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resources:tools-software:sharc-audio-module:baremetal:matlab_volume_control [19 Aug 2019 22:11] Chad Wentworth [Generating C Code with Matlab Coder] |
resources:tools-software:sharc-audio-module:baremetal:matlab_volume_control [19 Aug 2019 22:26] Chad Wentworth |
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| - | =====Using a Matlab Volume Control Function in the Framework===== | + | =====Using a MATLAB Volume Control Function in the Framework===== |
| - | Matlab gives users the ability to create powerful audio algorithms. This tutorial gives an overview of how to create a simple volume control function and then add it to the baremetal framework. | + | MATLAB gives users the ability to create powerful audio algorithms. This tutorial gives an overview of how to create a simple volume control function and then add it to the baremetal framework. |
| <WRAP round 60% important> | <WRAP round 60% important> | ||
| - | All Matlab work was using version R2018b | + | All MATLAB work was using version R2018b |
| </WRAP> | </WRAP> | ||
| - | ====Creating a Function in Matlab==== | + | ====Creating a Function in MATLAB==== |
| From the **Home** tab choose **New::Function** and then overwrite all template contents with the following: | From the **Home** tab choose **New::Function** and then overwrite all template contents with the following: | ||
| <code>function audio_out = volume_control( audio_in, vol_ctrl_factor ) | <code>function audio_out = volume_control( audio_in, vol_ctrl_factor ) | ||
| Line 18: | Line 18: | ||
| This function takes an input audio channel, multiplies it by vol_ctrl_factor and stores the result in the output audio channel. It simply changes the volume. Notice that we don't use a for loop because MATLAB has built in implicit expansion for scalar * vector multiplication. The file name should match the function name so name the file volume_control. | This function takes an input audio channel, multiplies it by vol_ctrl_factor and stores the result in the output audio channel. It simply changes the volume. Notice that we don't use a for loop because MATLAB has built in implicit expansion for scalar * vector multiplication. The file name should match the function name so name the file volume_control. | ||
| - | ====Testing the Newly Created Function in Matlab==== | + | ====Testing the Newly Created Function in MATLAB==== |
| - | In order for Matlab Coder to know what the input variable types are and to verify the function is working properly, a test script needs to be created. From the **Home** tab choose **New::Script** and copy the following contents into the window: | + | In order for MATLAB Coder to know what the input variable types are and to verify the function is working properly, a test script needs to be created. From the **Home** tab choose **New::Script** and copy the following contents into the window: |
| <code>AUDIO_BLOCK_SIZE = int32(32); | <code>AUDIO_BLOCK_SIZE = int32(32); | ||
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| - | ====Generating C Code with Matlab Coder==== | + | ====Generating C Code with MATLAB Coder==== |
| <WRAP round 60% important> | <WRAP round 60% important> | ||
| Line 54: | Line 54: | ||
| - Now the code can be generated | - Now the code can be generated | ||
| - **Build type** should be set to **Source Code** | - **Build type** should be set to **Source Code** | ||
| - | - **Language** should be **C plus plus** | + | - **Language** should be **C plus plus*** |
| - Change **Hardware Board** to **None - Select device below** | - Change **Hardware Board** to **None - Select device below** | ||
| - **Device vendor** should be **Analog Devices** | - **Device vendor** should be **Analog Devices** | ||
resources/tools-software/sharc-audio-module/baremetal/matlab_volume_control.txt · Last modified: 19 Aug 2019 22:26 by Chad Wentworth