Add CC13xx/CC26xx ADC driver

2016-04-21 16:55:01 +03:00 · 2016-04-21 16:55:01 +03:00 · 487547d8af
commit 487547d8af
parent 43b8bf3d30
3 changed files with 195 additions and 1 deletions
--- a/cpu/cc26xx-cc13xx/dev/adc-sensor.c
+++ b/cpu/cc26xx-cc13xx/dev/adc-sensor.c
@ -0,0 +1,133 @@
+/*
+ * 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 "gpio-interrupt.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;
+
+    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();
+
+    ti_lib_aux_adc_disable();
+
+    return val;
+  }
+
+  return 0;
+}
+/*---------------------------------------------------------------------------*/
+SENSORS_SENSOR(adc_sensor, ADC_SENSOR, value, config, status);
+/*---------------------------------------------------------------------------*/
+/** @} */