Nucleo f722ze (#1526)

machine/nucleo-f722ze: Add support for ST Micro NUCLEO-F722ZE

targets/cortex-m7.json

@@ -0,0 +1,9 @@
+{
+	"inherits": ["cortex-m"],
+	"llvm-target": "armv7em-none-eabi",
+	"cflags": [
+		"--target=armv7em-none-eabi",
+		"-Qunused-arguments"
+	],
+	"gdb": "arm-none-eabi-gdb"
+}

targets/nucleo-f722ze.json

@@ -0,0 +1,11 @@
+{
+  "inherits": ["cortex-m7"],
+  "build-tags": ["nucleof722ze", "stm32f7x2", "stm32f7", "stm32"],
+  "linkerscript": "targets/stm32f7x2zetx.ld",
+  "extra-files": [
+    "src/device/stm32/stm32f7x2.s"
+  ],
+  "flash-method": "openocd",
+  "openocd-interface": "stlink-v2-1",
+  "openocd-target": "stm32f7x"
+}

targets/stm32f7x2zetx.ld

@@ -0,0 +1,10 @@
+
+MEMORY
+{
+    FLASH_TEXT (rw) : ORIGIN = 0x08000000, LENGTH = 512K
+    RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 256K
+}
+
+_stack_size = 4K;
+
+INCLUDE "targets/arm.ld"