lora buildflag and disable cleanly with pyeth

previously lora was only /not started/ with pyethernet enabled. but when user tries to use it, it crashes with a nasty looking error:
https://forum.pycom.io/topic/6176/pygate-assert-failed-error/2

with this change, lora can be fully excluded now and a user would get the much cleaner: ImportError: cannot import name LoRa

esp32/Makefile

@@ -32,8 +32,19 @@ PYGATE_ENABLED ?= 0
 # COAP is enabled by default
 MOD_COAP_ENABLED ?= 1
 
-# SIGFOX is enabled by default. It will only be built for supported boards.
+# LORA is enabled by default for supported boards
+ifeq ($(BOARD), $(filter $(BOARD), LOPY LOPY4 FIPY))
+MOD_LORA_ENABLED ?= 1
+else
+MOD_LORA_ENABLED ?= 0
+endif
+
+# SIGFOX is enabled by default for supported boards
+ifeq ($(BOARD), $(filter $(BOARD), SIPY LOPY4 FIPY))
 MOD_SIGFOX_ENABLED ?= 1
+else
+MOD_SIGFOX_ENABLED ?= 0
+endif
 
 # Pybytes disabled by default
 PYBYTES_ENABLED ?= 0
@@ -55,6 +66,7 @@ ifeq ($(VARIANT),PYGATE)
     endif
     PYBYTES_ENABLED=1
     PYETH_ENABLED=1
+    MOD_LORA_ENABLED=0 # ETH and LORA are mutually exclusive
     PYGATE_ENABLED=1
 endif
 
@@ -156,19 +168,21 @@ ifeq ($(MOD_COAP_ENABLED), 1)
     CFLAGS += -DMOD_COAP_ENABLED
 endif
 
+ifeq ($(MOD_LORA_ENABLED), 1)
+    $(info LORA Module Enabled)
+    CFLAGS += -DMOD_LORA_ENABLED
+endif
+
 ifeq ($(DIFF_UPDATE_ENABLED), 1)
     $(info Differential Update Enabled)
     CFLAGS += -DDIFF_UPDATE_ENABLED -DBZ_NO_STDIO
 endif
 
 ifeq ($(MOD_SIGFOX_ENABLED), 1)
     $(info SIGFOX Module Enabled)
-
-    ifeq ($(BOARD), $(filter $(BOARD), SIPY LOPY4 FIPY))
-        CFLAGS += -DMOD_SIGFOX_ENABLED
-        LIBS += sigfox/modsigfox_$(BOARD).a -lsigfox
-        $(BUILD)/application.elf: sigfox/modsigfox_$(BOARD).a
-    endif
+    CFLAGS += -DMOD_SIGFOX_ENABLED
+    LIBS += sigfox/modsigfox_$(BOARD).a -lsigfox
+    $(BUILD)/application.elf: sigfox/modsigfox_$(BOARD).a
 endif
 
 ifeq ($(OPENTHREAD), on)

esp32/application.mk

@@ -388,13 +388,30 @@ BOOT_SRC_C = $(addprefix bootloader/,\
 SFX_OBJ =
 
 OBJ = $(PY_O)
+ifeq ($(MOD_LORA_ENABLED), 1)
+
+ifeq ($(BOARD), $(filter $(BOARD), LOPY FIPY))
+OBJ += $(addprefix $(BUILD)/, $(APP_LORA_SRC_C:.c=.o) $(APP_LIB_LORA_SRC_C:.c=.o) $(APP_SX1272_SRC_C:.c=.o) $(APP_MODS_LORA_SRC_C:.c=.o))
+endif
+
+ifeq ($(BOARD), $(filter $(BOARD), LOPY4))
+OBJ += $(addprefix $(BUILD)/, $(APP_LORA_SRC_C:.c=.o) $(APP_LIB_LORA_SRC_C:.c=.o) $(APP_SX1276_SRC_C:.c=.o) $(APP_MODS_LORA_SRC_C:.c=.o))
+endif
+
+endif
+
+ifeq ($(MOD_SIGFOX_ENABLED), 1)
+
 ifeq ($(BOARD), $(filter $(BOARD), LOPY FIPY))
 OBJ += $(addprefix $(BUILD)/, $(APP_LORA_SRC_C:.c=.o) $(APP_LIB_LORA_SRC_C:.c=.o) $(APP_SX1272_SRC_C:.c=.o) $(APP_MODS_LORA_SRC_C:.c=.o))
 endif
+
 ifeq ($(BOARD), $(filter $(BOARD), LOPY4))
 OBJ += $(addprefix $(BUILD)/, $(APP_LORA_SRC_C:.c=.o) $(APP_LIB_LORA_SRC_C:.c=.o) $(APP_SX1276_SRC_C:.c=.o) $(APP_MODS_LORA_SRC_C:.c=.o))
 endif
 
+endif
+
 ifeq ($(MOD_SIGFOX_ENABLED), 1)
 ifeq ($(BOARD), $(filter $(BOARD), SIPY))
 OBJ += $(addprefix $(BUILD)/, $(APP_SIGFOX_MOD_SRC_C:.c=.o))

esp32/mods/modmachine.c

@@ -410,7 +410,7 @@ STATIC mp_obj_t machine_sleep (uint n_args, const mp_obj_t *arg) {
     }
 #endif
 
-#if defined(LOPY) || defined(LOPY4) || defined(FIPY)
+#ifdef MOD_LORA_ENABLED
     /* Send LoRa module to Sleep Mode */
     modlora_sleep_module();
     while(!modlora_is_module_sleep())

esp32/mods/modnetwork.c

@@ -112,11 +112,11 @@ mp_obj_t mod_network_find_nic(const mod_network_socket_obj_t *s, const uint8_t *
         mp_obj_t nic = MP_STATE_PORT(mod_network_nic_list).items[i];
         // we want a raw network card
         if (ip == NULL) {
-        #if defined (LOPY) || defined(LOPY4) || defined (FIPY)
+#ifdef MOD_LORA_ENABLED
             if (mp_obj_get_type(nic) == (mp_obj_type_t *)&mod_network_nic_type_lora && s->sock_base.u.u_param.domain == AF_LORA) {
                 return nic;
             }
-        #endif
+#endif
         #if defined (SIPY) || defined (LOPY4) || defined (FIPY)
         #if defined (MOD_SIGFOX_ENABLED)
             if (mp_obj_get_type(nic) == (mp_obj_type_t *)&mod_network_nic_type_sigfox && s->sock_base.u.u_param.domain == AF_SIGFOX) {
@@ -371,7 +371,7 @@ STATIC const mp_map_elem_t mp_module_network_globals_table[] = {
 #ifdef PYETH_ENABLED
     { MP_OBJ_NEW_QSTR(MP_QSTR_ETH),                (mp_obj_t)&mod_network_nic_type_eth },
 #endif
-#if defined (LOPY) || defined(LOPY4) || defined (FIPY)
+#ifdef MOD_LORA_ENABLED
     { MP_OBJ_NEW_QSTR(MP_QSTR_LoRa),                (mp_obj_t)&mod_network_nic_type_lora },
 #endif
 #if defined (SIPY) || defined (LOPY4) || defined (FIPY)

esp32/mods/modusocket.c

@@ -272,7 +272,7 @@ STATIC mp_obj_t socket_bind(mp_obj_t self_in, mp_obj_t addr_in) {
     mod_network_socket_obj_t *self = self_in;
     int _errno;
 
-#if defined (LOPY) || defined(LOPY4) || defined(FIPY)
+#ifdef MOD_LORA_ENABLED
     if (self->sock_base.nic_type == &mod_network_nic_type_lora) {
         if (MP_OBJ_IS_INT(addr_in)) {
               mp_uint_t port = mp_obj_get_int(addr_in);
@@ -301,7 +301,7 @@ STATIC mp_obj_t socket_bind(mp_obj_t self_in, mp_obj_t addr_in) {
         if (self->sock_base.nic_type->n_bind(self, ip, port, &_errno) != 0) {
             nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(_errno)));
         }
-#if defined (LOPY) || defined(LOPY4) || defined(FIPY)
+#ifdef MOD_LORA_ENABLED
     }
 #endif
     return mp_const_none;
@@ -521,7 +521,7 @@ STATIC mp_obj_t socket_sendto(mp_obj_t self_in, mp_obj_t data_in, mp_obj_t addr_
     uint8_t ip[MOD_USOCKET_IPV6_CHARS_MAX];
     mp_uint_t port = 0;
 
-#if defined (LOPY) || defined(LOPY4) || defined(FIPY)
+#ifdef MOD_LORA_ENABLED
     if (self->sock_base.nic_type == &mod_network_nic_type_lora) {
         mp_obj_t *addr_items;
         mp_obj_get_array_fixed_n(addr_in, 2, &addr_items);
@@ -579,7 +579,7 @@ STATIC mp_obj_t socket_recvfrom(mp_obj_t self_in, mp_obj_t len_in) {
         vstr.buf[vstr.len] = '\0';
         tuple[0] = mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
     }
-#if defined (LOPY) || defined(LOPY4) || defined(FIPY)
+#ifdef MOD_LORA_ENABLED
     // check if lora NIC and IP is not set (so Lora Raw or LoraWAN, but no Lora Mesh)
     if (self->sock_base.nic_type == &mod_network_nic_type_lora) {
             if (ip[0] == 0) {

esp32/mptask.c

@@ -52,14 +52,12 @@
 #include "esp_log.h"
 #include "mods/pybflash.h"
 
-#if defined (LOPY) || defined (LOPY4) || defined (FIPY)
+#ifdef MOD_LORA_ENABLED
 #include "modlora.h"
 #endif
-#if defined (SIPY) || defined(LOPY4) || defined (FIPY)
-#if defined (MOD_SIGFOX_ENABLED)
+#ifdef MOD_SIGFOX_ENABLED
 #include "sigfox/modsigfox.h"
 #endif
-#endif
 #if defined (GPY) || defined (FIPY)
 #include "modlte.h"
 #endif
@@ -260,35 +258,27 @@ void TASK_Micropython (void *pvParameters) {
         // Config Wifi as per Pycom config
         mptask_config_wifi(false);
         // these ones are special because they need uPy running and they launch tasks
-#ifndef PYETH_ENABLED
-// PyEth and LoRa module are both connected via SPI 3,
-// so with PyEth enabled, we disable th LoRa module
-#if defined(LOPY) || defined (LOPY4) || defined (FIPY)
+#ifdef MOD_LORA_ENABLED
         modlora_init0();
 #endif
-#if defined(SIPY) || defined(LOPY4) || defined (FIPY)
-#if defined (MOD_SIGFOX_ENABLED)
+#ifdef MOD_SIGFOX_ENABLED
         modsigfox_init0();
-#endif
-#endif
 #endif
     }
 
     // initialize the serial flash file system
     mptask_init_sflash_filesystem();
 
-#if defined(LOPY) || defined(SIPY) || defined (LOPY4) || defined(FIPY)
+#if defined(MOD_LORA_ENABLED) || defined(MOD_SIGFOX_ENABLED)
     // must be done after initializing the file system
     mptask_update_lpwan_mac_address();
 #endif
 
-#if defined(SIPY) || defined(LOPY4) || defined(FIPY)
-#if defined (MOD_SIGFOX_ENABLED)
+#ifdef MOD_SIGFOX_ENABLED
     sigfox_update_id();
     sigfox_update_pac();
     sigfox_update_private_key();
     sigfox_update_public_key();
-#endif
 #endif
 
     // append the flash paths to the system path