Driver5509.rar_DSP C5509A_audio dsp_dsp DMA_parts2fp_welcome9qr

/*H*************************************************************************** * * $Archive:: /boards/dsk5509a/examples/dsk_app/dsk_app.c $ * $Revision:: 1 $ * $Date:: 11/10/05 11:13a $ * $Author:: Shilpab $ * * DESCRIPTION: * * * (C) Copyright 2005 by Spectrum Digital Incorporated * All rights reserved * *H***************************************************************************/ /* * ======== dsk_app.c ======== * * Version 0.90 * * This example digitally processes audio data from the line input on the * AIC23 codec and plays the result on the line output and headphone output. * It uses the McBSP and DMA to efficiently handle the data transfer without * significant intervention from the DSP. * * * Data transfer * * Audio data is transferred back and forth from the codec through McBSP0, * a bidirectional serial port. The DMA is configured to take every 16-bit * signed audio sample arriving on McBSP0 and store it in a buffer in memory * until it can be processed. Once it has been processed, it is sent back out * through McBSP0 to the codec for output. DMA channel 4 is used for * transmitting data to the codec and channel 5 is used to receive data from * the codec. * * The AIC23 codec is configured through the I2C interface. * * * Program flow * * When the program is run, the individual DSP/BIOS modules are initialized * as configured in dsk_app.cdb with the DSP/BIOS configuration tool. The * main( ) function is then called as the main user thread. In this example * main( ) performs application initialization and starts the DMA data * transfers. When main exits, control passes back entirely to DSP/BIOS * which services any interrupts or threads on an as-needed basis. When * there is no work to be done, the idle thread is run. * * The dmaHwiRcv( ) and dmaHwiXmp interrupt service routines are called when * buffers have been transmitted or received. is called when a buffer has been * filled. It contains a state variable named pingOrPong that indicates * whether the buffer is a PING or PONG buffer. dmaHwi switches the buffer * state to the opposite buffer and calls the SWI thread processBuffer to * process the audio data. */ /* * DSP/BIOS is configured using the DSP/BIOS configuration tool. Settings * for this example are stored in a configuration file called dsk_app.cdb. * At compile time, Code Composer will auto-generate DSP/BIOS related files * based on these settings. A header file called dsk_appcfg.h contains the * results of the autogeneration and must be included for proper operation. * The name of the file is taken from dsk_app.cdb and adding cfg.h. */ #include "aic23.h" /* * This program uses Code Composer's Chip Support Library to access * C55x peripheral registers and interrupt setup. The following * include files are required for the CSL modules. */ #include <csl.h> #include <csl_irq.h> #include <csl_dma.h> #include <csl_mcbsp.h> #include <csl_irq.h> #include <csl_gpio.h> #include <math.h> /* Noise pre-processing*/ /* In case, the system is connected to ARM through McBSP2 working under SPI mode*/ #define USE_SPI 1 /* Led out and data ready signaling to ARM to start the SPI data transfer */ #define USE_LED 1 /* Signalling led which will trigger the SPI communication with ARM */ #define LED_0 GPIO_PIN6 /* Constants for buffers */ /*Disable this define when including other files in Noise Reduction Package*/ #define FRAME 180 #define BUFFSIZE 2*FRAME #define BUFFERS 3 /* Function prototypes */ void initIrq( void ); void initDma( void ); void initMcbsp( void ); void setDmaSrc( DMA_Handle hDma, Int16 bufnum ); void setDmaDst( DMA_Handle hDma, Int16 bufnum ); /* Handles */ //The McBSP for communication with AIC23 DMA_Handle hDmaXmt; DMA_Handle hDmaRcv; MCBSP_Handle hMcbsp; #if (USE_SPI) //The McBSP working as SPI for communication with ARM DMA_Handle hDmaXmt2; //DMA_Handle hDmaRcv2; //we only use the transmit side MCBSP_Handle hMcbsp2; #endif //Int32 count = 0; /* Config Structures */ /* CSL config structure for DMAs */ static DMA_Config dmaCfgReceive = { DMA_DMACSDP_RMK( DMA_DMACSDP_DSTBEN_NOBURST, DMA_DMACSDP_DSTPACK_OFF, DMA_DMACSDP_DST_DARAM, //??? DMA_DMACSDP_SRCBEN_NOBURST, DMA_DMACSDP_SRCPACK_OFF, DMA_DMACSDP_SRC_PERIPH, DMA_DMACSDP_DATATYPE_16BIT ), /* DMACDSP */ DMA_DMACCR_RMK( DMA_DMACCR_DSTAMODE_POSTINC, DMA_DMACCR_SRCAMODE_CONST, DMA_DMACCR_ENDPROG_OFF, DMA_DMACCR_REPEAT_OFF, DMA_DMACCR_AUTOINIT_OFF, DMA_DMACCR_EN_STOP, DMA_DMACCR_PRIO_HI, DMA_DMACCR_FS_DISABLE, DMA_DMACCR_SYNC_REVT1 ), /* DMACCR */ DMA_DMACICR_RMK( DMA_DMACICR_BLOCKIE_OFF, DMA_DMACICR_LASTIE_OFF, DMA_DMACICR_FRAMEIE_ON, DMA_DMACICR_FIRSTHALFIE_OFF, DMA_DMACICR_DROPIE_OFF, DMA_DMACICR_TIMEOUTIE_OFF ), /* DMACICR */ (DMA_AdrPtr)((Uint32)(_MCBSP_DRR11_ADDR<<1)), /* DMACSSAL */ 0, /* DMACSSAU */ NULL, /* DMACDSAL, to be loaded by submit */ 0, /* DMACDSAU */ BUFFSIZE, /* DMACEN */ 1, /* DMACFN */ 0, /* DMACFI */ 0 /* DMACEI */ }; static DMA_Config dmaCfgTransmit = { DMA_DMACSDP_RMK( DMA_DMACSDP_DSTBEN_NOBURST, DMA_DMACSDP_DSTPACK_OFF, DMA_DMACSDP_DST_PERIPH, DMA_DMACSDP_SRCBEN_NOBURST, DMA_DMACSDP_SRCPACK_OFF, DMA_DMACSDP_SRC_DARAM, //??? DMA_DMACSDP_DATATYPE_16BIT ), /* DMACDSP */ DMA_DMACCR_RMK( DMA_DMACCR_DSTAMODE_CONST, DMA_DMACCR_SRCAMODE_POSTINC, DMA_DMACCR_ENDPROG_OFF, DMA_DMACCR_REPEAT_OFF, DMA_DMACCR_AUTOINIT_OFF, DMA_DMACCR_EN_STOP, DMA_DMACCR_PRIO_HI, DMA_DMACCR_FS_DISABLE, DMA_DMACCR_SYNC_XEVT1 ), /* DMACCR */ DMA_DMACICR_RMK( DMA_DMACICR_BLOCKIE_OFF, DMA_DMACICR_LASTIE_OFF, DMA_DMACICR_FRAMEIE_ON, DMA_DMACICR_FIRSTHALFIE_OFF, DMA_DMACICR_DROPIE_OFF, DMA_DMACICR_TIMEOUTIE_OFF ), /* DMACICR */ NULL, /* DMACSSAL */ 0, /* DMACSSAU */ (DMA_AdrPtr)((Uint32)(_MCBSP_DXR11_ADDR<<1)),/* DMACDSAL */ 0, /* DMACDSAU */ BUFFSIZE, /* DMACEN */ 1, /* DMACFN */ 0, /* DMACFI */ 0 /* DMACEI */ }; #if (USE_SPI) static DMA_Config dmaCfgTransmit2 = { DMA_DMACSDP_RMK( DMA_DMACSDP_DSTBEN_NOBURST, DMA_DMACSDP_DSTPACK_OFF, DMA_DMACSDP_DST_PERIPH, DMA_DMACSDP_SRCBEN_NOBURST, DMA_DMACSDP_SRCPACK_OFF, DMA_DMACSDP_SRC_DARAM, //??? DMA_DMACSDP_DATATYPE_16BIT ), /* DMACDSP */ DMA_DMACCR_RMK( DMA_DMACCR_DSTAMODE_CONST, DMA_DMACCR_SRCAMODE_POSTINC, DMA_DMACCR_ENDPROG_OFF, DMA_DMACCR_REPEAT_OFF, DMA_DMACCR_AUTOINIT_OFF, DMA_DMACCR_EN_STOP,