Glen, I used only CODEC2_MODE_1200.
What IDE for STM32 you use?
>Понедельник, 19 сентября 2016, 12:37 +03:00 от glen english
><g...@cortexrf.com.au>:
>
>Hi Marat
>
>My *simplistic * observations is that these are due to variations
in the FPUs/ rounding error/ bias.
>
>What codec bit are these variations in ?
>
>IE
>for codec2 1200 :
> The bit allocation is:
>
> Parameter frame 2 frame 4 Total
> -------------------------------------------------------
> Harmonic magnitudes (LSPs) 0 27 27
> Energy+Wo 8 8 16
> Voicing (10ms update) 2 2 4
> Spare 0 1 1
> TOTAL 10 38 48
>
>
>regards
>
>
>On 19/09/2016 7:12 PM, Marat Galyamov
wrote:
>>Hello, Glen.
>>
>>In Windows I use CodeBlocks IDE with MinGW compiler, info from
readme-file :
>>
>>=== TDM-GCC Compiler Suite for Windows ===
>>--- GCC 4.6 & 4.7 Series ---
>>*** Standard MinGW 32-bit Edition ***
>>For microcontroler I use IAR IDE (iar.com) with her own compiler.
>>I experiment with STM32F746-Discovery board.
>>
>>
>>In CodeBlocks IDE I switched off optimization.
>>
>>In IAR IDE I have turned on optimization in Mdeium level.
>>I left settings of a linker by default, but I have increased the
sizes of a stack and heap.
>>
>> STM32F746NG has single precision FPU.
>>
>>I made a screenshot - compared two output files, version from
PC and version from STM32.
>>All incoincident bytes differ on one value. Sorry for my english.
>>
>>>Суббота, 17 сентября 2016, 1:57 +03:00 от
glen english <g...@cortexrf.com.au> :
>>>
>>>Hi Merit
>>>
>>>you could be looking at the difference in the floating
point units
>>>between the processors- the F7 and the F4 have slightly
different versions.
>>>
>>>What compiler- linker processor flags have you used -?
>>>
>>>If you use the F4 processor flags you may almost
certainly get a
>>>different / wrong result..
>>>
>>>In addition to very subtle differences, some of the F7s
have double
>>>precision FPUs instead of single precision FPUs
>>>
>>>do you have doubles forced to floats ?
>>>
>>>have you a verification method / check in place to
ensure you are not
>>>blowing/ overwriting memory somewhere ?
>>>
>>>
>>>g
>>>
>>>
>>>
>>>
>>>On 17/09/2016 6:38 AM, Marat Galyamov wrote:
>>>>
>>>> Hello.
>>>> I try to use the Codec2 on the STM32F746
microcontroller. For a start,
>>>> I took files of the codec and collected the project
for the PC in the
>>>> CodeBlocks IDE with the compiler GCC.
>>>>
>>>> Coding and decoding of the raw-file took place
successfully, the
>>>> regenerated file has high quality.
>>>>
>>>> Then I collected the project in the IAR IDE (for
STM32F746-Discovery
>>>> board) and added
>>>>
>>>
>>>
>>>
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>>
>>
>>
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