Merge branch 'cc32d9-dev' into dev

Kconfig

@@ -55,6 +55,21 @@ config TTN_SPI_FREQ
     help
         SPI frequency to communicate between ESP32 and SX127x radio chip
 
+choice TTN_RESET
+    prompt "Reset states"
+    default TTN_RESET_STATES_FLOATING
+    help
+        Reset pin can be floating for most boards and shields.
+        A few boards/shields require the pin to be held high for operation.
+
+config TTN_RESET_STATES_FLOATING
+    bool "Toggle between low and floating"
+
+config TTN_RESET_STATES_ASSERTED
+    bool "Toggle between low and high"
+
+endchoice
+
 config TTN_BG_TASK_PRIO
     int "Background task priority"
     default 10

src/hal/hal_esp32.cpp

@@ -124,14 +124,22 @@ void hal_pin_rst(u1_t val)
         return;
 
     if (val == 0 || val == 1)
-    { // drive pin
+    {
+        // drive pin
         gpio_set_level(ttn_hal.pinRst, val);
         gpio_set_direction(ttn_hal.pinRst, GPIO_MODE_OUTPUT);
     }
     else
-    { // keep pin floating
+    {
+#if defined(CONFIG_TTN_RESET_STATES_ASSERTED)
+        // drive up the pin because the hardware is nonstandard
+        gpio_set_level(ttn_hal.pinRst, 1);
+        gpio_set_direction(ttn_hal.pinRst, GPIO_MODE_OUTPUT);
+#else
+        // keep pin floating
         gpio_set_level(ttn_hal.pinRst, val);
         gpio_set_direction(ttn_hal.pinRst, GPIO_MODE_INPUT);
+#endif
     }
 }