Aaron Fischer
f24858d162
This step seems bold, but is saves us so much hassle. Even better, we have a reliable codebase, with all the dependencies (and their versions) we need in order to build the project. If a library got an update, we can replace it inplace if the code is still compatible.
315 lines
11 KiB
C
315 lines
11 KiB
C
/* This source file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */
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/*This file is prepared for Doxygen automatic documentation generation.*/
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/*! \file *********************************************************************
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*
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* \brief TC driver for AVR32 UC3.
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*
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* AVR32 Timer/Counter driver module.
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*
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* - Compiler: IAR EWAVR32 and GNU GCC for AVR32
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* - Supported devices: All AVR32 devices with a TC module can be used.
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* - AppNote:
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*
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* \author Atmel Corporation: http://www.atmel.com \n
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* Support and FAQ: http://support.atmel.no/
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*
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******************************************************************************/
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/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
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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, this
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* 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 Atmel
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* AVR 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 DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
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*
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*/
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#include <avr32/io.h>
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#include "compiler.h"
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#include "tc.h"
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int tc_get_interrupt_settings(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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return tc->channel[channel].imr;
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}
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int tc_configure_interrupts(volatile avr32_tc_t *tc, unsigned int channel, const tc_interrupt_t *bitfield)
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{
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Bool global_interrupt_enabled = Is_global_interrupt_enabled();
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// Enable the appropriate interrupts.
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tc->channel[channel].ier = bitfield->etrgs << AVR32_TC_ETRGS_OFFSET |
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bitfield->ldrbs << AVR32_TC_LDRBS_OFFSET |
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bitfield->ldras << AVR32_TC_LDRAS_OFFSET |
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bitfield->cpcs << AVR32_TC_CPCS_OFFSET |
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bitfield->cpbs << AVR32_TC_CPBS_OFFSET |
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bitfield->cpas << AVR32_TC_CPAS_OFFSET |
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bitfield->lovrs << AVR32_TC_LOVRS_OFFSET |
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bitfield->covfs << AVR32_TC_COVFS_OFFSET;
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// Disable the appropriate interrupts.
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if (global_interrupt_enabled) Disable_global_interrupt();
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tc->channel[channel].idr = (~bitfield->etrgs & 1) << AVR32_TC_ETRGS_OFFSET |
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(~bitfield->ldrbs & 1) << AVR32_TC_LDRBS_OFFSET |
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(~bitfield->ldras & 1) << AVR32_TC_LDRAS_OFFSET |
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(~bitfield->cpcs & 1) << AVR32_TC_CPCS_OFFSET |
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(~bitfield->cpbs & 1) << AVR32_TC_CPBS_OFFSET |
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(~bitfield->cpas & 1) << AVR32_TC_CPAS_OFFSET |
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(~bitfield->lovrs & 1) << AVR32_TC_LOVRS_OFFSET |
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(~bitfield->covfs & 1) << AVR32_TC_COVFS_OFFSET;
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tc->channel[channel].sr;
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if (global_interrupt_enabled) Enable_global_interrupt();
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return 0;
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}
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int tc_select_external_clock(volatile avr32_tc_t *tc, unsigned int channel, unsigned int ext_clk_sig_src)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS || ext_clk_sig_src >= 1 << AVR32_TC_BMR_TC0XC0S_SIZE)
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return TC_INVALID_ARGUMENT;
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// Clear bit-field and set the correct behavior.
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tc->bmr = (tc->bmr & ~(AVR32_TC_BMR_TC0XC0S_MASK << (channel * AVR32_TC_BMR_TC0XC0S_SIZE))) |
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(ext_clk_sig_src << (channel * AVR32_TC_BMR_TC0XC0S_SIZE));
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return 0;
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}
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int tc_init_capture(volatile avr32_tc_t *tc, const tc_capture_opt_t *opt)
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{
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// Check for valid input.
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if (opt->channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// MEASURE SIGNALS: Capture operating mode.
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tc->channel[opt->channel].cmr = opt->ldrb << AVR32_TC_LDRB_OFFSET |
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opt->ldra << AVR32_TC_LDRA_OFFSET |
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0 << AVR32_TC_WAVE_OFFSET |
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opt->cpctrg << AVR32_TC_CPCTRG_OFFSET |
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opt->abetrg << AVR32_TC_ABETRG_OFFSET |
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opt->etrgedg << AVR32_TC_ETRGEDG_OFFSET|
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opt->ldbdis << AVR32_TC_LDBDIS_OFFSET |
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opt->ldbstop << AVR32_TC_LDBSTOP_OFFSET |
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opt->burst << AVR32_TC_BURST_OFFSET |
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opt->clki << AVR32_TC_CLKI_OFFSET |
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opt->tcclks << AVR32_TC_TCCLKS_OFFSET;
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return 0;
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}
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int tc_init_waveform(volatile avr32_tc_t *tc, const tc_waveform_opt_t *opt)
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{
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// Check for valid input.
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if (opt->channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// GENERATE SIGNALS: Waveform operating mode.
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tc->channel[opt->channel].cmr = opt->bswtrg << AVR32_TC_BSWTRG_OFFSET |
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opt->beevt << AVR32_TC_BEEVT_OFFSET |
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opt->bcpc << AVR32_TC_BCPC_OFFSET |
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opt->bcpb << AVR32_TC_BCPB_OFFSET |
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opt->aswtrg << AVR32_TC_ASWTRG_OFFSET |
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opt->aeevt << AVR32_TC_AEEVT_OFFSET |
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opt->acpc << AVR32_TC_ACPC_OFFSET |
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opt->acpa << AVR32_TC_ACPA_OFFSET |
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1 << AVR32_TC_WAVE_OFFSET |
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opt->wavsel << AVR32_TC_WAVSEL_OFFSET |
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opt->enetrg << AVR32_TC_ENETRG_OFFSET |
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opt->eevt << AVR32_TC_EEVT_OFFSET |
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opt->eevtedg << AVR32_TC_EEVTEDG_OFFSET |
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opt->cpcdis << AVR32_TC_CPCDIS_OFFSET |
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opt->cpcstop << AVR32_TC_CPCSTOP_OFFSET |
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opt->burst << AVR32_TC_BURST_OFFSET |
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opt->clki << AVR32_TC_CLKI_OFFSET |
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opt->tcclks << AVR32_TC_TCCLKS_OFFSET;
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return 0;
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}
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int tc_start(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// Enable, reset and start the selected timer/counter channel.
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tc->channel[channel].ccr = AVR32_TC_SWTRG_MASK | AVR32_TC_CLKEN_MASK;
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return 0;
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}
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int tc_stop(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// Disable the selected timer/counter channel.
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tc->channel[channel].ccr = AVR32_TC_CLKDIS_MASK;
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return 0;
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}
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int tc_software_trigger(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// Reset the selected timer/counter channel.
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tc->channel[channel].ccr = AVR32_TC_SWTRG_MASK;
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return 0;
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}
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void tc_sync_trigger(volatile avr32_tc_t *tc)
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{
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// Reset all channels of the selected timer/counter.
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tc->bcr = AVR32_TC_BCR_SYNC_MASK;
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}
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void tc_sync_start(volatile avr32_tc_t *tc)
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{
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unsigned int i;
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// Enable the clock for each channel.
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for(i=0; i<TC_NUMBER_OF_CHANNELS;i++)
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tc->channel[i].ccr = AVR32_TC_CLKEN_MASK;
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// Reset all channels of the selected timer/counter.
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tc->bcr = AVR32_TC_BCR_SYNC_MASK;
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}
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int tc_read_sr(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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return tc->channel[channel].sr;
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}
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int tc_read_tc(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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return Rd_bitfield(tc->channel[channel].cv, AVR32_TC_CV_MASK);
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}
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int tc_read_ra(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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return Rd_bitfield(tc->channel[channel].ra, AVR32_TC_RA_MASK);
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}
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int tc_read_rb(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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return Rd_bitfield(tc->channel[channel].rb, AVR32_TC_RB_MASK);
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}
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int tc_read_rc(volatile avr32_tc_t *tc, unsigned int channel)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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return Rd_bitfield(tc->channel[channel].rc, AVR32_TC_RC_MASK);
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}
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int tc_write_ra(volatile avr32_tc_t *tc, unsigned int channel, unsigned short value)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// This function is only available in WAVEFORM mode.
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if (Tst_bits(tc->channel[channel].cmr, AVR32_TC_WAVE_MASK))
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Wr_bitfield(tc->channel[channel].ra, AVR32_TC_RA_MASK, value);
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return value;
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}
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int tc_write_rb(volatile avr32_tc_t *tc, unsigned int channel, unsigned short value)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// This function is only available in WAVEFORM mode.
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if (Tst_bits(tc->channel[channel].cmr, AVR32_TC_WAVE_MASK))
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Wr_bitfield(tc->channel[channel].rb, AVR32_TC_RB_MASK, value);
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return value;
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}
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int tc_write_rc(volatile avr32_tc_t *tc, unsigned int channel, unsigned short value)
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{
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// Check for valid input.
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if (channel >= TC_NUMBER_OF_CHANNELS)
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return TC_INVALID_ARGUMENT;
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// This function is only available in WAVEFORM mode.
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if (Tst_bits(tc->channel[channel].cmr, AVR32_TC_WAVE_MASK))
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Wr_bitfield(tc->channel[channel].rc, AVR32_TC_RC_MASK, value);
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return value;
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}
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