Support Nuvoton's NuMaker-IoT-M487 board

targets/TARGET_NUVOTON/TARGET_M480/PinNames.h

@@ -125,7 +125,11 @@ typedef enum {
     LED3 = LED_GREEN,
     LED4 = LED1,    // No real LED. Just for passing ATS.
     // Button naming
+#if TARGET_NUMAKER_PFM_M487
     SW2 = PG_15,
+#elif TARGET_NUMAKER_IOT_M487
+    SW2 = PG_5,
+#endif
     SW3 = PF_11,
     
 } PinName;

targets/targets.json

@@ -4501,5 +4501,47 @@
         "device_name": "TMPM3H6FWFG",
         "detect_code": ["7012"],
         "release_versions": ["5"]
+    },
+    "NUMAKER_IOT_M487": {
+        "core": "Cortex-M4F",
+        "default_toolchain": "ARM",
+        "extra_labels": ["NUVOTON", "M480", "FLASH_CMSIS_ALGO","NUVOTON_EMAC"],
+        "is_disk_virtual": true,
+        "supported_toolchains": ["ARM", "uARM", "GCC_ARM", "IAR"],
+        "config": {
+            "gpio-irq-debounce-enable": {
+                "help": "Enable GPIO IRQ debounce",
+                "value": 0
+            },
+            "gpio-irq-debounce-enable-list": {
+                "help": "Comma separated pin list to enable GPIO IRQ debounce",
+                "value": "NC"
+            },
+            "gpio-irq-debounce-clock-source": {
+                "help": "Select GPIO IRQ debounce clock source: GPIO_DBCTL_DBCLKSRC_HCLK or GPIO_DBCTL_DBCLKSRC_LIRC",
+                "value": "GPIO_DBCTL_DBCLKSRC_LIRC"
+            },
+            "gpio-irq-debounce-sample-rate": {
+                "help": "Select GPIO IRQ debounce sample rate: GPIO_DBCTL_DBCLKSEL_1, GPIO_DBCTL_DBCLKSEL_2, GPIO_DBCTL_DBCLKSEL_4, ..., or GPIO_DBCTL_DBCLKSEL_32768",
+                "value": "GPIO_DBCTL_DBCLKSEL_16"
+            },
+            "usb-device-hsusbd": {
+                "help": "Select high-speed USB device or not",
+                "value": 1
+            },
+            "ctrl01-enable": {
+                "help": "Enable control_01",
+                "value": 0
+            }
+        },
+        "inherits": ["Target"],
+        "macros_add": ["MBEDTLS_CONFIG_HW_SUPPORT", "LPTICKER_DELAY_TICKS=3"],
+        "device_has": ["USTICKER", "LPTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "TRNG", "FLASH", "CAN", "EMAC"],
+        "release_versions": ["5"],
+        "device_name": "M487JIDAE",
+        "bootloader_supported": true,
+        "overrides": {
+            "network-default-interface-type": "ETHERNET"
+        }
     }
 }