DataRAM

Hi Ayoub,

Can you share, what is your setup? Which device & SDK do you use? Which TI board (beablebone black, starter kit, GP EVM, etc.. )?
Could you attach the whole program, in order to reproduce your use case?

I am not sure about the pruDataMem values, but in my opinion value 0/1/2/3 & address 0/1/2/3 are correct (loop goes from 0 to 3).

Best Regards,
Yordan

I use the AM3359, this is just a test program.
I use now data RAM and it works, the program I used is in the following:
Note: when I use a constant table c2/c25 to store or read from Data RAM, an error appears(I declared them in .hp)???
I had problem with defining some registers adress like cycle_counter. In the TRM they are offsets but I should add it to a value that I don't find?

>> Assembler program:
.origin 0
.entrypoint START

#include "pulse.hp"

START:

/* Enable OCP master port*/
lbco r0, CONST_PRUCFG, 4, 4
clr r0, r0, 4 /* Clear SYSCFG[STANDBY_INIT] to enable OCP master port*/
sbco r0, CONST_PRUCFG, 4, 4

mov r0, 0x00
mov r1, PRU1_CTRL + CTBIR_0
sbbo r0,r1,0,4
mov r0,0x0000 // adress of DRAM
mov r1,0x0000000A
sbbo r1,r0,0,4
mov r1,0x00000009
sbbo r1,r0,1,4
mov r1,0x00000008
sbbo r1,r0,2,4
/* signal c program done */
mov r31.b0, PRU1_ARM_INTERRUPT+16

halt


>> C program:

// Standard header files
#include <stdio.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>

// Driver header file
#include "prussdrv.h"
#include "pruss_intc_mapping.h"

#define PRU_NUM 1
#define PRU_PROG "./pulse.bin"
static void *pruDataMem;
static unsigned int *pruDataMem_int;
/******************************************************************************
* Global Function Definitions *
******************************************************************************/

int main (void)
{
int ret;
tpruss_intc_initdata pruss_intc_initdata = PRUSS_INTC_INITDATA;

printf("\nINFO: Starting %s example.\r\n", "led");
/* Initialize the PRU */
prussdrv_init ();

/* Open PRU Interrupt */
ret = prussdrv_open(PRU_EVTOUT_1);
if (ret)
{
printf("prussdrv_open open failed\n");
return (ret);
}

/***********Getting the interrupt initialized ******************/
prussdrv_pruintc_init(&pruss_intc_initdata);
/***************************************************************/

/******************Mapping DATARAM******************************/
prussdrv_map_prumem (PRUSS0_PRU1_DATARAM,&pruDataMem);
pruDataMem_int = (unsigned int*) pruDataMem;
/***************************************************************/

/**************** Execute example on PRU ***********************/
printf("\tINFO: Executing example.\r\n");
prussdrv_exec_program (PRU_NUM, PRU_PROG);
/***************************************************************/
/******** Wait until PRU0 has finished execution ***************/
printf("\tINFO: Waiting for HALT command.\r\n");
prussdrv_pru_wait_event (PRU_EVTOUT_1);
printf("\tINFO: PRU completed transfer.\r\n");
/***************************************************************/
for(ret=0; ret<=2; ret++)
{
printf("value %d: %i adress %d: %p\n",ret,*pruDataMem_int,ret, pruDataMem_int);
pruDataMem_int ++;
}

/***************************************************************/
prussdrv_pru_clear_event (PRU_EVTOUT_1, PRU1_ARM_INTERRUPT);
/***************************************************************/
/**********Disable PRU and close memory mapping*****************/
prussdrv_pru_disable(PRU_NUM);
prussdrv_exit ();
/***************************************************************/
return(0);
}