Sergey Solodunov
mbed library sources. Supersedes mbed-src.
Fork of
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by 
mbed official
targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/drivers/dac/TARGET_SAML21/dac.c@144:423e1876dc07, 2016-08-02 (annotated)
- Committer:
- screamer
- Date:
- Tue Aug 02 14:07:36 2016 +0000
- Revision:
- 144:423e1876dc07
- Parent:
- 18:da299f395b9e
Added targets.json file for the supported targets in the release
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 18:da299f395b9e | 1 | /** |
| mbed_official | 18:da299f395b9e | 2 | * \file |
| mbed_official | 18:da299f395b9e | 3 | * |
| mbed_official | 18:da299f395b9e | 4 | * \brief SAM Peripheral Digital-to-Analog Converter Driver |
| mbed_official | 18:da299f395b9e | 5 | * |
| mbed_official | 18:da299f395b9e | 6 | * Copyright (C) 2014-2015 Atmel Corporation. All rights reserved. |
| mbed_official | 18:da299f395b9e | 7 | * |
| mbed_official | 18:da299f395b9e | 8 | * \asf_license_start |
| mbed_official | 18:da299f395b9e | 9 | * |
| mbed_official | 18:da299f395b9e | 10 | * \page License |
| mbed_official | 18:da299f395b9e | 11 | * |
| mbed_official | 18:da299f395b9e | 12 | * Redistribution and use in source and binary forms, with or without |
| mbed_official | 18:da299f395b9e | 13 | * modification, are permitted provided that the following conditions are met: |
| mbed_official | 18:da299f395b9e | 14 | * |
| mbed_official | 18:da299f395b9e | 15 | * 1. Redistributions of source code must retain the above copyright notice, |
| mbed_official | 18:da299f395b9e | 16 | * this list of conditions and the following disclaimer. |
| mbed_official | 18:da299f395b9e | 17 | * |
| mbed_official | 18:da299f395b9e | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| mbed_official | 18:da299f395b9e | 19 | * this list of conditions and the following disclaimer in the documentation |
| mbed_official | 18:da299f395b9e | 20 | * and/or other materials provided with the distribution. |
| mbed_official | 18:da299f395b9e | 21 | * |
| mbed_official | 18:da299f395b9e | 22 | * 3. The name of Atmel may not be used to endorse or promote products derived |
| mbed_official | 18:da299f395b9e | 23 | * from this software without specific prior written permission. |
| mbed_official | 18:da299f395b9e | 24 | * |
| mbed_official | 18:da299f395b9e | 25 | * 4. This software may only be redistributed and used in connection with an |
| mbed_official | 18:da299f395b9e | 26 | * Atmel microcontroller product. |
| mbed_official | 18:da299f395b9e | 27 | * |
| mbed_official | 18:da299f395b9e | 28 | * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED |
| mbed_official | 18:da299f395b9e | 29 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| mbed_official | 18:da299f395b9e | 30 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| mbed_official | 18:da299f395b9e | 31 | * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR |
| mbed_official | 18:da299f395b9e | 32 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| mbed_official | 18:da299f395b9e | 33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| mbed_official | 18:da299f395b9e | 34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| mbed_official | 18:da299f395b9e | 35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| mbed_official | 18:da299f395b9e | 36 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| mbed_official | 18:da299f395b9e | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| mbed_official | 18:da299f395b9e | 38 | * POSSIBILITY OF SUCH DAMAGE. |
| mbed_official | 18:da299f395b9e | 39 | * |
| mbed_official | 18:da299f395b9e | 40 | * \asf_license_stop |
| mbed_official | 18:da299f395b9e | 41 | * |
| mbed_official | 18:da299f395b9e | 42 | */ |
| mbed_official | 18:da299f395b9e | 43 | /* |
| mbed_official | 18:da299f395b9e | 44 | * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> |
| mbed_official | 18:da299f395b9e | 45 | */ |
| mbed_official | 18:da299f395b9e | 46 | #include "dac.h" |
| mbed_official | 18:da299f395b9e | 47 | #include <system.h> |
| mbed_official | 18:da299f395b9e | 48 | #include <pinmux.h> |
| mbed_official | 18:da299f395b9e | 49 | |
| mbed_official | 18:da299f395b9e | 50 | /** |
| mbed_official | 18:da299f395b9e | 51 | * \internal Writes a DAC configuration to the hardware module. |
| mbed_official | 18:da299f395b9e | 52 | * |
| mbed_official | 18:da299f395b9e | 53 | * Writes out a given configuration to the hardware module. |
| mbed_official | 18:da299f395b9e | 54 | * |
| mbed_official | 18:da299f395b9e | 55 | * \param[out] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 56 | * \param[in] config Pointer to the configuration struct |
| mbed_official | 18:da299f395b9e | 57 | * |
| mbed_official | 18:da299f395b9e | 58 | */ |
| mbed_official | 18:da299f395b9e | 59 | static void _dac_set_config( |
| mbed_official | 18:da299f395b9e | 60 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 61 | struct dac_config *const config) |
| mbed_official | 18:da299f395b9e | 62 | { |
| mbed_official | 18:da299f395b9e | 63 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 64 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 65 | Assert(config); |
| mbed_official | 18:da299f395b9e | 66 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 67 | |
| mbed_official | 18:da299f395b9e | 68 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 69 | |
| mbed_official | 18:da299f395b9e | 70 | /* Set selected DAC start on event to be disable when enabling the module */ |
| mbed_official | 18:da299f395b9e | 71 | module_inst->start_on_event[DAC_CHANNEL_0] = false; |
| mbed_official | 18:da299f395b9e | 72 | module_inst->start_on_event[DAC_CHANNEL_1] = false; |
| mbed_official | 18:da299f395b9e | 73 | |
| mbed_official | 18:da299f395b9e | 74 | uint32_t new_ctrlb = 0; |
| mbed_official | 18:da299f395b9e | 75 | |
| mbed_official | 18:da299f395b9e | 76 | /* Enable DAC in differential mode if configured */ |
| mbed_official | 18:da299f395b9e | 77 | if (config->differential_mode) { |
| mbed_official | 18:da299f395b9e | 78 | new_ctrlb |= DAC_CTRLB_DIFF; |
| mbed_official | 18:da299f395b9e | 79 | } |
| mbed_official | 18:da299f395b9e | 80 | |
| mbed_official | 18:da299f395b9e | 81 | /* Set reference voltage */ |
| mbed_official | 18:da299f395b9e | 82 | new_ctrlb |= config->reference; |
| mbed_official | 18:da299f395b9e | 83 | |
| mbed_official | 18:da299f395b9e | 84 | /* Apply the new configuration to the hardware module */ |
| mbed_official | 18:da299f395b9e | 85 | dac_module->CTRLB.reg = new_ctrlb; |
| mbed_official | 18:da299f395b9e | 86 | } |
| mbed_official | 18:da299f395b9e | 87 | |
| mbed_official | 18:da299f395b9e | 88 | /** |
| mbed_official | 18:da299f395b9e | 89 | * \brief Determines if the hardware module(s) are currently synchronizing to the bus. |
| mbed_official | 18:da299f395b9e | 90 | * |
| mbed_official | 18:da299f395b9e | 91 | * Checks to see if the underlying hardware peripheral module(s) are currently |
| mbed_official | 18:da299f395b9e | 92 | * synchronizing across multiple clock domains to the hardware bus. This |
| mbed_official | 18:da299f395b9e | 93 | * function can be used to delay further operations on a module until such time |
| mbed_official | 18:da299f395b9e | 94 | * that it is ready, to prevent blocking delays for synchronization in the |
| mbed_official | 18:da299f395b9e | 95 | * user application. |
| mbed_official | 18:da299f395b9e | 96 | * |
| mbed_official | 18:da299f395b9e | 97 | * \param[in] dev_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 98 | * |
| mbed_official | 18:da299f395b9e | 99 | * \return Synchronization status of the underlying hardware module(s). |
| mbed_official | 18:da299f395b9e | 100 | * |
| mbed_official | 18:da299f395b9e | 101 | * \retval true If the module synchronization is ongoing |
| mbed_official | 18:da299f395b9e | 102 | * \retval false If the module has completed synchronization |
| mbed_official | 18:da299f395b9e | 103 | */ |
| mbed_official | 18:da299f395b9e | 104 | bool dac_is_syncing( |
| mbed_official | 18:da299f395b9e | 105 | struct dac_module *const dev_inst) |
| mbed_official | 18:da299f395b9e | 106 | { |
| mbed_official | 18:da299f395b9e | 107 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 108 | Assert(dev_inst); |
| mbed_official | 18:da299f395b9e | 109 | |
| mbed_official | 18:da299f395b9e | 110 | Dac *const dac_module = dev_inst->hw; |
| mbed_official | 18:da299f395b9e | 111 | |
| mbed_official | 18:da299f395b9e | 112 | if (dac_module->SYNCBUSY.reg) { |
| mbed_official | 18:da299f395b9e | 113 | return true; |
| mbed_official | 18:da299f395b9e | 114 | } |
| mbed_official | 18:da299f395b9e | 115 | |
| mbed_official | 18:da299f395b9e | 116 | return false; |
| mbed_official | 18:da299f395b9e | 117 | } |
| mbed_official | 18:da299f395b9e | 118 | |
| mbed_official | 18:da299f395b9e | 119 | /** |
| mbed_official | 18:da299f395b9e | 120 | * \brief Initializes a DAC configuration structure to defaults. |
| mbed_official | 18:da299f395b9e | 121 | * |
| mbed_official | 18:da299f395b9e | 122 | * Initializes a given DAC configuration structure to a set of |
| mbed_official | 18:da299f395b9e | 123 | * known default values. This function should be called on any new |
| mbed_official | 18:da299f395b9e | 124 | * instance of the configuration structures before being modified by the |
| mbed_official | 18:da299f395b9e | 125 | * user application. |
| mbed_official | 18:da299f395b9e | 126 | * |
| mbed_official | 18:da299f395b9e | 127 | * The default configuration is as follows: |
| mbed_official | 18:da299f395b9e | 128 | * \li 1V from internal bandgap reference |
| mbed_official | 18:da299f395b9e | 129 | * \li Drive the DAC output to the VOUT pin |
| mbed_official | 18:da299f395b9e | 130 | * \li Right adjust data |
| mbed_official | 18:da299f395b9e | 131 | * \li GCLK generator 0 (GCLK main) clock source |
| mbed_official | 18:da299f395b9e | 132 | * \li The output buffer is disabled when the chip enters STANDBY sleep |
| mbed_official | 18:da299f395b9e | 133 | * mode |
| mbed_official | 18:da299f395b9e | 134 | * |
| mbed_official | 18:da299f395b9e | 135 | * \param[out] config Configuration structure to initialize to default values |
| mbed_official | 18:da299f395b9e | 136 | */ |
| mbed_official | 18:da299f395b9e | 137 | void dac_get_config_defaults( |
| mbed_official | 18:da299f395b9e | 138 | struct dac_config *const config) |
| mbed_official | 18:da299f395b9e | 139 | { |
| mbed_official | 18:da299f395b9e | 140 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 141 | Assert(config); |
| mbed_official | 18:da299f395b9e | 142 | |
| mbed_official | 18:da299f395b9e | 143 | /* Default configuration values */ |
| mbed_official | 18:da299f395b9e | 144 | config->differential_mode = false; |
| mbed_official | 18:da299f395b9e | 145 | config->reference = DAC_REFERENCE_INTREF; |
| mbed_official | 18:da299f395b9e | 146 | config->clock_source = GCLK_GENERATOR_0; |
| mbed_official | 18:da299f395b9e | 147 | } |
| mbed_official | 18:da299f395b9e | 148 | |
| mbed_official | 18:da299f395b9e | 149 | /** |
| mbed_official | 18:da299f395b9e | 150 | * \brief Initialize the DAC device struct. |
| mbed_official | 18:da299f395b9e | 151 | * |
| mbed_official | 18:da299f395b9e | 152 | * Use this function to initialize the Digital to Analog Converter. Resets the |
| mbed_official | 18:da299f395b9e | 153 | * underlying hardware module and configures it. |
| mbed_official | 18:da299f395b9e | 154 | * |
| mbed_official | 18:da299f395b9e | 155 | * \note The DAC channel must be configured separately. |
| mbed_official | 18:da299f395b9e | 156 | * |
| mbed_official | 18:da299f395b9e | 157 | * \param[out] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 158 | * \param[in] module Pointer to the DAC module instance |
| mbed_official | 18:da299f395b9e | 159 | * \param[in] config Pointer to the config struct, created by the user |
| mbed_official | 18:da299f395b9e | 160 | * application |
| mbed_official | 18:da299f395b9e | 161 | * |
| mbed_official | 18:da299f395b9e | 162 | * \return Status of initialization. |
| mbed_official | 18:da299f395b9e | 163 | * \retval STATUS_OK Module initiated correctly |
| mbed_official | 18:da299f395b9e | 164 | * \retval STATUS_ERR_DENIED If module is enabled |
| mbed_official | 18:da299f395b9e | 165 | * \retval STATUS_BUSY If module is busy resetting |
| mbed_official | 18:da299f395b9e | 166 | */ |
| mbed_official | 18:da299f395b9e | 167 | enum status_code dac_init( |
| mbed_official | 18:da299f395b9e | 168 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 169 | Dac *const module, |
| mbed_official | 18:da299f395b9e | 170 | struct dac_config *const config) |
| mbed_official | 18:da299f395b9e | 171 | { |
| mbed_official | 18:da299f395b9e | 172 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 173 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 174 | Assert(module); |
| mbed_official | 18:da299f395b9e | 175 | Assert(config); |
| mbed_official | 18:da299f395b9e | 176 | |
| mbed_official | 18:da299f395b9e | 177 | /* Initialize device instance */ |
| mbed_official | 18:da299f395b9e | 178 | module_inst->hw = module; |
| mbed_official | 18:da299f395b9e | 179 | |
| mbed_official | 18:da299f395b9e | 180 | /* Turn on the digital interface clock */ |
| mbed_official | 18:da299f395b9e | 181 | system_apb_clock_set_mask(SYSTEM_CLOCK_APB_APBC, MCLK_APBCMASK_DAC); |
| mbed_official | 18:da299f395b9e | 182 | |
| mbed_official | 18:da299f395b9e | 183 | /* Check if module is enabled. */ |
| mbed_official | 18:da299f395b9e | 184 | if (module->CTRLA.reg & DAC_CTRLA_ENABLE) { |
| mbed_official | 18:da299f395b9e | 185 | return STATUS_ERR_DENIED; |
| mbed_official | 18:da299f395b9e | 186 | } |
| mbed_official | 18:da299f395b9e | 187 | |
| mbed_official | 18:da299f395b9e | 188 | /* Check if reset is in progress. */ |
| mbed_official | 18:da299f395b9e | 189 | if (module->CTRLA.reg & DAC_CTRLA_SWRST) { |
| mbed_official | 18:da299f395b9e | 190 | return STATUS_BUSY; |
| mbed_official | 18:da299f395b9e | 191 | } |
| mbed_official | 18:da299f395b9e | 192 | |
| mbed_official | 18:da299f395b9e | 193 | /* Configure GCLK channel and enable clock */ |
| mbed_official | 18:da299f395b9e | 194 | struct system_gclk_chan_config gclk_chan_conf; |
| mbed_official | 18:da299f395b9e | 195 | system_gclk_chan_get_config_defaults(&gclk_chan_conf); |
| mbed_official | 18:da299f395b9e | 196 | gclk_chan_conf.source_generator = config->clock_source; |
| mbed_official | 18:da299f395b9e | 197 | system_gclk_chan_set_config(DAC_GCLK_ID, &gclk_chan_conf); |
| mbed_official | 18:da299f395b9e | 198 | system_gclk_chan_enable(DAC_GCLK_ID); |
| mbed_official | 18:da299f395b9e | 199 | |
| mbed_official | 18:da299f395b9e | 200 | /* Write configuration to module */ |
| mbed_official | 18:da299f395b9e | 201 | _dac_set_config(module_inst, config); |
| mbed_official | 18:da299f395b9e | 202 | |
| mbed_official | 18:da299f395b9e | 203 | /* Store reference selection for later use */ |
| mbed_official | 18:da299f395b9e | 204 | module_inst->reference = config->reference; |
| mbed_official | 18:da299f395b9e | 205 | |
| mbed_official | 18:da299f395b9e | 206 | #if DAC_CALLBACK_MODE == true |
| mbed_official | 18:da299f395b9e | 207 | for (uint8_t i = 0; i < DAC_CHANNEL_N; i++) { |
| mbed_official | 18:da299f395b9e | 208 | for (uint8_t j = 0; j < DAC_CALLBACK_N; j++) { |
| mbed_official | 18:da299f395b9e | 209 | module_inst->callback[i][j] = NULL; |
| mbed_official | 18:da299f395b9e | 210 | } |
| mbed_official | 18:da299f395b9e | 211 | }; |
| mbed_official | 18:da299f395b9e | 212 | |
| mbed_official | 18:da299f395b9e | 213 | _dac_instances[0] = module_inst; |
| mbed_official | 18:da299f395b9e | 214 | #endif |
| mbed_official | 18:da299f395b9e | 215 | |
| mbed_official | 18:da299f395b9e | 216 | return STATUS_OK; |
| mbed_official | 18:da299f395b9e | 217 | } |
| mbed_official | 18:da299f395b9e | 218 | |
| mbed_official | 18:da299f395b9e | 219 | /** |
| mbed_official | 18:da299f395b9e | 220 | * \brief Resets the DAC module. |
| mbed_official | 18:da299f395b9e | 221 | * |
| mbed_official | 18:da299f395b9e | 222 | * This function will reset the DAC module to its power on default values and |
| mbed_official | 18:da299f395b9e | 223 | * disable it. |
| mbed_official | 18:da299f395b9e | 224 | * |
| mbed_official | 18:da299f395b9e | 225 | * \param[in] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 226 | */ |
| mbed_official | 18:da299f395b9e | 227 | void dac_reset( |
| mbed_official | 18:da299f395b9e | 228 | struct dac_module *const module_inst) |
| mbed_official | 18:da299f395b9e | 229 | { |
| mbed_official | 18:da299f395b9e | 230 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 231 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 232 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 233 | |
| mbed_official | 18:da299f395b9e | 234 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 235 | |
| mbed_official | 18:da299f395b9e | 236 | while (dac_is_syncing(module_inst)) { |
| mbed_official | 18:da299f395b9e | 237 | /* Wait until the synchronization is complete */ |
| mbed_official | 18:da299f395b9e | 238 | } |
| mbed_official | 18:da299f395b9e | 239 | |
| mbed_official | 18:da299f395b9e | 240 | /* Software reset the module */ |
| mbed_official | 18:da299f395b9e | 241 | dac_module->CTRLA.reg |= DAC_CTRLA_SWRST; |
| mbed_official | 18:da299f395b9e | 242 | } |
| mbed_official | 18:da299f395b9e | 243 | |
| mbed_official | 18:da299f395b9e | 244 | /** |
| mbed_official | 18:da299f395b9e | 245 | * \brief Enable the DAC module. |
| mbed_official | 18:da299f395b9e | 246 | * |
| mbed_official | 18:da299f395b9e | 247 | * Enables the DAC interface and the selected output. If any internal reference |
| mbed_official | 18:da299f395b9e | 248 | * is selected it will be enabled. |
| mbed_official | 18:da299f395b9e | 249 | * |
| mbed_official | 18:da299f395b9e | 250 | * \param[in] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 251 | * |
| mbed_official | 18:da299f395b9e | 252 | */ |
| mbed_official | 18:da299f395b9e | 253 | void dac_enable( |
| mbed_official | 18:da299f395b9e | 254 | struct dac_module *const module_inst) |
| mbed_official | 18:da299f395b9e | 255 | { |
| mbed_official | 18:da299f395b9e | 256 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 257 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 258 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 259 | |
| mbed_official | 18:da299f395b9e | 260 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 261 | |
| mbed_official | 18:da299f395b9e | 262 | while (dac_is_syncing(module_inst)) { |
| mbed_official | 18:da299f395b9e | 263 | /* Wait until the synchronization is complete */ |
| mbed_official | 18:da299f395b9e | 264 | } |
| mbed_official | 18:da299f395b9e | 265 | |
| mbed_official | 18:da299f395b9e | 266 | /* Enable the module */ |
| mbed_official | 18:da299f395b9e | 267 | dac_module->CTRLA.reg |= DAC_CTRLA_ENABLE; |
| mbed_official | 18:da299f395b9e | 268 | |
| mbed_official | 18:da299f395b9e | 269 | /* Enable internal bandgap reference if selected in the configuration */ |
| mbed_official | 18:da299f395b9e | 270 | if (module_inst->reference == DAC_REFERENCE_INTREF) { |
| mbed_official | 18:da299f395b9e | 271 | system_voltage_reference_enable(SYSTEM_VOLTAGE_REFERENCE_OUTPUT); |
| mbed_official | 18:da299f395b9e | 272 | } |
| mbed_official | 18:da299f395b9e | 273 | |
| mbed_official | 18:da299f395b9e | 274 | if(dac_module->DACCTRL[DAC_CHANNEL_0].reg & DAC_DACCTRL_ENABLE) { |
| mbed_official | 18:da299f395b9e | 275 | while(! (dac_module->STATUS.reg & DAC_STATUS_READY(DAC_CHANNEL_0 + 1))) { |
| mbed_official | 18:da299f395b9e | 276 | }; |
| mbed_official | 18:da299f395b9e | 277 | } else if(dac_module->DACCTRL[DAC_CHANNEL_1].reg & DAC_DACCTRL_ENABLE) { |
| mbed_official | 18:da299f395b9e | 278 | while(! (dac_module->STATUS.reg & DAC_STATUS_READY(DAC_CHANNEL_1 + 1))) { |
| mbed_official | 18:da299f395b9e | 279 | }; |
| mbed_official | 18:da299f395b9e | 280 | } |
| mbed_official | 18:da299f395b9e | 281 | } |
| mbed_official | 18:da299f395b9e | 282 | |
| mbed_official | 18:da299f395b9e | 283 | /** |
| mbed_official | 18:da299f395b9e | 284 | * \brief Disable the DAC module. |
| mbed_official | 18:da299f395b9e | 285 | * |
| mbed_official | 18:da299f395b9e | 286 | * Disables the DAC interface and the output buffer. |
| mbed_official | 18:da299f395b9e | 287 | * |
| mbed_official | 18:da299f395b9e | 288 | * \param[in] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 289 | * |
| mbed_official | 18:da299f395b9e | 290 | */ |
| mbed_official | 18:da299f395b9e | 291 | void dac_disable( |
| mbed_official | 18:da299f395b9e | 292 | struct dac_module *const module_inst) |
| mbed_official | 18:da299f395b9e | 293 | { |
| mbed_official | 18:da299f395b9e | 294 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 295 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 296 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 297 | |
| mbed_official | 18:da299f395b9e | 298 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 299 | |
| mbed_official | 18:da299f395b9e | 300 | while (dac_is_syncing(module_inst)) { |
| mbed_official | 18:da299f395b9e | 301 | /* Wait until the synchronization is complete */ |
| mbed_official | 18:da299f395b9e | 302 | } |
| mbed_official | 18:da299f395b9e | 303 | |
| mbed_official | 18:da299f395b9e | 304 | /* Disable DAC */ |
| mbed_official | 18:da299f395b9e | 305 | dac_module->CTRLA.reg &= ~DAC_CTRLA_ENABLE; |
| mbed_official | 18:da299f395b9e | 306 | } |
| mbed_official | 18:da299f395b9e | 307 | |
| mbed_official | 18:da299f395b9e | 308 | /** |
| mbed_official | 18:da299f395b9e | 309 | * \brief Enables a DAC event input or output. |
| mbed_official | 18:da299f395b9e | 310 | * |
| mbed_official | 18:da299f395b9e | 311 | * Enables one or more input or output events to or from the DAC module. See |
| mbed_official | 18:da299f395b9e | 312 | * \ref dac_events "Struct dac_events" for a list of events this module supports. |
| mbed_official | 18:da299f395b9e | 313 | * |
| mbed_official | 18:da299f395b9e | 314 | * \note Events cannot be altered while the module is enabled. |
| mbed_official | 18:da299f395b9e | 315 | * |
| mbed_official | 18:da299f395b9e | 316 | * \param[in] module_inst Software instance for the DAC peripheral |
| mbed_official | 18:da299f395b9e | 317 | * \param[in] events Struct containing flags of events to enable |
| mbed_official | 18:da299f395b9e | 318 | */ |
| mbed_official | 18:da299f395b9e | 319 | void dac_enable_events( |
| mbed_official | 18:da299f395b9e | 320 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 321 | struct dac_events *const events) |
| mbed_official | 18:da299f395b9e | 322 | { |
| mbed_official | 18:da299f395b9e | 323 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 324 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 325 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 326 | Assert(events); |
| mbed_official | 18:da299f395b9e | 327 | |
| mbed_official | 18:da299f395b9e | 328 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 329 | |
| mbed_official | 18:da299f395b9e | 330 | uint32_t event_mask = 0; |
| mbed_official | 18:da299f395b9e | 331 | |
| mbed_official | 18:da299f395b9e | 332 | /* Configure Enable Inversion of input event */ |
| mbed_official | 18:da299f395b9e | 333 | if (events->generate_event_on_chan0_falling_edge) { |
| mbed_official | 18:da299f395b9e | 334 | event_mask |= DAC_EVCTRL_INVEI0; |
| mbed_official | 18:da299f395b9e | 335 | } |
| mbed_official | 18:da299f395b9e | 336 | |
| mbed_official | 18:da299f395b9e | 337 | /* Configure Enable Inversion of input event */ |
| mbed_official | 18:da299f395b9e | 338 | if (events->generate_event_on_chan1_falling_edge) { |
| mbed_official | 18:da299f395b9e | 339 | event_mask |= DAC_EVCTRL_INVEI1; |
| mbed_official | 18:da299f395b9e | 340 | } |
| mbed_official | 18:da299f395b9e | 341 | |
| mbed_official | 18:da299f395b9e | 342 | /* Configure Buffer Empty event */ |
| mbed_official | 18:da299f395b9e | 343 | if (events->generate_event_on_chan0_buffer_empty) { |
| mbed_official | 18:da299f395b9e | 344 | event_mask |= DAC_EVCTRL_EMPTYEO0; |
| mbed_official | 18:da299f395b9e | 345 | } |
| mbed_official | 18:da299f395b9e | 346 | |
| mbed_official | 18:da299f395b9e | 347 | /* Configure Buffer Empty event */ |
| mbed_official | 18:da299f395b9e | 348 | if (events->generate_event_on_chan1_buffer_empty) { |
| mbed_official | 18:da299f395b9e | 349 | event_mask |= DAC_EVCTRL_EMPTYEO1; |
| mbed_official | 18:da299f395b9e | 350 | } |
| mbed_official | 18:da299f395b9e | 351 | |
| mbed_official | 18:da299f395b9e | 352 | /* Configure Conversion Start event */ |
| mbed_official | 18:da299f395b9e | 353 | if (events->on_event_chan0_start_conversion) { |
| mbed_official | 18:da299f395b9e | 354 | event_mask |= DAC_EVCTRL_STARTEI0; |
| mbed_official | 18:da299f395b9e | 355 | module_inst->start_on_event[DAC_CHANNEL_0] = true; |
| mbed_official | 18:da299f395b9e | 356 | } |
| mbed_official | 18:da299f395b9e | 357 | |
| mbed_official | 18:da299f395b9e | 358 | /* Configure Conversion Start event */ |
| mbed_official | 18:da299f395b9e | 359 | if (events->on_event_chan1_start_conversion) { |
| mbed_official | 18:da299f395b9e | 360 | event_mask |= DAC_EVCTRL_STARTEI1; |
| mbed_official | 18:da299f395b9e | 361 | module_inst->start_on_event[DAC_CHANNEL_1] = true; |
| mbed_official | 18:da299f395b9e | 362 | } |
| mbed_official | 18:da299f395b9e | 363 | |
| mbed_official | 18:da299f395b9e | 364 | dac_module->EVCTRL.reg |= event_mask; |
| mbed_official | 18:da299f395b9e | 365 | } |
| mbed_official | 18:da299f395b9e | 366 | |
| mbed_official | 18:da299f395b9e | 367 | /** |
| mbed_official | 18:da299f395b9e | 368 | * \brief Disables a DAC event input or output. |
| mbed_official | 18:da299f395b9e | 369 | * |
| mbed_official | 18:da299f395b9e | 370 | * Disables one or more input or output events to or from the DAC module. See |
| mbed_official | 18:da299f395b9e | 371 | * \ref dac_events "Struct dac_events" for a list of events this module supports. |
| mbed_official | 18:da299f395b9e | 372 | * |
| mbed_official | 18:da299f395b9e | 373 | * \note Events cannot be altered while the module is enabled. |
| mbed_official | 18:da299f395b9e | 374 | * |
| mbed_official | 18:da299f395b9e | 375 | * \param[in] module_inst Software instance for the DAC peripheral |
| mbed_official | 18:da299f395b9e | 376 | * \param[in] events Struct containing flags of events to disable |
| mbed_official | 18:da299f395b9e | 377 | */ |
| mbed_official | 18:da299f395b9e | 378 | void dac_disable_events( |
| mbed_official | 18:da299f395b9e | 379 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 380 | struct dac_events *const events) |
| mbed_official | 18:da299f395b9e | 381 | { |
| mbed_official | 18:da299f395b9e | 382 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 383 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 384 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 385 | Assert(events); |
| mbed_official | 18:da299f395b9e | 386 | |
| mbed_official | 18:da299f395b9e | 387 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 388 | |
| mbed_official | 18:da299f395b9e | 389 | uint32_t event_mask = 0; |
| mbed_official | 18:da299f395b9e | 390 | |
| mbed_official | 18:da299f395b9e | 391 | /* Configure Buffer Empty event */ |
| mbed_official | 18:da299f395b9e | 392 | if (events->on_event_chan0_start_conversion) { |
| mbed_official | 18:da299f395b9e | 393 | event_mask |= DAC_EVCTRL_EMPTYEO0; |
| mbed_official | 18:da299f395b9e | 394 | } |
| mbed_official | 18:da299f395b9e | 395 | |
| mbed_official | 18:da299f395b9e | 396 | /* Configure Buffer Empty event */ |
| mbed_official | 18:da299f395b9e | 397 | if (events->on_event_chan1_start_conversion) { |
| mbed_official | 18:da299f395b9e | 398 | event_mask |= DAC_EVCTRL_EMPTYEO1; |
| mbed_official | 18:da299f395b9e | 399 | } |
| mbed_official | 18:da299f395b9e | 400 | |
| mbed_official | 18:da299f395b9e | 401 | /* Configure Conversion Start event */ |
| mbed_official | 18:da299f395b9e | 402 | if (events->generate_event_on_chan0_buffer_empty) { |
| mbed_official | 18:da299f395b9e | 403 | event_mask |= DAC_EVCTRL_STARTEI0; |
| mbed_official | 18:da299f395b9e | 404 | module_inst->start_on_event[DAC_CHANNEL_0] = false; |
| mbed_official | 18:da299f395b9e | 405 | } |
| mbed_official | 18:da299f395b9e | 406 | |
| mbed_official | 18:da299f395b9e | 407 | /* Configure Conversion Start event */ |
| mbed_official | 18:da299f395b9e | 408 | if (events->generate_event_on_chan0_buffer_empty) { |
| mbed_official | 18:da299f395b9e | 409 | event_mask |= DAC_EVCTRL_STARTEI1; |
| mbed_official | 18:da299f395b9e | 410 | module_inst->start_on_event[DAC_CHANNEL_1] = false; |
| mbed_official | 18:da299f395b9e | 411 | } |
| mbed_official | 18:da299f395b9e | 412 | |
| mbed_official | 18:da299f395b9e | 413 | dac_module->EVCTRL.reg &= ~event_mask; |
| mbed_official | 18:da299f395b9e | 414 | } |
| mbed_official | 18:da299f395b9e | 415 | |
| mbed_official | 18:da299f395b9e | 416 | void dac_chan_get_config_defaults( |
| mbed_official | 18:da299f395b9e | 417 | struct dac_chan_config *const config) |
| mbed_official | 18:da299f395b9e | 418 | { |
| mbed_official | 18:da299f395b9e | 419 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 420 | Assert(config); |
| mbed_official | 18:da299f395b9e | 421 | |
| mbed_official | 18:da299f395b9e | 422 | /* Dac channel default configuration values */ |
| mbed_official | 18:da299f395b9e | 423 | config->left_adjust = false; |
| mbed_official | 18:da299f395b9e | 424 | config->current = DAC_CURRENT_12M; |
| mbed_official | 18:da299f395b9e | 425 | config->run_in_standby = false; |
| mbed_official | 18:da299f395b9e | 426 | config->dither_mode = false; |
| mbed_official | 18:da299f395b9e | 427 | config->refresh_period = 1; |
| mbed_official | 18:da299f395b9e | 428 | } |
| mbed_official | 18:da299f395b9e | 429 | |
| mbed_official | 18:da299f395b9e | 430 | |
| mbed_official | 18:da299f395b9e | 431 | /** |
| mbed_official | 18:da299f395b9e | 432 | * \brief Writes a DAC channel configuration to the hardware module. |
| mbed_official | 18:da299f395b9e | 433 | * |
| mbed_official | 18:da299f395b9e | 434 | * Writes out a given channel configuration to the hardware module. |
| mbed_official | 18:da299f395b9e | 435 | * |
| mbed_official | 18:da299f395b9e | 436 | * \note The DAC device instance structure must be initialized before calling |
| mbed_official | 18:da299f395b9e | 437 | * this function. |
| mbed_official | 18:da299f395b9e | 438 | * |
| mbed_official | 18:da299f395b9e | 439 | * \param[in] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 440 | * \param[in] channel Channel to configure |
| mbed_official | 18:da299f395b9e | 441 | * \param[in] config Pointer to the configuration struct |
| mbed_official | 18:da299f395b9e | 442 | * |
| mbed_official | 18:da299f395b9e | 443 | */ |
| mbed_official | 18:da299f395b9e | 444 | void dac_chan_set_config( |
| mbed_official | 18:da299f395b9e | 445 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 446 | const enum dac_channel channel, |
| mbed_official | 18:da299f395b9e | 447 | struct dac_chan_config *const config) |
| mbed_official | 18:da299f395b9e | 448 | { |
| mbed_official | 18:da299f395b9e | 449 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 450 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 451 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 452 | Assert(config); |
| mbed_official | 18:da299f395b9e | 453 | |
| mbed_official | 18:da299f395b9e | 454 | /* MUX the DAC VOUT pin */ |
| mbed_official | 18:da299f395b9e | 455 | struct system_pinmux_config pin_conf; |
| mbed_official | 18:da299f395b9e | 456 | system_pinmux_get_config_defaults(&pin_conf); |
| mbed_official | 18:da299f395b9e | 457 | |
| mbed_official | 18:da299f395b9e | 458 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; |
| mbed_official | 18:da299f395b9e | 459 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE; |
| mbed_official | 18:da299f395b9e | 460 | |
| mbed_official | 18:da299f395b9e | 461 | if(channel == DAC_CHANNEL_0) { |
| mbed_official | 18:da299f395b9e | 462 | /* Set up the DAC VOUT0 pin */ |
| mbed_official | 18:da299f395b9e | 463 | pin_conf.mux_position = MUX_PA02B_DAC_VOUT0; |
| mbed_official | 18:da299f395b9e | 464 | system_pinmux_pin_set_config(PIN_PA02B_DAC_VOUT0, &pin_conf); |
| mbed_official | 18:da299f395b9e | 465 | } else if(channel == DAC_CHANNEL_1) { |
| mbed_official | 18:da299f395b9e | 466 | /* Set up the DAC VOUT1 pin */ |
| mbed_official | 18:da299f395b9e | 467 | pin_conf.mux_position = MUX_PA05B_DAC_VOUT1; |
| mbed_official | 18:da299f395b9e | 468 | system_pinmux_pin_set_config(PIN_PA05B_DAC_VOUT1, &pin_conf); |
| mbed_official | 18:da299f395b9e | 469 | } |
| mbed_official | 18:da299f395b9e | 470 | |
| mbed_official | 18:da299f395b9e | 471 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 472 | |
| mbed_official | 18:da299f395b9e | 473 | uint32_t new_dacctrl = 0; |
| mbed_official | 18:da299f395b9e | 474 | |
| mbed_official | 18:da299f395b9e | 475 | /* Left adjust data if configured */ |
| mbed_official | 18:da299f395b9e | 476 | if (config->left_adjust) { |
| mbed_official | 18:da299f395b9e | 477 | new_dacctrl |= DAC_DACCTRL_LEFTADJ; |
| mbed_official | 18:da299f395b9e | 478 | } |
| mbed_official | 18:da299f395b9e | 479 | |
| mbed_official | 18:da299f395b9e | 480 | /* Set current control */ |
| mbed_official | 18:da299f395b9e | 481 | new_dacctrl |= config->current; |
| mbed_official | 18:da299f395b9e | 482 | |
| mbed_official | 18:da299f395b9e | 483 | /* Enable DAC in standby sleep mode if configured */ |
| mbed_official | 18:da299f395b9e | 484 | if (config->run_in_standby) { |
| mbed_official | 18:da299f395b9e | 485 | new_dacctrl |= DAC_DACCTRL_RUNSTDBY; |
| mbed_official | 18:da299f395b9e | 486 | } |
| mbed_official | 18:da299f395b9e | 487 | |
| mbed_official | 18:da299f395b9e | 488 | /* Voltage pump disable if configured */ |
| mbed_official | 18:da299f395b9e | 489 | if (config->dither_mode) { |
| mbed_official | 18:da299f395b9e | 490 | new_dacctrl |= DAC_DACCTRL_DITHER; |
| mbed_official | 18:da299f395b9e | 491 | } |
| mbed_official | 18:da299f395b9e | 492 | |
| mbed_official | 18:da299f395b9e | 493 | new_dacctrl |= DAC_DACCTRL_REFRESH(config->refresh_period); |
| mbed_official | 18:da299f395b9e | 494 | |
| mbed_official | 18:da299f395b9e | 495 | /* Apply the new configuration to the hardware module */ |
| mbed_official | 18:da299f395b9e | 496 | dac_module->DACCTRL[channel].reg = new_dacctrl; |
| mbed_official | 18:da299f395b9e | 497 | } |
| mbed_official | 18:da299f395b9e | 498 | |
| mbed_official | 18:da299f395b9e | 499 | /** |
| mbed_official | 18:da299f395b9e | 500 | * \brief Enable a DAC channel. |
| mbed_official | 18:da299f395b9e | 501 | * |
| mbed_official | 18:da299f395b9e | 502 | * Enables the selected DAC channel. |
| mbed_official | 18:da299f395b9e | 503 | * |
| mbed_official | 18:da299f395b9e | 504 | * \param[in] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 505 | * \param[in] channel Channel to enable |
| mbed_official | 18:da299f395b9e | 506 | * |
| mbed_official | 18:da299f395b9e | 507 | */ |
| mbed_official | 18:da299f395b9e | 508 | void dac_chan_enable( |
| mbed_official | 18:da299f395b9e | 509 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 510 | enum dac_channel channel) |
| mbed_official | 18:da299f395b9e | 511 | { |
| mbed_official | 18:da299f395b9e | 512 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 513 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 514 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 515 | |
| mbed_official | 18:da299f395b9e | 516 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 517 | |
| mbed_official | 18:da299f395b9e | 518 | /* Enable the module */ |
| mbed_official | 18:da299f395b9e | 519 | dac_module->DACCTRL[channel].reg |= DAC_DACCTRL_ENABLE; |
| mbed_official | 18:da299f395b9e | 520 | } |
| mbed_official | 18:da299f395b9e | 521 | |
| mbed_official | 18:da299f395b9e | 522 | /** |
| mbed_official | 18:da299f395b9e | 523 | * \brief Disable a DAC channel. |
| mbed_official | 18:da299f395b9e | 524 | * |
| mbed_official | 18:da299f395b9e | 525 | * Disables the selected DAC channel. |
| mbed_official | 18:da299f395b9e | 526 | * |
| mbed_official | 18:da299f395b9e | 527 | * \param[in] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 528 | * \param[in] channel Channel to disable |
| mbed_official | 18:da299f395b9e | 529 | * |
| mbed_official | 18:da299f395b9e | 530 | */ |
| mbed_official | 18:da299f395b9e | 531 | void dac_chan_disable( |
| mbed_official | 18:da299f395b9e | 532 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 533 | enum dac_channel channel) |
| mbed_official | 18:da299f395b9e | 534 | { |
| mbed_official | 18:da299f395b9e | 535 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 536 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 537 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 538 | |
| mbed_official | 18:da299f395b9e | 539 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 540 | |
| mbed_official | 18:da299f395b9e | 541 | /* Enable the module */ |
| mbed_official | 18:da299f395b9e | 542 | dac_module->DACCTRL[channel].reg &= ~DAC_DACCTRL_ENABLE; |
| mbed_official | 18:da299f395b9e | 543 | |
| mbed_official | 18:da299f395b9e | 544 | } |
| mbed_official | 18:da299f395b9e | 545 | |
| mbed_official | 18:da299f395b9e | 546 | /** |
| mbed_official | 18:da299f395b9e | 547 | * \brief Write to the DAC. |
| mbed_official | 18:da299f395b9e | 548 | * |
| mbed_official | 18:da299f395b9e | 549 | * This function writes to the DATA or DATABUF register. |
| mbed_official | 18:da299f395b9e | 550 | * If the conversion is not event-triggered, the data will be written to |
| mbed_official | 18:da299f395b9e | 551 | * the DATA register and the conversion will start. |
| mbed_official | 18:da299f395b9e | 552 | * If the conversion is event-triggered, the data will be written to DATABUF |
| mbed_official | 18:da299f395b9e | 553 | * and transferred to the DATA register and converted when a Start Conversion |
| mbed_official | 18:da299f395b9e | 554 | * Event is issued. |
| mbed_official | 18:da299f395b9e | 555 | * Conversion data must be right or left adjusted according to configuration |
| mbed_official | 18:da299f395b9e | 556 | * settings. |
| mbed_official | 18:da299f395b9e | 557 | * \note To be event triggered, the enable_start_on_event must be |
| mbed_official | 18:da299f395b9e | 558 | * enabled in the configuration. |
| mbed_official | 18:da299f395b9e | 559 | * |
| mbed_official | 18:da299f395b9e | 560 | * \param[in] module_inst Pointer to the DAC software device struct |
| mbed_official | 18:da299f395b9e | 561 | * \param[in] channel DAC channel to write to |
| mbed_official | 18:da299f395b9e | 562 | * \param[in] data Conversion data |
| mbed_official | 18:da299f395b9e | 563 | * |
| mbed_official | 18:da299f395b9e | 564 | * \return Status of the operation. |
| mbed_official | 18:da299f395b9e | 565 | * \retval STATUS_OK If the data was written |
| mbed_official | 18:da299f395b9e | 566 | */ |
| mbed_official | 18:da299f395b9e | 567 | enum status_code dac_chan_write( |
| mbed_official | 18:da299f395b9e | 568 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 569 | enum dac_channel channel, |
| mbed_official | 18:da299f395b9e | 570 | const uint16_t data) |
| mbed_official | 18:da299f395b9e | 571 | { |
| mbed_official | 18:da299f395b9e | 572 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 573 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 574 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 575 | |
| mbed_official | 18:da299f395b9e | 576 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 577 | |
| mbed_official | 18:da299f395b9e | 578 | while (dac_is_syncing(module_inst)) { |
| mbed_official | 18:da299f395b9e | 579 | /* Wait until the synchronization is complete */ |
| mbed_official | 18:da299f395b9e | 580 | } |
| mbed_official | 18:da299f395b9e | 581 | |
| mbed_official | 18:da299f395b9e | 582 | if (module_inst->start_on_event[channel]) { |
| mbed_official | 18:da299f395b9e | 583 | /* Write the new value to the buffered DAC data register */ |
| mbed_official | 18:da299f395b9e | 584 | dac_module->DATABUF[channel].reg = data; |
| mbed_official | 18:da299f395b9e | 585 | } else { |
| mbed_official | 18:da299f395b9e | 586 | /* Write the new value to the DAC data register */ |
| mbed_official | 18:da299f395b9e | 587 | dac_module->DATA[channel].reg = data; |
| mbed_official | 18:da299f395b9e | 588 | } |
| mbed_official | 18:da299f395b9e | 589 | |
| mbed_official | 18:da299f395b9e | 590 | return STATUS_OK; |
| mbed_official | 18:da299f395b9e | 591 | } |
| mbed_official | 18:da299f395b9e | 592 | |
| mbed_official | 18:da299f395b9e | 593 | /** |
| mbed_official | 18:da299f395b9e | 594 | * \brief Write to the DAC. |
| mbed_official | 18:da299f395b9e | 595 | * |
| mbed_official | 18:da299f395b9e | 596 | * This function converts a specific number of digital data. |
| mbed_official | 18:da299f395b9e | 597 | * The conversion should be event-triggered, the data will be written to DATABUF |
| mbed_official | 18:da299f395b9e | 598 | * and transferred to the DATA register and converted when a Start Conversion |
| mbed_official | 18:da299f395b9e | 599 | * Event is issued. |
| mbed_official | 18:da299f395b9e | 600 | * Conversion data must be right or left adjusted according to configuration |
| mbed_official | 18:da299f395b9e | 601 | * settings. |
| mbed_official | 18:da299f395b9e | 602 | * \note To be event triggered, the enable_start_on_event must be |
| mbed_official | 18:da299f395b9e | 603 | * enabled in the configuration. |
| mbed_official | 18:da299f395b9e | 604 | * |
| mbed_official | 18:da299f395b9e | 605 | * \param[in] module_inst Pointer to the DAC software device struct |
| mbed_official | 18:da299f395b9e | 606 | * \param[in] channel DAC channel to write to |
| mbed_official | 18:da299f395b9e | 607 | * \param[in] buffer Pointer to the digital data write buffer to be converted |
| mbed_official | 18:da299f395b9e | 608 | * \param[in] length Length of the write buffer |
| mbed_official | 18:da299f395b9e | 609 | * |
| mbed_official | 18:da299f395b9e | 610 | * \return Status of the operation. |
| mbed_official | 18:da299f395b9e | 611 | * \retval STATUS_OK If the data was written or no data conversion required |
| mbed_official | 18:da299f395b9e | 612 | * \retval STATUS_ERR_UNSUPPORTED_DEV The DAC is not configured as using event trigger |
| mbed_official | 18:da299f395b9e | 613 | * \retval STATUS_BUSY The DAC is busy and can not do the conversion |
| mbed_official | 18:da299f395b9e | 614 | */ |
| mbed_official | 18:da299f395b9e | 615 | enum status_code dac_chan_write_buffer_wait( |
| mbed_official | 18:da299f395b9e | 616 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 617 | enum dac_channel channel, |
| mbed_official | 18:da299f395b9e | 618 | uint16_t *buffer, |
| mbed_official | 18:da299f395b9e | 619 | uint32_t length) |
| mbed_official | 18:da299f395b9e | 620 | { |
| mbed_official | 18:da299f395b9e | 621 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 622 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 623 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 624 | |
| mbed_official | 18:da299f395b9e | 625 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 626 | |
| mbed_official | 18:da299f395b9e | 627 | while (dac_is_syncing(module_inst)) { |
| mbed_official | 18:da299f395b9e | 628 | /* Wait until the synchronization is complete */ |
| mbed_official | 18:da299f395b9e | 629 | } |
| mbed_official | 18:da299f395b9e | 630 | |
| mbed_official | 18:da299f395b9e | 631 | /* Zero length request */ |
| mbed_official | 18:da299f395b9e | 632 | if (length == 0) { |
| mbed_official | 18:da299f395b9e | 633 | /* No data to be converted */ |
| mbed_official | 18:da299f395b9e | 634 | return STATUS_OK; |
| mbed_official | 18:da299f395b9e | 635 | } |
| mbed_official | 18:da299f395b9e | 636 | |
| mbed_official | 18:da299f395b9e | 637 | #if DAC_CALLBACK_MODE == true |
| mbed_official | 18:da299f395b9e | 638 | /* Check if busy */ |
| mbed_official | 18:da299f395b9e | 639 | if (module_inst->job_status[channel] == STATUS_BUSY) { |
| mbed_official | 18:da299f395b9e | 640 | return STATUS_BUSY; |
| mbed_official | 18:da299f395b9e | 641 | } |
| mbed_official | 18:da299f395b9e | 642 | #endif |
| mbed_official | 18:da299f395b9e | 643 | |
| mbed_official | 18:da299f395b9e | 644 | /* Only support event triggered conversion */ |
| mbed_official | 18:da299f395b9e | 645 | if (module_inst->start_on_event[channel] == false) { |
| mbed_official | 18:da299f395b9e | 646 | return STATUS_ERR_UNSUPPORTED_DEV; |
| mbed_official | 18:da299f395b9e | 647 | } |
| mbed_official | 18:da299f395b9e | 648 | |
| mbed_official | 18:da299f395b9e | 649 | /* Blocks while buffer is being transferred */ |
| mbed_official | 18:da299f395b9e | 650 | while (length--) { |
| mbed_official | 18:da299f395b9e | 651 | /* Convert one data */ |
| mbed_official | 18:da299f395b9e | 652 | dac_chan_write(module_inst, channel, buffer[length]); |
| mbed_official | 18:da299f395b9e | 653 | |
| mbed_official | 18:da299f395b9e | 654 | /* Wait until Transmit is complete or timeout */ |
| mbed_official | 18:da299f395b9e | 655 | for (uint32_t i = 0; i <= DAC_TIMEOUT; i++) { |
| mbed_official | 18:da299f395b9e | 656 | if(channel == DAC_CHANNEL_0) { |
| mbed_official | 18:da299f395b9e | 657 | if (dac_module->INTFLAG.reg & DAC_INTFLAG_EMPTY0) { |
| mbed_official | 18:da299f395b9e | 658 | break; |
| mbed_official | 18:da299f395b9e | 659 | } else if (i == DAC_TIMEOUT) { |
| mbed_official | 18:da299f395b9e | 660 | return STATUS_ERR_TIMEOUT; |
| mbed_official | 18:da299f395b9e | 661 | } |
| mbed_official | 18:da299f395b9e | 662 | } else if(channel == DAC_CHANNEL_1) { |
| mbed_official | 18:da299f395b9e | 663 | if (dac_module->INTFLAG.reg & DAC_INTFLAG_EMPTY1) { |
| mbed_official | 18:da299f395b9e | 664 | break; |
| mbed_official | 18:da299f395b9e | 665 | } else if (i == DAC_TIMEOUT) { |
| mbed_official | 18:da299f395b9e | 666 | return STATUS_ERR_TIMEOUT; |
| mbed_official | 18:da299f395b9e | 667 | } |
| mbed_official | 18:da299f395b9e | 668 | } |
| mbed_official | 18:da299f395b9e | 669 | } |
| mbed_official | 18:da299f395b9e | 670 | } |
| mbed_official | 18:da299f395b9e | 671 | |
| mbed_official | 18:da299f395b9e | 672 | return STATUS_OK; |
| mbed_official | 18:da299f395b9e | 673 | } |
| mbed_official | 18:da299f395b9e | 674 | |
| mbed_official | 18:da299f395b9e | 675 | /** |
| mbed_official | 18:da299f395b9e | 676 | * \brief Retrieves the status of DAC channel end of conversion. |
| mbed_official | 18:da299f395b9e | 677 | * |
| mbed_official | 18:da299f395b9e | 678 | * Checks if the conversion is completed or not and returns boolean flag |
| mbed_official | 18:da299f395b9e | 679 | * of status. |
| mbed_official | 18:da299f395b9e | 680 | * |
| mbed_official | 18:da299f395b9e | 681 | * \param[in] module_inst Pointer to the DAC software instance struct |
| mbed_official | 18:da299f395b9e | 682 | * \param[in] channel Channel to disable |
| mbed_official | 18:da299f395b9e | 683 | * |
| mbed_official | 18:da299f395b9e | 684 | * \retval true Conversion is complete, VOUT is stable |
| mbed_official | 18:da299f395b9e | 685 | * \retval false No conversion completed since last load of DATA |
| mbed_official | 18:da299f395b9e | 686 | */ |
| mbed_official | 18:da299f395b9e | 687 | bool dac_chan_is_end_of_conversion( |
| mbed_official | 18:da299f395b9e | 688 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 689 | enum dac_channel channel) |
| mbed_official | 18:da299f395b9e | 690 | { |
| mbed_official | 18:da299f395b9e | 691 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 692 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 693 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 694 | |
| mbed_official | 18:da299f395b9e | 695 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 696 | |
| mbed_official | 18:da299f395b9e | 697 | if(dac_module->STATUS.reg & DAC_STATUS_EOC(channel + 1)) { |
| mbed_official | 18:da299f395b9e | 698 | return true; |
| mbed_official | 18:da299f395b9e | 699 | } else { |
| mbed_official | 18:da299f395b9e | 700 | return false; |
| mbed_official | 18:da299f395b9e | 701 | } |
| mbed_official | 18:da299f395b9e | 702 | } |
| mbed_official | 18:da299f395b9e | 703 | |
| mbed_official | 18:da299f395b9e | 704 | /** |
| mbed_official | 18:da299f395b9e | 705 | * \brief Retrieves the current module status. |
| mbed_official | 18:da299f395b9e | 706 | * |
| mbed_official | 18:da299f395b9e | 707 | * Checks the status of the module and returns it as a bitmask of status |
| mbed_official | 18:da299f395b9e | 708 | * flags. |
| mbed_official | 18:da299f395b9e | 709 | * |
| mbed_official | 18:da299f395b9e | 710 | * \param[in] module_inst Pointer to the DAC software device struct |
| mbed_official | 18:da299f395b9e | 711 | * |
| mbed_official | 18:da299f395b9e | 712 | * \return Bitmask of status flags. |
| mbed_official | 18:da299f395b9e | 713 | * |
| mbed_official | 18:da299f395b9e | 714 | * \retval DAC_STATUS_CHANNEL_0_EMPTY Data has been transferred from DATABUF |
| mbed_official | 18:da299f395b9e | 715 | * to DATA by a start conversion event |
| mbed_official | 18:da299f395b9e | 716 | * and DATABUF is ready for new data |
| mbed_official | 18:da299f395b9e | 717 | * \retval DAC_STATUS_CHANNEL_0_UNDERRUN A start conversion event has occurred |
| mbed_official | 18:da299f395b9e | 718 | * when DATABUF is empty |
| mbed_official | 18:da299f395b9e | 719 | * |
| mbed_official | 18:da299f395b9e | 720 | */ |
| mbed_official | 18:da299f395b9e | 721 | uint32_t dac_get_status( |
| mbed_official | 18:da299f395b9e | 722 | struct dac_module *const module_inst) |
| mbed_official | 18:da299f395b9e | 723 | { |
| mbed_official | 18:da299f395b9e | 724 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 725 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 726 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 727 | |
| mbed_official | 18:da299f395b9e | 728 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 729 | |
| mbed_official | 18:da299f395b9e | 730 | uint8_t intflags = dac_module->INTFLAG.reg; |
| mbed_official | 18:da299f395b9e | 731 | uint32_t status_flags = 0; |
| mbed_official | 18:da299f395b9e | 732 | |
| mbed_official | 18:da299f395b9e | 733 | if (intflags & DAC_INTFLAG_EMPTY0) { |
| mbed_official | 18:da299f395b9e | 734 | status_flags |= DAC_STATUS_CHANNEL_0_EMPTY; |
| mbed_official | 18:da299f395b9e | 735 | } |
| mbed_official | 18:da299f395b9e | 736 | |
| mbed_official | 18:da299f395b9e | 737 | if (intflags & DAC_INTFLAG_EMPTY1) { |
| mbed_official | 18:da299f395b9e | 738 | status_flags |= DAC_STATUS_CHANNEL_1_EMPTY; |
| mbed_official | 18:da299f395b9e | 739 | } |
| mbed_official | 18:da299f395b9e | 740 | |
| mbed_official | 18:da299f395b9e | 741 | if (intflags & DAC_INTFLAG_UNDERRUN0) { |
| mbed_official | 18:da299f395b9e | 742 | status_flags |= DAC_STATUS_CHANNEL_0_UNDERRUN; |
| mbed_official | 18:da299f395b9e | 743 | } |
| mbed_official | 18:da299f395b9e | 744 | |
| mbed_official | 18:da299f395b9e | 745 | if (intflags & DAC_INTFLAG_UNDERRUN1) { |
| mbed_official | 18:da299f395b9e | 746 | status_flags |= DAC_STATUS_CHANNEL_1_UNDERRUN; |
| mbed_official | 18:da299f395b9e | 747 | } |
| mbed_official | 18:da299f395b9e | 748 | |
| mbed_official | 18:da299f395b9e | 749 | return status_flags; |
| mbed_official | 18:da299f395b9e | 750 | } |
| mbed_official | 18:da299f395b9e | 751 | |
| mbed_official | 18:da299f395b9e | 752 | /** |
| mbed_official | 18:da299f395b9e | 753 | * \brief Clears a module status flag. |
| mbed_official | 18:da299f395b9e | 754 | * |
| mbed_official | 18:da299f395b9e | 755 | * Clears the given status flag of the module. |
| mbed_official | 18:da299f395b9e | 756 | * |
| mbed_official | 18:da299f395b9e | 757 | * \param[in] module_inst Pointer to the DAC software device struct |
| mbed_official | 18:da299f395b9e | 758 | * \param[in] status_flags Bit mask of status flags to clear |
| mbed_official | 18:da299f395b9e | 759 | * |
| mbed_official | 18:da299f395b9e | 760 | */ |
| mbed_official | 18:da299f395b9e | 761 | void dac_clear_status( |
| mbed_official | 18:da299f395b9e | 762 | struct dac_module *const module_inst, |
| mbed_official | 18:da299f395b9e | 763 | uint32_t status_flags) |
| mbed_official | 18:da299f395b9e | 764 | { |
| mbed_official | 18:da299f395b9e | 765 | /* Sanity check arguments */ |
| mbed_official | 18:da299f395b9e | 766 | Assert(module_inst); |
| mbed_official | 18:da299f395b9e | 767 | Assert(module_inst->hw); |
| mbed_official | 18:da299f395b9e | 768 | |
| mbed_official | 18:da299f395b9e | 769 | Dac *const dac_module = module_inst->hw; |
| mbed_official | 18:da299f395b9e | 770 | |
| mbed_official | 18:da299f395b9e | 771 | uint32_t intflags = 0; |
| mbed_official | 18:da299f395b9e | 772 | |
| mbed_official | 18:da299f395b9e | 773 | if (status_flags & DAC_STATUS_CHANNEL_0_EMPTY) { |
| mbed_official | 18:da299f395b9e | 774 | intflags |= DAC_INTFLAG_EMPTY0; |
| mbed_official | 18:da299f395b9e | 775 | } |
| mbed_official | 18:da299f395b9e | 776 | |
| mbed_official | 18:da299f395b9e | 777 | if (status_flags & DAC_STATUS_CHANNEL_1_EMPTY) { |
| mbed_official | 18:da299f395b9e | 778 | intflags |= DAC_INTFLAG_EMPTY1; |
| mbed_official | 18:da299f395b9e | 779 | } |
| mbed_official | 18:da299f395b9e | 780 | |
| mbed_official | 18:da299f395b9e | 781 | if (status_flags & DAC_STATUS_CHANNEL_0_UNDERRUN) { |
| mbed_official | 18:da299f395b9e | 782 | intflags |= DAC_INTFLAG_UNDERRUN0; |
| mbed_official | 18:da299f395b9e | 783 | } |
| mbed_official | 18:da299f395b9e | 784 | |
| mbed_official | 18:da299f395b9e | 785 | if (status_flags & DAC_STATUS_CHANNEL_1_UNDERRUN) { |
| mbed_official | 18:da299f395b9e | 786 | intflags |= DAC_INTFLAG_UNDERRUN1; |
| mbed_official | 18:da299f395b9e | 787 | } |
| mbed_official | 18:da299f395b9e | 788 | |
| mbed_official | 18:da299f395b9e | 789 | dac_module->INTFLAG.reg = intflags; |
| mbed_official | 18:da299f395b9e | 790 | } |