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208 lines
6.1 KiB
C
208 lines
6.1 KiB
C
/*
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* Copyright (c) 2015, Zolertia - http://www.zolertia.com
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup remote-examples
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* @{
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*
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* \defgroup remote-test-pwm Test the CC2538 PWM driver
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*
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* Demonstrates the use of the CC2538 PWM driver for the Zolertia's Zoul boards
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* The PWM timer is stopped when dropping below PM0, alternatively you can set
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* LPM_CONF_MAX_PM to zero, or call lpm_max_pm(0). In this example is not
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* needed as we disable RDC in the Makefile, and the CC2538 never drops below
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* PM0
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*
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* @{
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*
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* \file
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* A quick program for testing the CC2538 PWM driver
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* \author
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* Javier Sanchez <jsanchez@zolertia.com>
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* Antonio Lignan <alinan@zolertia.com>
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*/
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#include "contiki.h"
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#include "cpu.h"
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#include "dev/leds.h"
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#include "dev/watchdog.h"
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#include "dev/sys-ctrl.h"
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#include "pwm.h"
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#include "systick.h"
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#include "lpm.h"
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#include "dev/ioc.h"
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#include <stdio.h>
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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typedef struct {
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uint8_t timer;
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uint8_t ab;
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uint8_t port;
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uint8_t pin;
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uint8_t duty;
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uint8_t off_state;
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uint32_t freq;
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} pwm_config_t;
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/*---------------------------------------------------------------------------*/
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#define MAX_PWM 4
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static const pwm_config_t pwm_num[MAX_PWM] = {
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{
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.timer = PWM_TIMER_1,
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.ab = PWM_TIMER_A,
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.port = GPIO_D_NUM,
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.pin = 5,
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.duty = 15,
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.freq = 1,
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.off_state = PWM_OFF_WHEN_STOP,
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}, {
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.timer = PWM_TIMER_1,
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.ab = PWM_TIMER_B,
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.port = GPIO_D_NUM,
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.pin = 4,
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.duty = 35,
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.freq = 100,
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.off_state = PWM_ON_WHEN_STOP,
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}, {
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.timer = PWM_TIMER_2,
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.ab = PWM_TIMER_A,
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.port = GPIO_D_NUM,
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.pin = 3,
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.duty = 50,
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.freq = 1000,
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.off_state = PWM_OFF_WHEN_STOP,
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}, {
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.timer = PWM_TIMER_2,
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.ab = PWM_TIMER_B,
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.port = GPIO_D_NUM,
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.pin = 2,
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.duty = 85,
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.freq = 160000,
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.off_state = PWM_ON_WHEN_STOP,
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}
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};
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static uint8_t pwm_en[MAX_PWM];
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/*---------------------------------------------------------------------------*/
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#if DEBUG
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static const char *
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gpt_name(uint8_t timer)
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{
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switch(timer) {
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case PWM_TIMER_0:
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return "PWM TIMER 0";
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case PWM_TIMER_1:
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return "PWM TIMER 1";
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case PWM_TIMER_2:
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return "PWM TIMER 2";
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case PWM_TIMER_3:
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return "PWM TIMER 3";
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default:
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return "Unknown";
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}
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}
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#endif
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/*---------------------------------------------------------------------------*/
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static struct etimer et;
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/*---------------------------------------------------------------------------*/
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PROCESS(cc2538_pwm_test, "cc2538 pwm test");
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AUTOSTART_PROCESSES(&cc2538_pwm_test);
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(cc2538_pwm_test, ev, data)
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{
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PROCESS_BEGIN();
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uint8_t i;
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memset(pwm_en, 0, MAX_PWM);
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PRINTF("\nStarting the test\n");
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for(i = 0; i < MAX_PWM; i++) {
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if(pwm_enable(pwm_num[i].freq, pwm_num[i].duty,
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pwm_num[i].timer, pwm_num[i].ab) == PWM_SUCCESS) {
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pwm_en[i] = 1;
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PRINTF("%s (%u) configuration OK\n", gpt_name(pwm_num[i].timer),
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pwm_num[i].ab);
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}
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}
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while(1) {
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for(i = 0; i < MAX_PWM; i++) {
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if((pwm_en[i]) &&
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(pwm_start(pwm_num[i].timer, pwm_num[i].ab,
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pwm_num[i].port, pwm_num[i].pin) != PWM_SUCCESS)) {
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pwm_en[i] = 0;
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PRINTF("%s (%u) failed to start \n", gpt_name(pwm_num[i].timer),
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pwm_num[i].ab);
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}
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}
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etimer_set(&et, CLOCK_SECOND * 2);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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for(i = 0; i < MAX_PWM; i++) {
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if((pwm_en[i]) &&
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(pwm_toggle_direction(pwm_num[i].timer,
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pwm_num[i].ab) != PWM_SUCCESS)) {
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PRINTF("%s (%u) invert failed \n", gpt_name(pwm_num[i].timer),
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pwm_num[i].ab);
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}
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}
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etimer_set(&et, CLOCK_SECOND * 2);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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for(i = 0; i < MAX_PWM; i++) {
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if((pwm_en[i]) &&
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(pwm_stop(pwm_num[i].timer, pwm_num[i].ab,
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pwm_num[i].port, pwm_num[i].pin,
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pwm_num[i].off_state) != PWM_SUCCESS)) {
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pwm_en[i] = 0;
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PRINTF("%s (%u) failed to stop\n", gpt_name(pwm_num[i].timer),
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pwm_num[i].ab);
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}
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}
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etimer_set(&et, CLOCK_SECOND * 2);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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* @}
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*/
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