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authorDavid A. Mellis <d.mellis@arduino.cc>2012-09-13 10:41:16 -0400
committerDavid A. Mellis <d.mellis@arduino.cc>2012-09-13 10:41:16 -0400
commit0d9a111face4f3629bcae8e52af843792af3b453 (patch)
tree7cc1b8c1b0c1acb7c90a75f258ce036dac494b17 /firmwares/wifishield/wifiHD/src/SOFTWARE_FRAMEWORK/DRIVERS/TC/tc.c
Moving into firmwares directory.
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+/* This source file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */
+
+/*This file is prepared for Doxygen automatic documentation generation.*/
+/*! \file *********************************************************************
+ *
+ * \brief TC driver for AVR32 UC3.
+ *
+ * AVR32 Timer/Counter driver module.
+ *
+ * - Compiler: IAR EWAVR32 and GNU GCC for AVR32
+ * - Supported devices: All AVR32 devices with a TC module can be used.
+ * - AppNote:
+ *
+ * \author Atmel Corporation: http://www.atmel.com \n
+ * Support and FAQ: http://support.atmel.no/
+ *
+ ******************************************************************************/
+
+/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
+ *
+ * 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
+ * AVR 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
+ *
+ */
+
+#include <avr32/io.h>
+#include "compiler.h"
+#include "tc.h"
+
+
+int tc_get_interrupt_settings(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ return tc->channel[channel].imr;
+}
+
+
+int tc_configure_interrupts(volatile avr32_tc_t *tc, unsigned int channel, const tc_interrupt_t *bitfield)
+{
+ Bool global_interrupt_enabled = Is_global_interrupt_enabled();
+
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // Enable the appropriate interrupts.
+ tc->channel[channel].ier = bitfield->etrgs << AVR32_TC_ETRGS_OFFSET |
+ bitfield->ldrbs << AVR32_TC_LDRBS_OFFSET |
+ bitfield->ldras << AVR32_TC_LDRAS_OFFSET |
+ bitfield->cpcs << AVR32_TC_CPCS_OFFSET |
+ bitfield->cpbs << AVR32_TC_CPBS_OFFSET |
+ bitfield->cpas << AVR32_TC_CPAS_OFFSET |
+ bitfield->lovrs << AVR32_TC_LOVRS_OFFSET |
+ bitfield->covfs << AVR32_TC_COVFS_OFFSET;
+
+ // Disable the appropriate interrupts.
+ if (global_interrupt_enabled) Disable_global_interrupt();
+ tc->channel[channel].idr = (~bitfield->etrgs & 1) << AVR32_TC_ETRGS_OFFSET |
+ (~bitfield->ldrbs & 1) << AVR32_TC_LDRBS_OFFSET |
+ (~bitfield->ldras & 1) << AVR32_TC_LDRAS_OFFSET |
+ (~bitfield->cpcs & 1) << AVR32_TC_CPCS_OFFSET |
+ (~bitfield->cpbs & 1) << AVR32_TC_CPBS_OFFSET |
+ (~bitfield->cpas & 1) << AVR32_TC_CPAS_OFFSET |
+ (~bitfield->lovrs & 1) << AVR32_TC_LOVRS_OFFSET |
+ (~bitfield->covfs & 1) << AVR32_TC_COVFS_OFFSET;
+ tc->channel[channel].sr;
+ if (global_interrupt_enabled) Enable_global_interrupt();
+
+ return 0;
+}
+
+
+int tc_select_external_clock(volatile avr32_tc_t *tc, unsigned int channel, unsigned int ext_clk_sig_src)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS || ext_clk_sig_src >= 1 << AVR32_TC_BMR_TC0XC0S_SIZE)
+ return TC_INVALID_ARGUMENT;
+
+ // Clear bit-field and set the correct behavior.
+ tc->bmr = (tc->bmr & ~(AVR32_TC_BMR_TC0XC0S_MASK << (channel * AVR32_TC_BMR_TC0XC0S_SIZE))) |
+ (ext_clk_sig_src << (channel * AVR32_TC_BMR_TC0XC0S_SIZE));
+
+ return 0;
+}
+
+
+int tc_init_capture(volatile avr32_tc_t *tc, const tc_capture_opt_t *opt)
+{
+ // Check for valid input.
+ if (opt->channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // MEASURE SIGNALS: Capture operating mode.
+ tc->channel[opt->channel].cmr = opt->ldrb << AVR32_TC_LDRB_OFFSET |
+ opt->ldra << AVR32_TC_LDRA_OFFSET |
+ 0 << AVR32_TC_WAVE_OFFSET |
+ opt->cpctrg << AVR32_TC_CPCTRG_OFFSET |
+ opt->abetrg << AVR32_TC_ABETRG_OFFSET |
+ opt->etrgedg << AVR32_TC_ETRGEDG_OFFSET|
+ opt->ldbdis << AVR32_TC_LDBDIS_OFFSET |
+ opt->ldbstop << AVR32_TC_LDBSTOP_OFFSET |
+ opt->burst << AVR32_TC_BURST_OFFSET |
+ opt->clki << AVR32_TC_CLKI_OFFSET |
+ opt->tcclks << AVR32_TC_TCCLKS_OFFSET;
+
+ return 0;
+}
+
+
+int tc_init_waveform(volatile avr32_tc_t *tc, const tc_waveform_opt_t *opt)
+{
+ // Check for valid input.
+ if (opt->channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // GENERATE SIGNALS: Waveform operating mode.
+ tc->channel[opt->channel].cmr = opt->bswtrg << AVR32_TC_BSWTRG_OFFSET |
+ opt->beevt << AVR32_TC_BEEVT_OFFSET |
+ opt->bcpc << AVR32_TC_BCPC_OFFSET |
+ opt->bcpb << AVR32_TC_BCPB_OFFSET |
+ opt->aswtrg << AVR32_TC_ASWTRG_OFFSET |
+ opt->aeevt << AVR32_TC_AEEVT_OFFSET |
+ opt->acpc << AVR32_TC_ACPC_OFFSET |
+ opt->acpa << AVR32_TC_ACPA_OFFSET |
+ 1 << AVR32_TC_WAVE_OFFSET |
+ opt->wavsel << AVR32_TC_WAVSEL_OFFSET |
+ opt->enetrg << AVR32_TC_ENETRG_OFFSET |
+ opt->eevt << AVR32_TC_EEVT_OFFSET |
+ opt->eevtedg << AVR32_TC_EEVTEDG_OFFSET |
+ opt->cpcdis << AVR32_TC_CPCDIS_OFFSET |
+ opt->cpcstop << AVR32_TC_CPCSTOP_OFFSET |
+ opt->burst << AVR32_TC_BURST_OFFSET |
+ opt->clki << AVR32_TC_CLKI_OFFSET |
+ opt->tcclks << AVR32_TC_TCCLKS_OFFSET;
+
+ return 0;
+}
+
+
+int tc_start(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // Enable, reset and start the selected timer/counter channel.
+ tc->channel[channel].ccr = AVR32_TC_SWTRG_MASK | AVR32_TC_CLKEN_MASK;
+
+ return 0;
+}
+
+
+int tc_stop(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // Disable the selected timer/counter channel.
+ tc->channel[channel].ccr = AVR32_TC_CLKDIS_MASK;
+
+ return 0;
+}
+
+
+int tc_software_trigger(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // Reset the selected timer/counter channel.
+ tc->channel[channel].ccr = AVR32_TC_SWTRG_MASK;
+
+ return 0;
+}
+
+
+void tc_sync_trigger(volatile avr32_tc_t *tc)
+{
+ // Reset all channels of the selected timer/counter.
+ tc->bcr = AVR32_TC_BCR_SYNC_MASK;
+}
+
+
+void tc_sync_start(volatile avr32_tc_t *tc)
+{
+ unsigned int i;
+ // Enable the clock for each channel.
+ for(i=0; i<TC_NUMBER_OF_CHANNELS;i++)
+ tc->channel[i].ccr = AVR32_TC_CLKEN_MASK;
+
+ // Reset all channels of the selected timer/counter.
+ tc->bcr = AVR32_TC_BCR_SYNC_MASK;
+}
+
+
+int tc_read_sr(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ return tc->channel[channel].sr;
+}
+
+
+int tc_read_tc(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ return Rd_bitfield(tc->channel[channel].cv, AVR32_TC_CV_MASK);
+}
+
+
+int tc_read_ra(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ return Rd_bitfield(tc->channel[channel].ra, AVR32_TC_RA_MASK);
+}
+
+
+int tc_read_rb(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ return Rd_bitfield(tc->channel[channel].rb, AVR32_TC_RB_MASK);
+}
+
+
+int tc_read_rc(volatile avr32_tc_t *tc, unsigned int channel)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ return Rd_bitfield(tc->channel[channel].rc, AVR32_TC_RC_MASK);
+}
+
+
+int tc_write_ra(volatile avr32_tc_t *tc, unsigned int channel, unsigned short value)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // This function is only available in WAVEFORM mode.
+ if (Tst_bits(tc->channel[channel].cmr, AVR32_TC_WAVE_MASK))
+ Wr_bitfield(tc->channel[channel].ra, AVR32_TC_RA_MASK, value);
+
+ return value;
+}
+
+
+int tc_write_rb(volatile avr32_tc_t *tc, unsigned int channel, unsigned short value)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // This function is only available in WAVEFORM mode.
+ if (Tst_bits(tc->channel[channel].cmr, AVR32_TC_WAVE_MASK))
+ Wr_bitfield(tc->channel[channel].rb, AVR32_TC_RB_MASK, value);
+
+ return value;
+}
+
+
+int tc_write_rc(volatile avr32_tc_t *tc, unsigned int channel, unsigned short value)
+{
+ // Check for valid input.
+ if (channel >= TC_NUMBER_OF_CHANNELS)
+ return TC_INVALID_ARGUMENT;
+
+ // This function is only available in WAVEFORM mode.
+ if (Tst_bits(tc->channel[channel].cmr, AVR32_TC_WAVE_MASK))
+ Wr_bitfield(tc->channel[channel].rc, AVR32_TC_RC_MASK, value);
+
+ return value;
+}