147
* Can vary tick rate from 100Hz via configTICK_RATE_HZ. Note that the
SDK binary libraries are hard-coded to assume the tick rate is 100Hz,
so changing the tick rate may have unexpected consequences for lower
layer WiFi behaviour (such as certain kinds of timeouts happening
faster/slower.)
* Setting configCPU_CLOCK_HZ to 160MHz means ESP will set 160MHz during
initialisation. Only 80MHz and 160MHz are supported.
* Timing of tasks is no longer affected by current CPU freq (whether set
via configCPU_CLOCK_HZ or via sdk_system_update_cpu_freq().)
Previously doubling the CPU frequency would double the tick rate.
