157 lines
4.5 KiB
C
157 lines
4.5 KiB
C
/*
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* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.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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* 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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/**
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* \addtogroup sensortag-cc26xx-buzzer
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* @{
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*
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* \file
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* Driver for the Sensortag Buzzer
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "buzzer.h"
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/*---------------------------------------------------------------------------*/
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#include <Board.h>
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#include <ti/drivers/PIN.h>
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#include <ti/drivers/Power.h>
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#include <ti/drivers/power/PowerCC26XX.h>
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#include <ti/drivers/pin/PINCC26XX.h>
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#include <ti/drivers/timer/GPTimerCC26XX.h>
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/*---------------------------------------------------------------------------*/
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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/*---------------------------------------------------------------------------*/
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/* Configure BUZZER pin */
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#ifndef Board_BUZZER
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# error "Board file doesn't define pin Board_BUZZER"
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#endif
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#define BUZZER_PIN Board_BUZZER
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/*---------------------------------------------------------------------------*/
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static const PIN_Config pin_table[] = {
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BUZZER_PIN | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW,
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PIN_TERMINATE
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};
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static PIN_State pin_state;
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static PIN_Handle pin_handle;
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static GPTimerCC26XX_Handle gpt_handle;
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static bool has_init;
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static volatile bool is_running;
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/*---------------------------------------------------------------------------*/
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bool
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buzzer_init()
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{
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if (has_init) {
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return true;
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}
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GPTimerCC26XX_Params gpt_params;
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GPTimerCC26XX_Params_init(&gpt_params);
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gpt_params.mode = GPT_CONFIG_16BIT;
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gpt_params.mode = GPT_MODE_PERIODIC_UP;
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gpt_params.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
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gpt_handle = GPTimerCC26XX_open(Board_GPTIMER0A, &gpt_params);
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if (!gpt_handle) {
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PIN_close(pin_handle);
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return false;
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}
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is_running = false;
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has_init = true;
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return true;
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}
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/*---------------------------------------------------------------------------*/
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bool
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buzzer_running()
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{
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return is_running;
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}
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/*---------------------------------------------------------------------------*/
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bool
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buzzer_start(uint32_t freq)
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{
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if (!has_init) {
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return false;
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}
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if (freq == 0) {
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return false;
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}
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if (is_running) {
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return true;
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}
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pin_handle = PIN_open(&pin_state, pin_table);
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if (!pin_handle) {
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return false;
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}
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Power_setDependency(PowerCC26XX_XOSC_HF );
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PINCC26XX_setMux(pin_handle, BUZZER_PIN, GPT_PIN_0A);
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// MCU runs at 48 MHz
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GPTimerCC26XX_Value load_value = 48000000 / freq;
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GPTimerCC26XX_setLoadValue(gpt_handle, load_value);
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GPTimerCC26XX_start(gpt_handle);
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is_running = true;
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return true;
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}
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/*---------------------------------------------------------------------------*/
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void
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buzzer_stop()
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{
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if (!gpt_handle) {
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return;
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}
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if (!is_running) {
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return;
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}
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Power_releaseDependency(PowerCC26XX_XOSC_HF );
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GPTimerCC26XX_stop(gpt_handle);
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PIN_close(pin_handle);
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is_running = false;
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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