Hi,
I am trying to get my sci working in DMA mode. I used halcogen example to get started with. Below are the sample code for that
/** @file HL_sys_main.c
* @brief Application main file
* @date 02-Mar-2016
* @version 04.05.02
*
* This file contains an empty main function,
* which can be used for the application.
*/
/*
* Copyright (C) 2009-2016 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"
/* 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 (SCI1 TX -> SCI4 RX) is needed in case LOOPBACKMODE is defined as 0 */
#define LOOPBACKMODE 0
/* 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 SCI1_TX_ADDR ((uint32_t)(&(sciREG1->TD)))
#define SCI1_RX_ADDR ((uint32_t)(&(sciREG1->RD)))
#define SCI4_TX_ADDR ((uint32_t)(&(sciREG4->TD)))
#define SCI4_RX_ADDR ((uint32_t)(&(sciREG4->RD)))
#else
#define SCI1_TX_ADDR ((uint32_t)(&(sciREG1->TD)) + 3)
#define SCI1_RX_ADDR ((uint32_t)(&(sciREG1->RD)) + 3)
#define SCI4_TX_ADDR ((uint32_t)(&(sciREG4->TD)) + 3)
#define SCI4_RX_ADDR ((uint32_t)(&(sciREG4->RD)) + 3)
#endif
#define DMA_SCI1_TX DMA_REQ31
#define DMA_SCI1_RX DMA_REQ30
#define DMA_SCI4_TX DMA_REQ43
#define DMA_SCI4_RX DMA_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 */
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(sciREG1, Digital_Lbk);
while (((sciREG1->FLR & SCI_TX_INT) == 0U) || ((sciREG1->FLR & 0x4) == 0x4))
{
} /* Wait */
/*Assign DMA request SCI1 transmit to Channel 0*/
dmaReqAssign(DMA_CH0, DMA_SCI1_TX);
/*Assign DMA request SCI1 receive to Channel 1*/
dmaReqAssign(DMA_CH1, DMA_SCI1_RX);
sciTxData = SCI1_TX_ADDR;
sciRxData = SCI1_RX_ADDR;
#else
while (((sciREG1->FLR & SCI_TX_INT) == 0U) || ((sciREG1->FLR & 0x4) == 0x4))
{
} /* Wait */
/*Assign DMA request SCI1 transmit to Channel 0*/
dmaReqAssign(DMA_CH0, DMA_SCI1_TX);
/*Assign DMA request SCI4 receive to Channel 1*/
dmaReqAssign(DMA_CH1, DMA_SCI1_RX);
sciTxData = SCI1_TX_ADDR;
sciRxData = SCI1_RX_ADDR;
#endif
/*Configure control packet for Channel 0*/
g_dmaCTRLPKT1.SADD = (uint32_t)TX_DATA; /* source address */
g_dmaCTRLPKT1.DADD = sciTxData; /* destination address */
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; /* destination addr 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 SCI1 Transmit and Receive DMA Request*/
sciREG1->SETINT |= SCI_SET_TX_DMA | SCI_SET_RX_DMA | SCI_SET_RX_DMA_ALL;
#else
/*Enable SCI1 Transmit and SCI1 Receive DMA Request*/
sciREG1->SETINT |= SCI_SET_TX_DMA;
sciREG1->SETINT |= SCI_SET_RX_DMA | SCI_SET_RX_DMA_ALL;
#endif
while(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 */
after doing some basic changes to work for the sciReg1, i am not able to see any data coming out and even loopback is not working. It get stuck to
while(dmaGetInterruptStatus(DMA_CH1, BTC) != TRUE);
Please help understand where i am wrong in this configuration.
