SPI mutex lock

arduino · Jun 29, 2024 · b82e554 · b82e554
1 parent 2ece915
commit b82e554
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Showing 2 changed files with 4 additions and 0 deletions.
diff --git a/libraries/SPI/SPI.cpp b/libraries/SPI/SPI.cpp
@@ -81,9 +81,11 @@ void arduino::MbedSPI::beginTransaction(SPISettings settings) {
         dev->obj->frequency(settings.getClockFreq());
         this->settings = settings;
     }
+    spiLockMutex.lock();
 }
 
 void arduino::MbedSPI::endTransaction(void) {
+    spiLockMutex.unlock();
     // spinlock until transmission is over (if using ASYNC transfer)
 }
 

diff --git a/libraries/SPI/SPI.h b/libraries/SPI/SPI.h
@@ -20,6 +20,7 @@
 
 #include "Arduino.h"
 #include "api/HardwareSPI.h"
+#include <Mutex.h>
 
 typedef struct _mbed_spi mbed_spi;
 
@@ -50,6 +51,7 @@ class MbedSPI : public SPIClass
 private:
     SPISettings settings = SPISettings(0, MSBFIRST, SPI_MODE0);
     _mbed_spi* dev = NULL;
+    rtos::Mutex spiLockMutex;
     PinName _miso;
     PinName _mosi;
     PinName _sck;