daplink_flash: Add erase flash example.

Author: nedseb

lib/daplink_flash/examples/erase_flash.py

@@ -0,0 +1,18 @@
+"""Erase all data from the flash memory."""
+
+from machine import I2C
+from time import sleep_ms
+from daplink_flash import DaplinkFlash
+
+i2c = I2C(1)
+flash = DaplinkFlash(i2c)
+
+name, ext = flash.get_filename()
+print("Current file: {}.{}".format(name, ext))
+
+print("Erasing flash...")
+flash.clear_flash()
+sleep_ms(1000)
+
+print("Done. Flash is empty.")
+print("ERROR: 0x{:02X}".format(flash._error()))