/********************************************************************* * Flowcode DSP FFT Code * * File: DSP_FFT.c * * (c) 2009 Matrix Multimedia Ltd. * http://www.matrixmultimedia.com * * Software License Agreement * * The software supplied herewith by Matrix Multimedia Ltd (the * “Company”) for its Flowcode graphical programming language is * intended and supplied to you, the Company’s customer, for use * solely and exclusively on the Company's products. The software * is owned by the Company, and is protected under applicable * copyright laws. All rights are reserved. Any use in violation * of the foregoing restrictions may subject the user to criminal * sanctions under applicable laws, as well as to civil liability * for the breach of the terms and conditions of this licence. * * THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES, * WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED * TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT, * IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. * * Changelog: * * date | by | description * -------+----+----------------------------------------------------- * 051012 | BR | Created * 301012 | ST | Fixed some minor defines issues * 301012 | ST | Removed Inverse_FTT and Rewrote to call global FFT function in the System.c file * 011112 | ST | Made #errors clearer * | | * | | ********************************************************************/ /********************************************************************* Return & parameter types: void char short char* Pin directions: 0 = OUTPUT 2 = INPUT 3 = BIDIRECTIONAL ********************************************************************** [Settings] CLSID={49046B6C-5003-4FED-ABAE-671F5CD1C203} IsAnalogue=0 MultipleAllowed=1 Description=DSP FFT Flowcode Component ********************************************************************** [Port] DesiredPort=0 PortMandatory=0 SamePortAsID=0 [Pins] Count=0 [PinPort] # PORTA = 0 # PORTB = 1 # PORTC = 2 # PORTD = 3 # PORTE = 4 [PinDesiredBit] [PinDirection] # DIR_INPUT = 2 # DIR_OUTPUT = 0 # DIR_BIDIRECTIONAL = 3 [PinMustUsePort] # boolean [SamePortAsPinX] # -1 = any pin # otherwise, the pin number [PinMustUsePin] # boolean [PinValue] # boolean (0 = off, 1 = on) ********************************************************************** [MacroNames] Count=1 1=FFT [MacroReturns] 1=void [MacroIsPrivate] 1=0 [MacroParameters_FFT] Count=0 [MacroParamTypes_FFT] ********************************************************************/ /******************************************************************** * ADDITIONAL CODE ********************************************************************/ /*DefinesCode_Start*/ /**** Macro Substitutions **** a = Unique Reference b = Input data buffer (time domain) c = Output data buffer (frequency domain) ******************************/ //common defines #define %a_INPUT_BUFFER_NAME MXBUF_%b #define %a_INPUT_BUFFER_LEN MXBUFSZ_%b #define %a_INPUT_BUFFER_SIGN MXBUFSIGN_%b #define %a_INPUT_BUFFER_BITS MXBUFBITS_%b #define %a_INPUT_BUFFER_DOM MXBUFDOM_%b #define %a_OUTPUT_BUFFER_REAL_NAME MXBUF_%c #define %a_OUTPUT_BUFFER_IMAG_NAME MXBUF_IM_%c #define %a_OUTPUT_BUFFER_LEN MXBUFSZ_%c #define %a_OUTPUT_BUFFER_SIGN MXBUFSIGN_%c #define %a_OUTPUT_BUFFER_BITS MXBUFBITS_%c #define %a_OUTPUT_BUFFER_DOM MXBUFDOM_%c //Sample Buffer Size Must Be A Power Of 2!!! #if(%a_INPUT_BUFFER_LEN == 4) #define %a_FFT_SAMPLE_POWER 2 #endif #if(%a_INPUT_BUFFER_LEN == 8) #define %a_FFT_SAMPLE_POWER 3 #endif #if(%a_INPUT_BUFFER_LEN == 16) #define %a_FFT_SAMPLE_POWER 4 #endif #if(%a_INPUT_BUFFER_LEN == 32) #define %a_FFT_SAMPLE_POWER 5 #endif #if(%a_INPUT_BUFFER_LEN == 64) #define %a_FFT_SAMPLE_POWER 6 #endif #if(%a_INPUT_BUFFER_LEN == 128) #define %a_FFT_SAMPLE_POWER 7 #endif #if(%a_INPUT_BUFFER_LEN == 256) #define %a_FFT_SAMPLE_POWER 8 #endif #if(%a_INPUT_BUFFER_LEN == 512) #define %a_FFT_SAMPLE_POWER 9 #endif #if(%a_INPUT_BUFFER_LEN == 1024) #define %a_FFT_SAMPLE_POWER 10 #endif #if(%a_INPUT_BUFFER_LEN == 2048) #define %a_FFT_SAMPLE_POWER 11 #endif #if(%a_INPUT_BUFFER_LEN == 4096) #define %a_FFT_SAMPLE_POWER 12 #endif #ifndef %a_FFT_SAMPLE_POWER #define %a_FFT_SAMPLE_POWER 1 //Solves other less specific compilation errs #error "%a: input buffer size must be a power of 2 and contain at least 4 samples." #endif #if (%a_INPUT_BUFFER_LEN != %a_OUTPUT_BUFFER_LEN) #error "%a: output buffer size must match the input buffer." #endif #if (%a_INPUT_BUFFER_BITS != %a_OUTPUT_BUFFER_BITS) #error "%a: output buffer type must match the input buffer." #endif #if (%a_INPUT_BUFFER_SIGN != 1) #error "%a: input buffer size must be signed." #endif #if (%a_OUTPUT_BUFFER_SIGN != 1) #error "%a: output buffer size must be signed." #endif #if (%a_INPUT_BUFFER_DOM != 0) #error "%a: input buffer must be time-domain." #endif #if (%a_OUTPUT_BUFFER_DOM != 1) #error "%a: output buffer must be frequency-domain." #endif //#warning "DSP_FFT general note - Buffers should be signed and input waveform should be scaled so it is shifted around 0." /*DefinesCode_End*/ /*InitialisationCode_Start*/ /*InitialisationCode_End*/ /*InterruptCode_Start*/ /*InterruptCode_End*/ /******************************************************************** * FUNCTIONS ********************************************************************/ void FFT() { /*Macro_FFT_Start*/ #if (%a_INPUT_BUFFER_BITS == 8) MXDSP_FFT_8(1, %a_FFT_SAMPLE_POWER, %a_INPUT_BUFFER_NAME, %a_OUTPUT_BUFFER_REAL_NAME, %a_OUTPUT_BUFFER_IMAG_NAME); #endif #if (%a_INPUT_BUFFER_BITS == 16) MXDSP_FFT_16(1, %a_FFT_SAMPLE_POWER, %a_INPUT_BUFFER_NAME, %a_OUTPUT_BUFFER_REAL_NAME, %a_OUTPUT_BUFFER_IMAG_NAME); #endif /*Macro_FFT_End*/ }