Update README.md

Author: liyanboy74

README.md

@@ -4,6 +4,11 @@ An open API application for programming HCS301 EEPROM Code Hopping.
 
 ![HCS301 Programmer Software](https://user-images.githubusercontent.com/64005694/172905165-ddc48f12-c173-4eb3-8305-408ea8ab3ba6.jpg)
 
+## Download
+**[Download latest release](https://github.com/ioelectro/hcs-programmer-soft/releases)**
+
+*Required .NET Framework 4.7.2 or Upper.*
+
 ## Description
 This software requires an interface hardware that can write information to the IC.The information is sent to the interface IC via the com port using a usb to serial converter.
 
@@ -20,5 +25,35 @@ Immediately after opening the port, the software sends the character `!` and if
 response must send at below format:<br>
 `!` `DEVICE-NAME-(STRING)` `\n`
 
+#### Information to be programmed
+According to the information in the HCS datasheet, 12 WORD 16-bit should be set.<br>
+The sending packet contains 25 bytes that are sent as follows:<br>
+`>` `WORD0` `WORD1` `WORD2` `WORD3` `WORD4` `WORD5` `WORD6` `WORD7` `WORD8` `WORD9` `WORD10` `WORD11` <br>
+
+Sending this package does not require a response. Instead, the programmer can display the result, error or any message that is described in the following section.
+
 ### Receive
+The received packages consist of three main sections, which are shown below:<br>
+`TYPE-(Char)` `MESSAGE-(STRING)` `\n` <br>
+
+#### Packet TYPE
+- Log `<`
+- Info `i`
+- Warning `w`
+- Error `e`
+
+#### Example
+Print data to log:<br>
+`<` `HELLO` `\n`<br>
+
+Show Warning message:<br>
+`w` `Warning!` `\n`<br>
+
+### Hardware
+Any hardware that supports UART serial communication can be used as an interface and hardware. For example, ARDUINO PIC AVR STM8 are a good choice.
+
+
+If you have a open hardware project for this software, please let me know so I can share it.
+
+