1 /** 2 * \file 3 * 4 * \brief SAM D20 Clock configuration 5 * 6 * Copyright (C) 2012-2015 Atmel Corporation. All rights reserved. 7 * 8 * \asf_license_start 9 * 10 * \page License 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright notice, 16 * this list of conditions and the following disclaimer. 17 * 18 * 2. Redistributions in binary form must reproduce the above copyright notice, 19 * this list of conditions and the following disclaimer in the documentation 20 * and/or other materials provided with the distribution. 21 * 22 * 3. The name of Atmel may not be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * 4. This software may only be redistributed and used in connection with an 26 * Atmel microcontroller product. 27 * 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 * 40 * \asf_license_stop 41 * 42 */ 43 /* 44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> 45 */ 46 #include <clock.h> 47 48 #ifndef CONF_CLOCKS_H_INCLUDED 49 # define CONF_CLOCKS_H_INCLUDED 50 51 /* System clock bus configuration */ 52 # define CONF_CLOCK_FLASH_WAIT_STATES 0 53 # define CONF_CLOCK_CPU_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1 54 # define CONF_CLOCK_APBA_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1 55 # define CONF_CLOCK_APBB_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1 56 # define CONF_CLOCK_APBC_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1 57 58 /* SYSTEM_CLOCK_SOURCE_OSC8M configuration - Internal 8MHz oscillator */ 59 # define CONF_CLOCK_OSC8M_PRESCALER SYSTEM_OSC8M_DIV_1 60 # define CONF_CLOCK_OSC8M_ON_DEMAND true 61 # define CONF_CLOCK_OSC8M_RUN_IN_STANDBY false 62 63 /* SYSTEM_CLOCK_SOURCE_XOSC configuration - External clock/oscillator */ 64 # define CONF_CLOCK_XOSC_ENABLE false 65 # define CONF_CLOCK_XOSC_EXTERNAL_CRYSTAL SYSTEM_CLOCK_EXTERNAL_CRYSTAL 66 # define CONF_CLOCK_XOSC_EXTERNAL_FREQUENCY 12000000UL 67 # define CONF_CLOCK_XOSC_STARTUP_TIME SYSTEM_XOSC_STARTUP_32768 68 # define CONF_CLOCK_XOSC_AUTO_GAIN_CONTROL true 69 # define CONF_CLOCK_XOSC_ON_DEMAND true 70 # define CONF_CLOCK_XOSC_RUN_IN_STANDBY false 71 72 /* SYSTEM_CLOCK_SOURCE_XOSC32K configuration - External 32KHz crystal/clock oscillator */ 73 # define CONF_CLOCK_XOSC32K_ENABLE false 74 # define CONF_CLOCK_XOSC32K_EXTERNAL_CRYSTAL SYSTEM_CLOCK_EXTERNAL_CRYSTAL 75 # define CONF_CLOCK_XOSC32K_STARTUP_TIME SYSTEM_XOSC32K_STARTUP_65536 76 # define CONF_CLOCK_XOSC32K_AUTO_AMPLITUDE_CONTROL false 77 # define CONF_CLOCK_XOSC32K_ENABLE_1KHZ_OUPUT false 78 # define CONF_CLOCK_XOSC32K_ENABLE_32KHZ_OUTPUT true 79 # define CONF_CLOCK_XOSC32K_ON_DEMAND true 80 # define CONF_CLOCK_XOSC32K_RUN_IN_STANDBY false 81 82 /* SYSTEM_CLOCK_SOURCE_OSC32K configuration - Internal 32KHz oscillator */ 83 # define CONF_CLOCK_OSC32K_ENABLE false 84 # define CONF_CLOCK_OSC32K_STARTUP_TIME SYSTEM_OSC32K_STARTUP_130 85 # define CONF_CLOCK_OSC32K_ENABLE_1KHZ_OUTPUT true 86 # define CONF_CLOCK_OSC32K_ENABLE_32KHZ_OUTPUT true 87 # define CONF_CLOCK_OSC32K_ON_DEMAND true 88 # define CONF_CLOCK_OSC32K_RUN_IN_STANDBY false 89 90 /* SYSTEM_CLOCK_SOURCE_DFLL configuration - Digital Frequency Locked Loop */ 91 # define CONF_CLOCK_DFLL_ENABLE false 92 # define CONF_CLOCK_DFLL_LOOP_MODE SYSTEM_CLOCK_DFLL_LOOP_MODE_OPEN 93 # define CONF_CLOCK_DFLL_ON_DEMAND false 94 95 /* DFLL open loop mode configuration */ 96 # define CONF_CLOCK_DFLL_FINE_VALUE (512) 97 98 /* DFLL closed loop mode configuration */ 99 # define CONF_CLOCK_DFLL_SOURCE_GCLK_GENERATOR GCLK_GENERATOR_1 100 # define CONF_CLOCK_DFLL_MULTIPLY_FACTOR 1465 /* (48000000 / 32768) */ 101 # define CONF_CLOCK_DFLL_QUICK_LOCK true 102 # define CONF_CLOCK_DFLL_TRACK_AFTER_FINE_LOCK true 103 # define CONF_CLOCK_DFLL_KEEP_LOCK_ON_WAKEUP true 104 # define CONF_CLOCK_DFLL_ENABLE_CHILL_CYCLE true 105 # define CONF_CLOCK_DFLL_MAX_COARSE_STEP_SIZE (0x1f / 4) 106 # define CONF_CLOCK_DFLL_MAX_FINE_STEP_SIZE (0xff / 4) 107 108 109 /* Set this to true to configure the GCLK when running clocks_init. If set to 110 * false, none of the GCLK generators will be configured in clocks_init(). */ 111 # define CONF_CLOCK_CONFIGURE_GCLK true 112 113 /* Configure GCLK generator 0 (Main Clock) */ 114 # define CONF_CLOCK_GCLK_0_ENABLE true 115 # define CONF_CLOCK_GCLK_0_RUN_IN_STANDBY false 116 # define CONF_CLOCK_GCLK_0_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M 117 # define CONF_CLOCK_GCLK_0_PRESCALER 1 118 # define CONF_CLOCK_GCLK_0_OUTPUT_ENABLE false 119 120 /* Configure GCLK generator 1 */ 121 # define CONF_CLOCK_GCLK_1_ENABLE false 122 # define CONF_CLOCK_GCLK_1_RUN_IN_STANDBY false 123 # define CONF_CLOCK_GCLK_1_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_XOSC32K 124 # define CONF_CLOCK_GCLK_1_PRESCALER 1 125 # define CONF_CLOCK_GCLK_1_OUTPUT_ENABLE false 126 127 /* Configure GCLK generator 2 (RTC) */ 128 # define CONF_CLOCK_GCLK_2_ENABLE false 129 # define CONF_CLOCK_GCLK_2_RUN_IN_STANDBY false 130 # define CONF_CLOCK_GCLK_2_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC32K 131 # define CONF_CLOCK_GCLK_2_PRESCALER 32 132 # define CONF_CLOCK_GCLK_2_OUTPUT_ENABLE false 133 134 /* Configure GCLK generator 3 */ 135 # define CONF_CLOCK_GCLK_3_ENABLE false 136 # define CONF_CLOCK_GCLK_3_RUN_IN_STANDBY false 137 # define CONF_CLOCK_GCLK_3_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M 138 # define CONF_CLOCK_GCLK_3_PRESCALER 1 139 # define CONF_CLOCK_GCLK_3_OUTPUT_ENABLE false 140 141 /* Configure GCLK generator 4 */ 142 # define CONF_CLOCK_GCLK_4_ENABLE false 143 # define CONF_CLOCK_GCLK_4_RUN_IN_STANDBY false 144 # define CONF_CLOCK_GCLK_4_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M 145 # define CONF_CLOCK_GCLK_4_PRESCALER 1 146 # define CONF_CLOCK_GCLK_4_OUTPUT_ENABLE false 147 148 /* Configure GCLK generator 5 */ 149 # define CONF_CLOCK_GCLK_5_ENABLE false 150 # define CONF_CLOCK_GCLK_5_RUN_IN_STANDBY false 151 # define CONF_CLOCK_GCLK_5_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M 152 # define CONF_CLOCK_GCLK_5_PRESCALER 1 153 # define CONF_CLOCK_GCLK_5_OUTPUT_ENABLE false 154 155 /* Configure GCLK generator 6 */ 156 # define CONF_CLOCK_GCLK_6_ENABLE false 157 # define CONF_CLOCK_GCLK_6_RUN_IN_STANDBY false 158 # define CONF_CLOCK_GCLK_6_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M 159 # define CONF_CLOCK_GCLK_6_PRESCALER 1 160 # define CONF_CLOCK_GCLK_6_OUTPUT_ENABLE false 161 162 /* Configure GCLK generator 7 */ 163 # define CONF_CLOCK_GCLK_7_ENABLE false 164 # define CONF_CLOCK_GCLK_7_RUN_IN_STANDBY false 165 # define CONF_CLOCK_GCLK_7_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M 166 # define CONF_CLOCK_GCLK_7_PRESCALER 1 167 # define CONF_CLOCK_GCLK_7_OUTPUT_ENABLE false 168 169 #endif /* CONF_CLOCKS_H_INCLUDED */ 170 171