update

Author: TopgunZh

README.md

@@ -1,7 +1,9 @@
-# Swift Pro Firmware V4.1.0 (Base on [Grbl v0.9j](https://github.com/grbl/grbl) )
+# Swift Pro Firmware V4.1.1 (Base on [Grbl v0.9j](https://github.com/grbl/grbl) )
 
 ----------
-
+## Update Summary for v4.1.1
+* Fix cmd M17 bug
+* Add out of step back features
 ## Update Summary for v4.1.0
 * Transplant Grbl framework.
 * Optimize stepper motor performance,improve motor speed,fix motor shake.
@@ -48,7 +50,7 @@ not support currently **P2240,P2241**.
 * Open XLoader and select your uArm's COM port from the drop down menu on the lower left.
 * Select the appropriate device from the dropdown list titled "Device".
 * Check that Xloader set the correct baud rate for the device: 115200 for Mega (ATMEGA2560).
-* Now use the browse button on the top right of the form to browse to your grbl hex file.
+* Now use the browse button on the top right of the form to browse to your hex file.
 * Once your hex file is selected, click "Upload"
 The upload process generally takes about 10 seconds to finish. Once completed, a message will appear in the bottom left corner of XLoader telling you how many bytes were uploaded. If there was an error, it would show instead of the total bytes uploaded. Steps should be similar and may be done through the command prompt.