TI中文支持网请问下有相关资料和例程吗？CSL库里面读取SD卡数据都没使能DMA
Shine：
可以参考C:\ti\C55xxCSL\examples\generic5509\csl\dma\dma4，这个例程是McBSP+DMA的。
需要做修改的地方：1. DMA event改成MMC receive event， MMC transmit eventTable 3−4. Synchronization Control Functionhttp://www.ti.com/lit/ds/symlink/tms320vc5509a.pdf2. MMCCTL.DMAEN位使能
user4731232：
回复 Shine:
非常感谢您的回复，我想问下Serial Port 1 Mode这个是在哪个寄存器里面？我找了两天了都找不到
还有我想问下，retVal = MMC_read(mmc0,0x219a00,datareceive,512);这句话我想读取SD卡这段数据，对于DMA原地址的定义应该如何编写?
Shine：
这个在EBSR寄存器里设置。3.5.1 External Bus Selection Register (EBSR)http://www.ti.com/lit/ds/symlink/tms320vc5509a.pdf
user4731232：
回复 Shine:
非常感谢您的回答，我想问下，CSL例程读取SD卡程序时应该已经设置了吧？如果没有设置的话他如何读取SD卡的数据呢？
请问下如果没有设置的话我要调用哪个函数来对EBSR进行设置？
Shine：
回复 user4731232:
如果你之前的SD卡程序已经可以读写了，那应该已经是设好了的，你也可以看一下EBSR的值确认。
可以用CHIP_FSET函数设置，也可以直接写代码，如下：#define EBSR (*(volatile ioport unsigned short*)0x6c00)….EBSR =;
user4731232：
回复 Shine:
好的，那应该是已经设置好了的，我SD读写的程序是直接拿CSL的例程的
还有我想问下，retVal = MMC_read(mmc0,0x219a00,datareceive,512);这句话，我如何将其应用到DMA的使用中？我想做的是将SD的一段数据取出来放到DARAM中
下面是我的程序
/** Copyright (C) 2003 Texas Instruments Incorporated* All Rights Reserved*/ /**---------main_dma4.c---------* This example places the MCBSP in digital loopback mode and* syncs MCBSP receive with DMA channel 4 and MCBSP transmit* with DMA channel 5.* The example uses predefined CSL macros and symbolic* constants to create the initialization values needed for* the MCBSP and DMA control registers to effect the transfer*/ #include <stdio.h>#include <csl_mmc.h> #include <csl_mcbsp.h> #include <csl_dma.h> #include <csl_irq.h>#define EBSR(*(volatile ioport unsigned short*)0x6c00)#pragma DATA_SECTION(mmc0,"cslmem") MMC_Handle mmc0; MMC_CardObj *card, cardalloc; MMC_CardIdObj *cid, cardid;int count, retVal; Uint16 rca; Uint16 cardtype;/* Because of different operating clock frequencies, the Init structure for c5509** and c5509a have different values for memory and function clock divide down values */ #if CHIP_5509AMMC_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*/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*/}; #elseMMC_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/* Read and write buffers */ Uint16 datasend[512]; Uint16 datareceive[512];//---------Global constants--------- #define N128//---------Global data definition---------/* Define transmit and receive buffers */ #pragma DATA_SECTION(xmt,"dmaMem") Uint16 xmt[N]; #pragma DATA_SECTION(rcv,"dmaMem") Uint16 rcv[N];MCBSP_Config ConfigLoopBack16= {MCBSP_SPCR1_RMK(MCBSP_SPCR1_DLB_ON,/* DLB= 1 数字回环模式使能*/MCBSP_SPCR1_RJUST_RZF,/* RJUST= 0 接收数据符号扩展和调节方式(左对齐数据和右对齐数据等等)*/MCBSP_SPCR1_CLKSTP_DISABLE,/* CLKSTP = 0 Clock stop mode disable */MCBSP_SPCR1_DXENA_NA,/* DXENA= 0 DX引脚延时使能*/MCBSP_SPCR1_ABIS_DISABLE,/* ABIS= 0 reserved always write 0*/MCBSP_SPCR1_RINTM_RRDY,/* RINTM= 0 接收中断模式（可能需要设置？）*/0,/* RSYNCER = 0 接收帧同步错误标志*/MCBSP_SPCR1_RRST_DISABLE/* RRST= 0 禁止接收器复位*/),MCBSP_SPCR2_RMK(MCBSP_SPCR2_FREE_NO,/* FREE= 0 free run bit, The McBSP transmit and receive clocks are affected as determined by the SOFT bit*/MCBSP_SPCR2_SOFT_NO,/* SOFT= 0 Soft stop bit, Hard stop*/MCBSP_SPCR2_FRST_FSG,/* FRST= 0 帧同步逻辑复位*/MCBSP_SPCR2_GRST_CLKG,/* GRST= 0 采样率发生器复位*/MCBSP_SPCR2_XINTM_XRDY,/* XINTM= 0 发送中断模式（可能需要设置？）*/0,/* XSYNCER = N/A transmit frame-sync error bit, no error*/MCBSP_SPCR2_XRST_DISABLE/* XRST= 0 发送器复位*///注意：开始一定要设置为disable，否则不能设置它的寄存器，全部为默认值，导致不能正常接收，//在程序调用C库函数mcbspstart时会在设为1，McBSP便退出reset状态开始工作),MCBSP_RCR1_RMK(MCBSP_RCR1_RFRLEN1_OF(0),/* RFRLEN1 = 0 接收阶段1的帧长（1-128）个字*/MCBSP_RCR1_RWDLEN1_16BIT/* RWDLEN1 = 5 接收阶段1的字长*/),MCBSP_RCR2_RMK(MCBSP_RCR2_RPHASE_SINGLE,/* RPHASE= 0 接收帧的阶段数*/MCBSP_RCR2_RFRLEN2_OF(0),/* RFRLEN2 = 0 接收阶段2关闭*/MCBSP_RCR2_RWDLEN2_8BIT,/* RWDLEN2 = 0 接收阶段2的字长为8位*/MCBSP_RCR2_RCOMPAND_MSB,/* RCOMPAND = 0 接收数据压扩模式*/MCBSP_RCR2_RFIG_YES,/* RFIG= 0 忽略不期望接收的帧同步信号*/MCBSP_RCR2_RDATDLY_0BIT/* RDATDLY = 0 接收数据不延时*/),MCBSP_XCR1_RMK(MCBSP_XCR1_XFRLEN1_OF(0),/* XFRLEN1 = 0 发送阶段1的帧长（1-128）个字*/MCBSP_XCR1_XWDLEN1_16BIT/* XWDLEN1 = 5 发送阶段1的字长*/),MCBSP_XCR2_RMK(MCBSP_XCR2_XPHASE_SINGLE,/* XPHASE= 0 Transmit phase number bit, single-phase frame*/MCBSP_XCR2_XFRLEN2_OF(0),/* XFRLEN2 = 0 */MCBSP_XCR2_XWDLEN2_8BIT,/* XWDLEN2 = 0 */MCBSP_XCR2_XCOMPAND_MSB,/* XCOMPAND = 0 Transmit companding mode bits, 0, no companding,MSB received first*/MCBSP_XCR2_XFIG_YES,/* XFIG= 0 Transmit frame-sync ignore bit, 1, frame-sync detect*/MCBSP_XCR2_XDATDLY_0BIT/* XDATDLY = 0 Transmit data delay bits*/),MCBSP_SRGR1_RMK(MCBSP_SRGR1_FWID_OF(1),/* FWID= 1 帧同步信号FSG的脉冲宽度*/MCBSP_SRGR1_CLKGDV_OF(1)/* CLKGDV= 1 输出时钟信号CLKG的分频值*/),MCBSP_SRGR2_RMK(MCBSP_SRGR2_GSYNC_FREE,/* FREE= 0 */MCBSP_SRGR2_CLKSP_RISING,/* CLKSP= 0 */MCBSP_SRGR2_CLKSM_INTERNAL,/* CLKSM= 1 */MCBSP_SRGR2_FSGM_DXR2XSR,/* FSGM= 0 */MCBSP_SRGR2_FPER_OF(15)/* FPER= 0 */),MCBSP_MCR1_DEFAULT,//MCR是通道控制器MCBSP_MCR2_DEFAULT,MCBSP_PCR_RMK(MCBSP_PCR_IDLEEN_RESET,/* IDLEEN= 0The McBSP remains active when the PERIPH domain is idled */MCBSP_PCR_XIOEN_SP,/* XIOEN= 0Transmit I/O enable bit, CLKX,FSX,DX,CLKS pins are serial port pins*/MCBSP_PCR_RIOEN_SP,/* RIOEN= 0Receive I/O enable bit, CLKR,FSR,DR,CLKS pins are serial port pins*/MCBSP_PCR_FSXM_INTERNAL,/* FSXM= 1发送帧同步模式：1为由MCBSP提供*/MCBSP_PCR_FSRM_EXTERNAL,/* FSRM= 0接收帧同步模式：0为FSR引脚提供*/MCBSP_PCR_CLKXM_OUTPUT,/* CLKXM= 1Transmit clock mode bit*/MCBSP_PCR_CLKRM_INPUT,/* CLKRM= 0Receive clock mode bit*/MCBSP_PCR_SCLKME_NO,/* SCLKME= 0Sample rate generator input clock mode bit,used with CLKSM to select the input clock*/0,/* DXSTAT = N/A*/MCBSP_PCR_FSXP_ACTIVEHIGH,/* FSXP= 0Transmit frame-sync polarity bit, 0,transmit frame-sync pulses are active high*/MCBSP_PCR_FSRP_ACTIVEHIGH,/* FSRP= 0Receive frame-sync polarity bit, 0,receive frame-sync pulses are active high*/MCBSP_PCR_CLKXP_RISING,/* CLKXP= 0Transmit clock polarity bit,1,transmit data is driven on the rising edge of CLKX*/MCBSP_PCR_CLKRP_FALLING/* CLKRP= 0Receive clock polarity bit*/),MCBSP_RCERA_DEFAULT,//通道使能寄存器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 };/* Create DMA Receive Side Configuration */ DMA_ConfigdmaRcvConfig = {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 PERIPHDMA_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mcbspDMA_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_FS_DISABLE,//(FS_ELEMENT 单元事件同步)DMA_DMACCR_SYNC_REVT1//Synchronization control bits),/* 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)(MCBSP_ADDR(DRR11)),/* DMACSSAL 源地址低位*/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,/* DMACEN1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 Transmit Side Configuration */ DMA_ConfigdmaXmtConfig = {DMA_DMACSDP_RMK(DMA_DMACSDP_DSTBEN_NOBURST,DMA_DMACSDP_DSTPACK_OFF,DMA_DMACSDP_DST_PERIPH,//Destination selection :-外设mcbspDMA_DMACSDP_SRCBEN_NOBURST,DMA_DMACSDP_SRCPACK_OFF,DMA_DMACSDP_SRC_DARAM,//Source selection :DARAMDMA_DMACSDP_DATATYPE_16BIT),/* DMACSDP*/DMA_DMACCR_RMK(DMA_DMACCR_DSTAMODE_CONST,//Destination address mode :-恒定地址DMA_DMACCR_SRCAMODE_POSTINC,//Source address mode :-自动执行后增量（由于本程序中数据类型是16bit，所以+2DMA_DMACCR_ENDPROG_ON,DMA_DMACCR_REPEAT_OFF,DMA_DMACCR_AUTOINIT_OFF,DMA_DMACCR_EN_STOP,DMA_DMACCR_PRIO_LOW,DMA_DMACCR_FS_DISABLE,DMA_DMACCR_SYNC_XEVT1//Synchronization control bits),/* 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)&xmt[1],/* DMACSSAL */0,/* DMACSSAU */(DMA_AdrPtr)(MCBSP_ADDR(DXR11)),/* DMACDSAL */0,/* DMACDSAU */N,/* DMACEN*/1,/* DMACFN*/0,/* DMACFI*/0/* DMACEI*/ };/* Define a DMA_Handle object to be used with DMA_open function */ DMA_Handle hDmaRcv, hDmaXmt;/* Define a MCBSP_Handle object to be used with MCBSP_open function */ MCBSP_Handle hMcbsp;volatile Uint16 transferComplete = FALSE; Uint16 err = 0; Uint16 old_intm; Uint16 xmtEventId, rcvEventId;//---------Function prototypes--------- /* Reference start of interrupt vector table*/ /* This symbol is defined in file, vectors.s55 */ extern void VECSTART(void);/* Protoype for interrupt functions */ interrupt void dmaXmtIsr(void); interrupt void dmaRcvIsr(void); void taskFxn(void);//---------main routine--------- void main(void) {Uint16 i;/* Initialize CSL library - This is REQUIRED !!! */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;}/* A detailed explanation of MMC initialization is provided in mmc_setup example */mmc0 = MMC_open(MMC_DEV1);MMC_setupNative(mmc0,&Init);MMC_sendGoIdle(mmc0);for (count=0;count<4016;count++)asm(" NOP");cardtype = MMC_sendOpCond(mmc0,0x00100000);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);printf ("Reading data from card...\n");retVal = MMC_read(mmc0,0x219a00,datareceive,512);for (count = 0; count < 6000; ++count);printf ("TEST PASSED\n");/* Call function to effect transfer */taskFxn(); }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)(MCBSP_ADDR(DRR11))) >> 15) & 0xFFFFu;srcAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DRR11))) << 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(DXR11))) >> 15) & 0xFFFFu;dstAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DXR11))) << 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 */xmtEventId = DMA_getEventId(hDmaXmt);rcvEventId = DMA_getEventId(hDmaRcv);/* Temporarily disable interrupts and clear any pending *//* interrupts for MCBSP transmit */old_intm = IRQ_globalDisable();/* Clear any pending interrupts for DMA channels */IRQ_clear(xmtEventId);IRQ_clear(rcvEventId);/* Enable DMA interrupt in IER register */IRQ_enable(xmtEventId);IRQ_enable(rcvEventId);/* Set Start Of Interrupt Vector Table */IRQ_setVecs(0x10000);/* Place DMA interrupt service addresses at associate vector */IRQ_plug(xmtEventId,&dmaXmtIsr);IRQ_plug(rcvEventId,&dmaRcvIsr);/* Write values from configuration structure to MCBSP control regs */MCBSP_config(hMcbsp, &ConfigLoopBack16);/* Write values from configuration structure to DMA control regs */DMA_config(hDmaRcv,&dmaRcvConfig);DMA_config(hDmaXmt,&dmaXmtConfig);#if 0/* Take MCBSP transmit and receive out of reset */MCBSP_start(hMcbsp,MCBSP_XMIT_START | MCBSP_RCV_START,0u);/* Prime MCBSP DXR */while (!(MCBSP_xrdy(hMcbsp))){;}MCBSP_write16(hMcbsp,xmt[0]);/* Enable all maskable interrupts */IRQ_globalEnable();/* Enable DMA */DMA_start(hDmaRcv);DMA_start(hDmaXmt);/* Start Sample Rate Generator and Enable Frame Sync */MCBSP_start(hMcbsp,MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC,0x300u); #else/* Enable all maskable interrupts */IRQ_globalEnable();/* Start Sample Rate Generator and Enable Frame Sync */MCBSP_start(hMcbsp,MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC,0x300u);/* Enable DMA */DMA_start(hDmaRcv);DMA_start(hDmaXmt);/* Take MCBSP transmit and receive out of reset */MCBSP_start(hMcbsp,MCBSP_XMIT_START | MCBSP_RCV_START,0u); #endif/* 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 */MCBSP_close(hMcbsp);DMA_close(hDmaRcv);DMA_close(hDmaXmt); }interrupt void dmaXmtIsr(void) {DMA_stop(hDmaXmt);IRQ_disable(xmtEventId); }interrupt void dmaRcvIsr(void) {DMA_stop(hDmaRcv);IRQ_disable(rcvEventId);transferComplete = TRUE; }/* * Copyright (C) 2003 Texas Instruments Incorporated * All Rights Reserved *//* *———main_dma4.c——— * This example places the MCBSP in digital loopback mode and * syncs MCBSP receive with DMA channel 4 and MCBSP transmit * with DMA channel 5. * The example uses predefined CSL macros and symbolic * constants to create the initialization values needed for * the MCBSP and DMA control registers to effect the transfer */#include <stdio.h>
#include <csl_mmc.h>#include <csl_mcbsp.h>#include <csl_dma.h>#include <csl_irq.h>
#define EBSR (*(volatile ioport unsigned short*)0x6c00)
#pragma DATA_SECTION(mmc0,"cslmem")MMC_Handle mmc0;MMC_CardObj *card, cardalloc;MMC_CardIdObj *cid, cardid;
int count, retVal;Uint16 rca;Uint16 cardtype;
/* Because of different operating clock frequencies, the Init structure for c5509 * * and c5509a have different values for memory and function clock divide down values */#if CHIP_5509A 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 */ 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
/* Read and write buffers */Uint16 datasend[512];Uint16 datareceive[512];
//———Global constants———#define N 128
//———Global data definition———
/* Define transmit and receive buffers */#pragma DATA_SECTION(xmt,"dmaMem")Uint16 xmt[N];#pragma DATA_SECTION(rcv,"dmaMem")Uint16 rcv[N];
MCBSP_Config ConfigLoopBack16= { MCBSP_SPCR1_RMK( MCBSP_SPCR1_DLB_ON, /* DLB = 1 数字回环模式使能*/ MCBSP_SPCR1_RJUST_RZF, /* RJUST = 0 接收数据符号扩展和调节方式(左对齐数据和右对齐数据等等)*/ MCBSP_SPCR1_CLKSTP_DISABLE, /* CLKSTP = 0 Clock stop mode disable */ MCBSP_SPCR1_DXENA_NA, /* DXENA = 0 DX引脚延时使能*/ MCBSP_SPCR1_ABIS_DISABLE, /* ABIS = 0 reserved always write 0*/ MCBSP_SPCR1_RINTM_RRDY, /* RINTM = 0 接收中断模式（可能需要设置？）*/ 0, /* RSYNCER = 0 接收帧同步错误标志*/ MCBSP_SPCR1_RRST_DISABLE /* RRST = 0 禁止接收器复位*/ ), MCBSP_SPCR2_RMK( MCBSP_SPCR2_FREE_NO, /* FREE = 0 free run bit, The McBSP transmit and receive clocks are affected as determined by the SOFT bit*/ MCBSP_SPCR2_SOFT_NO, /* SOFT = 0 Soft stop bit, Hard stop*/ MCBSP_SPCR2_FRST_FSG, /* FRST = 0 帧同步逻辑复位*/ MCBSP_SPCR2_GRST_CLKG, /* GRST = 0 采样率发生器复位*/ MCBSP_SPCR2_XINTM_XRDY, /* XINTM = 0 发送中断模式（可能需要设置？）*/ 0, /* XSYNCER = N/A transmit frame-sync error bit, no error*/ MCBSP_SPCR2_XRST_DISABLE /* XRST = 0 发送器复位*/ //注意：开始一定要设置为disable，否则不能设置它的寄存器，全部为默认值，导致不能正常接收，
//在程序调用C库函数mcbspstart时会在设为1，McBSP便退出reset状态开始工作
), MCBSP_RCR1_RMK( MCBSP_RCR1_RFRLEN1_OF(0), /* RFRLEN1 = 0 接收阶段1的帧长（1-128）个字*/ MCBSP_RCR1_RWDLEN1_16BIT /* RWDLEN1 = 5 接收阶段1的字长*/ ), MCBSP_RCR2_RMK( MCBSP_RCR2_RPHASE_SINGLE, /* RPHASE = 0 接收帧的阶段数*/ MCBSP_RCR2_RFRLEN2_OF(0), /* RFRLEN2 = 0 接收阶段2关闭*/ MCBSP_RCR2_RWDLEN2_8BIT, /* RWDLEN2 = 0 接收阶段2的字长为8位*/ MCBSP_RCR2_RCOMPAND_MSB, /* RCOMPAND = 0 接收数据压扩模式*/ MCBSP_RCR2_RFIG_YES, /* RFIG = 0 忽略不期望接收的帧同步信号*/ MCBSP_RCR2_RDATDLY_0BIT /* RDATDLY = 0 接收数据不延时*/ ), MCBSP_XCR1_RMK( MCBSP_XCR1_XFRLEN1_OF(0), /* XFRLEN1 = 0 发送阶段1的帧长（1-128）个字*/ MCBSP_XCR1_XWDLEN1_16BIT /* XWDLEN1 = 5 发送阶段1的字长*/
), MCBSP_XCR2_RMK( MCBSP_XCR2_XPHASE_SINGLE, /* XPHASE = 0 Transmit phase number bit, single-phase frame*/ MCBSP_XCR2_XFRLEN2_OF(0), /* XFRLEN2 = 0 */ MCBSP_XCR2_XWDLEN2_8BIT, /* XWDLEN2 = 0 */ MCBSP_XCR2_XCOMPAND_MSB, /* XCOMPAND = 0 Transmit companding mode bits, 0, no companding,MSB received first*/ MCBSP_XCR2_XFIG_YES, /* XFIG = 0 Transmit frame-sync ignore bit, 1, frame-sync detect*/ MCBSP_XCR2_XDATDLY_0BIT /* XDATDLY = 0 Transmit data delay bits*/ ), MCBSP_SRGR1_RMK( MCBSP_SRGR1_FWID_OF(1), /* FWID = 1 帧同步信号FSG的脉冲宽度*/ MCBSP_SRGR1_CLKGDV_OF(1) /* CLKGDV = 1 输出时钟信号CLKG的分频值*/ ), MCBSP_SRGR2_RMK( MCBSP_SRGR2_GSYNC_FREE, /* FREE = 0 */ MCBSP_SRGR2_CLKSP_RISING, /* CLKSP = 0 */ MCBSP_SRGR2_CLKSM_INTERNAL, /* CLKSM = 1 */ MCBSP_SRGR2_FSGM_DXR2XSR, /* FSGM = 0 */ MCBSP_SRGR2_FPER_OF(15) /* FPER = 0 */ ), MCBSP_MCR1_DEFAULT, //MCR是通道控制器 MCBSP_MCR2_DEFAULT, MCBSP_PCR_RMK( MCBSP_PCR_IDLEEN_RESET, /* IDLEEN = 0 The McBSP remains active when the PERIPH domain is idled */ MCBSP_PCR_XIOEN_SP, /* XIOEN = 0 Transmit I/O enable bit, CLKX,FSX,DX,CLKS pins are serial port pins*/ MCBSP_PCR_RIOEN_SP, /* RIOEN = 0 Receive I/O enable bit, CLKR,FSR,DR,CLKS pins are serial port pins*/ MCBSP_PCR_FSXM_INTERNAL, /* FSXM = 1 发送帧同步模式：1为由MCBSP提供*/ MCBSP_PCR_FSRM_EXTERNAL, /* FSRM = 0 接收帧同步模式：0为FSR引脚提供*/ MCBSP_PCR_CLKXM_OUTPUT, /* CLKXM = 1 Transmit clock mode bit*/ MCBSP_PCR_CLKRM_INPUT, /* CLKRM = 0 Receive clock mode bit*/ MCBSP_PCR_SCLKME_NO, /* SCLKME = 0 Sample rate generator input clock mode bit,used with CLKSM to select the input clock*/ 0, /* DXSTAT = N/A */ MCBSP_PCR_FSXP_ACTIVEHIGH, /* FSXP = 0 Transmit frame-sync polarity bit, 0,transmit frame-sync pulses are active high*/ MCBSP_PCR_FSRP_ACTIVEHIGH, /* FSRP = 0 Receive frame-sync polarity bit, 0,receive frame-sync pulses are active high*/ MCBSP_PCR_CLKXP_RISING, /* CLKXP = 0 Transmit clock polarity bit,1,transmit data is driven on the rising edge of CLKX*/ MCBSP_PCR_CLKRP_FALLING /* CLKRP = 0 Receive clock polarity bit*/ ), MCBSP_RCERA_DEFAULT, //通道使能寄存器 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};
/* 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 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_FS_DISABLE, //(FS_ELEMENT 单元事件同步) DMA_DMACCR_SYNC_REVT1 //Synchronization control bits ), /* 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)(MCBSP_ADDR(DRR11)), /* DMACSSAL 源地址低位*/ 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 Transmit Side Configuration */DMA_Config dmaXmtConfig = { DMA_DMACSDP_RMK( DMA_DMACSDP_DSTBEN_NOBURST, DMA_DMACSDP_DSTPACK_OFF, DMA_DMACSDP_DST_PERIPH, //Destination selection :-外设mcbsp DMA_DMACSDP_SRCBEN_NOBURST, DMA_DMACSDP_SRCPACK_OFF, DMA_DMACSDP_SRC_DARAM, //Source selection :DARAM DMA_DMACSDP_DATATYPE_16BIT ), /* DMACSDP */ DMA_DMACCR_RMK( DMA_DMACCR_DSTAMODE_CONST, //Destination address mode :-恒定地址 DMA_DMACCR_SRCAMODE_POSTINC, //Source 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_ENDPROG_ON, DMA_DMACCR_REPEAT_OFF, DMA_DMACCR_AUTOINIT_OFF, DMA_DMACCR_EN_STOP, DMA_DMACCR_PRIO_LOW, DMA_DMACCR_FS_DISABLE, DMA_DMACCR_SYNC_XEVT1 //Synchronization control bits ), /* 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)&xmt[1], /* DMACSSAL */ 0, /* DMACSSAU */ (DMA_AdrPtr)(MCBSP_ADDR(DXR11)), /* DMACDSAL */ 0, /* DMACDSAU */ N, /* DMACEN */ 1, /* DMACFN */ 0, /* DMACFI */ 0 /* DMACEI */};
/* Define a DMA_Handle object to be used with DMA_open function */DMA_Handle hDmaRcv, hDmaXmt;
/* Define a MCBSP_Handle object to be used with MCBSP_open function */MCBSP_Handle hMcbsp;
volatile Uint16 transferComplete = FALSE;Uint16 err = 0;Uint16 old_intm;Uint16 xmtEventId, rcvEventId;
//———Function prototypes———/* Reference start of interrupt vector table *//* This symbol is defined in file, vectors.s55 */extern void VECSTART(void);
/* Protoype for interrupt functions */interrupt void dmaXmtIsr(void);interrupt void dmaRcvIsr(void);void taskFxn(void);
//———main routine———void main(void){ Uint16 i;
/* Initialize CSL library – This is REQUIRED !!! */ 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; }
/* A detailed explanation of MMC initialization is provided in mmc_setup example */ mmc0 = MMC_open(MMC_DEV1); MMC_setupNative(mmc0,&Init);
MMC_sendGoIdle(mmc0); for (count=0;count<4016;count++) asm(" NOP");
cardtype = MMC_sendOpCond(mmc0,0x00100000);
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);
printf ("Reading data from card…\n"); retVal = MMC_read(mmc0,0x219a00,datareceive,512); for (count = 0; count < 6000; ++count);
printf ("TEST PASSED\n");
/* Call function to effect transfer */ taskFxn();}
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)(MCBSP_ADDR(DRR11))) >> 15) & 0xFFFFu; srcAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DRR11))) << 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(DXR11))) >> 15) & 0xFFFFu; dstAddrLo = (Uint16)(((Uint32)(MCBSP_ADDR(DXR11))) << 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 */ xmtEventId = DMA_getEventId(hDmaXmt); rcvEventId = DMA_getEventId(hDmaRcv);
/* Temporarily disable interrupts and clear any pending */ /* interrupts for MCBSP transmit */ old_intm = IRQ_globalDisable();
/* Clear any pending interrupts for DMA channels */ IRQ_clear(xmtEventId); IRQ_clear(rcvEventId);
/* Enable DMA interrupt in IER register */ IRQ_enable(xmtEventId); IRQ_enable(rcvEventId);
/* Set Start Of Interrupt Vector Table */ IRQ_setVecs(0x10000);
/* Place DMA interrupt service addresses at associate vector */ IRQ_plug(xmtEventId,&dmaXmtIsr); IRQ_plug(rcvEventId,&dmaRcvIsr);
/* Write values from configuration structure to MCBSP control regs */ MCBSP_config(hMcbsp, &ConfigLoopBack16);
/* Write values from configuration structure to DMA control regs */ DMA_config(hDmaRcv,&dmaRcvConfig); DMA_config(hDmaXmt,&dmaXmtConfig);
#if 0 /* Take MCBSP transmit and receive out of reset */ MCBSP_start(hMcbsp, MCBSP_XMIT_START | MCBSP_RCV_START, 0u);
/* Prime MCBSP DXR */ while (!(MCBSP_xrdy(hMcbsp))){ ; } MCBSP_write16(hMcbsp,xmt[0]);
/* Enable all maskable interrupts */ IRQ_globalEnable();
/* Enable DMA */ DMA_start(hDmaRcv); DMA_start(hDmaXmt);
/* Start Sample Rate Generator and Enable Frame Sync */ MCBSP_start(hMcbsp, MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC, 0x300u);#else /* Enable all maskable interrupts */ IRQ_globalEnable();
/* Start Sample Rate Generator and Enable Frame Sync */ MCBSP_start(hMcbsp, MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC, 0x300u);
/* Enable DMA */ DMA_start(hDmaRcv); DMA_start(hDmaXmt);
/* Take MCBSP transmit and receive out of reset */ MCBSP_start(hMcbsp, MCBSP_XMIT_START | MCBSP_RCV_START, 0u);#endif /* 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 */ MCBSP_close(hMcbsp); DMA_close(hDmaRcv); DMA_close(hDmaXmt);}
interrupt void dmaXmtIsr(void) { DMA_stop(hDmaXmt); IRQ_disable(xmtEventId);}
interrupt void dmaRcvIsr(void) { DMA_stop(hDmaRcv); IRQ_disable(rcvEventId); transferComplete = TRUE;}
user4731232：
回复 Shine:
感谢您的回答，还有我想问下retVal = MMC_read(mmc0,0x219a00,datareceive,512);这句读取SD的程序，我如何更改DMA和MCBSP的设置？我看了下关于MCBSP读SD卡的说明，貌似还要发命令什么的，我上一条回复贴上了我的代码，但是提示说需要等待版主通过才行
