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Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Atmel/TARGET_SAM21/pinmap_function.c@592:a274ee790e56, 2015-07-17 (annotated)

Committer:
mbed_official
Date:
Fri Jul 17 09:15:10 2015 +0100
Revision:
592:a274ee790e56
Synchronized with git revision e7144f83a8d75df80c4877936b6ffe552b0be9e6



Full URL: https://github.com/mbedmicro/mbed/commit/e7144f83a8d75df80c4877936b6ffe552b0be9e6/



More API implementation for SAMR21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 592:a274ee790e56 1 /* mbed Microcontroller Library
mbed_official 592:a274ee790e56 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 592:a274ee790e56 3 *
mbed_official 592:a274ee790e56 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 592:a274ee790e56 5 * you may not use this file except in compliance with the License.
mbed_official 592:a274ee790e56 6 * You may obtain a copy of the License at
mbed_official 592:a274ee790e56 7 *
mbed_official 592:a274ee790e56 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 592:a274ee790e56 9 *
mbed_official 592:a274ee790e56 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 592:a274ee790e56 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 592:a274ee790e56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 592:a274ee790e56 13 * See the License for the specific language governing permissions and
mbed_official 592:a274ee790e56 14 * limitations under the License.
mbed_official 592:a274ee790e56 15 */
mbed_official 592:a274ee790e56 16 #include <stddef.h>
mbed_official 592:a274ee790e56 17 #include "us_ticker_api.h"
mbed_official 592:a274ee790e56 18 #include "cmsis.h"
mbed_official 592:a274ee790e56 19 #include "mbed_assert.h"
mbed_official 592:a274ee790e56 20 #include "ins_gclk.h"
mbed_official 592:a274ee790e56 21 #include "compiler.h"
mbed_official 592:a274ee790e56 22 #include "system.h"
mbed_official 592:a274ee790e56 23
mbed_official 592:a274ee790e56 24 #include "pinmap_function.h"
mbed_official 592:a274ee790e56 25
mbed_official 592:a274ee790e56 26 static uint32_t pinmap_merge_pins(uint32_t a, uint32_t b)
mbed_official 592:a274ee790e56 27 {
mbed_official 592:a274ee790e56 28 // both are the same (inc both NC)
mbed_official 592:a274ee790e56 29 if (a == b)
mbed_official 592:a274ee790e56 30 return a;
mbed_official 592:a274ee790e56 31
mbed_official 592:a274ee790e56 32 // one (or both) is not connected
mbed_official 592:a274ee790e56 33 if (a == (uint32_t)NC)
mbed_official 592:a274ee790e56 34 return b;
mbed_official 592:a274ee790e56 35 if (b == (uint32_t)NC)
mbed_official 592:a274ee790e56 36 return a;
mbed_official 592:a274ee790e56 37
mbed_official 592:a274ee790e56 38 return (uint32_t)NC;
mbed_official 592:a274ee790e56 39 }
mbed_official 592:a274ee790e56 40
mbed_official 592:a274ee790e56 41 /** Find the common SERCOM shared by two pins
mbed_official 592:a274ee790e56 42 *
mbed_official 592:a274ee790e56 43 * Finds the common SERCOM index of two input pins.
mbed_official 592:a274ee790e56 44 * If swapping the input argument gives different result, it means, two SERCOMs share both pins
mbed_official 592:a274ee790e56 45 * @param[in] pin1 First pin
mbed_official 592:a274ee790e56 46 * @param[in] pin2 Second pin
mbed_official 592:a274ee790e56 47 * @return SERCOM index if found, else, NC
mbed_official 592:a274ee790e56 48 */
mbed_official 592:a274ee790e56 49 uint32_t pinmap_merge_sercom(PinName pin1, PinName pin2)
mbed_official 592:a274ee790e56 50 {
mbed_official 592:a274ee790e56 51 int i, j;
mbed_official 592:a274ee790e56 52 uint32_t pin1_sercom[2];
mbed_official 592:a274ee790e56 53 uint32_t pin2_sercom[2];
mbed_official 592:a274ee790e56 54 uint32_t sercom_index[4];
mbed_official 592:a274ee790e56 55
mbed_official 592:a274ee790e56 56 uint32_t pin_com = NC;
mbed_official 592:a274ee790e56 57 uint32_t pin_alt = NC;
mbed_official 592:a274ee790e56 58 uint32_t count_com = 0;
mbed_official 592:a274ee790e56 59 uint32_t count_alt = 0;
mbed_official 592:a274ee790e56 60
mbed_official 592:a274ee790e56 61 /* Adding a condition check just in case we need a different result when swapping arguments */
mbed_official 592:a274ee790e56 62 if (pin1 >= pin2) {
mbed_official 592:a274ee790e56 63 pin1_sercom[0] = pinmap_find_peripheral(pin1, PinMap_SERCOM_PAD);
mbed_official 592:a274ee790e56 64 pin1_sercom[1] = pinmap_find_peripheral(pin1, PinMap_SERCOM_PADEx);
mbed_official 592:a274ee790e56 65 } else {
mbed_official 592:a274ee790e56 66 pin1_sercom[0] = pinmap_find_peripheral(pin1, PinMap_SERCOM_PADEx);
mbed_official 592:a274ee790e56 67 pin1_sercom[1] = pinmap_find_peripheral(pin1, PinMap_SERCOM_PAD);
mbed_official 592:a274ee790e56 68 }
mbed_official 592:a274ee790e56 69
mbed_official 592:a274ee790e56 70 pin2_sercom[0] = pinmap_find_peripheral(pin2, PinMap_SERCOM_PAD);
mbed_official 592:a274ee790e56 71 pin2_sercom[1] = pinmap_find_peripheral(pin2, PinMap_SERCOM_PADEx);
mbed_official 592:a274ee790e56 72
mbed_official 592:a274ee790e56 73 for (i=0; i<2; i++) {
mbed_official 592:a274ee790e56 74 if (pin1_sercom[i] != NC) {
mbed_official 592:a274ee790e56 75 pin1_sercom[i] &= 0x0F;
mbed_official 592:a274ee790e56 76 }
mbed_official 592:a274ee790e56 77 for (j=0; j<2; j++) {
mbed_official 592:a274ee790e56 78 if (pin2_sercom[i] != NC) {
mbed_official 592:a274ee790e56 79 pin2_sercom[i] &= 0x0F;
mbed_official 592:a274ee790e56 80 }
mbed_official 592:a274ee790e56 81 sercom_index[(i*2) + j] = pinmap_merge_pins(pin1_sercom[i], pin2_sercom[j]);
mbed_official 592:a274ee790e56 82 }
mbed_official 592:a274ee790e56 83 }
mbed_official 592:a274ee790e56 84
mbed_official 592:a274ee790e56 85 for (i=0; i<4; i++) {
mbed_official 592:a274ee790e56 86 if (sercom_index[i] != NC) {
mbed_official 592:a274ee790e56 87 if (pin_com == NC) {
mbed_official 592:a274ee790e56 88 pin_com = sercom_index[i];
mbed_official 592:a274ee790e56 89 count_com++;
mbed_official 592:a274ee790e56 90 } else if (pin_com == sercom_index[i]) {
mbed_official 592:a274ee790e56 91 count_com++;
mbed_official 592:a274ee790e56 92 } else if (pin_alt == NC) {
mbed_official 592:a274ee790e56 93 pin_alt = sercom_index[i];
mbed_official 592:a274ee790e56 94 count_alt++;
mbed_official 592:a274ee790e56 95 } else if (pin_alt == sercom_index[i]) {
mbed_official 592:a274ee790e56 96 count_alt++;
mbed_official 592:a274ee790e56 97 } else {}
mbed_official 592:a274ee790e56 98 }
mbed_official 592:a274ee790e56 99 }
mbed_official 592:a274ee790e56 100 return ((count_com >= count_alt) ? pin_com : pin_alt);
mbed_official 592:a274ee790e56 101 }
mbed_official 592:a274ee790e56 102
mbed_official 592:a274ee790e56 103 /** Find the common SERCOM shared by four pins
mbed_official 592:a274ee790e56 104 *
mbed_official 592:a274ee790e56 105 * Finds the common SERCOM index shared by four input pins.
mbed_official 592:a274ee790e56 106 * If reversing the input argument order gives different result, it means, two SERCOMs share the pins
mbed_official 592:a274ee790e56 107 * @param[in] pin1 First pin
mbed_official 592:a274ee790e56 108 * @param[in] pin2 Second pin
mbed_official 592:a274ee790e56 109 * @param[in] pin3 Third pin
mbed_official 592:a274ee790e56 110 * @param[in] pin4 Fourth pin
mbed_official 592:a274ee790e56 111 * @return SERCOM index if found, else, NC
mbed_official 592:a274ee790e56 112 */
mbed_official 592:a274ee790e56 113 uint32_t pinmap_find_sercom(PinName pin1, PinName pin2, PinName pin3, PinName pin4)
mbed_official 592:a274ee790e56 114 {
mbed_official 592:a274ee790e56 115 int i;
mbed_official 592:a274ee790e56 116 uint32_t sercom_index[4];
mbed_official 592:a274ee790e56 117 uint32_t pin_com = NC;
mbed_official 592:a274ee790e56 118 uint32_t pin_alt = NC;
mbed_official 592:a274ee790e56 119 uint32_t count_com = 0;
mbed_official 592:a274ee790e56 120 uint32_t count_alt = 0;
mbed_official 592:a274ee790e56 121
mbed_official 592:a274ee790e56 122 sercom_index[0] = pinmap_merge_sercom(pin1, pin2);
mbed_official 592:a274ee790e56 123 sercom_index[1] = pinmap_merge_sercom(pin3, pin3);
mbed_official 592:a274ee790e56 124 sercom_index[2] = pinmap_merge_sercom(pin1, pin3);
mbed_official 592:a274ee790e56 125 sercom_index[3] = pinmap_merge_sercom(pin2, pin4);
mbed_official 592:a274ee790e56 126
mbed_official 592:a274ee790e56 127
mbed_official 592:a274ee790e56 128 for (i=0; i<4; i++) {
mbed_official 592:a274ee790e56 129 if (sercom_index[i] != NC) {
mbed_official 592:a274ee790e56 130 if (pin_com == NC) {
mbed_official 592:a274ee790e56 131 pin_com = sercom_index[i];
mbed_official 592:a274ee790e56 132 count_com++;
mbed_official 592:a274ee790e56 133 } else if (pin_com == sercom_index[i]) {
mbed_official 592:a274ee790e56 134 count_com++;
mbed_official 592:a274ee790e56 135 } else if (pin_alt == NC) {
mbed_official 592:a274ee790e56 136 pin_alt = sercom_index[i];
mbed_official 592:a274ee790e56 137 count_alt++;
mbed_official 592:a274ee790e56 138 } else if (pin_alt == sercom_index[i]) {
mbed_official 592:a274ee790e56 139 count_alt++;
mbed_official 592:a274ee790e56 140 } else {}
mbed_official 592:a274ee790e56 141 }
mbed_official 592:a274ee790e56 142 }
mbed_official 592:a274ee790e56 143 return ((count_com >= count_alt) ? pin_com : pin_alt);
mbed_official 592:a274ee790e56 144 }
mbed_official 592:a274ee790e56 145
mbed_official 592:a274ee790e56 146 /** Find the MUX function of input pin specific to given SERCOM index
mbed_official 592:a274ee790e56 147 *
mbed_official 592:a274ee790e56 148 * @param[in] pin Pin whose function is to be found out
mbed_official 592:a274ee790e56 149 * @param[in] sercom_index SERCOM index
mbed_official 592:a274ee790e56 150 * @return MUX function if found, else, NC
mbed_official 592:a274ee790e56 151 */
mbed_official 592:a274ee790e56 152 uint32_t pinmap_function_sercom(PinName pin, uint32_t sercom_index)
mbed_official 592:a274ee790e56 153 {
mbed_official 592:a274ee790e56 154 uint32_t func = NC;
mbed_official 592:a274ee790e56 155 uint32_t index;
mbed_official 592:a274ee790e56 156 sercom_index &= 0x0F;
mbed_official 592:a274ee790e56 157
mbed_official 592:a274ee790e56 158 if ((pin == NC) || (sercom_index >= SERCOM_INST_NUM)) {
mbed_official 592:a274ee790e56 159 return NC;
mbed_official 592:a274ee790e56 160 }
mbed_official 592:a274ee790e56 161 index = pinmap_peripheral(pin, PinMap_SERCOM_PAD);
mbed_official 592:a274ee790e56 162 if ((index & 0x0F) == sercom_index) {
mbed_official 592:a274ee790e56 163 func = pinmap_function(pin, PinMap_SERCOM_PAD);
mbed_official 592:a274ee790e56 164 return func;
mbed_official 592:a274ee790e56 165 }
mbed_official 592:a274ee790e56 166 index = pinmap_peripheral(pin, PinMap_SERCOM_PADEx);
mbed_official 592:a274ee790e56 167 if ((index & 0x0F) == sercom_index) {
mbed_official 592:a274ee790e56 168 func = pinmap_function(pin, PinMap_SERCOM_PADEx);
mbed_official 592:a274ee790e56 169 return func;
mbed_official 592:a274ee790e56 170 }
mbed_official 592:a274ee790e56 171 return NC;
mbed_official 592:a274ee790e56 172 }
mbed_official 592:a274ee790e56 173
mbed_official 592:a274ee790e56 174 /** Find the MUX pad of input pin specific to given SERCOM index
mbed_official 592:a274ee790e56 175 *
mbed_official 592:a274ee790e56 176 * @param[in] pin Pin whose function is to be found out
mbed_official 592:a274ee790e56 177 * @param[in] sercom_index SERCOM index
mbed_official 592:a274ee790e56 178 * @return MUX pad if found, else, NC
mbed_official 592:a274ee790e56 179 */
mbed_official 592:a274ee790e56 180 uint32_t pinmap_pad_sercom(PinName pin, uint32_t sercom_index)
mbed_official 592:a274ee790e56 181 {
mbed_official 592:a274ee790e56 182 uint32_t index;
mbed_official 592:a274ee790e56 183 sercom_index &= 0x0F;
mbed_official 592:a274ee790e56 184
mbed_official 592:a274ee790e56 185 if ((pin == NC) || (sercom_index >= SERCOM_INST_NUM)) {
mbed_official 592:a274ee790e56 186 return NC;
mbed_official 592:a274ee790e56 187 }
mbed_official 592:a274ee790e56 188 index = pinmap_peripheral(pin, PinMap_SERCOM_PAD);
mbed_official 592:a274ee790e56 189 if ((index & 0x0F) == sercom_index) {
mbed_official 592:a274ee790e56 190 return ((index >> 4) & 0x0F);
mbed_official 592:a274ee790e56 191 }
mbed_official 592:a274ee790e56 192 index = pinmap_peripheral(pin, PinMap_SERCOM_PADEx);
mbed_official 592:a274ee790e56 193 if ((index & 0x0F) == sercom_index) {
mbed_official 592:a274ee790e56 194 return ((index >> 4) & 0x0F);
mbed_official 592:a274ee790e56 195 }
mbed_official 592:a274ee790e56 196 return NC;
mbed_official 592:a274ee790e56 197 }
mbed_official 592:a274ee790e56 198
mbed_official 592:a274ee790e56 199 /** Find the MUX function of input pin specific to given SERCOM index
mbed_official 592:a274ee790e56 200 *
mbed_official 592:a274ee790e56 201 * @param[in] pin unused
mbed_official 592:a274ee790e56 202 * @param[in] sercom_index SERCOM index
mbed_official 592:a274ee790e56 203 * @return base address to SERCOM if found, else NC
mbed_official 592:a274ee790e56 204 */
mbed_official 592:a274ee790e56 205 uint32_t pinmap_peripheral_sercom(PinName pin, uint32_t sercom_index)
mbed_official 592:a274ee790e56 206 {
mbed_official 592:a274ee790e56 207 uint32_t sercom_address[6] = {
mbed_official 592:a274ee790e56 208 0x42000800UL, // Base address of SERCOM0
mbed_official 592:a274ee790e56 209 0x42000C00UL, // Base address of SERCOM1
mbed_official 592:a274ee790e56 210 0x42001000UL, // Base address of SERCOM2
mbed_official 592:a274ee790e56 211 0x42001400UL, // Base address of SERCOM3
mbed_official 592:a274ee790e56 212 0x42001800UL, // Base address of SERCOM4
mbed_official 592:a274ee790e56 213 0x42001C00UL // Base address of SERCOM5
mbed_official 592:a274ee790e56 214 };
mbed_official 592:a274ee790e56 215 uint32_t index = sercom_index & 0x0F;
mbed_official 592:a274ee790e56 216
mbed_official 592:a274ee790e56 217 if (index >= SERCOM_INST_NUM) {
mbed_official 592:a274ee790e56 218 return NC;
mbed_official 592:a274ee790e56 219 }
mbed_official 592:a274ee790e56 220 return sercom_address[(sercom_index&0x0F)];
mbed_official 592:a274ee790e56 221 }