我用dmaRcv来搬运SD卡的数据到DARAM,用dmaXmt将DARAM中的数据搬运到MCBSP（接着AIC23），可是dmaXmt无法正常工作，加上这句配置的语句 DMA_config(hDmaRcv,&dmaXmtConfig);
dmaRcv就不能进入中断，去掉就行，程序代码如下
/******************************************************************************/
/* Copyright 2004 by SEED Electronic Technology LTD. */
/* All rights reserved. SEED Electronic Technology LTD. */
/* Restricted rights to use, duplicate or disclose this code are */
/* granted through contract. */
/* */
/* */
/******************************************************************************/
/*----------------------------------------------------------------------------*/
/* DESCRIPTION: */
/* */
/* This is an example for EMIF of C5509 */
/*----------------------------------------------------------------------------*/
/* MODULE NAME... I2C and Mcbsp */
/* FILENAME...... codec.c */
/* DATE CREATED.. Mon 02/4/2004 */
/* COMPONENT..... */
/* PREREQUISITS.. */
/*----------------------------------------------------------------------------*/
/* DESCRIPTION: */
/* */
/* this example is that the codec is controled by the I2C and Mcbsp */
/*----------------------------------------------------------------------------*/
#include <csl.h>
#include <csl_i2c.h>
#include <stdio.h>
#include <csl_pll.h>
#include <csl_mcbsp.h>
#include <csl_mmc.h>
#include <csl_dma.h>
#include <csl_irq.h>
#define CODEC_ADDR 0x1A
#pragma DATA_SECTION(mmc0,"cslmem")
MMC_Handle mmc0;
MMC_CardObj *card, cardalloc;
MMC_CardIdObj *cid, cardid;
//MMC_callBackObj *callback;
int count, retVal;
Uint16 rca;
Uint16 cardtype;
#define N 256
#pragma DATA_SECTION(xmt,"dmaMem")
Uint16 xmt[N];
#pragma DATA_SECTION(rcv,"dmaMem")
Uint16 rcv[N];
/*锁相环的设置*/
PLL_Config myConfig = {
0, //IAI: the PLL locks using the same process that was underway
//before the idle mode was entered
1, //IOB: If the PLL indicates a break in the phase lock,
//it switches to its bypass mode and restarts the PLL phase-locking
//sequence
12, //PLL multiply value; multiply 24 times
1 //Divide by 2 PLL divide value; it can be either PLL divide value
//(when PLL is enabled), or Bypass-mode divide value
//(PLL in bypass mode, if PLL multiply value is set to 1)
};
MCBSP_Config Mcbsptest;
/*McBSP set,we use mcbsp1 to send and recieve the data between DSP and AIC23*/
MCBSP_Config Mcbsp1Config = {
MCBSP_SPCR1_RMK(
MCBSP_SPCR1_DLB_OFF, /* DLB = 0,禁止自闭环方式 */
MCBSP_SPCR1_RJUST_LZF, /* RJUST = 2 */
MCBSP_SPCR1_CLKSTP_DISABLE, /* CLKSTP = 0 */
MCBSP_SPCR1_DXENA_ON, /* DXENA = 1 */
0, /* ABIS = 0 */
MCBSP_SPCR1_RINTM_RRDY, /* RINTM = 0 */
0, /* RSYNCER = 0 */
MCBSP_SPCR1_RRST_DISABLE /* RRST = 0 */
),
MCBSP_SPCR2_RMK(
MCBSP_SPCR2_FREE_NO, /* FREE = 0 */
MCBSP_SPCR2_SOFT_NO, /* SOFT = 0 */
MCBSP_SPCR2_FRST_FSG, /* FRST = 0 */
MCBSP_SPCR2_GRST_CLKG, /* GRST = 0 */
MCBSP_SPCR2_XINTM_XRDY, /* XINTM = 0 */
0, /* XSYNCER = N/A */
MCBSP_SPCR2_XRST_DISABLE /* XRST = 0 */
),
/*单数据相，接受数据长度为16位,每相2个数据*/
MCBSP_RCR1_RMK(
MCBSP_RCR1_RFRLEN1_OF(1), /* RFRLEN1 = 1 */
MCBSP_RCR1_RWDLEN1_16BIT /* RWDLEN1 = 2 */
),
MCBSP_RCR2_RMK(
MCBSP_RCR2_RPHASE_SINGLE, /* RPHASE = 0 */
MCBSP_RCR2_RFRLEN2_OF(0), /* RFRLEN2 = 0 */
MCBSP_RCR2_RWDLEN2_8BIT, /* RWDLEN2 = 0 */
MCBSP_RCR2_RCOMPAND_MSB, /* RCOMPAND = 0 */
MCBSP_RCR2_RFIG_YES, /* RFIG = 0 */
MCBSP_RCR2_RDATDLY_1BIT /* RDATDLY = 1 */
),
MCBSP_XCR1_RMK(
MCBSP_XCR1_XFRLEN1_OF(1), /* XFRLEN1 = 1 */
MCBSP_XCR1_XWDLEN1_16BIT /* XWDLEN1 = 2 */
),
MCBSP_XCR2_RMK(
MCBSP_XCR2_XPHASE_SINGLE, /* XPHASE = 0 */
MCBSP_XCR2_XFRLEN2_OF(0), /* XFRLEN2 = 0 */
MCBSP_XCR2_XWDLEN2_8BIT, /* XWDLEN2 = 0 */
MCBSP_XCR2_XCOMPAND_MSB, /* XCOMPAND = 0 */
MCBSP_XCR2_XFIG_YES, /* XFIG = 0 */
MCBSP_XCR2_XDATDLY_1BIT /* XDATDLY = 1 */
),
MCBSP_SRGR1_DEFAULT,
MCBSP_SRGR2_DEFAULT,
MCBSP_MCR1_DEFAULT,
MCBSP_MCR2_DEFAULT,
MCBSP_PCR_RMK(
MCBSP_PCR_IDLEEN_RESET, /* IDLEEN = 0 */
MCBSP_PCR_XIOEN_SP, /* XIOEN = 0 */
MCBSP_PCR_RIOEN_SP, /* RIOEN = 0 */
MCBSP_PCR_FSXM_EXTERNAL, /* FSXM = 0 */
MCBSP_PCR_FSRM_EXTERNAL, /* FSRM = 0 */
0, /* DXSTAT = N/A */
MCBSP_PCR_CLKXM_INPUT, /* CLKXM = 0 */
MCBSP_PCR_CLKRM_INPUT, /* CLKRM = 0 */
MCBSP_PCR_SCLKME_NO, /* SCLKME = 0 */
MCBSP_PCR_FSXP_ACTIVEHIGH, /* FSXP = 0 */
MCBSP_PCR_FSRP_ACTIVEHIGH, /* FSRP = 1 */
MCBSP_PCR_CLKXP_FALLING, /* CLKXP = 1 */
MCBSP_PCR_CLKRP_RISING /* CLKRP = 1 */
),
MCBSP_RCERA_DEFAULT,
MCBSP_RCERB_DEFAULT,
MCBSP_RCERC_DEFAULT,
MCBSP_RCERD_DEFAULT,
MCBSP_RCERE_DEFAULT,
MCBSP_RCERF_DEFAULT,
MCBSP_RCERG_DEFAULT,
MCBSP_RCERH_DEFAULT,
MCBSP_XCERA_DEFAULT,
MCBSP_XCERB_DEFAULT,
MCBSP_XCERC_DEFAULT,
MCBSP_XCERD_DEFAULT,
MCBSP_XCERE_DEFAULT,
MCBSP_XCERF_DEFAULT,
MCBSP_XCERG_DEFAULT,
MCBSP_XCERH_DEFAULT
};
/* This next struct shows how to use the I2C API */
/* Create and initialize an I2C initialization structure */
I2C_Setup I2Cinit = {
0, /* 7 bit address mode */
0, /* own address - don't care if master */
84, /* clkout value (Mhz) */
50, /* a number between 10 and 400*/
0, /* number of bits/byte to be received or transmitted (8)*/
0, /* DLB mode on*/
1 /* FREE mode of operation on*/
};
I2C_Config testI2C;
#if CHIP_5509A
MMC_SetupNative Init = {
1, /* Disable DMA for data read/write */
0, /* Set level of edge detection for DAT3 pin */
0, /* Determines if MMC goes IDLE during IDLE instr */
1, /* Memory clk reflected on CLK Pin */
7, /* CPU CLK to MMC function clk divide down */
5, /* MMC function clk to memory clk divide down */
0, /* No. memory clks to wait before response timeout */
0, /* No. memory clks to wait before data timeout */
512, /* Block Length must be same as CSD */
};
#else
MMC_SetupNative Init = {
0, /* Disable DMA for data read/write */
0, /* Set level of edge detection for DAT3 pin */
0, /* Determines if MMC goes IDLE during IDLE instr */
1, /* Memory clk reflected on CLK Pin */
3, /* CPU CLK to MMC function clk divide down */
3, /* MMC function clk to memory clk divide down */
0, /* No. memory clks to wait before response timeout */
0, /* No. memory clks to wait before data timeout */
512, /* Block Length must be same as CSD */
};
#endif
/* Create DMA Receive Side Configuration */
DMA_Config dmaRcvConfig = {
DMA_DMACSDP_RMK(
DMA_DMACSDP_DSTBEN_NOBURST, //Destination burst :-不使用突发
DMA_DMACSDP_DSTPACK_OFF, //Destination packing :-目标口禁止打包
DMA_DMACSDP_DST_DARAM, //Destination selection :-接收的目标口是DARAM
//00 SARAM;01 DARAM;10 EMIF;11 PERIPH
DMA_DMACSDP_SRCBEN_NOBURST, //Source burst :-源突发禁止
DMA_DMACSDP_SRCPACK_OFF, //Source packing :-源口禁止打包
DMA_DMACSDP_SRC_PERIPH, //Source selection :-外设mcbsp www
// DMA_DMACSDP_SRC_DARAM, //Source selection :-外设mcbsp
DMA_DMACSDP_DATATYPE_16BIT //Data type :-设置数据类型16bit字长
), /* DMACSDP */
DMA_DMACCR_RMK(
DMA_DMACCR_DSTAMODE_POSTINC, //Destination address mode :-自动执行后增量（由于本程序中数据类型是16bit，所以+2）
DMA_DMACCR_SRCAMODE_CONST, //Source address mode :-源地址为恒定地址
DMA_DMACCR_ENDPROG_ON, //End of programmation bit :-
DMA_DMACCR_REPEAT_OFF, //Repeat condition :（AUTOINIT=1）才有效？-0 管编程配置结束位 1 不管编程配置结束位，结束传输自动初始化开始
//0:Repeat only if ENDPROG = 1（AUTOINIT=1）
DMA_DMACCR_AUTOINIT_OFF, //Auto initialization bit :-
DMA_DMACCR_EN_STOP, //Channel enable :-设置时先关闭通道
// DMA_DMACCR_PRIO_LOW, //Channel priority :-设置为低优先级
DMA_DMACCR_PRIO_HI,
DMA_DMACCR_FS_DISABLE, //(FS_ELEMENT 单元事件同步)
// DMA_DMACCR_SYNC_REVT1 //Synchronization control bits 同步控制位 www
DMA_DMACCR_SYNC_REVT2
), /* DMACCR */
DMA_DMACICR_RMK(
DMA_DMACICR_BLOCKIE_OFF, //Whole block interrupt enable :-块传输完成后中断不使能
DMA_DMACICR_LASTIE_OFF, //Last frame interrupt enable :-
DMA_DMACICR_FRAMEIE_ON, //Whole frame interrupt enable :-帧传输完成后中断使能
DMA_DMACICR_FIRSTHALFIE_OFF, //Half frame interrupt enable :-
DMA_DMACICR_DROPIE_OFF, //Sync. event drop interrupt enable :-
DMA_DMACICR_TIMEOUTIE_OFF //Time out interrupt enable :-
), /* DMACICR */
(DMA_AdrPtr)(MMC_ADDR(MMCDRR1)), /* DMACSSAL 源地址低位*/
// (DMA_AdrPtr)&xmt,
0, /* DMACSSAU 源地址高位*/
(DMA_AdrPtr)&rcv, /* DMACDSAL 目的地址低位*/
0, /* DMACDSAU 目的地址高位*/
N, /* DMACEN 1帧内数据长度 N个数据一个帧*/
1, /* DMACFN 帧数大小*/
0, /* DMACFI */
0 /* DMACEI */
};
/* Create DMA Xmt Side Configuration */
DMA_Config dmaXmtConfig = {
DMA_DMACSDP_RMK(
DMA_DMACSDP_DSTBEN_NOBURST, //Destination burst :-不使用突发
DMA_DMACSDP_DSTPACK_OFF, //Destination packing :-目标口禁止打包
// DMA_DMACSDP_DST_DARAM, //Destination selection :-接收的目标口是DARAM
DMA_DMACSDP_DST_PERIPH,
//00 SARAM;01 DARAM;10 EMIF;11 PERIPH
DMA_DMACSDP_SRCBEN_NOBURST, //Source burst :-源突发禁止
DMA_DMACSDP_SRCPACK_OFF, //Source packing :-源口禁止打包
// DMA_DMACSDP_SRC_PERIPH, //Source selection :-外设mcbsp www
DMA_DMACSDP_SRC_DARAM, //Source selection :-外设mcbsp
DMA_DMACSDP_DATATYPE_16BIT //Data type :-设置数据类型16bit字长
), /* DMACSDP */
DMA_DMACCR_RMK(
DMA_DMACCR_DSTAMODE_CONST, //Destination address mode :-自动执行后增量（由于本程序中数据类型是16bit，所以+2）
DMA_DMACCR_SRCAMODE_POSTINC, //Source address mode :-源地址为恒定地址
DMA_DMACCR_ENDPROG_ON, //End of programmation bit :-
DMA_DMACCR_REPEAT_OFF, //Repeat condition :（AUTOINIT=1）才有效？-0 管编程配置结束位 1 不管编程配置结束位，结束传输自动初始化开始
//0:Repeat only if ENDPROG = 1（AUTOINIT=1）
DMA_DMACCR_AUTOINIT_OFF, //Auto initialization bit :-
DMA_DMACCR_EN_STOP, //Channel enable :-设置时先关闭通道
DMA_DMACCR_PRIO_LOW, //Channel priority :-设置为低优先级
DMA_DMACCR_FS_DISABLE, //(FS_ELEMENT 单元事件同步)
// DMA_DMACCR_SYNC_REVT1 //Synchronization control bits 同步控制位 www
DMA_DMACCR_SYNC_XEVT1
), /* DMACCR */
DMA_DMACICR_RMK(
// DMA_DMACICR_BLOCKIE_OFF, //Whole block interrupt enable :-块传输完成后中断不使能
DMA_DMACICR_BLOCKIE_ON,
DMA_DMACICR_LASTIE_OFF, //Last frame interrupt enable :-
// DMA_DMACICR_FRAMEIE_ON, //Whole frame interrupt enable :-帧传输完成后中断使能
DMA_DMACICR_FRAMEIE_OFF,
DMA_DMACICR_FIRSTHALFIE_OFF, //Half frame interrupt enable :-
DMA_DMACICR_DROPIE_OFF, //Sync. event drop interrupt enable :-
DMA_DMACICR_TIMEOUTIE_OFF //Time out interrupt enable :-
), /* DMACICR */
(DMA_AdrPtr)&xmt, /* DMACSSAL 源地址低位*/
// (DMA_AdrPtr)&xmt,
0, /* DMACSSAU 源地址高位*/
(DMA_AdrPtr)(MCBSP_ADDR(DRR10)), /* DMACDSAL 目的地址低位*/
0, /* DMACDSAU 目的地址高位*/
// N, /* DMACEN 1帧内数据长度 N个数据一个帧*/
// 1, /* DMACFN 帧数大小*/
2, /* DMACEN 1帧内数据长度 N个数据一个帧*/
N/2, /* DMACFN 帧数大小*/
0, /* DMACFI */
0 /* DMACEI */
};
/* Define a DMA_Handle object to be used with DMA_open function */
DMA_Handle hDmaRcv,hDmaXmt;
volatile Uint16 transferComplete = FALSE;
Uint16 err = 0;
Uint16 old_intm;
Uint16 rcvEventId,xmtEventId;
/* Read and write buffers */
Uint16 datasend[512];
Uint16 datareceive[512];
/*数字音频接口格式设置
AIC23为主模式，数据为DSP模式，数据长度16位*/
Uint16 digital_audio_inteface_format[2]={0x0e,0x53};
/*AIC23的波特率设置，采样率为44.1K*/
Uint16 sample_rate_control[2] = {0x10,0x23};
/*AIC23寄存器复位*/
Uint16 reset[2] ={0x1e,0x00};
/*AIC23节电方式设置，所有部分均所与工作状态*/
Uint16 power_down_control[2] ={0x0c,0x03};
/*AIC23模拟音频的控制
DAC使能，ADC输入选择为Line*/
Uint16 analog_aduio_path_control[2] ={0x08,0x10};
/*AIC23数字音频通路的控制*/
Uint16 digital_audio_path_control[2] ={0x0a,0x05};
/*AIC23数字接口的使能*/
Uint16 digital_interface_activation[2] ={0x12,0x01};
/*AIC23左通路音频调节*/
Uint16 left_line_input_volume_control[2] ={0x00,0x17};
/*AIC23右通路音频调节*/
Uint16 right_line_input_volume_control[2] ={0x02,0x17};
/*AIC23耳机左通路音频调节*/
Uint16 left_headphone_volume_control[2] ={0x05,0xFF};
/*AIC23耳机右通路音频调节*/
Uint16 right_headphone_volume_control[2] = {0x07,0xFF};
/*定义McBSP的句柄*/
MCBSP_Handle hMcbsp;
Uint16 i2c_status;
Uint16 i,temp;
extern void VECSTART(void);
interrupt void dmaRcvIsr(void);
interrupt void dmaXmtIsr(void);
void taskFxn(void);
void delay(Uint32 k)
{
while(k--);
}
void main(void)
{
Uint16 aic23data = 0;
i2c_status = 1;
/* Initialize CSL library - This is REQUIRED !!! */
/*初始化CSL库*/
CSL_init();
/* Set IVPD/IVPH to start of interrupt vector table */
IRQ_setVecs((Uint32)(&VECSTART));
for (i = 0; i <= N - 1; i++) {
xmt[i] = i + 1;
rcv[i] = 0;
}
printf ("\nMMC Single block read-write test\n");
for (count=0;count<=256;count++){
datasend[count] = count;
datareceive[count] = 0xFFFF;
}
/*设置系统的运行速度为140MHz*/
PLL_config(&myConfig);
/* Initialize I2C, using parameters in init structure */
/*初始化I2C的格式*/
// I2C_config(&Config);
// I2C_start();
// I2C_getConfig(&Config1);
/*I2C is undet reset*/
I2C_RSET(I2CMDR,0);
/*设置预分频寄存器,I2C的mode clock is 10MHz*/
delay(100);
I2C_RSET(I2CSAR,0x001A);
I2C_RSET(I2CMDR,0x0620);
I2C_setup(&I2Cinit);
/*设置Ｉ２Ｃ的Mater clock*/
I2C_RSET(I2CCLKL,100);
I2C_RSET(I2CCLKH,100);
I2C_getConfig(&testI2C);
/*初始化McBSP0*/
hMcbsp = MCBSP_open(MCBSP_PORT0,MCBSP_OPEN_RESET);
/*设置McBSP0*/
MCBSP_config(hMcbsp,&Mcbsp1Config);
/*启动McBSP0*/
MCBSP_start(hMcbsp,
MCBSP_RCV_START | MCBSP_XMIT_START,
0);
MCBSP_getConfig(hMcbsp,&Mcbsptest);
/* A detailed explanation of MMC initialization is provided in mmc_setup example */
mmc0 = MMC_open(MMC_DEV1);
MMC_setupNative(mmc0,&Init);
// MMC_sendGoIdle(mmc0);
MMC_sendCmd(mmc0, SD_GO_IDLE_STATE ,0, 0,1);
for (count=0;count<4016;count++)
asm(" NOP");
cardtype = MMC_sendOpCond(mmc0,0x00100000);
// MMC_setCallBack(mmc0, &callback);
// MMC_intEnable(mmc0, 0x400);
if (cardtype == MMC_CARD){
cid = &cardid;
MMC_sendAllCID(mmc0,cid); // get the CID structure for all cards.
rca = 10;
card = &cardalloc;
retVal = MMC_setRca(mmc0,card,rca);
} else {
cid = &cardid;
SD_sendAllCID(mmc0,cid); // get the CID structure for all cards.
card = &cardalloc;
rca = SD_sendRca(mmc0,card);
printf ("RCA sent by the SD card is 0x%x\n", rca);
}
/* Select the card to transfer data to/from. This step puts the card into the *
* transfer state where it is ready to read/write data */
retVal = MMC_selectCard(mmc0,card);
/*reset AIC23*/
i2c_status = I2C_write( reset, //pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
delay(1000);
/*设置AIC23各部分均工作*/
i2c_status = I2C_write( power_down_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置AIC23的数字接口*/
i2c_status = I2C_write( digital_audio_inteface_format,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置AIC23模拟通路*/
/* i2c_status = I2C_write( analog_aduio_path_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);*/
/*设置数字通路*/
i2c_status = I2C_write( digital_audio_path_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置AIC23的采样率*/
i2c_status = I2C_write( sample_rate_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置耳机音量*/
i2c_status = I2C_write( left_headphone_volume_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
i2c_status = I2C_write( right_headphone_volume_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*设置Line输入的音量*/
i2c_status = I2C_write( left_line_input_volume_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
i2c_status = I2C_write( right_line_input_volume_control,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
/*启动AIC23*/
i2c_status = I2C_write( digital_interface_activation,//pointer to data array
2, //length of data to be transmitted
1, //master or slaver
CODEC_ADDR, //slave address to transmit to
1, //transfer mode of operation
30000 //time out for bus busy
);
printf ("Reading data from card...\n");
taskFxn();
// retVal = MMC_read(mmc0,0x219a00,datareceive,512);
// MMC_RSET(MMCBLEN1,512);
MMC_sendCmd(mmc0, SD_SET_BLOCKLEN ,0, 512,1);
MMC_sendCmd(mmc0, SD_READ_SINGLE_BLOCK ,0, 0,1);
/* Verify that data read corresponds to data transferred */
/* Wait for DMA transfer to be complete */
while (!transferComplete){
;
}
/*------------------------------------------*\
* Compare values
\*------------------------------------------*/
for(i = 0; i <= N - 1; i++){
if (rcv[i] != xmt[i]){
++err;
break;
}
}
printf ("%s\n",err?"TEST FAILED" : "TEST PASSED");
/* Restore status of global interrupt enable flag */
IRQ_globalRestore(old_intm);
/* We're done with MCBSP and DMA , so close them */
DMA_close(hDmaRcv);
DMA_close(hDmaXmt);
}
void taskFxn(void)
{
Uint16 srcAddrHi, srcAddrLo;
Uint16 dstAddrHi, dstAddrLo;
Uint16 i;
/* By default, the TMS320C55xx compiler assigns all data symbols word */
/* addresses. The DMA however, expects all addresses to be byte */
/* addresses. Therefore, we must shift the address by 2 in order to */
/* change the word address to a byte address for the DMA transfer. */
// srcAddrHi = (Uint16)(((Uint32)(&xmt)) >> 15) & 0xFFFFu;
// srcAddrLo = (Uint16)(((Uint32)(&xmt)) << 1) & 0xFFFFu;
srcAddrHi = (Uint16)(((Uint32)(MMC_ADDR(MMCDRR1))) >> 15) & 0xFFFFu;
srcAddrLo = (Uint16)(((Uint32)(MMC_ADDR(MMCDRR1))) << 1) & 0xFFFFu;
dstAddrHi = (Uint16)(((Uint32)(&rcv)) >> 15) & 0xFFFFu;
dstAddrLo = (Uint16)(((Uint32)(&rcv)) << 1) & 0xFFFFu;
dmaRcvConfig.dmacssal = (DMA_AdrPtr)srcAddrLo;
dmaRcvConfig.dmacssau = srcAddrHi;
dmaRcvConfig.dmacdsal = (DMA_AdrPtr)dstAddrLo;
dmaRcvConfig.dmacdsau = dstAddrHi;
srcAddrHi = (Uint16)(((Uint32)(&xmt[0])) >> 15) & 0xFFFFu;
srcAddrLo = (Uint16)(((Uint32)(&xmt[0])) << 1) & 0xFFFFu;
dstAddrHi = (Uint16)(((Uint32)(MCBSP_ADDR(DXR10))) >> 15) & 0xFFFFu;
dstAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DXR10))) << 1) & 0xFFFFu;
dmaXmtConfig.dmacssal = (DMA_AdrPtr)srcAddrLo;
dmaXmtConfig.dmacssau = srcAddrHi;
dmaXmtConfig.dmacdsal = (DMA_AdrPtr)dstAddrLo;
dmaXmtConfig.dmacdsau = dstAddrHi;
/* Open MCBSP Port 1 and set registers to their power on defaults */
// hMcbsp = MCBSP_open(MCBSP_PORT1, MCBSP_OPEN_RESET);
/* Open DMA channels 4 & 5 and set regs to power on defaults */
hDmaRcv = DMA_open(DMA_CHA4,DMA_OPEN_RESET);
hDmaXmt = DMA_open(DMA_CHA5,DMA_OPEN_RESET);
/* Get interrupt event associated with DMA receive and transmit */
rcvEventId = DMA_getEventId(hDmaRcv);
xmtEventId = DMA_getEventId(hDmaXmt);
/* Temporarily disable interrupts and clear any pending */
/* interrupts for MCBSP transmit */
old_intm = IRQ_globalDisable();
/* Clear any pending interrupts for DMA channels */
IRQ_clear(rcvEventId);
IRQ_clear(xmtEventId);
/* Enable DMA interrupt in IER register */
IRQ_enable(rcvEventId);
IRQ_enable(xmtEventId);
/* Set Start Of Interrupt Vector Table */
IRQ_setVecs(0x10000);
/* Place DMA interrupt service addresses at associate vector */
IRQ_plug(rcvEventId,&dmaRcvIsr);
IRQ_plug(xmtEventId,&dmaXmtIsr);
/* Write values from configuration structure to DMA control regs */
DMA_config(hDmaRcv,&dmaRcvConfig);
DMA_config(hDmaRcv,&dmaXmtConfig);
/* Enable all maskable interrupts */
IRQ_globalEnable();
/* Enable DMA */
DMA_start(hDmaRcv);
// DMA_start(hDmaXmt);
#endif
}
interrupt void dmaXmtIsr(void) {
DMA_stop(hDmaXmt);
IRQ_disable(xmtEventId);
transferComplete = TRUE;
}
interrupt void dmaRcvIsr(void) {
DMA_stop(hDmaRcv);
IRQ_disable(rcvEventId);
for (i = 0; i <= N - 1; i++) {
xmt[i] = rcv[i];
}
DMA_start(hDmaXmt);
}
/******************************************************************************\
* End of i2c2.c
\******************************************************************************/
