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