Add Metro ESP32S2

Also fix two bugs:
* Crash when resetting board.SPI when it hasn't been inited.
* Reading back the output value is always false. Fixes #3353

1 files changed, 3 insertions, 1 deletions

diff --git a/shared-module/board/__init__.c b/shared-module/board/__init__.c
index fb4f731b8..39b68a0f1 100644
--- a/shared-module/board/__init__.c
+++ b/shared-module/board/__init__.c
@@ -167,7 +167,9 @@ void reset_board_busses(void) {
     }
     #endif
     // make sure SPI lock is not held over a soft reset
-    common_hal_busio_spi_unlock(&spi_obj);
+    if (spi_singleton != NULL) {
+        common_hal_busio_spi_unlock(spi_singleton);
+    }
     if (!display_using_spi) {
         spi_singleton = NULL;
     }