View source for Firmware Compile Instruction -- STM32

=Introduction=
This introduction is to show how to compile the source code for Dragino's stm32 base products. 

=Set Up Build Environment=
==Set up Keil Compile Environment==
Assuming you already have [https://www.keil.com/demo/eval/arm.htm Keil uVision5] installed, the steps below show how to install the MDK support and get a license. 

1. Open the Webpage:  [http://www2.keil.com/stmicroelectronics-stm32/mdk http://www2.keil.com/stmicroelectronics-stm32/mdk]

2. Download the '''Keil MDK''', record the '''PSN''' here, we will use it later. 
[[File:Keil_1.png|600px|none|thumb|Download Keil MDK]]

3. Login with an account that has administration rights.

4. Right-click the µVision icon and select '''Run as Administrator'''… from the context menu.


5: Open the dialog '''File — License Management…''' and select the '''Single-User License''' tab.
[[File:Keil_2.png|600px|none|thumb|Install Keil]]
 

6: Click the button '''Get LIC via Internet...''', then click the button '''OK''' to register the product. This action opens the License Management page on the Keil web site.
[[File:Keil_3.png|600px|none|thumb|Install Keil]]

7.Enter the '''Product Serial Number''' (from step 2.) 4RMW3-A8FIW-TUBLG along with your contact information and click the button Submit. An e-mail is sent back with the License ID Code (LIC) within a few minutes.
[[File:Keil_4.png|600px|none|thumb|Input PSN]]

[[File:Keil_5.png|600px|none|thumb|Active via mail]]

[[File:Keil_6.png|600px|none|thumb|Active via mail]]

8. To activate the Software Product, '''enter the LIC''' in the field '''New License ID Code (LIC)''' of the dialog '''License Management…''' and click '''Add LIC'''.
[[File:Keil_7.png|600px|none|thumb|Add LIC]]

9. Finish Install Keil
[[File:Keil_8.png|600px|none|thumb|Finish install Keil]]

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==Install STM32L0 Series Device in Keil==
1: Open the webpage: [https://www.keil.com/dd2/stmicroelectronics/stm32l072cztx/#/eula-container https://www.keil.com/dd2/stmicroelectronics/stm32l072cztx/#/eula-container];

2: Find STMicroelectronics '''STM32L0 Series Device''' and download it.
[[File:Keil_9.png|600px|none|thumb|Finish install Keil]]

3: Find the Software Pack and install it.
[[File:Keil_10.png|600px|none|thumb|Install the downloaded pack in Keil]]

[[File:Keil_11.png|600px|none|thumb|Install the downloaded pack in Keil]]

4: Add the Device, then you can '''rebuild''' the project.
[[File:Keil_12.png|600px|none|thumb|rebuild project]]

Note: If you don’t add the Device, then Keil will report this error:
[[File:Keil_13.png|600px|none|thumb|Error without Device]]

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=Get and compile Source Code=
*Get the source code for the product. 
*Use Keil to open the project file. 
*You can see the libraries related for example NBSN50 project as below:
[[File:Keil_14.png|600px|none|thumb|project files]]

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=Video Reference=
https://youtu.be/ctdUNx4XCEg

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=Frequency Ask Questiones (FAQ)=
==How to change the frequency band for LoRaWAN source code==

In Keil, you can see what frequency band the code support. 
[[File:STM32_FAQ_1.png|600px|none|thumb|Support Frequency]]



If you want to change frequency, modify the Preprocessor Symbols. For example, change EU868 to US915 to complie a US915 firmware. 

[[File:STM32_FAQ_2.png|600px|none|thumb|Change Marco for frequency]]