TMS570LC4357: SCI1 DMA 数据发送不出去

TMS570LC4357配置SCI发送的DMA后，无法发送出数据。

具体代码：

uint32 SCI1_TX_DATA[32]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x33,0x33};

dmaReqAssign(DMA_CH0, 29);
g_dmaCTRLPKT.SADD = (uint32)(&SCI1_TX_DATA) ; /* source address */
g_dmaCTRLPKT.DADD = (uint32_t)(&(sciREG1->TD)); /* destination address */
g_dmaCTRLPKT.CHCTRL = 0;
g_dmaCTRLPKT.FRCNT = 8;
g_dmaCTRLPKT.ELCNT = 1; /* element destination offset */
g_dmaCTRLPKT.ELDOFFSET = 0; /* element destination offset */
g_dmaCTRLPKT.ELSOFFSET = 0; /* element destination offset */
g_dmaCTRLPKT.FRDOFFSET = 0; /* frame destination offset */
g_dmaCTRLPKT.FRSOFFSET = 0; /* frame destination offset */
g_dmaCTRLPKT.PORTASGN = 4;
g_dmaCTRLPKT.RDSIZE = ACCESS_32_BIT; /* read size */
g_dmaCTRLPKT.WRSIZE = ACCESS_32_BIT; /* write size */
g_dmaCTRLPKT.TTYPE = FRAME_TRANSFER ; /* transfer type */
g_dmaCTRLPKT.ADDMODERD = ADDR_INC1; /* address mode read */
g_dmaCTRLPKT.ADDMODEWR = ADDR_FIXED; /* address mode write */
g_dmaCTRLPKT.AUTOINIT = AUTOINIT_ON; /* auto init */

dmaSetCtrlPacket(DMA_CH0,g_dmaCTRLPKT);

dmaSetChEnable(DMA_CH0, DMA_HW);

sciREG1->SETINT = SCI_SET_TX_DMA;

串口没有发出数据。

Susan Yang：

对于数据发送，您可以使用 TXRDY flag . 当 SCI 将 SCITD 的内容传输到 SCITXSHF 时，TXRDY 标志被设置。

对于 SCI 接收，您可以使用 RXRDY 标志来启动 DMA 传输。当 SCI 将新接收的数据从 SCIRXSHF 寄存器传输到 SCIRD 缓冲区时，RXRDY 标志被设置。 

,

user6614170：

DMA无法将数据移到SCI的TD和移出RD。是什么原因？

,

Susan Yang：

我们有一个sci dma的例程，您是否有参考？

HALCoGen\v04.07.01\examples\TMS570LC43x

/** @example example_sci_dma.c
*This is an example which descibes the steps to create an example application which
*configures SCI transfer using DMA. The transmit buffer of the Mibspi RAM is
*loaded with data through the DMA.
*
*@b Step @b 1:
*
*Create a new project.
*
*Navigate: -> File -> New -> Project
*
*@image html example_createProject.jpg "Figure: Create a new Project"
*
*@b Step @b 2:
*
*Configure driver code generation:
*- Enable SCI driver
*- Disable others
*
*Navigate: -> TMS570LCxx /RM5x -> Enable Drivers
*
*@b Step @b 3:
*
*Configure SCI3:
*
*Navigate: -> TMS570Lxx /RMx -> SCI3
*
*@image html sci_uart.JPG"Figure: SCI Global settings"
*
*
*@image html sci_uart1.JPG"Figure: SCI Data Format"
*
*The example file example_sciDma.c can also be found in the examples folder: ../HALCoGen/examples
*
*@note HALCoGen generates an enpty main function in sys_main.c,
*please make sure that you link in the right main function or copy the source into the user code sections of this file.
*
*//** Copyright (C) 2009-2015 Texas Instruments Incorporated - www.ti.com
***Redistribution and use in source and binary forms, with or without*modification, are permitted provided that the following conditions*are met:
*
*Redistributions of source code must retain the above copyright*notice, this list of conditions and the following disclaimer.
*
*Redistributions in binary form must reproduce the above copyright
*notice, this list of conditions and the following disclaimer in the*documentation and/or other materials provided with the*distribution.
*
*Neither the name of Texas Instruments Incorporated nor the names of
*its contributors may be used to endorse or promote products derived
*from this software without specific prior written permission.
*
*THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT*LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
*A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT*OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,*SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT*LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
*DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON ANY
*THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT*INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE*OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*//* USER CODE BEGIN (0) */
/* USER CODE END *//* Include Files */#include "HL_sys_common.h"
#include "HL_system.h"/* USER CODE BEGIN (1) */
#include "HL_sys_dma.h"
#include "HL_sci.h"
#include "stdio.h"
/* USER CODE END *//** @fn void main(void)
*@brief Application main function
*@note This function is empty by default.
*
*This function is called after startup.
*The user can use this function to implement the application.
*//* USER CODE BEGIN (2) */
#define size 100
/* External connection (SCI3 TX -> SCI4 RX) is needed in case LOOPBACKMODE is defined as 0 */
#define LOOPBACKMODE 1/* Tx and Rx data buffer */
uint8_t TX_DATA[size], RX_DATA[size] = {0};/* Addresses of SCI 8-bit TX/Rx data */
#if ((__little_endian__ == 1) || (__LITTLE_ENDIAN__ == 1))
#define SCI3_TX_ADDR ((uint32_t)(&(sciREG3->TD)))
#define SCI3_RX_ADDR ((uint32_t)(&(sciREG3->RD)))
#define SCI4_TX_ADDR ((uint32_t)(&(sciREG4->TD)))
#define SCI4_RX_ADDR ((uint32_t)(&(sciREG4->RD)))
#else
#define SCI3_TX_ADDR ((uint32_t)(&(sciREG3->TD)) + 3)
#define SCI3_RX_ADDR ((uint32_t)(&(sciREG3->RD)) + 3)
#define SCI4_TX_ADDR ((uint32_t)(&(sciREG4->TD)) + 3)
#define SCI4_RX_ADDR ((uint32_t)(&(sciREG4->RD)) + 3)
#endif#define DMA_SCI3_TXDMA_REQ31
#define DMA_SCI3_RXDMA_REQ30
#define DMA_SCI4_TXDMA_REQ43
#define DMA_SCI4_RXDMA_REQ42#define SCI_SET_TX_DMA(1<<16)
#define SCI_SET_RX_DMA(1<<17)
#define SCI_SET_RX_DMA_ALL(1<<18)
/* USER CODE END */uint8	emacAddress[6U] ={0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU};
uint32emacPhyAddress	=	0U;void main(void)
{
/* USER CODE BEGIN (3) */uint32 sciTxData, sciRxData;int i;g_dmaCTRL g_dmaCTRLPKT1, g_dmaCTRLPKT2;/*Load source data*/for (i=0; i<size; i++){TX_DATA[i] = i;}/*Initialize SCI*/sciInit();#if LOOPBACKMODE == 1/* Enable SCI loopback */sciEnableLoopback(sciREG3, Digital_Lbk);while (((sciREG3->FLR & SCI_TX_INT) == 0U) || ((sciREG3->FLR & 0x4) == 0x4)){} /* Wait *//*Assign DMA request SCI3 transmit to Channel 0*/dmaReqAssign(DMA_CH0, DMA_SCI3_TX);/*Assign DMA request SCI3 receive to Channel 1*/dmaReqAssign(DMA_CH1, DMA_SCI3_RX);sciTxData = SCI3_TX_ADDR;sciRxData = SCI3_RX_ADDR;#elsewhile (((sciREG3->FLR & SCI_TX_INT) == 0U) || ((sciREG3->FLR & 0x4) == 0x4)){} /* Wait *//*Assign DMA request SCI3 transmit to Channel 0*/dmaReqAssign(DMA_CH0, DMA_SCI3_TX);/*Assign DMA request SCI4 receive to Channel 1*/dmaReqAssign(DMA_CH1, DMA_SCI4_RX);sciTxData = SCI3_TX_ADDR;sciRxData = SCI4_RX_ADDR;#endif/*Configure control packet for Channel 0*/g_dmaCTRLPKT1.SADD= (uint32_t)TX_DATA;	/* source address*/g_dmaCTRLPKT1.DADD= sciTxData;/* destinationaddress*/g_dmaCTRLPKT1.CHCTRL= 0;/* channel control*/g_dmaCTRLPKT1.FRCNT= size;/* frame count*/g_dmaCTRLPKT1.ELCNT= 1;/* element count*/g_dmaCTRLPKT1.ELDOFFSET = 0;/* element destination offset */g_dmaCTRLPKT1.ELSOFFSET = 0;/* element destination offset */g_dmaCTRLPKT1.FRDOFFSET = 0;/* frame destination offset*/g_dmaCTRLPKT1.FRSOFFSET = 0;/* frame destination offset*/g_dmaCTRLPKT1.PORTASGN= PORTA_READ_PORTB_WRITE;g_dmaCTRLPKT1.RDSIZE= ACCESS_8_BIT;/* read size*/g_dmaCTRLPKT1.WRSIZE= ACCESS_8_BIT;/* write size*/g_dmaCTRLPKT1.TTYPE= FRAME_TRANSFER;/* transfer type*/g_dmaCTRLPKT1.ADDMODERD = ADDR_INC1;/* address mode read*/g_dmaCTRLPKT1.ADDMODEWR = ADDR_FIXED;/* address mode write*/g_dmaCTRLPKT1.AUTOINIT= AUTOINIT_OFF;/* autoinit*//*Configure control packet for Channel 1*/g_dmaCTRLPKT2.SADD= sciRxData;/* source address*/g_dmaCTRLPKT2.DADD= (uint32_t)RX_DATA;	/* destinationaddr ss*/g_dmaCTRLPKT2.CHCTRL= 0;/* channel control*/g_dmaCTRLPKT2.FRCNT= size;/* frame count*/g_dmaCTRLPKT2.ELCNT= 1;/* element count*/g_dmaCTRLPKT2.ELDOFFSET = 0;/* element destination offset */g_dmaCTRLPKT2.ELSOFFSET = 0;/* element destination offset */g_dmaCTRLPKT2.FRDOFFSET = 0;/* frame destination offset*/g_dmaCTRLPKT2.FRSOFFSET = 0;/* frame destination offset*/g_dmaCTRLPKT2.PORTASGN= PORTB_READ_PORTA_WRITE;g_dmaCTRLPKT2.RDSIZE= ACCESS_8_BIT;/* read size*/g_dmaCTRLPKT2.WRSIZE= ACCESS_8_BIT;/* write size*/g_dmaCTRLPKT2.TTYPE= FRAME_TRANSFER;/* transfer type*/g_dmaCTRLPKT2.ADDMODERD = ADDR_FIXED;/* address mode read*/g_dmaCTRLPKT2.ADDMODEWR = ADDR_INC1;/* address mode write*/g_dmaCTRLPKT2.AUTOINIT= AUTOINIT_OFF;/* autoinit*//*Set control packet for channel 0 and 1*/dmaSetCtrlPacket(DMA_CH0, g_dmaCTRLPKT1);dmaSetCtrlPacket(DMA_CH1, g_dmaCTRLPKT2);/*Set dma channel 0 and 1 to trigger on hardware request*/dmaSetChEnable(DMA_CH0, DMA_HW);dmaSetChEnable(DMA_CH1, DMA_HW);/*Enable DMA*/dmaEnable();#if LOOPBACKMODE == 1/*Enable SCI3 Transmit and Receive DMA Request*/sciREG3->SETINT |= SCI_SET_TX_DMA | SCI_SET_RX_DMA | SCI_SET_RX_DMA_ALL;#else/*Enable SCI3 Transmit and SCI4 Receive DMA Request*/sciREG3->SETINT |= SCI_SET_TX_DMA;sciREG4->SETINT |= SCI_SET_RX_DMA | SCI_SET_RX_DMA_ALL;
#endifwhile(dmaGetInterruptStatus(DMA_CH1, BTC) != TRUE);for(i=0; i<size; i++){if(RX_DATA[i] != TX_DATA[i]){break;}}if(i<size){printf("Fail\n");}else{printf("Pass\n");}while(1);/* USER CODE END */
}/* USER CODE BEGIN (4) */
/* USER CODE END */