1 files changed, 5 insertions, 2 deletions
diff --git a/src/drivers/SpiMaster.cpp b/src/drivers/SpiMaster.cpp
index e2be5027..0d5bb83c 100644
--- a/src/drivers/SpiMaster.cpp
+++ b/src/drivers/SpiMaster.cpp
@@ -7,11 +7,14 @@
 using namespace Pinetime::Drivers;
 
 SpiMaster::SpiMaster(const SpiMaster::SpiModule spi, const SpiMaster::Parameters& params) : spi {spi}, params {params} {
-  mutex = xSemaphoreCreateBinary();
-  ASSERT(mutex != NULL);
 }
 
 bool SpiMaster::Init() {
+  if(mutex == nullptr) {
+    mutex = xSemaphoreCreateBinary();
+    ASSERT(mutex != nullptr);
+  }
+
   /* Configure GPIO pins used for pselsck, pselmosi, pselmiso and pselss for SPI0 */
   nrf_gpio_pin_set(params.pinSCK);
   nrf_gpio_cfg_output(params.pinSCK);