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targets/TARGET_Atmel/TARGET_SAM_CortexM4/drivers/adc/adc2.c@188:60408c49b6d4, 2018-09-20 (annotated)

Committer:
WaleedElmughrabi
Date:
Thu Sep 20 16:11:23 2018 +0000
Revision:
188:60408c49b6d4
Parent:
149:156823d33999 
Fork modified for BG96 error

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 107:414e9c822e99 1 /**
mbed_official 107:414e9c822e99 2 * \file
mbed_official 107:414e9c822e99 3 *
mbed_official 107:414e9c822e99 4 * \brief ADC Controller driver.
mbed_official 107:414e9c822e99 5 *
mbed_official 107:414e9c822e99 6 * Copyright (c) 2013-2015 Atmel Corporation. All rights reserved.
mbed_official 107:414e9c822e99 7 *
mbed_official 107:414e9c822e99 8 * \asf_license_start
mbed_official 107:414e9c822e99 9 *
mbed_official 107:414e9c822e99 10 * \page License
mbed_official 107:414e9c822e99 11 *
mbed_official 107:414e9c822e99 12 * Redistribution and use in source and binary forms, with or without
mbed_official 107:414e9c822e99 13 * modification, are permitted provided that the following conditions are met:
mbed_official 107:414e9c822e99 14 *
mbed_official 107:414e9c822e99 15 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 107:414e9c822e99 16 * this list of conditions and the following disclaimer.
mbed_official 107:414e9c822e99 17 *
mbed_official 107:414e9c822e99 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 107:414e9c822e99 19 * this list of conditions and the following disclaimer in the documentation
mbed_official 107:414e9c822e99 20 * and/or other materials provided with the distribution.
mbed_official 107:414e9c822e99 21 *
mbed_official 107:414e9c822e99 22 * 3. The name of Atmel may not be used to endorse or promote products derived
mbed_official 107:414e9c822e99 23 * from this software without specific prior written permission.
mbed_official 107:414e9c822e99 24 *
mbed_official 107:414e9c822e99 25 * 4. This software may only be redistributed and used in connection with an
mbed_official 107:414e9c822e99 26 * Atmel microcontroller product.
mbed_official 107:414e9c822e99 27 *
mbed_official 107:414e9c822e99 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
mbed_official 107:414e9c822e99 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 107:414e9c822e99 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
mbed_official 107:414e9c822e99 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
mbed_official 107:414e9c822e99 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 107:414e9c822e99 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
mbed_official 107:414e9c822e99 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
mbed_official 107:414e9c822e99 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
mbed_official 107:414e9c822e99 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
mbed_official 107:414e9c822e99 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 107:414e9c822e99 38 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 107:414e9c822e99 39 *
mbed_official 107:414e9c822e99 40 * \asf_license_stop
mbed_official 107:414e9c822e99 41 *
mbed_official 107:414e9c822e99 42 */
mbed_official 107:414e9c822e99 43 /*
mbed_official 107:414e9c822e99 44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
mbed_official 107:414e9c822e99 45 */
mbed_official 107:414e9c822e99 46
mbed_official 107:414e9c822e99 47 #include "adc2.h"
mbed_official 107:414e9c822e99 48 #include "sleepmgr.h"
mbed_official 107:414e9c822e99 49 #include "status_codes.h"
mbed_official 107:414e9c822e99 50 #include "sysclk.h"
mbed_official 107:414e9c822e99 51 #include "pmc.h"
mbed_official 107:414e9c822e99 52
mbed_official 107:414e9c822e99 53 /**
mbed_official 107:414e9c822e99 54 * \defgroup sam_drivers_adc2_group Analog-to-Digital Controller
mbed_official 107:414e9c822e99 55 *
mbed_official 107:414e9c822e99 56 * See \ref sam_adc2_quickstart.
mbed_official 107:414e9c822e99 57 *
mbed_official 107:414e9c822e99 58 * Driver for the Analog-to-Digital Controller. This driver provides access to
mbed_official 107:414e9c822e99 59 * the main features of the ADC controller.
mbed_official 107:414e9c822e99 60 *
mbed_official 107:414e9c822e99 61 * @{
mbed_official 107:414e9c822e99 62 */
mbed_official 107:414e9c822e99 63
mbed_official 107:414e9c822e99 64 /* The number of channel in channel sequence1 register */
mbed_official 107:414e9c822e99 65 #define ADC_SEQ1_CHANNEL_NUM (8UL)
mbed_official 107:414e9c822e99 66
mbed_official 107:414e9c822e99 67 /* The number of ADC interrupt source */
mbed_official 107:414e9c822e99 68 #define ADC_NUM_OF_INTERRUPT_SOURCE (24UL)
mbed_official 107:414e9c822e99 69
mbed_official 107:414e9c822e99 70
mbed_official 107:414e9c822e99 71 const uint32_t adc_interrupt_mask[ADC_NUM_OF_INTERRUPT_SOURCE] = {
mbed_official 107:414e9c822e99 72 ADC_ISR_EOC0, ADC_ISR_EOC1, ADC_ISR_EOC2, ADC_ISR_EOC3,
mbed_official 107:414e9c822e99 73 ADC_ISR_EOC4, ADC_ISR_EOC5, ADC_ISR_EOC6, ADC_ISR_EOC7,
mbed_official 107:414e9c822e99 74 #if (SAM4N)
mbed_official 107:414e9c822e99 75 ADC_ISR_EOC8, ADC_ISR_EOC9, ADC_ISR_EOC10, ADC_ISR_EOC11,
mbed_official 107:414e9c822e99 76 ADC_ISR_EOC12, ADC_ISR_EOC13, ADC_ISR_EOC14, ADC_ISR_EOC15,
mbed_official 107:414e9c822e99 77 ADC_ISR_EOC16,
mbed_official 107:414e9c822e99 78 #endif
mbed_official 107:414e9c822e99 79 #ifdef TEMP_SENSOR
mbed_official 107:414e9c822e99 80 ADC_ISR_TEMPCHG,
mbed_official 107:414e9c822e99 81 #endif
mbed_official 107:414e9c822e99 82 ADC_ISR_EOCAL, ADC_ISR_DRDY,
mbed_official 107:414e9c822e99 83 ADC_ISR_GOVRE, ADC_ISR_COMPE, ADC_ISR_ENDRX, ADC_ISR_RXBUFF,
mbed_official 107:414e9c822e99 84 };
mbed_official 107:414e9c822e99 85
mbed_official 107:414e9c822e99 86 adc_callback_t adc_callback_pointer[ADC_NUM_OF_INTERRUPT_SOURCE];
mbed_official 107:414e9c822e99 87
mbed_official 107:414e9c822e99 88 /**
mbed_official 107:414e9c822e99 89 * \brief Get the ADC default configurations.
mbed_official 107:414e9c822e99 90 *
mbed_official 107:414e9c822e99 91 * Use to initialize the configuration structure to known default values. This
mbed_official 107:414e9c822e99 92 * function should be called at the start of any ADC initiation.
mbed_official 107:414e9c822e99 93 *
mbed_official 107:414e9c822e99 94 * The default configuration is as follows:
mbed_official 107:414e9c822e99 95 * - 10-bit resolution
mbed_official 107:414e9c822e99 96 * - ADC clock frequency is 6MHz
mbed_official 107:414e9c822e99 97 * - Start Up Time is 64 periods ADC clock
mbed_official 107:414e9c822e99 98 * - Tracking Time is 3 periods of ADC clock
mbed_official 107:414e9c822e99 99 * - Transfer Period field shall be programmed with 2 as datasheet said
mbed_official 107:414e9c822e99 100 * - The controller converts channels in a simple numeric order
mbed_official 107:414e9c822e99 101 * - Appends the channel number to the conversion result in ADC_LCDR register
mbed_official 107:414e9c822e99 102 * - Only a Single Trigger is required to get an averaged value
mbed_official 107:414e9c822e99 103 *
mbed_official 107:414e9c822e99 104 * \param cfg Pointer to configuration structure to be initiated.
mbed_official 107:414e9c822e99 105 */
mbed_official 107:414e9c822e99 106 void adc_get_config_defaults(struct adc_config *const cfg)
mbed_official 107:414e9c822e99 107 {
mbed_official 107:414e9c822e99 108 /* Sanity check argument. */
mbed_official 107:414e9c822e99 109 Assert(cfg);
mbed_official 107:414e9c822e99 110
mbed_official 107:414e9c822e99 111 #if SAMG55
mbed_official 107:414e9c822e99 112 cfg->resolution = ADC_12_BITS;
mbed_official 107:414e9c822e99 113 #else
mbed_official 107:414e9c822e99 114 cfg->resolution = ADC_10_BITS;
mbed_official 107:414e9c822e99 115 #endif
mbed_official 107:414e9c822e99 116 cfg->mck = sysclk_get_cpu_hz();
mbed_official 107:414e9c822e99 117 cfg->adc_clock = 6000000UL;
mbed_official 107:414e9c822e99 118 cfg->startup_time = ADC_STARTUP_TIME_4;
mbed_official 107:414e9c822e99 119 cfg->tracktim = 2;
mbed_official 107:414e9c822e99 120 cfg->transfer = 2;
mbed_official 107:414e9c822e99 121 cfg->useq = false;
mbed_official 107:414e9c822e99 122 cfg->tag = false;
mbed_official 107:414e9c822e99 123 cfg->aste = false;
mbed_official 107:414e9c822e99 124 }
mbed_official 107:414e9c822e99 125
mbed_official 107:414e9c822e99 126 /**
mbed_official 107:414e9c822e99 127 * \internal
mbed_official 107:414e9c822e99 128 * \brief Configure the ADC Module.
mbed_official 107:414e9c822e99 129 *
mbed_official 107:414e9c822e99 130 * \param adc Base address of the ADC
mbed_official 107:414e9c822e99 131 * \param config Configuration for the ADC
mbed_official 107:414e9c822e99 132 */
mbed_official 107:414e9c822e99 133 static void adc_set_config(Adc *const adc, struct adc_config *config)
mbed_official 107:414e9c822e99 134 {
mbed_official 107:414e9c822e99 135 uint32_t reg = 0;
mbed_official 107:414e9c822e99 136
mbed_official 107:414e9c822e99 137 reg = (config->useq ? ADC_MR_USEQ_REG_ORDER : 0) |
mbed_official 107:414e9c822e99 138 ADC_MR_PRESCAL(config->mck /
mbed_official 107:414e9c822e99 139 (2 * config->adc_clock) - 1) |
mbed_official 107:414e9c822e99 140 ADC_MR_TRACKTIM(config->tracktim) |
mbed_official 107:414e9c822e99 141 ADC_MR_TRANSFER(config->transfer) |
mbed_official 107:414e9c822e99 142 (config->startup_time);
mbed_official 107:414e9c822e99 143
mbed_official 107:414e9c822e99 144 adc->ADC_MR = reg;
mbed_official 107:414e9c822e99 145
mbed_official 107:414e9c822e99 146 adc->ADC_EMR = (config->tag ? ADC_EMR_TAG : 0) |
mbed_official 107:414e9c822e99 147 (config->aste ? ADC_EMR_ASTE_SINGLE_TRIG_AVERAGE : 0);
mbed_official 107:414e9c822e99 148
mbed_official 107:414e9c822e99 149 adc_set_resolution(adc, config->resolution);
mbed_official 107:414e9c822e99 150 }
mbed_official 107:414e9c822e99 151
mbed_official 107:414e9c822e99 152 #ifdef TEMP_SENSOR
mbed_official 107:414e9c822e99 153 /**
mbed_official 107:414e9c822e99 154 * \brief Get the ADC Temperature Sensor default configurations.
mbed_official 107:414e9c822e99 155 *
mbed_official 107:414e9c822e99 156 * Use to initialize the configuration structure to known default values.
mbed_official 107:414e9c822e99 157 *
mbed_official 107:414e9c822e99 158 * The default configuration is as follows:
mbed_official 107:414e9c822e99 159 * - Generates an event when the converted data is in the comparison window
mbed_official 107:414e9c822e99 160 * - The window range is 0xFF ~ 0xFFF
mbed_official 107:414e9c822e99 161 *
mbed_official 107:414e9c822e99 162 * \param cfg Pointer to temperature sensor configuration structure
mbed_official 107:414e9c822e99 163 * to be initiated.
mbed_official 107:414e9c822e99 164 */
mbed_official 107:414e9c822e99 165 void adc_temp_sensor_get_config_defaults(
mbed_official 107:414e9c822e99 166 struct adc_temp_sensor_config *const cfg)
mbed_official 107:414e9c822e99 167 {
mbed_official 107:414e9c822e99 168 /*Sanity check argument. */
mbed_official 107:414e9c822e99 169 Assert(cfg);
mbed_official 107:414e9c822e99 170
mbed_official 107:414e9c822e99 171 cfg->tempon = true;
mbed_official 107:414e9c822e99 172 cfg->mode = ADC_TEMP_CMP_MODE_2;
mbed_official 107:414e9c822e99 173 cfg->low_threshold = 0xFF;
mbed_official 107:414e9c822e99 174 cfg->high_threshold = 0xFFF;
mbed_official 107:414e9c822e99 175 }
mbed_official 107:414e9c822e99 176
mbed_official 107:414e9c822e99 177 /**
mbed_official 107:414e9c822e99 178 * \brief Configure the ADC temperature sensor.
mbed_official 107:414e9c822e99 179 *
mbed_official 107:414e9c822e99 180 * \param adc Base address of the ADC
mbed_official 107:414e9c822e99 181 * \param config Configuration for the ADC temperature sensor
mbed_official 107:414e9c822e99 182 */
mbed_official 107:414e9c822e99 183 void adc_temp_sensor_set_config(Adc *const adc,
mbed_official 107:414e9c822e99 184 struct adc_temp_sensor_config *config)
mbed_official 107:414e9c822e99 185 {
mbed_official 107:414e9c822e99 186 uint32_t reg = 0;
mbed_official 107:414e9c822e99 187
mbed_official 107:414e9c822e99 188 reg = ((config->tempon) ? ADC_TEMPMR_TEMPON : 0) | (config->mode);
mbed_official 107:414e9c822e99 189 adc->ADC_TEMPMR = reg;
mbed_official 107:414e9c822e99 190
mbed_official 107:414e9c822e99 191 adc->ADC_TEMPCWR = ADC_TEMPCWR_TLOWTHRES(config->low_threshold) |
mbed_official 107:414e9c822e99 192 ADC_TEMPCWR_THIGHTHRES(config->high_threshold);
mbed_official 107:414e9c822e99 193 }
mbed_official 107:414e9c822e99 194 #endif
mbed_official 107:414e9c822e99 195
mbed_official 107:414e9c822e99 196 #if (SAMG)
mbed_official 107:414e9c822e99 197 /**
mbed_official 107:414e9c822e99 198 * \brief Get the Last Channel Specific Measurement default configurations.
mbed_official 107:414e9c822e99 199 *
mbed_official 107:414e9c822e99 200 * Use to initialize the configuration structure to known default values.
mbed_official 107:414e9c822e99 201 *
mbed_official 107:414e9c822e99 202 * The default configuration is as follows:
mbed_official 107:414e9c822e99 203 * - Generates an event when the converted data is in the comparison window
mbed_official 107:414e9c822e99 204 * - The window range is 0xFF ~ 0xFFF
mbed_official 107:414e9c822e99 205 *
mbed_official 107:414e9c822e99 206 * \param cfg Pointer to last channel configuration structure
mbed_official 107:414e9c822e99 207 * to be initiated.
mbed_official 107:414e9c822e99 208 */
mbed_official 107:414e9c822e99 209 void adc_last_channel_get_config_defaults(
mbed_official 107:414e9c822e99 210 struct adc_last_channel_config *const cfg)
mbed_official 107:414e9c822e99 211 {
mbed_official 107:414e9c822e99 212 /*Sanity check argument. */
mbed_official 107:414e9c822e99 213 Assert(cfg);
mbed_official 107:414e9c822e99 214
mbed_official 107:414e9c822e99 215 cfg->dual_trig_on = true;
mbed_official 107:414e9c822e99 216 cfg->mode = ADC_LAST_CHANNEL_CMP_MODE_2;
mbed_official 107:414e9c822e99 217 cfg->low_threshold = 0xFF;
mbed_official 107:414e9c822e99 218 cfg->high_threshold = 0xFFF;
mbed_official 107:414e9c822e99 219 }
mbed_official 107:414e9c822e99 220
mbed_official 107:414e9c822e99 221 /**
mbed_official 107:414e9c822e99 222 * \brief Configure the ADC Last Channel Specific Measurement.
mbed_official 107:414e9c822e99 223 *
mbed_official 107:414e9c822e99 224 * \param adc Base address of the ADC
mbed_official 107:414e9c822e99 225 * \param config Configuration for the last channel
mbed_official 107:414e9c822e99 226 */
mbed_official 107:414e9c822e99 227 void adc_last_channel_set_config(Adc *const adc,
mbed_official 107:414e9c822e99 228 struct adc_last_channel_config *config)
mbed_official 107:414e9c822e99 229 {
mbed_official 107:414e9c822e99 230 uint32_t reg = 0;
mbed_official 107:414e9c822e99 231
mbed_official 107:414e9c822e99 232 reg = ((config->dual_trig_on) ? ADC_LCTMR_DUALTRIG : 0) | (config->mode);
mbed_official 107:414e9c822e99 233 adc->ADC_LCTMR = reg;
mbed_official 107:414e9c822e99 234
mbed_official 107:414e9c822e99 235 adc->ADC_LCCWR = ADC_LCCWR_LOWTHRES(config->low_threshold) |
mbed_official 107:414e9c822e99 236 ADC_LCCWR_HIGHTHRES(config->high_threshold);
mbed_official 107:414e9c822e99 237 }
mbed_official 107:414e9c822e99 238 #endif
mbed_official 107:414e9c822e99 239
mbed_official 107:414e9c822e99 240 /**
mbed_official 107:414e9c822e99 241 * \brief Initialize the ADC Module.
mbed_official 107:414e9c822e99 242 *
mbed_official 107:414e9c822e99 243 * \param adc Base address of the ADC
mbed_official 107:414e9c822e99 244 * \param config Configuration for the ADC
mbed_official 107:414e9c822e99 245 *
mbed_official 107:414e9c822e99 246 * \retval STATUS_OK Initialization is finished.
mbed_official 107:414e9c822e99 247 * \retval STATUS_ERR_BUSY Initialization failed.
mbed_official 107:414e9c822e99 248 */
mbed_official 107:414e9c822e99 249 enum status_code adc_init(Adc *const adc, struct adc_config *config)
mbed_official 107:414e9c822e99 250 {
mbed_official 107:414e9c822e99 251 Assert(adc);
mbed_official 107:414e9c822e99 252 Assert(config);
mbed_official 107:414e9c822e99 253
mbed_official 107:414e9c822e99 254 if ((adc_get_interrupt_status(adc) & ADC_ISR_DRDY) == ADC_ISR_DRDY) {
mbed_official 107:414e9c822e99 255 return STATUS_ERR_BUSY;
mbed_official 107:414e9c822e99 256 }
mbed_official 107:414e9c822e99 257
mbed_official 107:414e9c822e99 258 /* Reset and configure the ADC module */
mbed_official 107:414e9c822e99 259 adc->ADC_CR = ADC_CR_SWRST;
mbed_official 107:414e9c822e99 260 adc_set_config(adc, config);
mbed_official 107:414e9c822e99 261
mbed_official 107:414e9c822e99 262 uint32_t i;
mbed_official 107:414e9c822e99 263 for (i = 0; i < ADC_NUM_OF_INTERRUPT_SOURCE; i++) {
mbed_official 107:414e9c822e99 264 adc_callback_pointer[i] = 0;
mbed_official 107:414e9c822e99 265 }
mbed_official 107:414e9c822e99 266
mbed_official 107:414e9c822e99 267 return STATUS_OK;
mbed_official 107:414e9c822e99 268 }
mbed_official 107:414e9c822e99 269
mbed_official 107:414e9c822e99 270 /**
mbed_official 107:414e9c822e99 271 * \brief Configure conversion resolution.
mbed_official 107:414e9c822e99 272 *
mbed_official 107:414e9c822e99 273 * \param adc Base address of the ADC.
mbed_official 107:414e9c822e99 274 * \param res Conversion resolution.
mbed_official 107:414e9c822e99 275 *
mbed_official 107:414e9c822e99 276 */
mbed_official 107:414e9c822e99 277 void adc_set_resolution(Adc *const adc,
mbed_official 107:414e9c822e99 278 const enum adc_resolution res)
mbed_official 107:414e9c822e99 279 {
mbed_official 107:414e9c822e99 280 #if SAMG55
mbed_official 107:414e9c822e99 281 adc->ADC_EMR |= res;
mbed_official 107:414e9c822e99 282 #else
mbed_official 107:414e9c822e99 283 if (res == ADC_11_BITS || res == ADC_12_BITS) {
mbed_official 107:414e9c822e99 284 adc->ADC_MR &= ~ADC_MR_LOWRES;
mbed_official 107:414e9c822e99 285 adc->ADC_EMR |= res;
mbed_official 107:414e9c822e99 286 } else {
mbed_official 107:414e9c822e99 287 adc->ADC_MR |= res;
mbed_official 107:414e9c822e99 288 adc->ADC_EMR &= ~ADC_EMR_OSR_Msk;
mbed_official 107:414e9c822e99 289 }
mbed_official 107:414e9c822e99 290 #endif
mbed_official 107:414e9c822e99 291 }
mbed_official 107:414e9c822e99 292
mbed_official 107:414e9c822e99 293 /**
mbed_official 107:414e9c822e99 294 * \brief Configure comparison mode.
mbed_official 107:414e9c822e99 295 *
mbed_official 107:414e9c822e99 296 * \param adc Base address of the ADC.
mbed_official 107:414e9c822e99 297 * \param mode Comparison mode.
mbed_official 107:414e9c822e99 298 * \param channel Comparison Selected Channel.
mbed_official 107:414e9c822e99 299 * \param cmp_filter Compare Event Filtering.
mbed_official 107:414e9c822e99 300 */
mbed_official 107:414e9c822e99 301 void adc_set_comparison_mode(Adc *const adc,
mbed_official 107:414e9c822e99 302 const enum adc_cmp_mode mode,
mbed_official 107:414e9c822e99 303 const enum adc_channel_num channel, uint8_t cmp_filter)
mbed_official 107:414e9c822e99 304 {
mbed_official 107:414e9c822e99 305 if (channel != ADC_CHANNEL_ALL) {
mbed_official 107:414e9c822e99 306 adc_ch_sanity_check(adc, channel);
mbed_official 107:414e9c822e99 307 }
mbed_official 107:414e9c822e99 308
mbed_official 107:414e9c822e99 309 uint32_t reg;
mbed_official 107:414e9c822e99 310
mbed_official 107:414e9c822e99 311 reg = adc->ADC_EMR;
mbed_official 107:414e9c822e99 312
mbed_official 107:414e9c822e99 313 reg &= ~(ADC_EMR_CMPSEL_Msk |
mbed_official 107:414e9c822e99 314 ADC_EMR_CMPMODE_Msk |
mbed_official 107:414e9c822e99 315 ADC_EMR_CMPFILTER_Msk);
mbed_official 107:414e9c822e99 316 reg |= mode |
mbed_official 107:414e9c822e99 317 ((channel == ADC_CHANNEL_ALL) ? ADC_EMR_CMPALL
mbed_official 107:414e9c822e99 318 : ADC_EMR_CMPSEL(channel)) |
mbed_official 107:414e9c822e99 319 ADC_EMR_CMPFILTER(cmp_filter);
mbed_official 107:414e9c822e99 320
mbed_official 107:414e9c822e99 321 adc->ADC_EMR = reg;
mbed_official 107:414e9c822e99 322 }
mbed_official 107:414e9c822e99 323
mbed_official 107:414e9c822e99 324 /**
mbed_official 107:414e9c822e99 325 * \brief Configure ADC power mode.
mbed_official 107:414e9c822e99 326 *
mbed_official 107:414e9c822e99 327 * \param adc Base address of the ADC.
mbed_official 107:414e9c822e99 328 * \param mode ADC power mode value.
mbed_official 107:414e9c822e99 329 */
mbed_official 107:414e9c822e99 330 void adc_set_power_mode(Adc *const adc,
mbed_official 107:414e9c822e99 331 const enum adc_power_mode mode)
mbed_official 107:414e9c822e99 332 {
mbed_official 107:414e9c822e99 333 uint32_t reg;
mbed_official 107:414e9c822e99 334
mbed_official 107:414e9c822e99 335 reg = adc->ADC_MR;
mbed_official 107:414e9c822e99 336
mbed_official 107:414e9c822e99 337 switch (mode) {
mbed_official 107:414e9c822e99 338 case ADC_POWER_MODE_0:
mbed_official 107:414e9c822e99 339 reg |= ADC_MR_SLEEP_NORMAL;
mbed_official 107:414e9c822e99 340 break;
mbed_official 107:414e9c822e99 341
mbed_official 107:414e9c822e99 342 case ADC_POWER_MODE_1:
mbed_official 107:414e9c822e99 343 reg |= ADC_MR_SLEEP_SLEEP;
mbed_official 107:414e9c822e99 344 break;
mbed_official 107:414e9c822e99 345 }
mbed_official 107:414e9c822e99 346
mbed_official 107:414e9c822e99 347 adc->ADC_MR = reg;
mbed_official 107:414e9c822e99 348 }
mbed_official 107:414e9c822e99 349
mbed_official 107:414e9c822e99 350 /**
mbed_official 107:414e9c822e99 351 * \brief Set callback for ADC
mbed_official 107:414e9c822e99 352 *
mbed_official 107:414e9c822e99 353 * \param adc Base address of the ADC
mbed_official 107:414e9c822e99 354 * \param source Interrupt source
mbed_official 107:414e9c822e99 355 * \param callback Callback function pointer
mbed_official 107:414e9c822e99 356 * \param irq_level Interrupt level
mbed_official 107:414e9c822e99 357 */
mbed_official 107:414e9c822e99 358 void adc_set_callback(Adc *const adc, enum adc_interrupt_source source,
mbed_official 107:414e9c822e99 359 adc_callback_t callback, uint8_t irq_level)
mbed_official 107:414e9c822e99 360 {
mbed_official 107:414e9c822e99 361 Assert(adc);
mbed_official 107:414e9c822e99 362 Assert(callback);
mbed_official 107:414e9c822e99 363
mbed_official 107:414e9c822e99 364 adc_callback_pointer[source] = callback;
mbed_official 107:414e9c822e99 365 irq_register_handler(ADC_IRQn, irq_level);
mbed_official 107:414e9c822e99 366
mbed_official 107:414e9c822e99 367 /* Enable the specified interrupt source */
mbed_official 107:414e9c822e99 368 adc_enable_interrupt(adc, source);
mbed_official 107:414e9c822e99 369 }
mbed_official 107:414e9c822e99 370
mbed_official 107:414e9c822e99 371 /**
mbed_official 107:414e9c822e99 372 * \brief Enable ADC interrupts.
mbed_official 107:414e9c822e99 373 *
mbed_official 107:414e9c822e99 374 * \param adc Base address of the ADC.
mbed_official 107:414e9c822e99 375 * \param interrupt_source Interrupts to be enabled.
mbed_official 107:414e9c822e99 376 */
mbed_official 107:414e9c822e99 377 void adc_enable_interrupt(Adc *const adc,
mbed_official 107:414e9c822e99 378 enum adc_interrupt_source interrupt_source)
mbed_official 107:414e9c822e99 379 {
mbed_official 107:414e9c822e99 380 if (interrupt_source == ADC_INTERRUPT_ALL) {
mbed_official 107:414e9c822e99 381 adc->ADC_IER = ADC_INTERRUPT_ALL;
mbed_official 107:414e9c822e99 382 return;
mbed_official 107:414e9c822e99 383 } else {
mbed_official 107:414e9c822e99 384 adc->ADC_IER = adc_interrupt_mask[interrupt_source];
mbed_official 107:414e9c822e99 385 }
mbed_official 107:414e9c822e99 386 }
mbed_official 107:414e9c822e99 387
mbed_official 107:414e9c822e99 388 /**
mbed_official 107:414e9c822e99 389 * \brief Disable ADC interrupts.
mbed_official 107:414e9c822e99 390 *
mbed_official 107:414e9c822e99 391 * \param adc Base address of the ADC.
mbed_official 107:414e9c822e99 392 * \param interrupt_source Interrupts to be disabled.
mbed_official 107:414e9c822e99 393 */
mbed_official 107:414e9c822e99 394 void adc_disable_interrupt(Adc *const adc,
mbed_official 107:414e9c822e99 395 enum adc_interrupt_source interrupt_source)
mbed_official 107:414e9c822e99 396 {
mbed_official 107:414e9c822e99 397 if (interrupt_source == ADC_INTERRUPT_ALL) {
mbed_official 107:414e9c822e99 398 adc->ADC_IDR = ADC_INTERRUPT_ALL;
mbed_official 107:414e9c822e99 399 return;
mbed_official 107:414e9c822e99 400 } else {
mbed_official 107:414e9c822e99 401 adc->ADC_IDR = adc_interrupt_mask[interrupt_source];
mbed_official 107:414e9c822e99 402 }
mbed_official 107:414e9c822e99 403 }
mbed_official 107:414e9c822e99 404
mbed_official 107:414e9c822e99 405 /**
mbed_official 107:414e9c822e99 406 * \internal
mbed_official 107:414e9c822e99 407 * \brief Common ADC interrupt handler
mbed_official 107:414e9c822e99 408 *
mbed_official 107:414e9c822e99 409 * The optional callback used by the interrupt handler is set by the
mbed_official 107:414e9c822e99 410 * adc_set_callback() function.
mbed_official 107:414e9c822e99 411 *
mbed_official 107:414e9c822e99 412 * \param inst_num ADC instance number to handle interrupt for
mbed_official 107:414e9c822e99 413 * \param source Interrupt source number
mbed_official 107:414e9c822e99 414 */
mbed_official 107:414e9c822e99 415 static void adc_interrupt(enum adc_interrupt_source source)
mbed_official 107:414e9c822e99 416 {
mbed_official 107:414e9c822e99 417 if (adc_callback_pointer[source]) {
mbed_official 107:414e9c822e99 418 adc_callback_pointer[source]();
mbed_official 107:414e9c822e99 419 }
mbed_official 107:414e9c822e99 420 }
mbed_official 107:414e9c822e99 421
mbed_official 107:414e9c822e99 422 /**
mbed_official 107:414e9c822e99 423 * \internal
mbed_official 107:414e9c822e99 424 * \brief Call the callback function if the corresponding interrupt is asserted
mbed_official 107:414e9c822e99 425 *
mbed_official 107:414e9c822e99 426 * \param adc Base address of the ADC.
mbed_official 107:414e9c822e99 427 */
mbed_official 107:414e9c822e99 428 static void adc_process_callback(Adc *const adc)
mbed_official 107:414e9c822e99 429 {
mbed_official 107:414e9c822e99 430 volatile uint32_t status;
mbed_official 107:414e9c822e99 431 uint32_t cnt;
mbed_official 107:414e9c822e99 432
mbed_official 107:414e9c822e99 433 status = adc_get_interrupt_status(adc);
mbed_official 107:414e9c822e99 434
mbed_official 107:414e9c822e99 435 for (cnt = 0; cnt < ADC_NUM_OF_INTERRUPT_SOURCE; cnt++) {
mbed_official 107:414e9c822e99 436 if (status & adc_interrupt_mask[cnt]) {
mbed_official 107:414e9c822e99 437 adc_interrupt((enum adc_interrupt_source)cnt);
mbed_official 107:414e9c822e99 438 }
mbed_official 107:414e9c822e99 439 }
mbed_official 107:414e9c822e99 440 }
mbed_official 107:414e9c822e99 441
mbed_official 107:414e9c822e99 442 /**
mbed_official 107:414e9c822e99 443 * \brief Interrupt handler for ADC.
mbed_official 107:414e9c822e99 444 */
mbed_official 107:414e9c822e99 445 void ADC_Handler(void)
mbed_official 107:414e9c822e99 446 {
mbed_official 107:414e9c822e99 447 adc_process_callback(ADC);
mbed_official 107:414e9c822e99 448 }
mbed_official 107:414e9c822e99 449
mbed_official 107:414e9c822e99 450 /**
mbed_official 107:414e9c822e99 451 * \brief Enable ADC Module.
mbed_official 107:414e9c822e99 452 *
mbed_official 107:414e9c822e99 453 */
mbed_official 107:414e9c822e99 454 void adc_enable(void)
mbed_official 107:414e9c822e99 455 {
mbed_official 107:414e9c822e99 456 /* Enable peripheral clock. */
mbed_official 107:414e9c822e99 457 pmc_enable_periph_clk(ID_ADC);
mbed_official 107:414e9c822e99 458 sleepmgr_lock_mode(SLEEP_MODE_ADC);
mbed_official 107:414e9c822e99 459 }
mbed_official 107:414e9c822e99 460
mbed_official 107:414e9c822e99 461 /**
mbed_official 107:414e9c822e99 462 * \brief Disable ADC Module.
mbed_official 107:414e9c822e99 463 *
mbed_official 107:414e9c822e99 464 */
mbed_official 107:414e9c822e99 465 void adc_disable(void)
mbed_official 107:414e9c822e99 466 {
mbed_official 107:414e9c822e99 467 /* Disable peripheral clock. */
mbed_official 107:414e9c822e99 468 pmc_disable_periph_clk(ID_ADC);
mbed_official 107:414e9c822e99 469 sleepmgr_unlock_mode(SLEEP_MODE_ADC);
mbed_official 107:414e9c822e99 470 }
mbed_official 107:414e9c822e99 471
mbed_official 107:414e9c822e99 472 /**
mbed_official 107:414e9c822e99 473 * \brief Configure conversion sequence.
mbed_official 107:414e9c822e99 474 *
mbed_official 107:414e9c822e99 475 * \param adc Base address of the ADC.
mbed_official 107:414e9c822e99 476 * \param ch_list Channel sequence list.
mbed_official 107:414e9c822e99 477 * \param uc_num Number of channels in the list.
mbed_official 107:414e9c822e99 478 */
mbed_official 107:414e9c822e99 479 void adc_configure_sequence(Adc *const adc,
mbed_official 107:414e9c822e99 480 const enum adc_channel_num ch_list[], uint8_t uc_num)
mbed_official 107:414e9c822e99 481 {
mbed_official 107:414e9c822e99 482 uint8_t uc_counter;
mbed_official 107:414e9c822e99 483
mbed_official 107:414e9c822e99 484 /* Set user sequence mode */
mbed_official 107:414e9c822e99 485 adc->ADC_MR |= ADC_MR_USEQ_REG_ORDER;
mbed_official 107:414e9c822e99 486 #if (SAM4N)
mbed_official 107:414e9c822e99 487 adc->ADC_SEQR1 = 0;
mbed_official 107:414e9c822e99 488 adc->ADC_SEQR2 = 0;
mbed_official 107:414e9c822e99 489 #endif
mbed_official 107:414e9c822e99 490 #if (SAMG)
mbed_official 107:414e9c822e99 491 adc->ADC_SEQR1 = 0;
mbed_official 107:414e9c822e99 492 #endif
mbed_official 107:414e9c822e99 493
mbed_official 107:414e9c822e99 494 if (uc_num <= ADC_SEQ1_CHANNEL_NUM) {
mbed_official 107:414e9c822e99 495 for (uc_counter = 0; uc_counter < uc_num; uc_counter++) {
mbed_official 107:414e9c822e99 496 #if (SAM4N || SAMG)
mbed_official 107:414e9c822e99 497 adc->ADC_SEQR1
mbed_official 107:414e9c822e99 498 #endif
mbed_official 107:414e9c822e99 499 |= ch_list[uc_counter] << (4 * uc_counter);
mbed_official 107:414e9c822e99 500 }
mbed_official 107:414e9c822e99 501 } else {
mbed_official 107:414e9c822e99 502 for (uc_counter = 0; uc_counter <= ADC_SEQ1_CHANNEL_NUM;
mbed_official 107:414e9c822e99 503 uc_counter++) {
mbed_official 107:414e9c822e99 504 #if (SAM4N || SAMG)
mbed_official 107:414e9c822e99 505 adc->ADC_SEQR1
mbed_official 107:414e9c822e99 506 #endif
mbed_official 107:414e9c822e99 507 |= ch_list[uc_counter] << (4 * uc_counter);
mbed_official 107:414e9c822e99 508 }
mbed_official 107:414e9c822e99 509 for (uc_counter = 0; uc_counter < uc_num - ADC_SEQ1_CHANNEL_NUM;
mbed_official 107:414e9c822e99 510 uc_counter++) {
mbed_official 107:414e9c822e99 511 #if (SAM4N)
mbed_official 107:414e9c822e99 512 adc->ADC_SEQR2 |= ch_list[8 + uc_counter] << (4 * uc_counter);
mbed_official 107:414e9c822e99 513 #endif
mbed_official 107:414e9c822e99 514 }
mbed_official 107:414e9c822e99 515 }
mbed_official 107:414e9c822e99 516 }
mbed_official 107:414e9c822e99 517
mbed_official 107:414e9c822e99 518 //@}