lorapf: add pygate_reset() to power cycle the module

this will reset the esp32 and the LTE modem on the GPy

this requires PIC FW v12

Author: peter-pycom

esp32/mods/modmachine.c

@@ -287,6 +287,13 @@ STATIC mp_obj_t machine_pygate_deinit (void) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_pygate_deinit_obj, machine_pygate_deinit);
 
+
+STATIC mp_obj_t machine_pygate_reset (void) {
+    pygate_reset();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_pygate_reset_obj, machine_pygate_reset);
+
 STATIC mp_obj_t machine_pygate_debug_level (mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     STATIC const mp_arg_t allowed_args[] = {
         { MP_QSTR_level,  MP_ARG_INT, },
@@ -622,6 +629,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
 #ifdef PYGATE_ENABLED
     { MP_OBJ_NEW_QSTR(MP_QSTR_pygate_init),             (mp_obj_t)&machine_pygate_init_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_pygate_deinit),           (mp_obj_t)&machine_pygate_deinit_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_pygate_reset),            (mp_obj_t)&machine_pygate_reset_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_pygate_debug_level),      (mp_obj_t)&machine_pygate_debug_level_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_pygate_cmd_decode),       (mp_obj_t)&machine_pygate_cmd_decode_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_pygate_cmd_get),          (mp_obj_t)&machine_pygate_cmd_get_obj },

esp32/pygate/lora_pkt_fwd/lora_pkt_fwd.c

@@ -71,6 +71,9 @@ License: Revised BSD License, see LICENSE.TXT file include in the project
 #include "py/obj.h"
 #include "py/mpprint.h"
 #include "modmachine.h"
+#include "machpin.h"
+#include "pins.h"
+#include "sx1308-config.h"
 
 /* -------------------------------------------------------------------------- */
 /* --- PRIVATE MACROS ------------------------------------------------------- */
@@ -903,6 +906,38 @@ void lora_gw_init(const char* global_conf) {
     MSG_INFO("lora_gw_init() done fh=%u high=%u\n", xPortGetFreeHeapSize(), uxTaskGetStackHighWaterMark(NULL));
 }
 
+void pygate_reset() {
+    MSG_INFO("pygate_reset\n");
+
+    // pull sx1257 and sx1308 reset high, the PIC FW should power cycle the ESP32 as a result
+    pin_obj_t* sx1308_rst = SX1308_RST_PIN;
+    pin_config(sx1308_rst, -1, -1, GPIO_MODE_OUTPUT, MACHPIN_PULL_NONE, 0);
+    pin_obj_t* sx1257_rst = (&PIN_MODULE_P8);
+    pin_config(sx1257_rst, -1, -1, GPIO_MODE_OUTPUT, MACHPIN_PULL_NONE, 0);
+
+    sx1308_rst->value = 1;
+    sx1257_rst->value = 1;
+
+    pin_set_value(sx1308_rst);
+    pin_set_value(sx1257_rst);
+
+    vTaskDelay(5000 / portTICK_PERIOD_MS);
+
+    // if this is still being executed, then it seems the ESP32 reset did not take place
+    // set the two reset lines low again and stop the lora gw task, to make sure we return to a defined state
+    MSG_ERROR("pygate_reset failed to reset\n");
+    sx1308_rst->value = 0;
+    sx1257_rst->value = 0;
+    pin_set_value(sx1308_rst);
+    pin_set_value(sx1257_rst);
+
+    if (xLoraGwTaskHndl){
+        vTaskDelete(xLoraGwTaskHndl);
+        xLoraGwTaskHndl = NULL;
+    }
+
+}
+
 int lora_gw_get_debug_level(){
     return debug_level;
 }

esp32/pygate/lora_pkt_fwd/lora_pkt_fwd.h

@@ -28,6 +28,7 @@ Maintainer: Michael Coracin
 #include "py/mpprint.h"
 
 int lora_gw_init(char *);
+void pygate_reset();
 int lora_gw_get_debug_level();
 void lora_gw_set_debug_level(int level);