Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Atmel/TARGET_SAM_CortexM4/drivers/adc/adc2.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
107:414e9c822e99 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

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 //@}