138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/*
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* Copyright (c) 2016, University of Bristol - http://www.bristol.ac.uk
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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 cc26xx-adc-sensor
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* @{
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*
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* \file
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* Driver for the CC13xx/CC26xx ADC
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "lib/sensors.h"
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#include "dev/adc-sensor.h"
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#include "gpio-interrupt.h"
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#include "sys/timer.h"
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#include "lpm.h"
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#include "ti-lib.h"
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#include "driverlib/aux_adc.h"
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#include "aux-ctrl.h"
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#include <stdio.h>
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#include <stdbool.h>
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/*---------------------------------------------------------------------------*/
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static uint8_t channel = ADC_COMPB_IN_AUXIO0;
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static bool is_active = false;
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static aux_consumer_module_t adc_aux = {
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.clocks = AUX_WUC_ADI_CLOCK | AUX_WUC_ANAIF_CLOCK | AUX_WUC_SMPH_CLOCK
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};
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/*---------------------------------------------------------------------------*/
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static int
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config(int type, int c)
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{
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switch(type) {
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case SENSORS_ACTIVE:
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is_active = c;
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if(is_active) {
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/* Request AUX access, with ADI and SMPH clocks */
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aux_ctrl_register_consumer(&adc_aux);
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ti_lib_aux_adc_select_input(channel);
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} else {
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aux_ctrl_unregister_consumer(&adc_aux);
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}
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break;
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case ADC_SENSOR_SET_CHANNEL:
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channel = c;
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if(is_active) {
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ti_lib_aux_adc_select_input(channel);
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}
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break;
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default:
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break;
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}
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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switch(type) {
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case SENSORS_ACTIVE:
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if(is_active) {
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return 1;
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}
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break;
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default:
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break;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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value(int type)
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{
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if(type == ADC_SENSOR_VALUE) {
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int val, adj_val, adj_mv;
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if(!is_active) {
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puts("ADC not active");
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return 0;
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}
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ti_lib_aux_adc_enable_sync(AUXADC_REF_FIXED, AUXADC_SAMPLE_TIME_2P7_US,
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AUXADC_TRIGGER_MANUAL);
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ti_lib_aux_adc_gen_manual_trigger();
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val = ti_lib_aux_adc_read_fifo();
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adj_val = ti_lib_aux_adc_adjust_value_for_gain_and_offset(
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val,
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ti_lib_aux_adc_get_adjustment_gain(AUXADC_REF_FIXED),
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ti_lib_aux_adc_get_adjustment_offset(AUXADC_REF_FIXED));
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adj_mv = ti_lib_aux_adc_value_to_microvolts(AUXADC_FIXED_REF_VOLTAGE_NORMAL, adj_val);
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ti_lib_aux_adc_disable();
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return adj_mv;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(adc_sensor, ADC_SENSOR, value, config, status);
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/*---------------------------------------------------------------------------*/
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/** @} */
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