micropython: add micropython component

components/language/micropython/examples/unix/ffi_example.py

@@ -0,0 +1,41 @@
+import ffi
+import uctypes
+
+libc = ffi.open("libc.so.6")
+print("libc:", libc)
+print()
+
+# Declare few functions
+perror = libc.func("v", "perror", "s")
+time = libc.func("i", "time", "p")
+open = libc.func("i", "open", "si")
+qsort = libc.func("v", "qsort", "piiC")
+# And one variable
+errno = libc.var("i", "errno")
+
+print("time:", time)
+print("UNIX time is:", time(None))
+print()
+
+perror("perror before error")
+open("somethingnonexistent__", 0)
+print("errno object:", errno)
+print("errno value:", errno.get())
+perror("perror after error")
+print()
+
+
+def cmp(pa, pb):
+    a = uctypes.bytearray_at(pa, 1)
+    b = uctypes.bytearray_at(pb, 1)
+    print("cmp:", a, b)
+    return a[0] - b[0]
+
+
+cmp_cb = ffi.callback("i", cmp, "PP")
+print("callback:", cmp_cb)
+
+s = bytearray(b"foobar")
+print("org string:", s)
+qsort(s, len(s), 1, cmp_cb)
+print("qsort'ed string:", s)

components/language/micropython/examples/unix/machine_bios.py

@@ -0,0 +1,9 @@
+# This example shows how to access Video BIOS memory area via machine.mem
+# It requires root privilege and x86 legacy harfware (which has mentioned
+# Video BIOS at all).
+# It is expected to print 0xaa55, which is a signature at the start of
+# Video BIOS.
+
+import umachine as machine
+
+print(hex(machine.mem16[0xC0000]))