6713DSP_EDMA.rar_6713_EDMA MCASP

/********************************************************************************* * Copyright 2003 by SEED Electronic Technology Ltd. * All rights reserved. Property of SEED Electronic Technology Ltd. * * Designed by: Hongshuai.Li * *********************************************************************************/ /* FILENAME...... DEC6713_EDMA.c * DATE CREATED.. 21/12/2004 * LAST MODIFIED. 21/12/2004 *------------------------------------------------------------------------------ * This program uses the timer to trigger EDMA events. These events in turn * trigger linked EDMA parameter tables to fill a ping pong buffer structure. * On running the program you'll note that the program bounces between the ping * and pong buffers filling each with a value that comes from the source. * (Note: This example runs with CACHE enable). \******************************************************************************/ #include <stdio.h> #include <csl.h> #include <csl_cache.h> #include <csl_edma.h> #include <csl_timer.h> #include <csl_irq.h> #include <DEC6713.h> /*----------------------------------------------------------------------------*/ /* Pick which EDMA transfer completion interrupt we want to use */ #define TCCINTNUM 10 /* define the constants */ #define BUFF_SZ 256 /* ping-pong buffer sizes in # of ints */ #define FCPU 150000000 /* CPU clock frequency */ #define SRATE 8000 /* data sample rate (simulated w/timer */ #define TPRD (FCPU/(4*SRATE)) /* timer period */ #define TRANSFER_CNT 20 /* Transfer count */ /* Create the buffers. We want to align the buffers to be cache friendly */ /* by aligning them on an L2 cache line boundary. */ #pragma DATA_ALIGN(ping,128); #pragma DATA_ALIGN(pong,128); #pragma DATA_ALIGN(outbuff,128); int ping[BUFF_SZ]; int pong[BUFF_SZ]; int outbuff[BUFF_SZ]; /* These two variables serve as the data sources for this example. */ /* Also want to align these on a cache line boundary since they */ /* sources of EDMA transfers. */ #pragma DATA_ALIGN(ping_data,128); #pragma DATA_ALIGN(pong_data,128); static int ping_data; static int pong_data; /* global variable used to track the ping-pong'ing */ static int pingpong = 0; volatile int transferCount = 0; extern far void vectors(); void setupInterrupts(void); void stopEdma(void); /* function used to stop EDMA */ /*-------------------------------------------------------------------------*/ /* declare the CSL objects */ TIMER_Handle hTimer; /* Handle for the timer device */ EDMA_Handle hEdma; /* Handle for the EDMA channel */ EDMA_Handle hEdmaPing; /* Handle for the ping EDMA reload parameters */ EDMA_Handle hEdmaPong; /* Handle for the pong EDMA reload parameters */ EDMA_Config cfgEdma; /* EDMA configuration structure */ /* Create the EDMA configuration structure for ping transfers */ EDMA_Config cfgEdmaPing = { EDMA_OPT_RMK( /* Making Options parameter register - EDMA_OPT */ EDMA_OPT_PRI_LOW, /* Priority levels for EDMA events:- EDMA_OPT_PRI_LOW - Low priority EDMA transfer EDMA_OPT_PRI_HIGH - High priority EDMA transfer*/ EDMA_OPT_ESIZE_32BIT,/* Element size :- EDMA_OPT_ESIZE_32BIT - 32 bit word EDMA_OPT_ESIZE_16BIT - 16 bit word EDMA_OPT_ESIZE_8BIT - 8 bit word */ EDMA_OPT_2DS_NO, /* Source dimension :- EDMA_OPT_2DS_NO - 1-dimensional source EDMA_OPT_2DS_YES - 2-dimensional source */ EDMA_OPT_SUM_NONE, /* Source address update mode :- EDMA_OPT_SUM_NONE - Fixed address mode EDMA_OPT_SUM_INC - Increment address mode EDMA_OPT_SUM_DEC - Decrement address mode EDMA_OPT_SUM_IDX - Address modified by element index or frame Index */ EDMA_OPT_2DD_NO, /* Destination dimension :- EDMA_OPT_2DD_NO - 1-dimensional source EDMA_OPT_2DD_YES - 2-dimensional source */ EDMA_OPT_DUM_INC, /* Destination address update mode :- EDMA_OPT_DUM_NONE - Fixed address mode EDMA_OPT_DUM_INC - Increment address mode EDMA_OPT_DUM_DEC - Decrement address mode EDMA_OPT_DUM_IDX - Address modified by element index or frame Index */ EDMA_OPT_TCINT_YES, /* Transfer complete interrupt :- EDMA_OPT_TCINT_NO - Indication disabled EDMA_OPT_TCINT_YES - Indication enabled */ EDMA_OPT_TCC_OF(TCCINTNUM),/* Transfer complete code */ EDMA_OPT_LINK_YES, /* Linking of event parameters EDMA_OPT_LINK_NO - Disabled EDMA_OPT_LINK_YES - Enabled */ EDMA_OPT_FS_NO /* Frame synchronization EDMA_OPT_FS_NO - Channel is element/array synchronized EDMA_OPT_FS_YES - Channel is frame synchronized*/ ), EDMA_SRC_OF(&ping_data),/* Source address register &ping_data - source address */ EDMA_CNT_OF(BUFF_SZ), /* Transfer count parameter BUFF_SZ - buffer sizes in # of ints */ EDMA_DST_OF(ping), /* Destination address parameter ping - destination address */ EDMA_IDX_OF(0x00000004),/* Index parameter */ EDMA_RLD_OF(0x00000000) /* Count reload/link parameter */ }; /* Create the EDMA configuration structure for pong transfers */ EDMA_Config cfgEdmaPong = { EDMA_OPT_RMK( /* Making Options parameter register - EDMA_OPT */ EDMA_OPT_PRI_LOW, /* Priority levels for EDMA events:- EDMA_OPT_PRI_LOW - Low priority EDMA transfer EDMA_OPT_PRI_HIGH - High priority EDMA transfer */ EDMA_OPT_ESIZE_32BIT,/* Element size :- EDMA_OPT_ESIZE_32BIT - 32 bit word EDMA_OPT_ESIZE_16BIT - 16 bit word EDMA_OPT_ESIZE_8BIT - 8 bit word */ EDMA_OPT_2DS_NO, /* Source dimension :- EDMA_OPT_2DS_NO - 1-dimensional source EDMA_OPT_2DS_YES - 2-dimensional source */ EDMA_OPT_SUM_NONE, /* Source address update mode :- EDMA_OPT_SUM_NONE - Fixed address mode EDMA_OPT_SUM_INC - Increment address mode EDMA_OPT_SUM_DEC - Decrement address mode EDMA_OPT_SUM_IDX - Address modified by element index or frame Index */ EDMA_OPT_2DD_NO, /* Destination dimension :-