esp8266: New port of Micro Python to ESP8266 wifi module.
diff --git a/esp8266/etshal.h b/esp8266/etshal.h
new file mode 100644
index 0000000..5ee67d0
--- /dev/null
+++ b/esp8266/etshal.h
@@ -0,0 +1,10 @@
+#ifndef _INCLUDED_ETSHAL_H_
+#define _INCLUDED_ETSHAL_H_
+
+void ets_isr_unmask();
+void ets_install_putc1();
+void ets_isr_attach();
+void uart_div_modify();
+uint32_t ets_get_cpu_frequency();
+
+#endif // _INCLUDED_ETSHAL_H_