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gpioblink.c
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gpioblink.c
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/*
* PRU_memAccessPRUDataRam.c
*
* Copyright (C) 2012 Texas Instruments Incorporated - http://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.
*
*/
/*
* ============================================================================
* Copyright (c) Texas Instruments Inc 2010-12
*
* Use of this software is controlled by the terms and conditions found in the
* license agreement under which this software has been supplied or provided.
* ============================================================================
*/
/*****************************************************************************
* PRU_memAccessPRUDataRam.c
*
* The PRU reads and stores values into the PRU Data RAM memory. PRU Data RAM
* memory has an address in both the local data memory map and global memory
* map. The example accesses the local Data RAM using both the local address
* through a register pointed base address and the global address pointed by
* entries in the constant table.
*
******************************************************************************/
/*****************************************************************************
* Include Files *
*****************************************************************************/
#include <stdio.h>
// Driver header file
#include <prussdrv.h>
#include <pruss_intc_mapping.h>
/*****************************************************************************
* Explicit External Declarations *
*****************************************************************************/
/*****************************************************************************
* Local Macro Declarations *
*****************************************************************************/
#define PRU_NUM 0
#define ADDEND1 0x0010F012u
#define ADDEND2 0x0000567Au
#define AM33XX
/*****************************************************************************
* Local Typedef Declarations *
*****************************************************************************/
/*****************************************************************************
* Local Function Declarations *
*****************************************************************************/
static int LOCAL_exampleInit ( unsigned short pruNum );
static unsigned short LOCAL_examplePassed ( unsigned short pruNum );
/*****************************************************************************
* Local Variable Definitions *
*****************************************************************************/
/*****************************************************************************
* Intertupt Service Routines *
*****************************************************************************/
/*****************************************************************************
* Global Variable Definitions *
*****************************************************************************/
static void *pruDataMem;
static unsigned int *pruDataMem_int;
/*****************************************************************************
* Global Function Definitions *
*****************************************************************************/
int main (void)
{
unsigned int ret;
tpruss_intc_initdata pruss_intc_initdata = PRUSS_INTC_INITDATA;
printf("\nINFO: Starting %s example.\r\n", "gpioblink");
/* Initialize the PRU */
prussdrv_init ();
/* Open PRU Interrupt */
ret = prussdrv_open(PRU_EVTOUT_0);
if (ret)
{
printf("prussdrv_open open failed\n");
return (ret);
}
/* Get the interrupt initialized */
prussdrv_pruintc_init(&pruss_intc_initdata);
/* Initialize example */
printf("\tINFO: Initializing example.\r\n");
LOCAL_exampleInit(PRU_NUM);
/* Execute example on PRU */
printf("\tINFO: Executing example.\r\n");
prussdrv_exec_program (PRU_NUM, "./gpioblink.bin");
/* Wait until PRU0 has finished execution */
printf("\tINFO: Waiting for HALT command.\r\n");
prussdrv_pru_wait_event (PRU_EVTOUT_0);
printf("\tINFO: PRU completed transfer.\r\n");
prussdrv_pru_clear_event (PRU0_ARM_INTERRUPT);
/* Check if example passed */
if ( LOCAL_examplePassed(PRU_NUM) )
{
printf("INFO: Example executed succesfully.\r\n");
}
else
{
printf("INFO: Example failed.\r\n");
}
/* Disable PRU and close memory mapping*/
prussdrv_pru_disable (PRU_NUM);
prussdrv_exit ();
return(0);
}
/*****************************************************************************
* Local Function Definitions *
*****************************************************************************/
static int LOCAL_exampleInit ( unsigned short pruNum )
{
//Initialize pointer to PRU data memory
if (pruNum == 0)
{
prussdrv_map_prumem (PRUSS0_PRU0_DATARAM, &pruDataMem);
}
else if (pruNum == 1)
{
prussdrv_map_prumem (PRUSS0_PRU1_DATARAM, &pruDataMem);
}
pruDataMem_int = (unsigned int*) pruDataMem;
// Flush the values in the PRU data memory locations
pruDataMem_int[1] = 0x00;
pruDataMem_int[2] = 0x00;
return(0);
}
static unsigned short LOCAL_examplePassed ( unsigned short pruNum )
{
return ((pruDataMem_int[1] == ADDEND1) & (pruDataMem_int[2] == ADDEND1 + ADDEND2));
}