cpu/esp8266: Makefile fixes for ets_task thread

Changes of ETS task handling require the context switch by software interrupt. The context switch based on interrupt is therefore enabled by default. Furthermore, the number of priority levels are increased due to the new additional thread.

cpu/esp8266/Makefile.dep

 # additional modules dependencies
 
+ifneq (, $(filter esp_sdk, $(USEMODULE)))
+    USEMODULE += core_thread_flags
+endif
+
+ifneq (, $(filter esp_spiffs, $(USEMODULE)))
+    export SPIFFS_STD_OPTION = -std=c99
+    USEMODULE += spiffs
+    USEMODULE += vfs
+endif
+
 ifneq (, $(filter lua, $(USEPKG)))
     USEMODULE += newlib_syscalls_default
     USEMODULE += xtimer
@@ -35,13 +45,3 @@ endif
 ifneq (, $(filter newlib_syscalls_default, $(USEMODULE)))
     USEMODULE += stdio_uart
 endif
-
-# network interface dependencies
-ifneq (, $(filter netdev_default, $(USEMODULE)))
-    # if NETDEV_DEFAULT is empty, we use module mrf24j40 as default network device
-    ifndef NETDEV_DEFAULT
-        USEMODULE += mrf24j40
-    else
-        USEMODULE += $(NETDEV_DEFAULT)
-    endif
-endif

cpu/esp8266/Makefile.include

@@ -24,6 +24,16 @@ endif
 
 ifeq ($(ENABLE_GDBSTUB), 1)
     USEMODULE += esp_gdbstub
+endif
+
+# SPECIAL module dependencies
+# cannot be done in Makefile.dep since Makefile.dep is included too late
+
+ifneq (, $(filter esp_sw_timer, $(USEMODULE)))
+    USEMODULE += esp_sdk
+endif
+
+ifneq (, $(filter esp_gdbstub, $(USEMODULE)))
     USEMODULE += esp_gdb
 endif
 
@@ -39,7 +49,17 @@ PSEUDOMODULES += esp_sdk_int_handling
 PSEUDOMODULES += esp_sw_timer
 PSEUDOMODULES += esp_spiffs
 
+USEMODULE += esp
+USEMODULE += mtd
+USEMODULE += periph
+USEMODULE += periph_common
+USEMODULE += ps
+USEMODULE += random
+USEMODULE += sdk
+USEMODULE += xtensa
+
 ifneq (, $(filter pthread, $(USEMODULE)))
+    # has to be included before $(ESP8266_NEWLIB_DIR)
     INCLUDES += -I$(RIOTBASE)/sys/posix/pthread/include
 endif
 
@@ -49,13 +69,14 @@ INCLUDES += -I$(RIOTCPU)/$(CPU)
 INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor
 INCLUDES += -I$(RIOTCPU)/$(CPU)/vendor/espressif
 
-CFLAGS  += -DESP_OPEN_SDK
+CFLAGS  += -DESP_OPEN_SDK -DSCHED_PRIO_LEVELS=32
 CFLAGS  += -Wno-unused-parameter -Wformat=0
-CFLAGS  += -mlongcalls -mtext-section-literals -fdata-sections
+CFLAGS  += -mlongcalls -mtext-section-literals
+CFLAGS  += -fdata-sections -fzero-initialized-in-bss
 ASFLAGS += --longcalls --text-section-literals
 
-ifneq (, $(filter esp_sw_timer, $(USEMODULE)))
-    USEMODULE += esp_sdk
+ifeq (, $(filter esp_sdk_int_handling, $(USEMODULE)))
+    CFLAGS += -DCONTEXT_SWITCH_BY_INT
 endif
 
 ifneq (, $(filter esp_sdk, $(USEMODULE)))
@@ -70,17 +91,9 @@ ifneq (, $(filter esp_gdbstub, $(USEMODULE)))
 endif
 
 ifneq (, $(filter esp_gdb, $(USEMODULE)))
-    CFLAGS_OPT = -fzero-initialized-in-bss -Og -ggdb -g3
+    CFLAGS += -Og -ggdb -g3
 else
-    CFLAGS_OPT = -fzero-initialized-in-bss -O2
-endif
-
-CFLAGS += $(CFLAGS_OPT)
-
-ifneq (, $(filter esp_spiffs, $(USEMODULE)))
-    export SPIFFS_STD_OPTION = -std=c99
-    USEMODULE += spiffs
-    USEMODULE += vfs
+    CFLAGS += -Os
 endif
 
 ifeq ($(QEMU), 1)
@@ -115,15 +128,6 @@ LINKFLAGS += -T$(RIOTCPU)/$(CPU)/ld/eagle.rom.addr.v6.ld
 LINKFLAGS += -nostdlib -lgcc -u ets_run -Wl,-gc-sections # -Wl,--print-gc-sections
 LINKFLAGS += -Wl,--warn-unresolved-symbols
 
-USEMODULE += esp
-USEMODULE += mtd
-USEMODULE += periph
-USEMODULE += periph_common
-USEMODULE += ps
-USEMODULE += random
-USEMODULE += sdk
-USEMODULE += xtensa
-
 # configure preflasher to convert .elf to .bin before flashing
 FLASH_SIZE = -fs 8m
 export PREFLASHER ?= esptool.py
@@ -143,5 +147,5 @@ else
     export FFLAGS += -p $(PORT) -b $(PROGRAMMER_SPEED) write_flash
     export FFLAGS += -fm $(FLASH_MODE)
     export FFLAGS += 0 $(ELFFILE)-0x00000.bin
-    export FFLAGS += 0x10000 $(ELFFILE)-0x10000.bin
+    export FFLAGS += 0x10000 $(ELFFILE)-0x10000.bin; esptool.py -p $(PORT) run
 endif