examples: fix default channel setting for all radios

The config assumed it was a 2.4 GHz radio. This solution isn't perfect
either but eliminates a few more cases.

examples/default/Makefile

@@ -69,8 +69,18 @@ ifneq (,$(filter msba2,$(BOARD)))
   USEMODULE += random
 endif
 
-# Set a custom 802.15.4 channel if needed
-DEFAULT_CHANNEL ?= 26
-CFLAGS += -DDEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
-
 include $(RIOTBASE)/Makefile.include
+
+# Set a custom channel if needed
+ifeq (,$(filter cc110x,$(USEMODULE)))     # radio is cc110x sub-GHz
+  DEFAULT_CHANNEL ?= 0
+  CFLAGS += -DCC110X_DEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
+else
+  ifeq (,$(filter at86rf212b,$(USEMODULE)))   # radio is IEEE 802.15.4 sub-GHz
+    DEFAULT_CHANNEL ?= 5
+    CFLAGS += -DIEEE802154_DEFAULT_SUBGHZ_CHANNEL=$(DEFAULT_CHANNEL)
+  else                                      # radio is IEEE 802.15.4 2.4 GHz
+    DEFAULT_CHANNEL ?= 26
+    CFLAGS += -DIEEE802154_DEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
+  endif
+endif

examples/gnrc_border_router/Makefile

@@ -43,10 +43,6 @@ USEMODULE += ps
 # include UHCP client
 USEMODULE += gnrc_uhcpc
 
-# Set a custom 802.15.4 channel if needed
-DEFAULT_CHANNEL ?= 26
-CFLAGS += -DDEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
-
 # Comment this out to disable code in RIOT that does safety checking
 # which is not needed in a production environment but helps in the
 # development process:
@@ -66,3 +62,17 @@ term: host-tools
 
 host-tools:
 	$(AD)env -u CC -u CFLAGS make -C $(RIOTBASE)/dist/tools
+
+# Set a custom channel if needed
+ifeq (,$(filter cc110x,$(USEMODULE)))     # radio is cc110x sub-GHz
+  DEFAULT_CHANNEL ?= 0
+  CFLAGS += -DCC110X_DEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
+else
+  ifeq (,$(filter at86rf212b,$(USEMODULE)))   # radio is IEEE 802.15.4 sub-GHz
+    DEFAULT_CHANNEL ?= 5
+    CFLAGS += -DIEEE802154_DEFAULT_SUBGHZ_CHANNEL=$(DEFAULT_CHANNEL)
+  else                                      # radio is IEEE 802.15.4 2.4 GHz
+    DEFAULT_CHANNEL ?= 26
+    CFLAGS += -DIEEE802154_DEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
+  endif
+endif

examples/gnrc_minimal/Makefile

@@ -36,13 +36,23 @@ USEMODULE += gnrc_icmpv6_echo
 # Use minimal standard PRNG
 USEMODULE += prng_minstd
 
-# Set a custom 802.15.4 channel if needed
-DEFAULT_CHANNEL ?= 26
-CFLAGS += -DDEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
-
 CFLAGS += -DGNRC_PKTBUF_SIZE=512 -DGNRC_IPV6_NETIF_ADDR_NUMOF=4 -DGNRC_IPV6_NC_SIZE=1
 
 # Change this to 0 show compiler invocation lines by default:
 QUIET ?= 1
 
 include $(RIOTBASE)/Makefile.include
+
+# Set a custom channel if needed
+ifeq (,$(filter cc110x,$(USEMODULE)))     # radio is cc110x sub-GHz
+  DEFAULT_CHANNEL ?= 0
+  CFLAGS += -DCC110X_DEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
+else
+  ifeq (,$(filter at86rf212b,$(USEMODULE)))   # radio is IEEE 802.15.4 sub-GHz
+    DEFAULT_CHANNEL ?= 5
+    CFLAGS += -DIEEE802154_DEFAULT_SUBGHZ_CHANNEL=$(DEFAULT_CHANNEL)
+  else                                      # radio is IEEE 802.15.4 2.4 GHz
+    DEFAULT_CHANNEL ?= 26
+    CFLAGS += -DIEEE802154_DEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
+  endif
+endif

examples/microcoap_server/Makefile

@@ -33,10 +33,6 @@ CFLAGS += -DMICROCOAP_DEBUG
 # include this for printing IP addresses
 USEMODULE += shell_commands
 
-# Set a custom 802.15.4 channel if needed
-DEFAULT_CHANNEL ?= 26
-CFLAGS += -DDEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
-
 # Comment this out to disable code in RIOT that does safety checking
 # which is not needed in a production environment but helps in the
 # development process:
@@ -60,3 +56,17 @@ endif
 QUIET ?= 1
 
 include $(RIOTBASE)/Makefile.include
+
+# Set a custom channel if needed
+ifeq (,$(filter cc110x,$(USEMODULE)))     # radio is cc110x sub-GHz
+  DEFAULT_CHANNEL ?= 0
+  CFLAGS += -DCC110X_DEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
+else
+  ifeq (,$(filter at86rf212b,$(USEMODULE)))   # radio is IEEE 802.15.4 sub-GHz
+    DEFAULT_CHANNEL ?= 5
+    CFLAGS += -DIEEE802154_DEFAULT_SUBGHZ_CHANNEL=$(DEFAULT_CHANNEL)
+  else                                      # radio is IEEE 802.15.4 2.4 GHz
+    DEFAULT_CHANNEL ?= 26
+    CFLAGS += -DIEEE802154_DEFAULT_CHANNEL=$(DEFAULT_CHANNEL)
+  endif
+endif