STM32F7 - Add tests for asynchronous serial

Author: svastm

libraries/tests/utest/serial_asynch/serial_asynch.cpp

@@ -103,6 +103,18 @@
 #define TEST_SERIAL_ONE_TX_PIN PB_6  // UART1
 #define TEST_SERIAL_TWO_RX_PIN PG_9  // UART6
 
+#elif defined(TARGET_DISCO_F746NG)
+#define TEST_SERIAL_ONE_TX_PIN PC_6  // UART6
+#define TEST_SERIAL_TWO_RX_PIN PF_6  // UART7
+
+#elif defined(TARGET_NUCLEO_F746ZG)
+#define TEST_SERIAL_ONE_TX_PIN PC_12  // UART5
+#define TEST_SERIAL_TWO_RX_PIN PC_11  // UART4
+
+#elif defined(TARGET_NUCLEO_F767ZI)
+#define TEST_SERIAL_ONE_TX_PIN PC_12  // UART5
+#define TEST_SERIAL_TWO_RX_PIN PC_11  // UART4
+
 #elif defined(TARGET_NUCLEO_L476RG)
 #define TEST_SERIAL_ONE_TX_PIN PB_10   // UART3
 #define TEST_SERIAL_TWO_RX_PIN PA_10   // UART1