esptool.py for GR-LYCHEE CDC ACM

gistfile1.txt

$ diff -up esptool.py.orig esptool.py
--- esptool.py.orig     2017-04-23 23:17:06.861069200 +0900
+++ esptool.py  2017-05-01 00:42:24.731308500 +0900
@@ -125,7 +125,9 @@ class ESPLoader(object):
     # Maximum block sized for RAM and Flash writes, respectively.
     ESP_RAM_BLOCK   = 0x1800

-    FLASH_WRITE_SIZE = 0x400
+    #workaround for GR-LYCHEE CDC ACM
+#    FLASH_WRITE_SIZE = 0x400
+    FLASH_WRITE_SIZE = 32

     # Default baudrate. The ROM auto-bauds, so we can use more or less whatever we want.
     ESP_ROM_BAUD    = 115200
@@ -319,6 +321,8 @@ class ESPLoader(object):
             time.sleep(0.05)
             self._port.setDTR(False)  # IO0=HIGH, done

+        #workaround for GR-LYCHEE CDC ACM
+        self._port.setDTR(True)
         self._port.timeout = 0.1
         for _ in range(5):
             try: