CCS/RM57L843: DMA access for EMIF async interface

Hi Marcel,

The following code can be used to move data from MCU RAM to EMIF SDRAM, and from SDRAM to RAM.

/* Include Files */

#include "HL_sys_common.h"

/* USER CODE BEGIN (1) */
#include "HL_emif.h"
#include "HL_sys_dma.h"
#include "HL_sys_core.h"


/* example data Pattern configuration */
#define E_COUNT 64 /*Element count*/
#define F_COUNT 16 /*Frame count*/
#define D_SIZE E_COUNT * F_COUNT


void loadDataPattern(uint32 psize, uint32* pptr, uint32 pattern);


#pragma SET_DATA_SECTION(".sharedRAM")
uint32 TXDATA_RAM[D_SIZE]; /* transmit buffer in sys ram */
uint32 RXDATA_RAM[D_SIZE]= {0}; /* receive buffer in sys ram */
g_dmaCTRL g_dmaCTRLPKT1, g_dmaCTRLPKT2; /* dma control packet configuration stack */

#pragma SET_DATA_SECTION()

/* 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) */
/* USER CODE END */

int main(void)
{
/* USER CODE BEGIN (3) */
/* enable IRQ interrupt */
uint16 i;
unsigned int *Addr32 = (unsigned int *)0x80001000; //08076000;
for(i=0;i<64;i++)
*Addr32++ = i+0xEFEFAB00;

_enable_IRQ_interrupt_();

emif_SDRAMInit();
/* - creating a data chunk in system ram to start with ... */
loadDataPattern(D_SIZE, &TXDATA_RAM[0], 0x5A5A5A5A);

/* - configuring dma control packets */
g_dmaCTRLPKT1.SADD = (uint32)TXDATA_RAM; /* source address */
g_dmaCTRLPKT1.DADD = (uint32)(0x80000000); //(0x08078000); /* destination address; SDRAM */
g_dmaCTRLPKT1.CHCTRL = 0; /* channel control */
g_dmaCTRLPKT1.FRCNT = F_COUNT; /* frame count */
g_dmaCTRLPKT1.ELCNT = E_COUNT; /* 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_PORTA_WRITE;
g_dmaCTRLPKT1.RDSIZE = ACCESS_32_BIT; /* read size */
g_dmaCTRLPKT1.WRSIZE = ACCESS_32_BIT; /* write size */
g_dmaCTRLPKT1.TTYPE = FRAME_TRANSFER ; /* transfer type */
g_dmaCTRLPKT1.ADDMODERD = ADDR_INC1; /* address mode read */
g_dmaCTRLPKT1.ADDMODEWR = ADDR_INC1; /* address mode write */
g_dmaCTRLPKT1.AUTOINIT = AUTOINIT_OFF; /* autoinit */


g_dmaCTRLPKT2.SADD = (uint32)(0x80001000); //0x08076000); /* source address */
g_dmaCTRLPKT2.DADD = (uint32)RXDATA_RAM; /* destination address */
g_dmaCTRLPKT2.CHCTRL = 0; /* channel control */
g_dmaCTRLPKT2.FRCNT = F_COUNT; /* frame count */
g_dmaCTRLPKT2.ELCNT = E_COUNT; /* 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 = PORTA_READ_PORTA_WRITE;
g_dmaCTRLPKT2.RDSIZE = ACCESS_32_BIT; /* read size */
g_dmaCTRLPKT2.WRSIZE = ACCESS_32_BIT; /* write size */
g_dmaCTRLPKT2.TTYPE = FRAME_TRANSFER ; /* transfer type */
g_dmaCTRLPKT2.ADDMODERD = ADDR_INC1; /* address mode read */
g_dmaCTRLPKT2.ADDMODEWR = ADDR_INC1; /* address mode write */
g_dmaCTRLPKT2.AUTOINIT = AUTOINIT_OFF; /* autoinit */

/* - setting dma control packets */
dmaSetCtrlPacket(DMA_CH1,g_dmaCTRLPKT1); //tx
dmaSetCtrlPacket(DMA_CH0,g_dmaCTRLPKT2); //rx

/* - setting the dma channel to trigger on h/w request */
dmaSetChEnable(DMA_CH1, DMA_SW);
dmaSetChEnable(DMA_CH0, DMA_SW);

/* Enable Block Transfer Complete interrupt for the receive after transfer complete */
dmaEnableInterrupt(DMA_CH0, BTC, DMA_INTA);


dmaEnable();

while(1); /* loop forever */

/* USER CODE END */

return 0;
}


/* USER CODE BEGIN (4) */

/** void loadDataPattern(uint32 psize, uint16* pptr)
*
* loading a randam data chunk into system ram
*
* pptr > sys ram address
* psize > chunkl size
*
*/
void loadDataPattern(uint32 psize, uint32* pptr, uint32 pattern)
{
int i;
for(i=0;i<psize;i++)
{
*(pptr++) = pattern + i;
}
}

/* USER CODE END */