Hi,
Here is a step by step guide to use the GPTimer with NORTOS.
- Open CCS
- Import the example C:\ti\simplelink_cc2640r2_sdk_4_30_00_08\examples\nortos\CC2640R2_LAUNCHXL\drivers\gpiointerrupt\ccs
- Open the file gpiointerrupt.c
Replace the code in gpiointerrupt.c with:
/*
* Copyright (c) 2015-2019, Texas Instruments Incorporated
* All rights reserved.
*
* 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.
*/
#include <stdint.h>
#include <stddef.h>
#include <unistd.h>
/* Driver Header files */
#include <ti/drivers/GPIO.h>
#include <ti/drivers/timer/GPTimerCC26XX.h>
/* Example/Board Header files */
#include "Board.h"
GPTimerCC26XX_Handle hTimer;
/*
* ======== timerCallback ========
* Callback function for the timer interrupt
*/
void timerCallback(GPTimerCC26XX_Handle handle, GPTimerCC26XX_IntMask interruptMask) {
// interrupt callback code goes here. Minimize processing in interrupt.
GPIO_toggle(Board_GPIO_LED0);
}
/*
* ======== mainThread ========
*/
void *mainThread(void *arg0)
{
GPTimerCC26XX_Params params;
GPTimerCC26XX_Params_init(¶ms);
params.width = GPT_CONFIG_16BIT;
params.mode = GPT_MODE_PERIODIC;
params.direction = GPTimerCC26XX_DIRECTION_UP;
params.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
hTimer = GPTimerCC26XX_open(CC2640R2_LAUNCHXL_GPTIMER0, ¶ms);
if(hTimer == NULL) {
while(1);
}
GPTimerCC26XX_Value loadVal = 48000000 / 1000 - 1; //48000000 (48MHz) is the frequency of the CPU
GPTimerCC26XX_setLoadValue(hTimer, loadVal);
GPTimerCC26XX_registerInterrupt(hTimer, timerCallback, GPT_INT_TIMEOUT);
GPTimerCC26XX_start(hTimer);
while(1) {
usleep(50000);
}
return (NULL);
}
4. Build and run the code on a CC2640R2F launchpad with a logic analyzer attached to DIO6 (Red Led)
This is the c file (the only one that need to be modified):
/*
* Copyright (c) 2015-2019, Texas Instruments Incorporated
* All rights reserved.
*
* 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.
*/
#include <stdint.h>
#include <stddef.h>
#include <unistd.h>
/* Driver Header files */
#include <ti/drivers/GPIO.h>
#include <ti/drivers/timer/GPTimerCC26XX.h>
/* Example/Board Header files */
#include "Board.h"
GPTimerCC26XX_Handle hTimer;
/*
* ======== timerCallback ========
* Callback function for the timer interrupt
*/
void timerCallback(GPTimerCC26XX_Handle handle, GPTimerCC26XX_IntMask interruptMask) {
// interrupt callback code goes here. Minimize processing in interrupt.
GPIO_toggle(Board_GPIO_LED0);
}
/*
* ======== mainThread ========
*/
void *mainThread(void *arg0)
{
GPTimerCC26XX_Params params;
GPTimerCC26XX_Params_init(¶ms);
params.width = GPT_CONFIG_16BIT;
params.mode = GPT_MODE_PERIODIC;
params.direction = GPTimerCC26XX_DIRECTION_UP;
params.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
hTimer = GPTimerCC26XX_open(CC2640R2_LAUNCHXL_GPTIMER0, ¶ms);
if(hTimer == NULL) {
while(1);
}
GPTimerCC26XX_Value loadVal = 48000000 / 1000 - 1; //48000000 (48MHz) is the frequency of the CPU
GPTimerCC26XX_setLoadValue(hTimer, loadVal);
GPTimerCC26XX_registerInterrupt(hTimer, timerCallback, GPT_INT_TIMEOUT);
GPTimerCC26XX_start(hTimer);
while(1) {
usleep(50000);
}
return (NULL);
}
I hope this will help,
Best regards,
