155 lines
4.5 KiB
C
155 lines
4.5 KiB
C
/**
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* \file
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*
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* \brief SAM Configurable Custom Logic (CCL) Driver
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*
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* Copyright (C) 2014-2015 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 "ccl.h"
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void ccl_init(struct ccl_config *const config)
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{
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#if (SAML22) || (SAMC20) || (SAMC21)
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/* Turn on the digital interface clock. */
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system_apb_clock_set_mask(SYSTEM_CLOCK_APB_APBC, MCLK_APBCMASK_CCL);
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#else
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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_CCL);
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#endif
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/* Reset module. */
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ccl_module_reset();
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/* Configure GCLK channel and enable clock */
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struct system_gclk_chan_config gclk_chan_conf;
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system_gclk_chan_get_config_defaults(&gclk_chan_conf);
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gclk_chan_conf.source_generator = config->clock_source;
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system_gclk_chan_set_config(CCL_GCLK_ID, &gclk_chan_conf);
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system_gclk_chan_enable(CCL_GCLK_ID);
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if(config->run_in_standby) {
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/* Enable run in standy mode. */
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CCL->CTRL.reg |= CCL_CTRL_RUNSTDBY;
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} else {
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/* Disable run in standy mode. */
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CCL->CTRL.reg &= ~ CCL_CTRL_RUNSTDBY;
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}
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}
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void ccl_lut_get_config_defaults(struct ccl_lut_config *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->truth_table_value = 0x00;
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config->event_output_enable = false;
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config->event_input_enable = false;
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config->event_input_inverted_enable = false;
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config->input0_src_sel = CCL_LUT_INPUT_SRC_MASK;
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config->input1_src_sel = CCL_LUT_INPUT_SRC_MASK;
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config->input2_src_sel = CCL_LUT_INPUT_SRC_MASK;
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config->edge_selection_enable = false;
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config->filter_sel = CCL_LUT_FILTER_DISABLE;
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}
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enum status_code ccl_lut_set_config(const enum ccl_lut_id number,
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struct ccl_lut_config *const config)
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{
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/* Sanity check arguments */
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Assert(config);
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uint32_t temp = 0;
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if(CCL->CTRL.reg & CCL_CTRL_ENABLE)
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return STATUS_BUSY;
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if (config->event_output_enable) {
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temp |= CCL_LUTCTRL_LUTEO;
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}
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if (config->event_input_enable) {
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temp |= CCL_LUTCTRL_LUTEI;
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}
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if (config->event_input_inverted_enable) {
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temp |= CCL_LUTCTRL_INVEI;
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}
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if (config->edge_selection_enable) {
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temp |= CCL_LUTCTRL_EDGESEL;
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}
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CCL->LUTCTRL[number].reg = temp |
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CCL_LUTCTRL_INSEL0(config->input0_src_sel) |
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CCL_LUTCTRL_INSEL1(config->input1_src_sel) |
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CCL_LUTCTRL_INSEL2(config->input2_src_sel) |
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CCL_LUTCTRL_TRUTH(config->truth_table_value) |
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config->filter_sel;
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return STATUS_OK;
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}
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enum status_code ccl_seq_config(const enum ccl_seq_id number,
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const enum ccl_seq_selection seq_selection)
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{
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if(CCL->CTRL.reg & CCL_CTRL_ENABLE)
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return STATUS_BUSY;
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CCL->SEQCTRL[number].reg = seq_selection;
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return STATUS_OK;
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}
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void ccl_lut_enable(const enum ccl_lut_id number)
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{
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/* Enable the LUTx */
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CCL->LUTCTRL[number].reg |= CCL_LUTCTRL_ENABLE;
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}
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void ccl_lut_disable(const enum ccl_lut_id number)
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{
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/* Disable the LUTx */
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CCL->LUTCTRL[number].reg &= ~CCL_LUTCTRL_ENABLE;
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}
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