Corrected issue with BLE not working on nrf52840

Author: siehputz

ports/nrf/common-hal/busio/SPI.c

@@ -104,8 +104,12 @@ void common_hal_busio_spi_never_reset(busio_spi_obj_t *self) {
             never_reset[i] = true;
 
             never_reset_pin_number(self->clock_pin_number);
-            never_reset_pin_number(self->MOSI_pin_number);
-            never_reset_pin_number(self->MISO_pin_number);
+            if ( self->MOSI_pin_number != NO_PIN) {
+                never_reset_pin_number(self->MOSI_pin_number);
+            }
+            if ( self->MISO_pin_number != NO_PIN) {
+                never_reset_pin_number(self->MISO_pin_number);
+            }
             break;
         }
     }
@@ -180,7 +184,7 @@ void common_hal_busio_spi_construct(busio_spi_obj_t *self, const mcu_pin_obj_t *
 
     if (miso != NULL) {
         config.miso_pin = miso->number;
-        self->MISO_pin_number = mosi->number;
+        self->MISO_pin_number = miso->number;
         claim_pin(miso);
     } else {
         self->MISO_pin_number = NO_PIN;
@@ -204,8 +208,12 @@ void common_hal_busio_spi_deinit(busio_spi_obj_t *self) {
     nrfx_spim_uninit(&self->spim_peripheral->spim);
 
     reset_pin_number(self->clock_pin_number);
-    reset_pin_number(self->MOSI_pin_number);
-    reset_pin_number(self->MISO_pin_number);
+    if ( self->MOSI_pin_number != NO_PIN) {
+        reset_pin_number(self->MOSI_pin_number);
+    }
+    if ( self->MISO_pin_number != NO_PIN) {
+        reset_pin_number(self->MISO_pin_number);
+    }
 }
 
 bool common_hal_busio_spi_configure(busio_spi_obj_t *self, uint32_t baudrate, uint8_t polarity, uint8_t phase, uint8_t bits) {