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# Compiling the firmware
## Setup development environment
1. Download and install [Z-STACK-HOME 1.2.2a ](http://www.ti.com/tool/z-stack-archive ).
2. Download and install [IAR Embedded Workbench for 8051 ](https://www.iar.com/iar-embedded-workbench/#!?architecture=8051 ).
*NOTE: For IAR Embedded Workbench for 8051 you need either the full (paid) version or the 30-days evaluation version.*
## Compiling
1. Copy `firmware.patch` to `Z-Stack Home 1.2.2a.44539`
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2. Open Git Bash, go to `Z-Stack Home 1.2.2a.44539` and apply the patch using `git apply firmware.patch --ignore-space-change` .
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3. Open `Z-Stack Home 1.2.2a.44539\Projects\zstack\ZNP\CC253x\znp.eww` with IAR Embedded workbench for 8051.
4. You will get a warning: *The project file 'CC253(0/1).ewp' is in an old format. Would you like to convert it for use with this version?* . Press **yes** for both.
5. Select the correct target:
- For CC2531 select *CC2531 - X*
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- For CC2530, CC2530_CC2591, CC2530_CC2592 select *CC2530 - X*
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- Depending if you want to compile the `.hex` or SBL firmware select *- ProdHex* or *- ProdSBL*
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6. Right-click on your target and press options. Go to C/C++ compiler -> preprocessor. **Remove** all *Defined symbols* and depending on what you want to compile, add the following symbols to *Defined symbols* :
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- Device type: `FIRMWARE_CC2530` , `FIRMWARE_CC2530_CC2591` , `FIRMWARE_CC2531` or `FIRMWARE_CC2530_CC2592`
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- If you chose for *- ProdSBL* add `FIRMWARE_SBL` .
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- In case you want to compile the source routing firmware, also add `SOURCE_ROUTING` .
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7. Press OK.
8. Right-click on your target and click *Rebuild all* .
9. Once finished, you can find the `CC253(0|1)ZNP-Prod.(hex|bin)` file in `Z-Stack Home 1.2.2a.44539\Projects\zstack\ZNP\CC253x\dev` .
