compile error for F7

Author: pschatzmann

src/stm32-config-i2s.h

@@ -65,3 +65,16 @@
     };
   #define IS_H7
 #endif
+
+#ifdef STM32F723xx
+  #define SPI_INSTANCE_FOR_I2S SPI3
+  #define STM_I2S_PINS \
+    { \
+      {mclk, PB_7, GPIO_AF6_SPI3},\
+      {bck, PB_3, GPIO_AF6_SPI3},\
+      {ws, PA_15, GPIO_AF6_SPI3},\
+      {data_out, PB_5, GPIO_AF6_SPI3},\
+      {data_in, PB_4, GPIO_AF6_SPI3}\
+    };
+  #define IS_F7
+#endif

src/stm32-i2s.h

@@ -210,6 +210,7 @@ class Stm32I2sClass {
         }
       }
 
+#ifndef IS_F7
       if (receive && transmit) {
         if (HAL_I2SEx_TransmitReceive_DMA(&hi2s3, (uint16_t *)dma_buffer_tx,
                                           (uint16_t *)dma_buffer_rx,
@@ -219,6 +220,7 @@ class Stm32I2sClass {
           result = false;
         }
       }
+#endif
     }
 
     return result;