K64F: Fix pin names and migrate to Arduino Uno form factor

Fix pin names of K64F with the following from the latest guidelines:
* LEDs and buttons are defined as macros, digital and analog pins as
enums.
* No duplicated pin names with the same value.
* The Arduino form factor is deprecated in favour of Arduino Uno.

Note: The pins `SPI_xxx` are for SD card only, but the names are kept
for backward compatibility (i.e. no breaking change until the next
Mbed OS major version). The general purpose Arduino Uno SPI pins
(`ARDUINO_UNO_SPI_xxx`) are different and also available.

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/TARGET_FRDM/PinNames.h

@@ -1,5 +1,5 @@
 /* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
+ * Copyright (c) 2006-2021 ARM Limited
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -198,63 +198,37 @@ typedef enum {
     PTE30 = (4 << GPIO_PORT_SHIFT | 30),
     PTE31 = (4 << GPIO_PORT_SHIFT | 31),
 
-    LED_RED   = PTB22,
-    LED_GREEN = PTE26,
-    LED_BLUE  = PTB21,
-
-    // mbed original LED naming
-    LED1 = LED_RED,
-    LED2 = LED_GREEN,
-    LED3 = LED_BLUE,
-    LED4 = LED_RED,
-
-    //Push buttons
-    SW2 = PTC6,
-    SW3 = PTA4,
-    // Standardized button names
-    BUTTON1 = SW2,
-    BUTTON2 = SW3,
-
     // USB Pins
     CONSOLE_TX = PTB17,
     CONSOLE_RX = PTB16,
 
     // Arduino Headers
-    D0 = PTC16,
-    D1 = PTC17,
-    D2 = PTB9,
-    D3 = PTA1,
-    D4 = PTB23,
-    D5 = PTA2,
-    D6 = PTC2,
-    D7 = PTC3,
-    D8 = PTC12,
-    D9 = PTC4,
-    D10 = PTD0,
-    D11 = PTD2,
-    D12 = PTD3,
-    D13 = PTD1,
-    D14 = PTE25,
-    D15 = PTE24,
+    ARDUINO_UNO_D0 = PTC16,
+    ARDUINO_UNO_D1 = PTC17,
+    ARDUINO_UNO_D2 = PTB9,
+    ARDUINO_UNO_D3 = PTA1,
+    ARDUINO_UNO_D4 = PTB23,
+    ARDUINO_UNO_D5 = PTA2,
+    ARDUINO_UNO_D6 = PTC2,
+    ARDUINO_UNO_D7 = PTC3,
+    ARDUINO_UNO_D8 = PTC12,
+    ARDUINO_UNO_D9 = PTC4,
+    ARDUINO_UNO_D10 = PTD0,
+    ARDUINO_UNO_D11 = PTD2,
+    ARDUINO_UNO_D12 = PTD3,
+    ARDUINO_UNO_D13 = PTD1,
+    ARDUINO_UNO_D14 = PTE25,
+    ARDUINO_UNO_D15 = PTE24,
 
-    I2C_SCL = D15,
-    I2C_SDA = D14,
-
-    A0 = PTB2,
-    A1 = PTB3,
-    A2 = PTB10,
-    A3 = PTB11,
-    A4 = PTC11,
-    A5 = PTC10,
+    ARDUINO_UNO_A0 = PTB2,
+    ARDUINO_UNO_A1 = PTB3,
+    ARDUINO_UNO_A2 = PTB10,
+    ARDUINO_UNO_A3 = PTB11,
+    ARDUINO_UNO_A4 = PTC11,
+    ARDUINO_UNO_A5 = PTC10,
 
     DAC0_OUT = 0xFEFE, /* DAC does not have Pin Name in RM */
 
-    //SPI Pins configuration
-    SPI_MOSI    = PTE3,
-    SPI_MISO    = PTE1,
-    SPI_SCK     = PTE2,
-    SPI_CS      = PTE4,
-
     // Not connected
     NC = (int)0xFFFFFFFF
 } PinName;
@@ -267,6 +241,38 @@ typedef enum {
     PullDefault = PullUp
 } PinMode;
 
+
+// LEDs
+#define LED_RED   PTB22
+#define LED_GREEN PTE26
+#define LED_BLUE  PTB21
+
+// Standardized LED names
+#define LED1 LED_RED
+#define LED2 LED_GREEN
+#define LED3 LED_BLUE
+
+
+//Push buttons
+#define SW2 PTC6
+#define SW3 PTA4
+
+// Standardized button names
+#define BUTTON1 SW2
+#define BUTTON2 SW3
+
+
+// SPI Pins for SD card.
+// Note: They are different from the Arduino Uno SPI pins
+// (ARDUINO_UNO_SPI_xxx) for general purpose uses.
+// By default, Mbed OS maps those alias to Arduino Uno pins, but
+// for backward compatibility we map them to the SD card SPI.
+#define SPI_MOSI PTE3
+#define SPI_MISO PTE1
+#define SPI_SCK  PTE2
+#define SPI_CS   PTE4
+
+
 #ifdef __cplusplus
 }
 #endif

targets/targets.json

@@ -760,7 +760,7 @@
     },
     "K64F": {
         "supported_form_factors": [
-            "ARDUINO"
+            "ARDUINO_UNO"
         ],
         "components_add": [
             "SD",