DFSDM Output resolution
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‎2023-03-02 01:34 AM
When I use DFSDM, I configure FOSR= 256 ISOR=1 and the output is outside the range in the reference guide +-16777216
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‎2023-03-02 04:35 AM
Get the answer
/* Regular conversion value is a signed value located on 24 MSB of register */
/* So after applying a mask on these bits we have to perform a division by 256 (2 raised to the power of 8) */
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‎2023-03-02 01:56 AM
Hello @GWenJ.1​ and welcome to the Community :)
Please specify which device used?
You can check the STM32Cube package which providing DFSDM example that can help you on the DFSDM usage and configuration.
Imen
Thanks
Imen
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‎2023-03-02 02:33 AM
STM32H723
The STM32Cube H7 package which providing DFSDM example,Only refer a applicableation About Audio
Can you verify the range of DFSDM output results at FORD=3 FOSR=256 ISOR=1 ?
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‎2023-03-02 03:28 AM
A
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‎2023-03-02 04:35 AM
Get the answer
/* Regular conversion value is a signed value located on 24 MSB of register */
/* So after applying a mask on these bits we have to perform a division by 256 (2 raised to the power of 8) */