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- /**
- * \file
- *
- * \brief SAM Operational Amplifier Controller (OPAMP) Driver
- *
- * Copyright (C) 2014-2016 Atmel Corporation. All rights reserved.
- *
- * \asf_license_start
- *
- * \page License
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The name of Atmel may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * 4. This software may only be redistributed and used in connection with an
- * Atmel microcontroller product.
- *
- * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * \asf_license_stop
- *
- */
- /*
- * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
- */
- #include "opamp.h"
- void opamp_module_init(void)
- {
- struct system_clock_source_osculp32k_config config;
- /* Enable the OSCULP32K clock. */
- system_clock_source_osculp32k_get_config_defaults(&config);
- system_clock_source_osculp32k_set_config(&config);
- /* Turn on the digital interface clock. */
- system_apb_clock_set_mask(SYSTEM_CLOCK_APB_APBD, MCLK_APBDMASK_OPAMP);
- /* Reset module. */
- opamp_module_reset();
- /* Enable module. */
- opamp_module_enable();
- }
- static inline void _opamp_get_config_common_defaults(
- struct opamp_config_common *const config)
- {
- /* Sanity check arguments */
- Assert(config);
- /* Default configuration values */
- config->potentiometer_selection = OPAMP_POT_MUX_8R_8R;
- config->r1_enable = false;
- config->r2_vcc = false;
- config->r2_out = false;
- config->on_demand = false;
- config->run_in_standby = false;
- config->bias_value = OPAMP_BIAS_MODE_0;
- config->analog_out = false;
- }
- void opamp0_get_config_defaults(struct opamp0_config *const config)
- {
- /* Sanity check arguments */
- Assert(config);
- _opamp_get_config_common_defaults(&(config->config_common));
- /* Default configuration values */
- config->negative_input = OPAMP0_NEG_MUX_OUT0;
- config->positive_input = OPAMP0_POS_MUX_PIN0;
- config->r1_connection = OPAMP0_RES1_MUX_GND;
- }
- void opamp1_get_config_defaults(struct opamp1_config *const config)
- {
- /* Sanity check arguments */
- Assert(config);
- _opamp_get_config_common_defaults(&(config->config_common));
- /* Default configuration values */
- config->negative_input = OPAMP1_NEG_MUX_OUT1;
- config->positive_input = OPAMP1_POS_MUX_PIN1;
- config->r1_connection = OPAMP1_RES1_MUX_GND;
- }
- void opamp2_get_config_defaults(struct opamp2_config *const config)
- {
- /* Sanity check arguments */
- Assert(config);
- _opamp_get_config_common_defaults(&(config->config_common));
- /* Default configuration values */
- config->negative_input = OPAMP2_NEG_MUX_OUT2;
- config->positive_input = OPAMP2_POS_MUX_PIN2;
- config->r1_connection = OPAMP2_RES1_MUX_GND;
- }
- void opamp0_set_config(struct opamp0_config *const config)
- {
- uint32_t temp = 0;
- if (config->config_common.r1_enable) {
- temp |= OPAMP_OPAMPCTRL_RES1EN;
- }
- if (config->config_common.r2_vcc) {
- temp |= OPAMP_OPAMPCTRL_RES2VCC;
- }
- if (config->config_common.r2_out) {
- temp |= OPAMP_OPAMPCTRL_RES2OUT;
- }
- if (config->config_common.on_demand) {
- temp |= OPAMP_OPAMPCTRL_ONDEMAND;
- }
- if (config->config_common.run_in_standby) {
- temp |= OPAMP_OPAMPCTRL_RUNSTDBY;
- }
- if (config->config_common.analog_out) {
- temp |= OPAMP_OPAMPCTRL_ANAOUT;
- }
- OPAMP->OPAMPCTRL[0].reg = temp |
- config->config_common.potentiometer_selection |
- config->config_common.bias_value |
- config->negative_input |
- config->positive_input|
- config->r1_connection;
- }
- void opamp1_set_config(struct opamp1_config *const config)
- {
- uint32_t temp = 0;
- if (config->config_common.r1_enable) {
- temp |= OPAMP_OPAMPCTRL_RES1EN;
- }
- if (config->config_common.r2_vcc) {
- temp |= OPAMP_OPAMPCTRL_RES2VCC;
- }
- if (config->config_common.r2_out) {
- temp |= OPAMP_OPAMPCTRL_RES2OUT;
- }
- if (config->config_common.on_demand) {
- temp |= OPAMP_OPAMPCTRL_ONDEMAND;
- }
- if (config->config_common.run_in_standby) {
- temp |= OPAMP_OPAMPCTRL_RUNSTDBY;
- }
- if (config->config_common.analog_out) {
- temp |= OPAMP_OPAMPCTRL_ANAOUT;
- }
- OPAMP->OPAMPCTRL[1].reg = temp |
- config->config_common.potentiometer_selection |
- config->config_common.bias_value |
- config->negative_input |
- config->positive_input|
- config->r1_connection;
- }
- void opamp2_set_config(struct opamp2_config *const config)
- {
- uint32_t temp = 0;
- if (config->config_common.r1_enable) {
- temp |= OPAMP_OPAMPCTRL_RES1EN;
- }
- if (config->config_common.r2_vcc) {
- temp |= OPAMP_OPAMPCTRL_RES2VCC;
- }
- if (config->config_common.r2_out) {
- temp |= OPAMP_OPAMPCTRL_RES2OUT;
- }
- if (config->config_common.on_demand) {
- temp |= OPAMP_OPAMPCTRL_ONDEMAND;
- }
- if (config->config_common.run_in_standby) {
- temp |= OPAMP_OPAMPCTRL_RUNSTDBY;
- }
- if (config->config_common.analog_out) {
- temp |= OPAMP_OPAMPCTRL_ANAOUT;
- }
- OPAMP->OPAMPCTRL[2].reg = temp |
- config->config_common.potentiometer_selection |
- config->config_common.bias_value |
- config->negative_input |
- config->positive_input|
- config->r1_connection;
- }
- void opamp_enable(const enum opamp_id number)
- {
- /* Sanity check arguments */
- Assert(number);
- /* Enable the OPAMP */
- if (number == OPAMP_0) {
- OPAMP->OPAMPCTRL[0].reg |= OPAMP_OPAMPCTRL_ENABLE;
- } else if (number == OPAMP_1) {
- OPAMP->OPAMPCTRL[1].reg |= OPAMP_OPAMPCTRL_ENABLE;
- } else if (number == OPAMP_2) {
- OPAMP->OPAMPCTRL[2].reg |= OPAMP_OPAMPCTRL_ENABLE;
- }
- }
- void opamp_disable(const enum opamp_id number)
- {
- /* Sanity check arguments */
- Assert(number);
- /* Disable the OPAMP */
- if (number == OPAMP_0) {
- OPAMP->OPAMPCTRL[0].reg &= ~OPAMP_OPAMPCTRL_ENABLE;
- } else if (number == OPAMP_1) {
- OPAMP->OPAMPCTRL[1].reg &= ~OPAMP_OPAMPCTRL_ENABLE;
- } else if (number == OPAMP_2) {
- OPAMP->OPAMPCTRL[2].reg &= ~OPAMP_OPAMPCTRL_ENABLE;
- }
- }
- bool opamp_is_ready(const enum opamp_id number)
- {
- /* Sanity check arguments */
- Assert(number);
- /* Get the OPAMP output ready status*/
- if (number == OPAMP_0) {
- return OPAMP->STATUS.bit.READY0;
- } else if (number == OPAMP_1) {
- return OPAMP->STATUS.bit.READY1;
- } else if (number == OPAMP_2) {
- return OPAMP->STATUS.bit.READY2;
- }
- return false;
- }
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