137 lines
4.2 KiB
C
137 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2016, University of Bristol - http://www.bristol.ac.uk
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. Neither the name of the copyright holder 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 HOLDER 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.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* \addtogroup cc26xx-adc-sensor
|
|
* @{
|
|
*
|
|
* \file
|
|
* Driver for the CC13xx/CC26xx ADC
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
#include "contiki.h"
|
|
#include "lib/sensors.h"
|
|
#include "dev/adc-sensor.h"
|
|
#include "sys/timer.h"
|
|
#include "lpm.h"
|
|
|
|
#include "ti-lib.h"
|
|
#include "driverlib/aux_adc.h"
|
|
#include "aux-ctrl.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdbool.h>
|
|
/*---------------------------------------------------------------------------*/
|
|
static uint8_t channel = ADC_COMPB_IN_AUXIO0;
|
|
static bool is_active = false;
|
|
|
|
static aux_consumer_module_t adc_aux = {
|
|
.clocks = AUX_WUC_ADI_CLOCK | AUX_WUC_ANAIF_CLOCK | AUX_WUC_SMPH_CLOCK
|
|
};
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
config(int type, int c)
|
|
{
|
|
switch(type) {
|
|
case SENSORS_ACTIVE:
|
|
is_active = c;
|
|
|
|
if(is_active) {
|
|
/* Request AUX access, with ADI and SMPH clocks */
|
|
aux_ctrl_register_consumer(&adc_aux);
|
|
|
|
ti_lib_aux_adc_select_input(channel);
|
|
} else {
|
|
aux_ctrl_unregister_consumer(&adc_aux);
|
|
}
|
|
break;
|
|
|
|
case ADC_SENSOR_SET_CHANNEL:
|
|
channel = c;
|
|
if(is_active) {
|
|
ti_lib_aux_adc_select_input(channel);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
status(int type)
|
|
{
|
|
switch(type) {
|
|
case SENSORS_ACTIVE:
|
|
if(is_active) {
|
|
return 1;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
value(int type)
|
|
{
|
|
if(type == ADC_SENSOR_VALUE) {
|
|
int val, adj_val, adj_mv;
|
|
|
|
if(!is_active) {
|
|
puts("ADC not active");
|
|
return 0;
|
|
}
|
|
|
|
ti_lib_aux_adc_enable_sync(AUXADC_REF_FIXED, AUXADC_SAMPLE_TIME_2P7_US,
|
|
AUXADC_TRIGGER_MANUAL);
|
|
|
|
ti_lib_aux_adc_gen_manual_trigger();
|
|
val = ti_lib_aux_adc_read_fifo();
|
|
adj_val = ti_lib_aux_adc_adjust_value_for_gain_and_offset(
|
|
val,
|
|
ti_lib_aux_adc_get_adjustment_gain(AUXADC_REF_FIXED),
|
|
ti_lib_aux_adc_get_adjustment_offset(AUXADC_REF_FIXED));
|
|
adj_mv = ti_lib_aux_adc_value_to_microvolts(AUXADC_FIXED_REF_VOLTAGE_NORMAL, adj_val);
|
|
ti_lib_aux_adc_disable();
|
|
|
|
return adj_mv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
SENSORS_SENSOR(adc_sensor, ADC_SENSOR, value, config, status);
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|