forked from jstampfl/Pruuart
/
pu.c
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/
pu.c
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/*pu.c - PRUSS UART
* uses PRUSS Uart to read data from ADAFRUIT Ultimate GPS
*
* The C-code is derived from:
* 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.
* ============================================================================
*/
/*****************************************************************************
* Copyright (c) John Stampfl 2014
* This code is provided for your reading pleasure.
* anyother use is at your own risk.
*
*pu.c uses the PRUSS to read data from
*pu.c the ADAFRUIT Ultimate GPS
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <prussdrv.h>
#include <pruss_intc_mapping.h>
#define PRU_NUM 0
#define AM33XX
static int LOCAL_exampleInit ( unsigned short pruNum );
static int LOCAL_pr ( unsigned short pruNum );
static void *pruDataMem;
static unsigned int *pruDataMem_int;
static char *pdata;
void signal_callback_handler(int signum) {
printf("Caught signal# %d\n",signum);
exit(signum);
}
int main (void)
{
int ret1,i;
int fd,len;
char buf[64];
unsigned int ret,value;
tpruss_intc_initdata pruss_intc_initdata = PRUSS_INTC_INITDATA;
signal(SIGINT, signal_callback_handler);
printf("\nINFO: Starting %s example.\r\n", "pt - SR04");
/* 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, "./pu.bin");
printf("\tINFO: Waiting for \r\n");
while(1) {
prussdrv_pru_wait_event (PRU_EVTOUT_0);
prussdrv_pru_clear_event (PRU_EVTOUT_0, PRU0_ARM_INTERRUPT);
ret1 = LOCAL_pr(PRU_NUM); // go get & print result
}
usleep (500000); //Just pause so don't go too fast
prussdrv_pru_disable (PRU_NUM);
prussdrv_exit ();
sleep(20);
return(0);
}
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);
}
pdata = (char*) pruDataMem;
pruDataMem_int = (unsigned int*) pruDataMem;
return(0);
}
static int LOCAL_pr ( unsigned short pruNum )
{
int i;
//Here read data from pru memory
printf("data %s\n",pdata);
return 0;
}